대표
청구항
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1. A foldable light duty cart adopted to carry items such as beach chairs, coolers, towels, blankets and food stuffs comprising: a main-frame structure including opposing rigid main-frame side frame members with at least one rigid main-frame cross bar member spanning the main-frame side members;a wheel system rotatably mounted near bottom portions of said main-frame side members;a panel attached between said main-frame side members;a pivotally mounted upper framework which is pivotally attached to said main-frame side members, including opposing rigid up...
1. A foldable light duty cart adopted to carry items such as beach chairs, coolers, towels, blankets and food stuffs comprising: a main-frame structure including opposing rigid main-frame side frame members with at least one rigid main-frame cross bar member spanning the main-frame side members;a wheel system rotatably mounted near bottom portions of said main-frame side members;a panel attached between said main-frame side members;a pivotally mounted upper framework which is pivotally attached to said main-frame side members, including opposing rigid upper framework side frame elements and at least one rigid upper framework cross bar element spanning said upper framework side elements;a pivotally mounted lower frame stand which is pivotally attached to said main-frame side members, said lower frame stand having first and second frame stand segments;said first frame stand segment pivotally attached to said main-frame side members, including opposing rigid first frame stand side supports and at least one first frame stand cross bar support therebetween;said second frame stand segment pivotally attached to said first frame stand segment at said first frame stand side supports, said second frame stand segment including opposing rigid second frame stand legs;a lower swivel lock having body, a frame channel and channel side walls, the lower swivel channel side walls pivotally attached to one of said main-frame side members and said lower swivel body attached to an adjacent first frame stand side support, the lower swivel frame channel capturing said main-frame side member therein when said lower frame stand and the first frame stand segment is substantially perpendicular to said main-frame side member in a fully extended position, and, when said main-frame side member is not captured in said lower swivel frame channel, said lower frame stand is adapted to swing to a collapsed position near said main-frame side member, said lower swivel frame channel having at least one lower swivel detent therein to capture and lock said main-frame side member when in said fully extended position;a stand swivel lock having a body, a frame channel and channel side walls, the stand swivel channel side walls pivotally attached to one of said first frame stand side supports and said stand swivel body attached to an adjacent second frame stand leg, the stand swivel frame channel capturing said first frame stand side support therein when said second frame stand segment is substantially perpendicular to said first frame stand side support and in a fully extended cart-standing position, and, when said first frame stand side support is not captured in said stand swivel frame channel, said second frame stand segment is adapted to swing to a collapsed position, said stand swivel frame channel having at least one stand swivel detent therein to capture and lock said first frame stand side support when in said fully extended position;an off center swing hinge lock system between one of said main-frame side members and an adjacent upper framework side element;a lower swing arm safety latch system between one of said first frame stand side supports and an adjacent main-frame side member, said lower swing arm latch having a swing arm with a catch mouth at one end thereof and the other end thereof pivotally mounted to said one of said first frame stand side supports, a pin on said adjacent main-frame side member at a location such that upon rotation of said swing arm, said catch mouth accepts and retains said pin therein and said lower swing arm latches said first frame stand to said main-frame to maintain said first frame stand in said fully extended position with respect to said main-frame. 2. A foldable light duty cart as claimed in claim 1, wherein said off center swing hinge lock system includes a first hinge arm and a second hinge arm respectively pivotally coupled to said upper framework side element and said main-frame side member, said first and second hinge arms pivotally attached to each other at an arm pivot point;said first hinge arm having a stop and said second hinge arm having an edge, said stop coacting with said edge and forming an off center hinge lock when said first and second hinge arms are fully extended in a locked position and said arm pivot point being inboard with respect to an imaginary line through the pivotal coupling of said first hinge arm and said upper framework side element and the pivotal coupling of said second hinge arm and said main-frame side member. 3. A foldable light duty cart as claimed in claim 2, wherein when said off center swing hinge lock system is in a locked position, said arm pivot point is closer to said pivotal attachment between said main-frame side member and said upper framework side element than when said off center swing hinge is in an unlocked position. 