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 Title: |
US4645222:
Vehicle and method of operating same
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Hester, Robert; Shifnal, Shropshire, United Kingdom
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| Assignee: |
None
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| Published / Filed: |
1987-02-24
/ 1985-05-06
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| Application Number: |
US1985000731110
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| IPC Code: |
Advanced:
A61G 5/00;
A61G 5/02;
A61G 5/06;
Core:
more...
IPC-7:
B62B 9/06;
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| ECLA Code: |
A61G5/06A; A61G5/06B2;
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| U.S. Class: |
Current:
280/005.26;
180/008.2;
D12/131;
Original:
280/005.26;
180/008.2;
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| Field of Search: |
280/5.26,5.2,5.28,DIG. 10,5.24
180/8.2,907
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| Priority Number: |
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| Abstract: |
PCT No. PCT/GB84/00103 Sec. 371 Date May 6, 1985 Sec. 102(e) Date May 6, 1985 PCT Filed Mar. 28, 1984 PCT Pub. No. WO85/01206 PCT Pub. Date Mar. 28, 1985.A wheelchair capable of climbing a flight of steps has a cluster of rear wheels rotatably mounted on a member (19) which can pivot on a body (10) of the chair to move the rear wheels upwardly and downwardly and thereby compensate for differences in the levels of the surfaces on which the rear wheels and front wheels of the chair rest. The member (19) is pivoted automatically in accordance with differences between the rotation of front and rear drive elements.
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| Attorney, Agent or Firm: |
Parmelee, Miller, Welsh & Kratz ;
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| Primary / Asst. Examiners: |
Love, John J.; Dukes, Mark C.
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
Show 11 known family members
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First Claim:
Show all 7 claims |
I claim:
1. A wheelchair comprising a seat and front and rear wheel assemblies for supporting the seat wherein each said assembly comprises a respective spider and a plurality of wheels rotatably mounted on the spider, one of said assemblies is movable upwardly and downwardly relative to the seat when the seat is in the normal attitude of use, each of said spiders is mounted for rotation relative to the seat about a respective axis, there is provided control means including a control element displaceable relative to the seat and a linkage for transmitting displacement between the control element and the one wheel assembly and wherein the wheelchair includes a single drive means for simultaneously driving the spiders and the control element, said drive means providing a driving connection between the spiders and the control element whereby displacement of the control element relative to the seat is dependant on the relation between rotation of the spider of said front assembly and rotation of the spider of said rear assembly.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| PCT Number: |
PCT/GB84/00103
WO8501206
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| PCT Pub./Filed Dates: |
1985-03-28 / 1984-03-28
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| § 371 / 102(e) Dates: |
1985-05-06 / 1985-05-06
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| Forward References: |
Show 21 U.S. patent(s) that reference this one
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