IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0034600
(2008-02-20)
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등록번호 |
US-8100430
(2012-01-24)
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발명자
/ 주소 |
- Meyers, Paul F.
- Meyers, Thomas J.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
14 인용 특허 :
19 |
초록
A multi-mode hand truck is convertible to assume a hand-truck mode, a reclined load-assist mode, and a push-cart mode.
대표청구항
▼
1. A multi-mode hand truck comprising a rolling base including a load carrier and a carrier wheel unit coupled to the load carriera rolling load-carrier stabilizer including an outrigger wheel unit and outrigger-wheel deployment means for moving the outrigger wheel unit from a retracted storage posi
1. A multi-mode hand truck comprising a rolling base including a load carrier and a carrier wheel unit coupled to the load carriera rolling load-carrier stabilizer including an outrigger wheel unit and outrigger-wheel deployment means for moving the outrigger wheel unit from a retracted storage position located in close proximity to the load carrier and away from ground underlying and engaging the carrier wheel unit and arranged to cause the rolling load-carrier stabilizer to cooperate with the rolling base to establish a two-wheel hand truck mode to an extended carrier-stabilizer position located in spaced-apart relation to the load carrier and in contact with ground underlying and engaging the carrier wheel unit and arranged to cause the rolling load-carrier stabilizer to cooperate with the rolling base to establish an outrigger-wheel hand truck mode in response to movement of the outrigger wheel unit in an inward direction toward the carrier wheel unitwherein the outrigger-wheel deployment means includes an extensible wheel-support frame coupled to the outrigger wheel unit and the extensible wheel-support frame is also coupled to the load carrier for pivotable movement about a first carrier pivot axis and is configured to vary in length to vary distance between the outrigger wheel unit and the carrier wheel unit during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position and the carrier wheel unit andwherein the outrigger-wheel deployment means further includes a pivotable carrier-recline support link coupled at one end thereof to the load carrier for pivotable movement about a second carrier pivot axis and at another end thereof to the extensible wheel-support frame for pivotable movement about a frame mount pivot axis and wherein the pivotable carrier-recline support link is configured to pivot about the second carrier pivot axis and the frame mount pivot axis during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position and to provide means for supporting the load carrier in a reclined position relative to the extensible wheel-support frame in response to movement of the outrigger wheel unit to the extended carrier-stabilizer position. 2. The multi-mode hand truck of claim 1, wherein the extensible wheel-support frame includes an outrigger-wheel mount coupled to an end of the pivotable carrier-recline support link at the frame mount pivot axis and to the outrigger wheel unit and an outrigger-wheel mount foundation pivotably coupled to the load carrier at the first carrier pivot axis and coupled to the outrigger-wheel mount for sliding movement relative thereto to vary the length of the extensible wheel-support frame during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position to cause the extensible wheel-support frame to assume a short length when the outrigger wheel unit occupies the retracted storage position and to assume a relatively longer length when the outrigger wheel unit occupies the extended carrier-stabilizer position. 3. The multi-mode hand truck of claim 1, wherein the rolling load-carrier stabilizer further includes frame position-retainer means for selectively keeping the extensible wheel-support frame in one of a lengthened position arranged to lie alongside the load carrier upon movement of the outrigger wheel unit to assume the retracted storage position to retain the outrigger wheel unit in the retracted storage position to establish and maintain the two-wheel hand truck mode and a shortened position arranged to lie at an angle to the load carrier upon movement of the outrigger wheel unit to assume the extended carrier-stabilizer position to retain the outrigger wheel unit in the extended carrier-stabilizer position and establish and maintain the outrigger-wheel hand truck mode. 4. The multi-mode hand truck of claim 3, wherein the frame position-retainer means includes a carrier-anchor receiver coupled to the load carrier and a frame lock unit coupled to the extensible wheel-support frame and the frame lock unit includes a load-carrier anchor and an anchor mover, the load-carrier anchor is configured to mate with the carrier-anchor receiver upon movement of the extensible wheel-support frame to the lengthened position arranged to lie alongside the load carrier to block movement of the outrigger wheel unit away from the retracted storage position, and the anchor mover is coupled to the extensible wheel-support frame and configured to provide means for moving the load-carrier anchor relative to the carrier-anchor receiver to separate from the carrier-anchor receiver to free the extensible wheel-support frame to move from the lengthened position toward the shortened position. 