IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0060531
(2013-10-22)
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등록번호 |
US-9220943
(2015-12-29)
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발명자
/ 주소 |
- Walker, Andrew Hal
- Tzeng, Yan-Ziun
- Tamara, George Ignatius
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
5 |
초록
A portable platform is disclosed that may be switched from a sliding mode to a stationary mode and back again by retracting or extending pads from the underside of the device. The embodiments may be used for a variety of purposes, including moving heavy objects, and performing fitness routines.
대표청구항
▼
1. A portable platform capable of alternating between a sliding mode and a stationary mode, said platform comprising: (a) a main body having a top side for supporting one or more objects to be slid substantially parallel to a ground, and a bottom side configured to be exposed to the ground;(b) a set
1. A portable platform capable of alternating between a sliding mode and a stationary mode, said platform comprising: (a) a main body having a top side for supporting one or more objects to be slid substantially parallel to a ground, and a bottom side configured to be exposed to the ground;(b) a set of first pads comprising one or more first pads extending from said bottom side and capable of engaging the ground; said set of first pads capable of supporting a weight of said platform and said one or more objects;(c) a set of second pads comprising one or more second pads capable of being extended from said bottom side of said main body and past said set of first pads;(d) wherein said set of second pads is capable of being held in a position past said set of first pads and engaging the ground instead of said set of first pads;(e) wherein said set of second pads is capable of supporting the weight of said platform and said one or more objects;(f) wherein said set of second pads is also capable of being retracted toward said main body of said platform and held in a retracted position such that said set of first pads engage the ground instead of set of said second pads; and(g) wherein one of said sets of pads has a low-friction surface for engaging the ground, and wherein the other of said sets of pads has a high-friction surface for engaging the ground. 2. The platform of claim 1, wherein said platform is capable of switching between said sliding mode and said stationary mode, and locking in one mode or the other, with one primary movement while substantially remaining in contact with the ground. 3. The platform of claim 1, wherein said platform is capable of switching between said sliding mode and said stationary mode, and locking in one mode or the other, with two primary movements while substantially remaining in contact with the ground. 4. The platform of claim 1, wherein said platform is capable of switching between said sliding mode and said stationary mode, and locking in one mode or the other, with three primary movements while substantially remaining in contact with the ground. 5. The platform of claim 1, wherein all of said second pads can be extended simultaneously and retracted simultaneously. 6. The platform of claim 1, wherein said set of second pads has only one of said second pads, and wherein said one second pad is centered in said platform such that it is capable of supporting said platform without said set of first pads engaging the ground when said one second pad is extended, andwherein said one second pad has a screw thread that is rotatably mounted to a corresponding screw thread in said main body of said platform; andwherein rotating said second pad relative to said main body allows retraction and extension of said one second pad. 7. The platform of claim 6 wherein said one second pad has an arm that extends from said one second pad out of a side of said main body; and wherein said arm may be moved to cause said one second pad to rotate relative to said main body. 8. The platform of claim 1, wherein said set of second pads has only one second pad, and wherein said one second pad is centered in said platform such that it is capable of supporting said platform without said set of first pads engaging the ground when said one second pad is extended, andwherein said one second pad is braced against a portion of said main body by a spring element that exerts a force on said one second pad upward from the ground and with sufficient force to prevent said one second pad from moving relative to said main body under the force of gravity; andfurther comprising a handle for pushing downward on said one second pad against the force of said spring element, and further comprising a locking mechanism for holding said one second pad in a position past said set of first pads and in engagement with the ground. 9. The platform of claim 8, wherein said locking mechanism includes a track for said handle in a side of said main body, wherein said track has a projection that will restrain said handle when said handle is pushed past said projection. 10. The platform of claim 1, wherein said set of second pads has only one second pad; wherein said one second pad is centered in said platform such that it is capable of supporting said platform without said set of first pads engaging the ground when said one second pad is extended;wherein said one second pad has a gear track mounted along a side of said one second pad;wherein a gear is provided mounted to said main body of said platform for engaging said gear track to cause said one second pad to move vertically relatively to the ground; andfurther comprising a user-manipulatable knob connected to said gear and accessible from an exterior of said main body. 11. The platform of claim 10, wherein said knob includes a lever projecting from its side, and wherein said main body is provided with a structure for restraining said lever in a fixed position to restrain said knob. 12. The platform of claim 1, wherein the bottom side of said platform is covered by an elastic membrane capable of being stretched outward by extension of said set of second pads; wherein said high and low-friction surfaces are supplied by high and low-friction materials on portions of an outer surface of said membrane that are beneath said first and second sets of pads;wherein the portions of said outer surface of said membrane beneath said first set of pads are supplied with a first friction material, and the outer portions of said membrane beneath said second set of pads are supplied with a second friction material; andwherein one of said first and second friction materials is a high-friction material, and the other is a low-friction material. 