4. A foldable light duty cart as claimed in claim 3, wherein in said fully extended and locked position, said first and second hinge arms are extended generally linearly with respect to each other, and in a second collapsed position said first and second hinge arms are collapsed and are generally adjacent to each other, said stop defined as a lip on an edge of said first hinge arm,said arm pivot point being spaced away from said lip,said first hinge arm including an a first detent,said second hinge arm having a second detent complementary to said first detent,said first and second detents interlocking and said second hinge arm edge abutting said lip when said first hinge arm and second hinge arm is fully extended in a locked position. 5. A foldable light duty cart as claimed in claim 1 wherein said wheel system comprises a pair of wheels, a respective wheel of said pair of wheels rotatably mounted near a terminal bottom end of each of said main-frame side members. 6. A foldable light duty cart as claimed in claim 1 wherein said main-frame side members and said main-frame cross member partly enclose a cart space and said panel covers a portion of said enclosed cart space, said panel is one of a cloth panel, a rigid panel and a flexible panel. 7. A foldable light duty cart as in claim 1, wherein first frame stand segment has a collapsed position when said first frame stand side supports are rotated to a collapsed position adjacent to said main-frame side members. 8. A foldable light duty cart as in claim 1, wherein second frame stand segment has a collapsed position when said second frame stand side legs are rotated to a collapsed position adjacent to said first frame stand side supports. 9. A foldable light duty cart as in claim 1, wherein second frame stand segment includes either: two second stand frame stand legs with a frame stand cross bar; ora U-shaped structure formed by said opposing second frame stand legs and a frame stand cross bar therebetween distal to said stand swivel joining said second frame stand legs and said first frame stand. 10. A foldable light duty cart as in claim 1, wherein said lower swivel lock comprises a soft lock wherein said lower swivel frame channel is resilient, and said lower swivel frame channel carrying said lower swivel detent defines a channel mouth which is smaller than a cross-sectional dimension of said main-frame side members such that in said fully extended position, said main-frame side member is locked into said lower swivel frame channel with said lower swivel detent. 11. A foldable light duty cart as in claim 1, wherein said stand swivel lock comprises a soft lock wherein said stand swivel frame channel is resilient, and said stand swivel frame channel carrying said stand swivel detent defines a channel mouth which is smaller than a cross-sectional dimension of said first stand side supports such that in said fully extended position, said first stand side support is locked into said stand swivel frame channel with said stand swivel detent. 12. A foldable light duty cart as claimed in claim 1 wherein said lower swivel body is compressibly resilient, and wherein said latch capture mouth of said lower swing arm safety latch system further includes a latch tooth defined by the said capture mouth and a latch capture throat thereat,said capture mouth of said swing arm is sized so that said latch pin can pass through said mouth and over said latch tooth only if said latch tooth generates a force during a locking operation normal to an axial centerline through said lower swivel frame channel which compresses said lower swivel body. 13. A foldable light duty cart as claimed in claim 1, wherein the cart has a pouch attached to said panel. 14. A foldable light duty cart as claimed in claim 1, wherein said main-frame cross member is located between co-extensive terminal ends of said main-frame side members, opposite said wheel system, said cart including a cushioned sleeve about said main-frame cross member. 15. A foldable light duty cart as claimed in claim 1, wherein lower swivel frame channel has two inwardly depending lower swivel detents on each opposing sides of said lower swivel frame channel to capture said main-frame side member therein. 16. A foldable light duty cart as claimed in claim 1, wherein stand swivel frame channel has two inwardly depending stand swivel detents on each opposing sides of said stand swivel frame channel to capture said first frame stand side support therein. 17. A foldable light duty cart as in claim 1, wherein said first frame stand segment further includes multiple first frame stand cross bar supports. 18. A foldable light duty cart as claimed in claim 1, wherein said first frame stand segment includes a plurality of rigid auxiliary frame supports spanning said multiple first frame stand cross bar supports. 19. A foldable light duty cart as claimed in claim 1, wherein said cart has two said lower swivel locks, two said stand swivel locks, two said off center swing hinge lock systems, and two said lower swing arm safety latch systems. 20. A foldable light duty cart as claimed in claim 4 wherein said wheel system comprises a pair of wheels, a respective wheel of said pair of wheels rotatably mounted near a terminal bottom end of each of said main-frame side members. 