5. The multi-mode hand truck of claim 3, wherein the extensible wheel-support frame includes an outrigger-wheel mount foundation pivotably coupled to the load carrier at the first carrier pivot axis and an outrigger-wheel mount coupled to the outrigger wheel unit and mounted to move on and relative to the outrigger-wheel mount foundation to cause the outrigger wheel unit to move in the inward direction toward the carrier wheel unit during movement of the outrigger wheel unit from the retracted storage position to the extended carrier-stabilizer position and wherein the frame position-retainer means includes a foundation-anchor receiver coupled to the outrigger-wheel mount foundation and a frame lock unit coupled to the outrigger-wheel mount, the frame lock unit includes a foundation anchor and an anchor mover, the foundation anchor is configured to mate with the foundation-anchor receiver upon movement of the outrigger-wheel mount relative to the outrigger-wheel mount foundation to shorten the length of the extensible wheel-support frame to block relative movement of the outrigger-wheel mount and the outrigger-wheel mount foundation and retain the outrigger wheel unit in the extended carrier-stabilizer position to maintain the outrigger-wheel hand truck mode. 6. The multi-mode hand truck of claim 3, wherein the rolling base is oriented to cause a carrier wheel included in the carrier wheel unit to engage the ground underlying the carrier wheel unit and an outrigger wheel included in the outrigger wheel unit to engage the ground while the frame position-retainer means keeps the extensible wheel-support frame in the lengthened position to establish a push cart and further comprising a base pusher coupled to the load carrier of the rolling base, the base pusher including a push handle and handle position-retainer means for selectively keeping the push handle in a retracted truck-pusher position arranged to lie alongside the load carrier during configuration of the rolling load-carrier stabilizer to establish the two-wheel hand truck mode and also to establish the outrigger-wheel hand truck mode and an extended cart-pusher position arranged to extend upwardly away from the load carrier and the outrigger wheel unit to establish the push-cart mode. 7. The multi-mode hand truck of claim 6, wherein the handle position-retainer means includes a first anchor receiver coupled to the push handle, a second anchor receiver coupled to the push handle, and a handle lock unit coupled to the load carrier, the handle lock unit includes a first anchor configured to mate with the first anchor receiver upon movement of the push handle to the retracted truck-pusher position, a second anchor configured to mate with the second anchor receiver upon movement of the push handle to the extended cart-pusher position, and an anchor mover coupled to the first and second anchors and to the load carrier and configured to provide means for separating the first anchor from the first anchor receiver and the second anchor from the second anchor receiver to free the push handle for movement relative to the load carrier between the retracted truck-pusher position and the extended cart-pusher position. 8. The multi-mode hand truck of claim 7, wherein the push handle includes an inner end coupled to the load carrier for sliding movement in a channel formed in the load carrier and the base pusher further includes a pivotable push-handle support link coupled at one end thereof to the load carrier for pivotable movement about a third carrier pivot axis and at another end thereof to the push handle for pivotable movement about a handle mount pivot axis arranged to lie between the first and second anchor receivers and wherein the pivotable push-handle support link is configured to pivot about the third carrier pivot axis and the handle mount pivot axis during movement of the push handle between the retracted truck-pusher position and the extended cart-pusher position. 9. The multi-mode hand truck of claim 1, wherein the outrigger-wheel deployment means includes an outrigger-wheel mount foundation coupled to the load carrier and an outrigger-wheel mount coupled to the outrigger wheel unit and mounted to move on and relative to the outrigger-wheel mount foundation to cause the outrigger wheel unit to move in the inward direction toward the carrier wheel unit during movement of the outrigger wheel unit from the retracted storage position to the extended carrier-stabilizer position. 