13. A portable platform capable of alternating between a sliding mode and a stationary mode, said platform comprising: (a) a main body having a top side for supporting one or more objects to be slid substantially parallel to a ground, and a bottom side configured to be exposed to the ground;(b) a set of first feet comprising one or more first feet extending from said bottom side and capable of engaging the ground; said set of first feet capable of supporting a weight of said platform and said one or more objects;(c) a set of second feet comprising one or more second feet capable of being extended from said bottom side of said main body, said set of second feet capable of supporting the weight of said platform and said one or more objects;(d) wherein one of said sets of feet has low-friction surfaces for engaging the ground, and wherein the other of said sets of feet has high-friction surfaces for engaging the ground. 14. The platform of claim 13, further comprising: (a) a first set of user-manipulatable pushing structures, one for each of said first feet, each of said first set of pushing structures capable of pushing down on a corresponding one of said first feet to cause said one of said first feet to extend away from said bottom side of said platform; and(b) a second set of user-manipulatable pushing structures, one for each of said second feet, each of said second set of pushing structures capable of pushing down on a corresponding one of said second feet to cause said one of said second feet to extend away from said bottom side of said platform. 15. The device of claim 14, wherein said platform has a top portion rotatably mounted on top of said main body, and wherein all of said pushing structures are attached to said top portion; wherein rotating said top portion relative to said main body in one direction will cause all of said first pushing structures to push down on all of said first feet; andwherein rotating said top portion relative to said main body in an opposite direction will cause all of said second pushing structures to push down on all of said second feet. 16. The device of claim 13, in which each of said first feet is paired with one of said second feet, and wherein each of said pairs shares a single pushing structure; wherein rotating said top portion relative to said main body in one direction will cause all of said single pushing structures to push down on all of said first feet; andwherein rotating said top portion relative to said main body in an opposite direction will cause all of said single pushing structures to push down on all of said second feet. 17. The device of claim 13, wherein the bottom side of said platform is covered by an elastic membrane capable of being stretched outward by extension of said feet; wherein said high and low-friction surfaces are supplied by high and low-friction materials on portions of an outer surface of said membrane that are beneath said feet;wherein the portion of said outer surface of said membrane beneath at least one of said feet is supplied with a first friction material, and the portion of said outer surface of said membrane beneath at least one other of said feet is supplied with a second friction material; andwherein one of said first and second friction materials is a high-friction material, and the other is a low-friction material. 18. A method by which a person can perform a fitness routine comprising: (a) providing a portable platform capable of alternating between a sliding mode and a stationary mode, said platform comprising: (A) a main body having a top side for supporting one or more objects to be slid substantially parallel to a ground, and a bottom side configured to be exposed to the ground;(B) a set of first pads comprising one or more first pads extending from said bottom side and capable of engaging the ground; said set of first pads capable of supporting a weight of said platform and said one or more objects;(C) a set of second pads comprising one or more second pads extending from said bottom side and capable of engaging the ground; said set of second pads capable of supporting the weight of said platform and said one or more objects;(D) wherein one of said sets of pads has a low-friction surface for engaging the ground, and wherein the other of said sets of pads has a high-friction surface for engaging the ground;(b) said person causing said one of said sets of pads that has a low-friction surface to engage the ground;(c) said person placing part of their body on said top side of said platform and said person applying a force to slide said platform relative to the ground while said platform bears at least part of said person's weight;(d) said person causing said one of said sets of pads that has a high-friction surface to engage the ground; and(e) said person placing part of their body on said top side of said platform and said person performing a fitness exercise that includes bearing at least part of their weight on said platform. 19. The method of claim 18, further comprising providing said set of second pads with the ability to extend from said bottom side of said main body and past said set of first pads; said set of second pads being capable of being held in a position past said set of first pads and engaging the ground instead of said set of first pads; said set of second pads also capable of being retracted toward said main body of said platform and held in a retracted position such that said set of first pads engage the ground instead of said set of second pads. 20. The method of claim 18, further comprising providing the bottom side of said platform with an elastic membrane capable of being stretched outward by extension of said sets of pads; wherein said high and low-friction surfaces are supplied by high and low-friction materials on portions of an outer surface of said membrane that are beneath said sets of pads;wherein the portion of said outer surface of said membrane beneath said set of first pads is supplied with a first friction material, and the portion of said outer surface of said portion of said membrane beneath said set of second pads is supplied with a second friction material; andwherein one of said first and second friction materials is a high-friction material, and the other is a low-friction material.
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