IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0716483
(2007-03-09)
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등록번호 |
US-7854444
(2011-02-14)
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발명자
/ 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
11 인용 특허 :
7 |
초록
▼
A convertible cart capable of being converted into a Bellman luggage cart, platform cart, or dolly cart. The convertible cart includes: (a) a platform having a third width, W3, (b) a first frame having a first width, W1, detachably coupled to the platform at a first position, (c) a second frame havi
A convertible cart capable of being converted into a Bellman luggage cart, platform cart, or dolly cart. The convertible cart includes: (a) a platform having a third width, W3, (b) a first frame having a first width, W1, detachably coupled to the platform at a first position, (c) a second frame having a second width, W2, detachably coupled to the platform at a second position apart from the first position, (d) first coupling connector configured to detachably engage the first and second frame, respectively, with the platform, (e) a third frame having two ends detachably coupled to the first and second frame, respectively, (f) second coupling connector means detachably engage the third frame with the first and the second frame, respectively, and (g) a plurality of wheels operable mounted to the platform, in which W3>W2>W1.
대표청구항
▼
What is claimed is: 1. A convertible cart comprising: a. a base frame; b. a platform having a body portion defined by a first end, an opposite, second end, a first side and an opposite, second side, wherein the body portion has a top surface and a bottom surface and a width, W3, defined by the firs
What is claimed is: 1. A convertible cart comprising: a. a base frame; b. a platform having a body portion defined by a first end, an opposite, second end, a first side and an opposite, second side, wherein the body portion has a top surface and a bottom surface and a width, W3, defined by the first side and the second side, and is detachably mounted on the base frame; c. a first frame having a first support member, a second support member, and a top support member connected to the first and second support members at its ends, respectively, such that the first support member and the second support member are substantially parallel to each other and define a width, W1, there between, wherein the first frame is detachably coupled to the body portion of the platform adjacent to the first end thereof such that when the first frame is at a vertical position, the first support member and the second support member are substantially perpendicular to the body portion and the top support member is apart from the top surface of the body portion in a distance l1; d. a second frame having a first support member, a second support member, and a top support member connected to the first and second support members at its ends, respectively, such that the first support member and the second support member are substantially parallel to each other and define a width, W2 there between, wherein the second frame is detachably coupled to the body portion of the platform adjacent to the second end thereof such that when the second frame is at a vertical position, the first support member and the second support member are substantially perpendicular to the body portion and the top support member is apart from the top surface of the body portion in a distance l2; e. a plurality of first coupling connectors each configured to detachably engage a corresponding one of the first support member and the second support member of the first frame, and the first support member and the second support member of the second frame, respectively, with the platform; f. a third frame having a first support member, a second support member, and a top support member connected to the first and second support members at its ends, respectively, such that the first support member and the second support member are substantially parallel to each other, wherein the first support member is detachably coupled to the first frame, and the second support member is detachably coupled to the second frame, respectively, such that the top support member of the third frame is substantially perpendicular to the top support member of the first frame and the top support member of the second frame; g. a pair of second coupling connectors, wherein one of the pair of second coupling connectors is configured to detachably engage the first support member of the third frame with the top support member of the first frame, and the other of the pair of second coupling connectors is configured to detachably engage the second support member of the third frame with the top support member of the second frame, respectively; and h. a plurality of wheels operable mounted to the base frame, wherein W3>W2>W1 and l1 and l2 are substantially equal, wherein each of the plurality of first coupling connectors comprises a 2-way T connector, a 3-way T connector, or any combinations thereof, wherein each of the plurality of first coupling connectors comprises a first shaft and a second shaft perpendicularly coupled to the first shaft, and wherein the first shaft is configured to detachably engage a corresponding one of the first and second support members of the first frame and second frame that are in a vertical, erected position, respectively, and the second shaft is configured to detachably engage a corresponding one of the first and second support members of the first and second frames, that are in a horizontal, non-erected position, respectively, wherein the first shaft has at least a part of its body portion penetrated through the platform and the base frame, and wherein the body portion of the first shaft penetrated through the platform comprises a helical groove or thread formed on a surface thereof. 