10. The multi-mode hand truck of claim 9, wherein the outrigger-wheel mount foundation includes a first foundation leg and the outrigger-wheel mount includes a first mount leg coupled to the first foundation leg to move relative to the first foundation leg during movement of the outrigger wheel unit relative to the carrier wheel unit. 11. The multi-mode hand truck of claim 10, wherein the first foundation leg is coupled to the load carrier for pivotable movement about a first carrier pivot axis during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position and relative to the carrier wheel unit. 12. The multi-mode hand truck of claim 10, wherein the outrigger-wheel mount foundation further includes a second foundation leg arranged to lie in spaced-apart relation to the first foundation leg and a foundation crossbar arranged to interconnect the first and second foundation legs, the outrigger-wheel mount includes a second mount leg coupled to the second foundation leg to move relative to the second foundation leg during movement of the outrigger wheel unit relative to the carrier wheel unit and a mount-leg connector coupled to the first and second mount legs to move therewith relative to the first and second foundation legs, and the outrigger wheel unit is coupled to the mount-leg connector to move therewith. 13. The multi-mode hand truck of claim 9, wherein the outrigger-wheel mount foundation is coupled to the load carrier of the rolling base for pivotable movement about a first carrier pivot axis during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position. 14. The multi-mode hand truck of claim 13, wherein the rolling load-carrier stabilizer further includes a pivotable carrier-recline support link coupled at one end thereof to the load carrier for pivotable movement about a second carrier pivot axis arranged to lie in spaced-apart parallel relation to the first carrier pivot axis and coupled at another end thereof to the outrigger-wheel mount for pivotable movement about a frame mount pivot axis arranged to lie in spaced-apart parallel relation to each of the first and second carrier pivot axes and wherein the pivotable carrier-recline support link is configured to pivot about the second carrier pivot axis and the frame mount pivot axis during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position and to provide means for supporting the load carrier in a reclined position in response to movement of the outrigger wheel unit to the extended carrier-stabilizer position. 15. The multi-mode hand truck of claim 13, wherein the outrigger-wheel mount foundation includes spaced-apart first and second foundation legs and a foundation crossbar arranged to interconnect the first and second foundation legs and lie in spaced-apart relation to the first carrier pivot axis and each of the first and second foundation legs is pivotably coupled to the load carrier at the first carrier pivot axis. 16. The multi-mode hand truck of claim 15, wherein the outrigger-wheel mount includes a first mount leg coupled to a proximal portion of the first foundation leg to slide back and forth thereon during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position, a second mount leg coupled to a proximal portion of the second foundation leg to slide back and forth thereon during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position, and a mount-leg connector arranged to interconnect distal portions of the first and second mount legs and the outrigger wheel unit is coupled to the mount-leg connector to cause the outrigger wheel unit to move toward and away from the carrier wheel unit during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position. 17. The multi-mode hand truck of claim 9, wherein the rolling load-carrier stabilizer includes an outrigger-wheel mount position retainer configured to provide means for selectively retaining the outrigger-wheel mount in a stationary expanded position relative to the outrigger-wheel mount foundation to cause the outrigger wheel unit to lie a first distance from the carrier wheel unit upon movement of the outrigger wheel unit to assume the retracted storage position to establish the two-wheel hand truck mode and for retaining the outrigger-wheel mount in a stationary contracted position relative to the outrigger-wheel mount foundation to cause the outrigger wheel unit to lie a lesser second distance from the carrier wheel unit upon movement of the outrigger wheel unit to assume the extended carrier-stabilizer position to establish the outrigger-wheel hand truck mode. 18. The multi-mode hand truck of claim 17, wherein the outrigger-wheel mount position retainer includes a foundation-anchor receiver coupled to the outrigger-wheel foundation mount and a frame lock unit coupled to the outrigger-wheel mount, the frame lock unit includes a foundation anchor and an anchor mover, the foundation anchor is configured to mate with the foundation-anchor receiver upon movement of the outrigger-wheel mount relative to the outrigger-wheel mount foundation to assume the stationary contracted position to block relative movement of the outrigger-wheel mount and the outrigger-wheel mount foundation and retain the outrigger wheel unit in the extended carrier-stabilizer position to maintain the outrigger-wheel hand truck mode, and the anchor mover is coupled to the outrigger-wheel mount and configured to provide means for moving the foundation anchor relative to the foundation-anchor receiver to separate from the foundation-anchor receiver to free the outrigger-wheel mount to move relative to the outrigger-wheel mount foundation. 