21. A foldable light duty cart as claimed in claim 20 wherein said main-frame side members and said main-frame cross member partly enclose a cart space and said panel covers a portion of said enclosed cart space, said panel is one of a cloth panel, a rigid panel and a flexible panel. 22. A foldable light duty cart as in claim 21, wherein first frame stand segment has a collapsed position when said first frame stand side supports are rotated to a collapsed position adjacent to said main-frame side members, second frame stand segment has a collapsed position when said second frame stand side legs are rotated to a collapsed position adjacent to said first frame stand side supports, and second frame stand segment includes either: two second frame stand legs with a frame stand cross bar; ora U-shaped structure formed by said opposing second frame stand legs and a frame stand cross bar therebetween distal to said stand swivel joining said second frame stand legs and said first frame stand. 23. A foldable light duty cart as in claim 22, wherein said lower swivel lock comprises a soft lock wherein said lower swivel frame channel is resilient, and said lower swivel frame channel carrying said detent defines a channel mouth which is smaller than a cross-sectional dimension of said main-frame side members such that in said fully extended position, said main-frame side member is locked into said lower swivel frame channel with said detent, said stand swivel lock comprises a soft lock wherein said stand swivel frame channel is resilient, and said stand swivel frame channel carrying said detent defines a channel mouth which is smaller than a cross-sectional dimension of said first stand side supports such that in said fully extended position, said first stand side support is locked into said stand swivel frame channel with said detent, and said lower swivel body is compressibly resilient, and wherein said latch capture mouth of said lower swing arm safety latch system further includes a latch tooth defined by the said capture mouth and a latch capture throat thereat,said capture mouth of said swing arm is sized so that said latch pin can pass through said mouth and over said latch tooth only if said latch tooth generates a force during a locking operation normal to an axial centerline through said lower swivel frame channel which compresses said lower swivel body. 24. A foldable light duty cart as claimed in claim 23, wherein said main-frame cross member is located between co-extensive terminal ends of said main-frame side members, opposite said wheel system, said cart including a cushioned sleeve about said main-frame cross member. 25. A foldable light duty cart as claimed in claim 24, wherein lower swivel frame channel has two inwardly depending detents on each opposing sides of said lower swivel frame channel to capture said main-frame side member therein, and stand swivel frame channel has two inwardly depending detents on each opposing sides of said stand swivel frame channel to capture said first frame stand side support therein. 26. A foldable light duty cart adopted to carry items such as beach chairs, coolers, towels, blankets and food stuffs comprising: a main-frame structure including opposing rigid main-frame side frame members with at least one rigid main-frame cross bar member spanning the main-frame side members;a wheel system rotatably mounted near bottom portions of said main-frame side members;a panel attached between said main-frame side members;a pivotally mounted upper framework which is pivotally attached to said main-frame side members, including opposing rigid upper framework side frame elements and at least one rigid upper framework cross bar element spanning said upper framework side elements;a pivotally mounted lower frame stand which is pivotally attached to said main-frame side members, said lower frame stand having first and second frame stand segments;said first frame stand segment pivotally attached to said main-frame side members, including opposing rigid first frame stand side supports and at least one first frame stand cross bar support therebetween;said second frame stand segment pivotally attached to said first frame stand segment at said first frame stand side supports, said second frame stand segment including opposing rigid second frame stand legs;a lower swivel lock having body, a frame channel and channel side walls, the lower swivel channel side walls pivotally attached to one of said main-frame side members and said lower swivel body attached to an adjacent first frame stand side support, the lower swivel frame channel capturing said main-frame side member therein when said lower frame stand and the first frame stand segment is substantially perpendicular to said main-frame side member in a fully extended position, and, when said main-frame side member is not captured in said lower swivel frame channel, said lower frame stand is adapted to swing to a collapsed position near said main-frame side member;a stand swivel lock having a body, a frame channel and channel side walls, the stand swivel channel side walls pivotally attached to one of said first frame stand side supports and said stand swivel body attached to an adjacent second frame stand leg, the stand swivel frame channel capturing said first frame stand side support therein when said