2. A convertible cart comprising: a. a base frame; b. a platform having a body portion defined by a first end, an opposite, second end, a first side and an opposite, second side, wherein the body portion has a top surface and a bottom surface and a width, W3, defined by the first side and the second side, and is detachably mounted on the base frame; c. a first frame having a first support member, a second support member, and a top support member connected to the first and second support members at its ends, respectively, such that the first support member and the second support member are substantially parallel to each other and define a width, W1, there between, wherein the first frame is detachably coupled to the body portion of the platform adjacent to the first end thereof such that when the first frame is at a vertical position, the first support member and the second support member are substantially perpendicular to the body portion and the top support member is apart from the top surface of the body portion in a distance l1; d. a second frame having a first support member, a second support member, and a top support member connected to the first and second support members at its ends, respectively, such that the first support member and the second support member are substantially parallel to each other and define a width, W2 there between, wherein the second frame is detachably coupled to the body portion of the platform adjacent to the second end thereof such that when the second frame is at a vertical position, the first support member and the second support member are substantially perpendicular to the body portion and the top support member is apart from the top surface of the body portion in a distance l2; e. a plurality of first coupling connectors each configured to detachably engage a corresponding one of the first support member and the second support member of the first frame, and the first support member and the second support member of the second frame, respectively, with the platform; f. a third frame having a first support member, a second support member, and a top support member connected to the first and second support members at its ends, respectively, such that the first support member and the second support member are substantially parallel to each other, wherein the first support member is detachably coupled to the first frame, and the second support member is detachably coupled to the second frame, respectively, such that the top support member of the third frame is substantially perpendicular to the top support member of the first frame and the top support member of the second frame; g. a pair of second coupling connectors, wherein one of the pair of second coupling connectors is configured to detachably engage the first support member of the third frame with the top support member of the first frame, and the other of the pair of second coupling connectors is configured to detachably engage the second support member of the third frame with the top support member of the second frame, respectively; and h. a plurality of wheels operable mounted to the base frame, wherein W3>W2>W1 and l1 and l2 are substantially equal, wherein each of the plurality of first coupling connectors comprises a 2-way T connector, a 3-way T connector, or any combinations thereof, wherein each of the plurality of first coupling connectors comprises a first shaft and a second shaft perpendicularly coupled to the first shaft, and wherein the first shaft is configured to detachably engage a corresponding one of the first and second support members of the first frame and second frame that are in a vertical, erected position, respectively, and the second shaft is configured to detachably engage a corresponding one of the first and second support members of the first and second frames, that are in a horizontal, non-erected position, respectively, and wherein the first shaft of each of the plurality of first coupling connectors comprises a first body portion defined by a first end and an opposite, second end, and the second shaft comprises a second body portion defined by a first side and a second, opposite side, each of the first body portion and the second body portion having a first channel and a second channel, formed at the center thereof so as to detachably engage a corresponding one of the first and second support members of the first frame and the second frame, respectively. 3. The convertible cart of claim 2, wherein the first channel extends from its first end to its second end of the first shaft, and the second channel extends from its first side to its second side of each of the second shafts. 4. The convertible cart of claim 2, wherein each of the pair of second coupling connectors comprises a body portion defined by a first end and an opposite, second end, each body portion of the pair of second coupling connectors, having a respective channel configured to detachably engage a corresponding one of the first support member and second support member of the third frame, respectively. 5. The convertible cart of claim 2, wherein the first frame and the second frame are erectable to corresponding vertical positions from the base frame, and the third frame is erectable to a corresponding vertical position from the first frame and the second frame so as to form a luggage cart. 6. The convertible cart of claim 2, wherein each of the plurality of first coupling connectors is held in place by a corresponding nut. 7. The convertible cart of claim 2, wherein the first, second, and top support members of the first frame form an integral frame. 