19. The multi-mode hand truck of claim 18, wherein the outrigger-wheel mount foundation includes spaced-apart first and second foundation legs and the foundation-anchor receiver is a crossbar arranged to interconnect the spaced-apart first and second foundation legs. 20. The multi-mode hand truck of claim 18, wherein the outrigger-wheel mount includes spaced-apart first and second mount legs and a mount crossbar arranged to extend between the first and second mount legs and the anchor mover is coupled to the mount crossbar to move therewith relative to the outrigger-wheel mount foundation. 21. The multi-mode hand truck of claim 20, wherein the outrigger-wheel mount foundation includes spaced-apart first and second foundation legs and the foundation-anchor receiver is a crossbar arranged to interconnect the spaced-apart first and second foundation legs. 22. The multi-mode hand truck of claim 17, wherein the outrigger-wheel mount position retainer includes a carrier-anchor receiver coupled to the load carrier and a frame lock unit coupled to the outrigger-wheel mount, the frame lock unit includes a load-carrier anchor and an anchor mover, the load-carrier anchor is configured to mate with the carrier-anchor receiver upon movement of the outrigger-wheel mount relative to the outrigger-wheel mount foundation to assume the stationary expanded position and movement of the outrigger wheel unit to assume the retracted storage position to block relative movement of the outrigger wheel movement away from the retracted storage position, and the anchor mover is coupled to the outrigger-wheel mount and configured to provide means for moving the load-carrier anchor relative to the carrier-anchor receiver to separate from the carrier-anchor receiver to free the outrigger-wheel mount to move relative to the load carrier. 23. The multi-mode hand truck of claim 22, wherein the load carrier includes a truck frame and a toe-plate shelf coupled to the truck frame, the truck frame includes spaced-apart first and second upright rails, and the carrier-anchor receiver is a crossbar arranged to interconnect the spaced-apart first and second upright rails. 24. The multi-mode hand truck of claim 23, wherein the first upright rail is formed to include a lug-receiver channel opening toward the outrigger-wheel mount upon movement of the outrigger wheel unit to assume the retracted storage position and the outrigger-wheel mount includes a lug arranged to extend into the lug-receiver channel upon movement of the outrigger wheel unit to assume the retracted storage position to limit lateral movement of the outrigger wheel unit relative to the truck frame. 25. A multi-mode hand truck comprising a rolling base including a load carrier and a carrier wheel unit coupled to the load carrier, the load carrier having a toe plate shelf and a truck frame extending up from the toe plate shelf, anda rolling load-carrier stabilizer including an outrigger wheel unit and an outrigger-wheel mover coupled to the load carrier and to the outrigger wheel unit, wherein the outrigger-wheel mover includes an extensible wheel-support frame coupled to the load carrier for pivotable movement about a first carrier pivot axis and a pivotable carrier-recline support link coupled to the load carrier for pivotable movement about a second carrier pivot axis and to the extensible wheel-support frame for pivotable movement about a frame mount pivot axis and wherein the outrigger wheel unit is coupled to the extensible wheel-support frame and the extensible wheel-support frame is arranged to move between a retracted storage position located along and substantially parallel to the truck frame and an extended carrier-stabilizer position away from the load carrier during pivoting movement of the extensible wheel-support frame about the first carrier pivot axis and pivoting movement of the pivotable carrier-recline support link about the second carrier pivot axis and the frame mount pivot axis, further comprising a base pusher coupled to the load carrier, and wherein the base pusher includes a push handle coupled to the load carrier for slidable movement relative to the load carrier and a pivotable push-handle support link coupled to the load carrier for pivotable movement about a third carrier pivot axis and to the push handle for pivotable movement about a handle mount pivot axis, and wherein the push handle is arranged to move relative to the load carrier while slidably coupled to the load carrier between a retracted truck-pusher position arranged to lie alongside the load carrier and an extended cart-pusher position extending upwardly away from the load carrier during pivoting movement of the pivotable push-handle support link about the third carrier pivot axis and the handle mount pivot axis. 26. A multi-mode hand truck comprising a rolling base including a load carrier and a carrier wheel unit coupled to the load