Driving system for passing fly-over obstacles by invalid chair

Details Driving system for passing fly-over obstacles by invalid chair Driving system for passing fly-over obstacles by invalid chair

2005-08-26

2008-07-08

Boehler, Anne Marie (Department: 3611)

Land vehicles

Step or abutment ascending type vehicle

With spider-type engaging means

C280S249000, C280S250100

Reexamination Certificate

active

07396023

ABSTRACT:
A driving system allows an invalid chair having a seating structure, wheels on both sides of the seating structure and at least one front stabilizing wheel, to pass obstacles. The driving system has arms secured to both sides of the seating structure and on which shafts of the wheels are arranged slidingly within two extreme positions. Cranks are on both sides of the seating structure and rotary cross engagement members are at the rear and on both sides of the seating structure and have arms which are terminated with adhesive end pieces. Each crank is connected to a respective rotary cross engagement member through a geared transmission for transmission of rotary movement of the crank to the rotary cross engagement member, and the geared transmission is provided with a flap for preventing reverse rotating of the crank.

REFERENCES:
patent: 1551127 (1925-08-01), Whyel
patent: 3196970 (1965-07-01), Brenner
patent: 3214184 (1965-10-01), Kemm
patent: 3241848 (1966-03-01), Flory
patent: 3283839 (1966-11-01), Brown et al.
patent: 4108449 (1978-08-01), Rhodes
patent: 4264085 (1981-04-01), Volin
patent: 4310167 (1982-01-01), McLaurin
patent: 4512588 (1985-04-01), Cox
patent: 5356172 (1994-10-01), Levy et al.

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