8. The convertible cart of claim 2, wherein the first, second, and top support members of the second frame form an integral frame. 9. The convertible cart of claim 2, wherein the first, second, and top support members of the third frame form an integral frame. 10. The convertible cart of claim 2, wherein the plurality of wheels comprises at least three wheels. 11. A convertible cart comprising: a. a platform having a body portion with a width, W3; b. a first frame having a first support member, a second support member, and a top support member connecting the first and second support members, wherein the first support member and the second support member are substantially parallel to each other and define a width, W1, there between, and wherein the first frame is detachably coupled to the body portion of the platform; c. a second frame having a first support member, a second support member, and a top support member connecting the first and second support members, wherein the first support member and the second support member are substantially parallel to each other and define a width, W2, there between, and wherein the second frame is detachably coupled to the body portion of the platform at a position apart from where the first frame is detachably coupled to the body portion of the platform; d. a plurality of first coupling connectors configured to detachably engage a corresponding one of the first support member and the second support member of the first frame, and the first support member and the second support member of the second frame, respectively, with the platform; e. a third frame having a first support member, a second support member, and a top support member connecting the first and second support members, wherein the first support member is detachably coupled to the first frame, and the second support member is detachably coupled to the second frame, respectively; f. a pair of second coupling connectors, wherein one of the pair of second coupling connectors is configured to detachably engage the first support member of the third frame with the first frame, and the other of the pair of second coupling connectors is configured to detachably engage the second support member of the third frame with the second frame, respectively; and g. a plurality of wheels operable mounted to the platform, wherein W3>W2>W1, wherein each of the plurality of first coupling connectors comprises one of a 2-way T connector and a 3-way T connector, wherein the plurality of first coupling connectors comprises a first shaft and a second shaft perpendicularly connected to the first shaft, and wherein the first shaft is configured to detachably engage a corresponding one of the first and second support members of the first and second frames, when the frames are in a vertical, erected position, respectively, and the second shaft is configured to detachably engage a corresponding one of the first and second support members of the first and second frames, when the frames are in a horizontal, non-erected position, respectively, wherein the first shaft of the plurality of first coupling connectors has at least a part of its body portion penetrate through the body portion of the platform, and wherein the body portion of the first shaft of the plurality of first coupling connectors penetrating through the platform comprises a helical groove or thread formed on surface thereof. 12. A convertible cart comprising: a. a platform having a body portion with a width, W3; b. a first frame having a first support member, a second support member, and a top support member connecting the first and second support members, wherein the first support member and the second support member are substantially parallel to each other and define a width, W1, there between, and wherein the first frame is detachably coupled to the body portion of the platform; c. a second frame having a first support member, a second support member, and a top support member connecting the first and second support members, wherein the first support member and the second support member are substantially parallel to each other and define a width, W2, there between, and wherein the second frame is detachably coupled to the body portion of the platform at a position apart from where the first frame is detachably coupled to the body portion of the platform; d. a plurality of first coupling connectors configured to detachably engage a corresponding one of the first support member and the second support member of the first frame, and the first support member and the second support member of the second frame, respectively, with the platform; e. a third frame having a first support member, a second support member, and a top support member connecting the first and second support members, wherein the first support member is detachably coupled to the first frame, and the second support member is detachably coupled to the second frame, respectively; f. a pair of second coupling connectors, wherein one of the pair of second coupling connectors is configured to detachably engage the first support member of the third frame with the first frame, and the other of the pair of second coupling connectors is configured to detachably engage the second support member of the third frame with the second frame, respectively; and g. a plurality of wheels operable mounted to the platform, wherein W3>W2>W1, wherein each of the plurality of first coupling connectors comprises one of a 2-way T connector and a 3-way T connector, wherein the plurality of first coupling connectors comprises a first shaft and a second shaft perpendicularly connected to the first shaft, and wherein the first shaft is configured to detachably engage a corresponding one of the first and second support members of the first and second frames, when the frames are in a vertical, erected position, respectively, and the second shaft is configured to detachably engage a corresponding one of the first and second support members of the first and second frames, when the frames are in a horizontal, non-erected position, respectively, and wherein the first shaft of the plurality of first coupling connectors comprises a body portion defined by a first end and an opposite, second end, and the second shaft comprises a body portion defined by a first side and an opposite, second side, each body portion of the first shaft and the second shaft having a respective channel formed at the center thereof so as to detachably engage a corresponding one of the first and second support members of the first and the second frames, respectively. 