carrier,a rolling load-carrier stabilizer including a foldable stabilizer frame coupled to the load carrier for movement relative to the load carrier between a folded position and an unfolded position, an outrigger wheel unit coupled to the foldable stabilizer frame for movement therewith between a retracted storage position alongside the load carrier and an extended carrier-stabilizer position away from the load carrier, and a frame lock unit coupled to the foldable stabilizer frame and configured to mate with the load carrier to retain the outrigger wheel unit in the retracted storage position and further configured to un-mate and be spaced-apart from the load carrier in the extended carrier-stabilizer position, andwherein the foldable stabilizer frame includes an extensible wheel-support frame including an outrigger-wheel mount coupled to the outrigger wheel unit and an outrigger-wheel mount foundation coupled to the load carrier, the outrigger-wheel mount is coupled to the outrigger-wheel mount foundation for relative movement to lengthen the extensible wheel-support frame upon movement of the outrigger wheel unit to the retracted storage position and to shorten the extensible wheel-support frame upon movement of the outrigger wheel unit to the extended carrier-stabilizer position, and the frame lock unit is coupled to the outrigger-wheel mount to move therewith and formed to include a load carrier anchor configured to mate with the load carrier to retain the outrigger wheel unit in the retracted storage position, a foundation anchor configured to mate with the outrigger-wheel mount foundation to retain the outrigger wheel unit in the extended carrier-stabilizer position, and an anchor mover coupled to the load-carrier anchor and to the foundation anchor to move those anchors relative to the foldable stabilizer frame to free the foldable stabilizer frame for movement relative to the load carrier. 27. The multi-mode hand truck of claim 26, wherein the foldable stabilizer frame further includes a pivotable carrier-recline support link pivotably coupled to the load carrier and to the outrigger-wheel mount to move relative to the extensible wheel-support frame during folding and unfolding of the foldable stabilizer frame. 28. A multi-mode hand truck comprising a push cart including a rolling base including a load carrier and a carrier wheel unit coupled to the load carrier, a wheel support coupled to the load carrier, and an outrigger wheel unit mounted on the wheel support and arranged to lie in spaced-apart relation to the carrier wheel unit, anda pusher coupled to the load carrier, wherein the pusher includes a push handle coupled to the load carrier for slidable movement relative to the load carrier and a pivotable push-handle support link directly coupled to the load carrier for pivotable movement about a carrier pivot axis and to the push handle for pivotable movement about a handle mount pivot axis and wherein the push handle is arranged to move relative to the load carrier while slidably coupled to the load carrier between a retracted truck-pusher position arranged to lie alongside the load carrier and an extended cart-pusher position extending upwardly away from the load carrier during pivoting movement of the pivotable push-handle support link about the carrier pivot axis and the handle mount pivot axis. 29. A multi-mode hand truck comprising a rolling base including a load carrier and a carrier wheel unit coupled to the load carriera rolling load-carrier stabilizer including an outrigger wheel unit and outrigger-wheel deployment means for moving the outrigger wheel unit from a retracted storage position located in close proximity to the load carrier and away from ground underlying and engaging the carrier wheel unit and arranged to cause the rolling load-carrier stabilizer to cooperate with the rolling base to establish a two-wheel hand truck mode to an extended carrier-stabilizer position located in spaced-apart relation to the load carrier and in contact with ground underlying and engaging the carrier wheel unit and arranged to cause the rolling load-carrier stabilizer to cooperate with the rolling base to establish an outrigger-wheel hand truck mode in response to movement of the outrigger wheel unit in an inward direction toward the carrier wheel unitwherein the outrigger-wheel deployment means includes an extensible wheel-support frame coupled to the outrigger wheel unit and the extensible wheel-support frame is also coupled to the load carrier for pivotable movement about a first carrier pivot axis and is configured to vary in length to vary distance between the outrigger wheel unit and the carrier wheel unit during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position and the carrier wheel unitwherein the rolling load-carrier stabilizer further includes frame position-retainer means for selectively keeping the extensible wheel-support frame in one of a lengthened position arranged to lie alongside the load carrier upon movement of the outrigger wheel unit to assume the retracted storage position to retain the outrigger wheel unit