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 Title: |
US7669862:
Foldable spider wheel for ascending and descending stairs
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Kamara, Steven; Princeton, NJ, United States of America
Yang, Michael; Princeton, NJ, United States of America
Follette, David; Princeton, NJ, United States of America
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| Assignee: |
SterraClimb LLC, Princeton, NJ, United States of America
other patents from STERRACLIMB LLC (938668) (approx. 1)
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| Published / Filed: |
2010-03-02
/ 2007-04-27
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| Application Number: |
US2007000796381
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| IPC Code: |
Advanced:
B62B 5/02;
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| ECLA Code: |
B62B5/02W; A45C5/14; K45C5/14R; K45C5/14T; L62B205/12;
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| U.S. Class: |
280/005.26;
180/008.1;
180/008.2;
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| Field of Search: |
280/5.26,5.2
180/8.1,8.2
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| Priority Number: |
| 2007-04-27 |
US2007000796381 |
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| Abstract: |
A collapsible spider wheel assembly on a towing device enables storage of the device into a standard rectangular space. Once collapsed, the collapsible spider assembly is protected within the body of the towing device. Furthermore, actuation of the folding and unfolding may be accomplished through the usual telescoping of the carrying handle of such a device, such as in a suitcase embodiment. While the spider wheels are in the open position, the carrying apparatus may exert a drive force to climb up stairs and braking force to descend stairs. The unit operates as a normal wheeled carrying apparatus while traversing a horizontal surface.
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| Attorney, Agent or Firm: |
Saul Ewing LLP ;
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| Primary / Asst. Examiners: |
Morris, Lesley; Stabley, Michael R
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
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First Claim:
Show all 11 claims |
1. A collapsible spider assembly comprising: a central driveshaft coupled to a towing device; a spider assembly coupled to an end of said driveshaft; means for collapsing said spider assembly; and a handle mounted on said towing device, said handle activating said means for collapsing said spider assembly for providing folding and/or unfolding of said spider assembly in a one-step push-pull procedure.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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