13. The convertible cart of claim 12, wherein the first channel extends from the first end to the second end of the body portion of the first shaft, and the second channel extends from the first side to the second side of the body portion of the second shaft. 14. The convertible cart of claim 12, wherein each of the pair of second coupling connectors comprises a body portion defined by a first end and an opposite, second end, each body portion of the pair of second coupling connectors having a respective channel configured to detachably engage a corresponding one of the first and second support members, of the third frame, respectively. 15. The convertible cart of claim 12, wherein the first frame, the second frame and third frame are erectable to corresponding vertical positions so as to form a luggage cart. 16. The convertible cart of claim 12, wherein the plurality of first coupling connectors is held in place by a plurality of nuts. 17. The convertible cart of claim 12, wherein the first support member, the second support member, and the top support member of the first frame form an integral frame. 18. The convertible cart of claim 12, wherein the first support member, the second support member, and the top support member of the second frame form an integral frame. 19. The convertible cart of claim 12, wherein the first support member, the second support member, and the top support member of the third frame form an integral frame. 20. The convertible cart of claim 12, wherein the plurality of wheels comprises at least three wheels. 21. A convertible cart comprising: a. a platform having a width, W3; b. a first frame having a width, W1, and detachably coupled to the platform at a first position; c. a second frame having a width, W2, and detachably coupled to the platform at a second position apart from the first position; d. a plurality of first coupling connectors configured to detachably engage the first frame and the second frame, respectively, with the platform; e. a third frame having two ends detachably coupled to the first frame and the second frame, respectively; f. a pair of second coupling connectors detachably engage the third frame with the first frame and the second frame, respectively; and g. a plurality of wheels operable mounted to the platform, wherein W3>W2>W1, wherein each of the plurality of first coupling first coupling connectors comprises one of a 2-way T connector and a 3-way T connector, wherein the plurality of first coupling connectors comprises a first shaft and a second shaft perpendicularly connected to the first shaft, and wherein the first shaft is configured to detachably engage a corresponding one of the first frame and second frame when both frames are in a vertical, erected position, respectively, and the second shaft is configured to detachably engage a corresponding one of the first frame and second frame when both frames are in a horizontal, non-erected position, respectively, wherein the first shaft of plurality of first coupling connectors has at least a part of its body portion penetrate through the platform. wherein the body portion of the first shaft of the plurality of first coupling connectors penetrating through the platform comprises a helical groove or a thread formed on surface thereof 22. The convertible cart of claim 21, wherein the first shaft of the plurality of first coupling connectors comprises a body portion defined by a first end and an opposite, second end, and the second shaft comprises a body portion defined by a first side and a second, opposite side, each body portion of the first shaft and the second shaft having a respective channel formed at the center thereof so as to detachably engage a corresponding one of the first frame and the second frame, respectively. 23. The convertible cart of claim 22, wherein the first channel of the first shaft extends from the first end to the second end of the body portion of the first shaft of the plurality of first coupling connectors, and the second channel of the second shaft extends from the first side to the second side of the body portion of the second shaft of the plurality of first coupling connectors. 24. The convertible cart of claim 21, wherein the pair of second coupling connectors comprises a body portion defined by a first end and an opposite, second end, each body portion of the pair of second coupling connectors having a respective channel configured to detachably couple the third frame to the first frame and the second frame, respectively. 25. The convertible cart of claim 21, wherein the first frame, the second frame, and third frame are erectable to corresponding vertical positions so as to form a luggage cart. 26. The convertible cart of claim 21, wherein the plurality of first coupling connectors is held in place by a plurality of nuts. 27. The convertible cart of claim 21, wherein the plurality of wheels comprises at least three wheels.
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