in the retracted storage position to establish and maintain the two-wheel hand truck mode and a shortened position arranged to lie at an angle to the load carrier upon movement of the outrigger wheel unit to assume the extended carrier-stabilizer position to retain the outrigger wheel unit in the extended carrier-stabilizer position and establish and maintain the outrigger-wheel hand truck mode andwherein the frame position-retainer means includes a carrier-anchor receiver coupled to the load carrier and a frame lock unit coupled to the extensible wheel-support frame and the frame lock unit includes a load-carrier anchor and an anchor mover, the load-carrier anchor is configured to mate with the carrier-anchor receiver upon movement of the extensible wheel-support frame to the lengthened position arranged to lie alongside the load carrier to block movement of the outrigger wheel unit away from the retracted storage position, and the anchor mover is coupled to the extensible wheel-support frame and configured to provide means for moving the load-carrier anchor relative to the carrier-anchor receiver to separate from the carrier-anchor receiver to free the extensible wheel-support frame to move from the lengthened position toward the shortened position. 30. A multi-mode hand truck comprising a rolling base including a load carrier and a carrier wheel unit coupled to the load carriera rolling load-carrier stabilizer including an outrigger wheel unit and outrigger-wheel deployment means for moving the outrigger wheel unit from a retracted storage position located in close proximity to the load carrier and away from ground underlying and engaging the carrier wheel unit and arranged to cause the rolling load-carrier stabilizer to cooperate with the rolling base to establish a two-wheel hand truck mode to an extended carrier-stabilizer position located in spaced-apart relation to the load carrier and in contact with ground underlying and engaging the carrier wheel unit and arranged to cause the rolling load-carrier stabilizer to cooperate with the rolling base to establish an outrigger-wheel hand truck mode in response to movement of the outrigger wheel unit in an inward direction toward the carrier wheel unitwherein the outrigger-wheel deployment means includes an outrigger-wheel mount foundation coupled to the load carrier and an outrigger-wheel mount coupled to the outrigger wheel unit and mounted to move on and relative to the outrigger-wheel mount foundation to cause the outrigger wheel unit to move in the inward direction toward the carrier wheel unit during movement of the outrigger wheel unit from the retracted storage position to the extended carrier-stabilizer position andwherein the outrigger-wheel mount foundation is coupled to the load carrier of the rolling base for pivotable movement about a first carrier pivot axis during movement of the outrigger wheel unit between the retracted storage position and the extended carrier-stabilizer position. 31. A multi-mode hand truck comprising a rolling base including a load carrier and a carrier wheel unit coupled to the load carriera rolling load-carrier stabilizer including an outrigger wheel unit and outrigger-wheel deployment means for moving the outrigger wheel unit from a retracted storage position located in close proximity to the load carrier and away from ground underlying and engaging the carrier wheel unit and arranged to cause the rolling load-carrier stabilizer to cooperate with the rolling base to establish a two-wheel hand truck mode to an extended carrier-stabilizer position located in spaced-apart relation to the load carrier and in contact with ground underlying and engaging the carrier wheel unit and arranged to cause the rolling load-carrier stabilizer to cooperate with the rolling base to establish an outrigger-wheel hand truck mode in response to movement of the outrigger wheel unit in an inward direction toward the carrier wheel unitwherein the outrigger-wheel deployment means includes an outrigger-wheel mount foundation coupled to the load carrier and an outrigger-wheel mount coupled to the outrigger wheel unit and mounted to move on and relative to the outrigger-wheel mount foundation to cause the outrigger wheel unit to move in the inward direction toward the carrier wheel unit during movement of the outrigger wheel unit from the retracted storage position to the extended carrier-stabilizer positionwherein the rolling load-carrier stabilizer includes an outrigger-wheel mount position retainer configured to provide means for selectively retaining the outrigger-wheel mount in a stationary expanded position relative to the outrigger-wheel mount foundation to cause the outrigger wheel unit to lie a first distance from the carrier wheel unit upon movement of the outrigger wheel unit to assume the retracted storage position to establish the two-wheel hand truck mode and for retaining the outrigger-wheel mount in a stationary contracted position relative to the outrigger-wheel mount foundation to cause the outrigger wheel unit to lie a lesser second distance from the carrier wheel unit