Wheel retraction assembly, cart and related components
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B62D-063/08
B62D-063/06
B62D-061/12
B62B-001/20
B62B-005/06
출원번호
US-0094284
(2016-04-08)
등록번호
US-9573639
(2017-02-21)
발명자
/ 주소
Furtado, Anthony G.
출원인 / 주소
Furtado, Anthony G.
대리인 / 주소
Winston & Strawn LLP
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
The present invention provides a wheel retraction assembly that can be used with a convertible cart for transport of cargo. The convertible cart includes a support structure, first and/or second wheels, each with a retraction assembly that includes telescopic and fixed struts. The wheel retraction a
The present invention provides a wheel retraction assembly that can be used with a convertible cart for transport of cargo. The convertible cart includes a support structure, first and/or second wheels, each with a retraction assembly that includes telescopic and fixed struts. The wheel retraction assembly is operatively associated with the support structure and is movable between retracted and expanded positions. One end of telescopic strut mounts the wheel axle structure and the opposite end is connected to the support structure. In the retracted position, the wheel retraction assembly maintains the first and/or second wheels in a position to enable the cart to be moved. In the expanded position, the retraction assembly moves the first and/or second wheels to another position to be adjacent the support structure wherein the wheels do not support the cart. The cart also features a convertible handle assembly and a mountable platform.
대표청구항▼
1. A retractable wheel assembly, comprising: a support structure having bottom and side portions;a wheel having an axle;a wheel retraction assembly including a fixed strut connecting one end of the wheel axle to the support structure, and a telescopic strut connecting the opposite end of the wheel a
1. A retractable wheel assembly, comprising: a support structure having bottom and side portions;a wheel having an axle;a wheel retraction assembly including a fixed strut connecting one end of the wheel axle to the support structure, and a telescopic strut connecting the opposite end of the wheel axle to the support structure;wherein one end of the fixed strut is fixedly mounted to the wheel axle and the other end is pivotally mounted to a side portion of the support structure; andwherein one end of the telescopic strut is fixedly mounted to the wheel axle and the other end is pivotally mounted to the bottom portion of the support structure, with the telescopic strut movable between retracted and expanded positions, wherein the retracted position maintains the wheel in an operative position with the struts positioned essentially perpendicular to the support structure to enable the support structure to be moved upon the first wheel to transport cargo that is placed on the support structure, while in the retracted position the wheel is placed in an inoperative position with the struts essentially parallel to the first support structure. 2. The retractable wheel assembly of claim 1, wherein the telescopic strut includes first and second rectangular or square tubing sections in sliding engagement. 3. The retractable wheel assembly of claim 1, further comprising a quick release connector for maintaining the telescopic strut in the retracted or expanded position. 4. The retractable wheel assembly of claim 3 wherein the quick release connector comprises holes on one tubing section corresponding to the retracted and expanded positions and a button associated with the other tubing section for engaging one of the holes to hold the telescopic strut in the retracted or expanded position. 5. The retractable wheel assembly of claim 1 wherein the fixed strut includes first and second fixed strut members one end of each which is attached to the first support structure and the other end of each is engaged with one end of the first wheel axle. 6. A convertible cart for transport of cargo, comprising: a first support structure;a first wheel having an axle;a first wheel retraction assembly operatively associated with the first support structure, and including a fixed strut for mounting one end of the first wheel axle to the first support structure and a telescopic strut connecting the opposite end of the first wheel axle to the first support structure, with the telescopic strut movable between retracted and expanded positions, wherein the retracted position maintains the first wheel in a position to enable the cart to be moved upon the first wheel and the expanded position moves the first wheel to another position adjacent the first support structure wherein the wheel does not support the cart. 7. The cart of claim 6 further comprising a connection attachment member configured and dimensioned for attachment to a trailer hitch of a vehicle for transport of the cart. 8. The cart of claim 6 further comprising a basket or plate member attached to the first support structure for assisting in supporting cargo to be transported by the cart. 9. The cart of claim 6 wherein the telescopic strut includes first and second rectangular or square tubing sections in sliding engagement. 10. The cart of claim 6, further comprising a quick release connector for maintaining the telescopic strut in the retracted or expanded position. 11. The cart of claim 10 wherein the quick release connector comprises holes on one tubing section corresponding to the retracted and expanded positions and a button associated with the other tubing section for engaging one of the holes to hold the telescopic strut in the retracted or expanded position. 12. The cart of claim 6 wherein the fixed strut includes first and second fixed strut members one end of each which is attached to the first support structure and the other end of each is engaged with one end of the first wheel axle. 13. The cart of claim 6 further comprising: a second support structure;a second wheel having an axle;a second wheel retraction assembly operatively associated with the second support structure, and including a fixed strut for mounting one end of the second wheel axle to the second support structure and a telescopic strut connecting the opposite end of the second wheel axle to the second support structure, with the telescopic strut movable between retracted and expanded positions, wherein the retracted position maintains the second wheel in a position to enable the cart to be moved upon the second wheel and the expanded position moves the second wheel to another position to be adjacent the second support structure wherein the wheel does not support the cart. 14. The cart of claim 13, wherein the fixed strut of the second wheel retraction assembly includes first and second fixed strut members one end of each which is attached to the second support structure and the other end of each is engaged with one end of the second wheel axle. 15. The cart of claim 6 further comprising: a second wheel having an axle;a second wheel retraction assembly operatively associated with the first support structure, and including a fixed strut for mounting one end of the second wheel axle to the second support structure and a telescopic strut connecting the opposite end of the second wheel axle to the first support structure, with the telescopic strut movable between retracted and expanded positions, wherein the retracted position maintains the second wheel in a position to enable the cart to be moved upon the second wheel and the expanded position moves the second wheel to another position adjacent the first support structure wherein the wheel does not support the cart. 16. The cart of claim 15, wherein the second support structure is attached or connected to the first support structure by structural members, a separate basket or a plate member attached to the first support structure so that the second support structure can assist in supporting cargo to be transported by the cart. 17. The cart of claim 15, wherein the telescopic strut of the second wheel retraction assembly includes first and second rectangular or square tubing sections in sliding engagement. 18. The cart of claim 17, further comprising a quick release connector for maintaining the telescopic strut of the second wheel retraction assembly in the retracted or expanded position. 19. The cart of claim 18, wherein the quick release connector comprises holes on one tubing section of the telescopic strut of the second wheel retraction assembly corresponding to the retracted and expanded positions and a button associated with the other tubing section of the telescopic strut of the second wheel retraction assembly for engaging one of the holes to hold the telescopic strut of the second wheel retraction assembly in the retracted or expanded position. 20. A convertible cart for transport of cargo, comprising: a support structure;a wheel having an axle;a wheel retraction assembly operatively associated with the support structure, and including a fixed strut for mounting one end of the wheel axle to the support structure and a telescopic strut connecting the opposite end of the wheel axle to the support structure, with the telescopic strut movable between retracted and expanded positions, wherein the retracted position maintains the wheel in a position to enable the cart to be moved upon the wheel and the expanded position moves the wheel to another position adjacent the support structure wherein the wheel does not support the cart;a first connection mechanism connecting the telescopic strut to the support structure, the first connection mechanism including a bracket, the bracket having an opening facing toward the wheel in the expanded position; anda second connection mechanism connecting the fixed strut to the support structure, the second connection mechanism including an additional bracket, the additional bracket having an additional opening facing toward the wheel in the retracted position.
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