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 Title: |
US4790548:
Climbing and descending vehicle
[ Derwent Title ]
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Country:
Kind: |
US United States of America
A PATENT [FROM BEGIN UNTIL END 2000] or PATENT ISSUED AFTER 1ST PUB. WITHIN THE TVPP i
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| Inventor: |
DECELLES FABIEN; Canada
DECELLES PIERRE; Canada
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| Assignee: |
DECELLES FABIEN Canada
DECELLES PIERRE Canada
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| Published / Filed: |
1988-12-13
/ 1987-06-01
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| Application Number: |
US1987000056249
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| IPC Code: |
Advanced:
A61G 5/06;
B62B 9/06;
B62D 57/00;
B62D 57/02;
A61G 5/10;
Core:
A61G 5/00;
B62B 9/00;
more...
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| ECLA Code: |
A61G5/06A; A61G5/06B2; B62B9/06; B62D57/00; B62D57/02C; K61G5/10S10;
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| U.S. Class: |
280/005.26;
180/006.5;
180/008.2;
280/242.WC;
280/DIG.010;
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| Priority Number: |
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| Abstract: |
A stair-climbing and descending vehicle is disclosed, comprising a frame and a pair of transverse, co-axial, power-driven axles, each rotatably carrying a spider assembly at its outer end. Each spider has at least three wheels, one at each equi-spaced extremity of its radial arms. Each axle drives either the spider or the associated wheels through a differential gearing. When climbing a stairway, the spiders are rotated immediately when the wheels are prevented from rotating by encountering a stair riser. The differential also serves to safety and smoothly descend the stairs. The vehicle is adapted for use as a wheelchair, in which case a chair-shifting device is provided to shift the center of gravity of the vehicle, rearwardly.
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
| Gazette date |
Code |
Description (remarks) List all possible codes for US |
| 1993-02-23 |
FP - |
Expired due to failure to pay maintenance fee
( 1992-12-13 )
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| 1992-12-13 |
LAPS - |
Lapse for failure to pay maintenance fees
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| 1992-07-14 |
REMI |
Maintenance fee reminder mailed
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Family Legal Status Report
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