second frame stand segment is substantially perpendicular to said first frame stand side support and in a fully extended cart-standing position, and, when said first frame stand side support is not captured in said stand swivel frame channel, said second frame stand segment is adapted to swing to a collapsed position;an off center swing hinge lock system between one of said main-frame side members and an adjacent upper framework side element;a lower swing arm safety latch system between one of said first frame stand side supports and an adjacent main-frame side member, said lower swing arm latch having a swing arm with a catch mouth at one end thereof and the other end thereof pivotally mounted to said one of said first frame stand side supports, a pin on said adjacent main-frame side member at a location such that upon rotation of said swing arm, said catch mouth accepts and retains said pin therein and said lower swing arm latches said first frame stand to said main-frame to maintain said first frame stand in said fully extended position with respect to said main-frame,said off center swing hinge lock system includes a first hinge arm and a second hinge arm respectively pivotally coupled to said upper framework side element and said main-frame side member,said first and second hinge arms pivotally attached to each other at an arm pivot point,said first hinge arm having a stop and said second hinge arm having an edge, said stop coacting with said edge and forming an off center hinge lock when said first and second hinge arms are fully extended in a locked position and said arm pivot point being inboard with respect to an imaginary line through the pivotal coupling of said first hinge arm and said upper framework side element and the pivotal coupling of said second hinge arm and said main-frame side member. 27. A foldable light duty cart as claimed in claim 26, wherein when said off center swing hinge lock system is in a locked position, said arm pivot point is closer to said pivotal attachment between said main-frame side member and said upper framework side element than when said off center swing hinge is in an unlocked position. 28. A foldable light duty cart as claimed in claim 27, wherein in said fully extended and locked position, said first and second hinge arms are extended generally linearly with respect to each other, and in a second collapsed position said first and second hinge arms are collapsed and are generally adjacent to each other, said stop defined as a lip on an edge of said first hinge arm,said arm pivot point being spaced away from said lip,said first hinge arm including an a first detent,said second hinge arm having a second detent complementary to said first detent,said first and second detents interlocking and said second hinge arm edge abutting said lip when said first hinge arm and second hinge arm is fully extended in a locked position. 29. A foldable light duty cart as claimed in claim 28 wherein said wheel system comprises a pair of wheels, a respective wheel of said pair of wheels rotatably mounted near a terminal bottom end of each of said main-frame side members. 30. A foldable light duty cart as claimed in claim 29 wherein said main-frame side members and said main-frame cross member partly enclose a cart space and said panel covers a portion of said enclosed cart space, said panel is one of a cloth panel, a rigid panel and a flexible panel. 31. A foldable light duty cart as in claim 30, wherein first frame stand segment has a collapsed position when said first frame stand side supports are rotated to a collapsed position adjacent to said main-frame side members, second frame stand segment has a collapsed position when said second frame stand side legs are rotated to a collapsed position adjacent to said first frame stand side supports, and second frame stand segment includes either: two second frame stand legs with a frame stand cross bar; ora U-shaped structure formed by said opposing second frame stand legs and a frame stand cross bar therebetween distal to said stand swivel joining said second frame stand legs and said first frame stand. 32. A foldable light duty cart as in claim 31, wherein said lower swivel lock comprises: a soft lock wherein said lower swivel frame channel is resilient, and said lower swivel frame channel having at least one detent therein to capture and lock said main-frame side member when in said fully extended position, said lower swivel detent defines a channel mouth which is smaller than a cross-sectional dimension of said main-frame side members such that in said fully extended position, said main-frame side member is locked into said lower swivel frame channel with said lower swivel detent; said stand swivel lock comprises a soft lock wherein said stand swivel frame channel is resilient, and said stand swivel frame channel having at least one detent therein to capture and lock said first frame stand side support when in said second frame stand segment is in a fully extended position, said stand swivel detent defines a channel mouth which is smaller than a cross-sectional dimension of said first stand side supports such that in fully extended position, said first stand side support is locked into said stand swivel frame channel with said stand swivel detent;said lower swivel body is compressibly resilient, and wherein said latch capture mouth of said lower swing arm safety latch system further includesa latch tooth defined by the said capture mouth and a latch capture throat thereat,said capture mouth of said swing arm is sized so that said latch pin can pass through said mouth and over said latch tooth only if said latch tooth generates a force during a locking operation normal to an axial centerline through said lower swivel frame channel which compresses said lower swivel body. 33. A foldable light duty cart as claimed in claim 32, wherein said main-frame cross member is located between co-extensive terminal ends of said main-frame side members, opposite said wheel system, said cart including a cushioned sleeve about said main-frame cross member. 