upon movement of the outrigger wheel unit to assume the extended carrier-stabilizer position to establish the outrigger-wheel hand truck mode andwherein the outrigger-wheel mount position retainer includes a foundation-anchor receiver coupled to the outrigger-wheel foundation mount and a frame lock unit coupled to the outrigger-wheel mount, the frame lock unit includes a foundation anchor and an anchor mover, the foundation anchor is configured to mate with the foundation-anchor receiver upon movement of the outrigger-wheel mount relative to the outrigger-wheel mount foundation to assume the stationary contracted position to block relative movement of the outrigger-wheel mount and the outrigger-wheel mount foundation and retain the outrigger wheel unit in the extended carrier-stabilizer position to maintain the outrigger-wheel hand truck mode, and the anchor mover is coupled to the outrigger-wheel mount and configured to provide means for moving the foundation anchor relative to the foundation-anchor receiver to separate from the foundation-anchor receiver to free the outrigger-wheel mount to move relative to the outrigger-wheel mount foundation. 32. A multi-mode hand truck comprising a rolling base including a load carrier and a carrier wheel unit coupled to the load carriera rolling load-carrier stabilizer including an outrigger wheel unit and an outrigger-wheel mover coupled to the load carrier and to the outrigger wheel unit, wherein the outrigger-wheel mover includes an extensible wheel-support frame coupled to the load carrier for pivotable movement about a first carrier pivot axis and a pivotable carrier-recline support link coupled to the load carrier for pivotable movement about a second carrier pivot axis and to the extensible wheel-support frame for pivotable movement about a frame mount pivot axis and wherein the outrigger wheel unit is coupled to the extensible wheel-support frame and arranged to move between a retracted storage position near the load carrier and an extended carrier-stabilizer position away from the load carrier during pivoting movement of the extensible wheel-support frame about the first carrier pivot axis and pivoting movement of the pivotable carrier-recline support link about the second carrier pivot axis and the frame mount pivot axis andfurther comprising a base pusher coupled to the load carrier, and wherein the base pusher includes a push handle coupled to the load carrier for slidable movement relative to the load carrier and a pivotable push-handle support link coupled to the load carrier for pivotable movement about a third carrier pivot axis and to the push handle for pivotable movement about a handle mount pivot axis and wherein the push handle is arranged to move relative to the load carrier while slidably coupled to the load carrier between a retracted truck-pusher position arranged to lie alongside the load carrier and an extended cart-pusher position extending upwardly away from the load carrier during pivoting movement of the pivotable push-handle support link about the third carrier pivot axis and the handle mount pivot axis. 33. A multi-mode hand truck comprising a rolling base including a load carrier and a carrier wheel unit coupled to the load carriera rolling load-carrier stabilizer including a foldable stabilizer frame coupled to the load carrier for movement relative to the load carrier between a folded position and an unfolded position, an outrigger wheel unit coupled to the foldable stabilizer frame for movement therewith between a retracted storage position alongside the load carrier and an extended carrier-stabilizer position away from the load carrier, and a frame lock unit coupled to the foldable stabilizer frame and configured to lock the foldable stabilizer frame to the load carrier to retain the outrigger wheel unit in the retracted storage position andwherein the foldable stabilizer frame includes an extensible wheel-support frame including an outrigger-wheel mount coupled to the outrigger wheel unit and an outrigger-wheel mount foundation coupled to the load carrier, the outrigger-wheel mount is coupled to the outrigger-wheel mount foundation for relative movement to lengthen the extensible wheel-support frame upon movement of the outrigger wheel unit to the retracted storage position and to shorten the extensible wheel-support frame upon movement of the outrigger wheel unit to the extended carrier-stabilizer position, and the frame lock unit is coupled to the outrigger-wheel mount to move therewith and formed to include a load carrier anchor configured to mate with the load carrier to retain the outrigger wheel unit in the retracted storage position, a foundation anchor configured to mate with the outrigger-wheel mount foundation to retain the outrigger wheel unit in the extended carrier-stabilizer position, and an anchor mover coupled to the load-carrier anchor and to the foundation anchor to move those anchors relative to the foldable stabilizer frame to free the foldable stabilizer frame for movement relative to the load carrier.
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