Wheel chair

Details Wheel chair Wheel chair

2005-06-21

2005-06-21

DePumpo, Daniel G. (Department: 3611)

Motor vehicles

Special driving device

Stepper

C180S008300, C280SDIG001

Reexamination Certificate

active

06907945

ABSTRACT:
Disclosed is a wheel chair capable of going over an obstacle or ascending or descending a stair. The wheel chair comprises a wheel frame; an actuator coupled to the wheel frame; a power generating unit coupled to the actuator; a first transmission having a sun gear fixed to the power generating unit, a plurality of planet gears meshed with the sun gear, a ring gear meshed with the respective planet gears, and carriers coupled to the respective planet gears; a second transmission having a driving shaft meshed with the ring gear, a key frame rotatably installed on the driving shaft, and a casing fixed to the key frame; a plurality of front wheels each coupled to the driving shaft; a follower drivingly coupled to the driving shaft and having a follower shaft; and a rear wheel fixed to the follower shaft.

REFERENCES:
patent: 2742973 (1956-04-01), Johannesen
patent: 2931449 (1960-04-01), King
patent: 3450219 (1969-06-01), Fleming
patent: 4790548 (1988-12-01), Decelles et al.
patent: 4794999 (1989-01-01), Hester
patent: 5273296 (1993-12-01), Lepek
patent: 5482305 (1996-01-01), Jeffries et al.
patent: 6550787 (2003-04-01), Chu et al.
patent: 4-255322 (1992-08-01), None
patent: 10-151158 (1998-06-01), None
patent: 10-211240 (1998-08-01), None
patent: 2001-0049058 (2001-06-01), None
PCT International Search Report; International application No. PCT/KR02/00978; International filing date of: May 23, 2002; Mailing date of: Sep. 12, 2002.
PCT International Preliminary Examination Report; International application No. PCT/KR02/00978; International filing date of: May 23, 2002; Date of Completion: Sep. 24, 2003.

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