34. A foldable light duty cart as claimed in claim 33, wherein lower swivel frame channel has two inwardly depending lower swivel detents on each opposing sides of said lower swivel frame channel to capture said main-frame side member therein, and stand swivel frame channel has two inwardly depending stand swivel detents on each opposing sides of said stand swivel frame channel to capture said first frame stand side support therein. 35. A foldable light duty cart as in claim 34, wherein said first frame stand segment further includes multiple first frame stand cross bar supports. 36. A foldable light duty cart as claimed in claim 35, wherein said first frame stand segment includes a plurality of rigid auxiliary frame supports spanning said multiple first frame stand cross bar supports. 37. A foldable light duty cart as claimed in claim 36, wherein said cart has two said lower swivel locks, two said stand swivel locks, two said off center swing hinge lock systems, and two said lower swing arm safety latch systems. 38. A foldable light duty cart adopted to carry items such as beach chairs, coolers, towels, blankets and food stuffs comprising: a main-frame structure including opposing rigid main-frame side frame members with at least one rigid main-frame cross bar member spanning the main-frame side members;a wheel system rotatably mounted near bottom portions of said main-frame side members;a pivotally mounted upper framework which is pivotally attached to said main-frame side members, including opposing rigid upper framework side frame elements and at least one rigid upper framework cross bar element spanning said upper framework side elements;a pivotally mounted lower frame stand which is pivotally attached to said main-frame side members, said lower frame stand having first and second frame stand segments;said first frame stand segment pivotally attached to said main-frame side members, including opposing rigid first frame stand side supports and at least one first frame stand cross bar support therebetween;said second frame stand segment pivotally attached to said first frame stand segment at said first frame stand side supports, said second frame stand segment including opposing rigid second frame stand legs;a lower swivel lock having body, a frame channel and channel side walls, the lower swivel channel side walls pivotally attached to one of said main-frame side members and said lower swivel body attached to an adjacent first frame stand side support, the lower swivel frame channel capturing said main-frame side member therein when said lower frame stand and the first frame stand segment is substantially perpendicular to said main-frame side member in a fully extended position, and, when said main-frame side member is not captured in said lower swivel frame channel, said lower frame stand is adapted to swing to a collapsed position near said main-frame side member, said lower swivel frame channel having at least one detent therein to capture and lock said main-frame side member when in said fully extended position;a stand swivel lock having a body, a frame channel and channel side walls, the stand swivel channel side walls pivotally attached to one of said first frame stand side supports and said stand swivel body attached to an adjacent second frame stand leg, the stand swivel frame channel capturing said first frame stand side support therein when said second frame stand segment is substantially perpendicular to said first frame stand side support and in a fully extended cart-standing position, and, when said first frame stand side support is not captured in said stand swivel frame channel, said second frame stand segment is adapted to swing to a collapsed position, said stand swivel frame channel having at least one detent therein to capture and lock said first frame stand side support when in said fully extended position;an off center swing hinge lock system between one of said main-frame side members and an adjacent upper framework side element;a lower swing arm safety latch system between one of said first frame stand side supports and an adjacent main-frame side member, said lower swing arm latch having a swing arm with a catch mouth at one end thereof and the other end thereof pivotally mounted to said one of said first frame stand side supports, a pin on said adjacent main-frame side member at a location such that upon rotation of said swing arm, said catch mouth accepts and retains said pin therein and said lower swing arm latches said first frame stand to said main-frame to maintain said first frame stand in said fully extended position with respect to said main-frame.
