Theodore R Coker

US Patent:

51254689, Jun 30, 1992

Filed:

Mar 7, 1991

Appl. No.:

7/666145

Inventors:

Theodore R. Coker - Whitefish Bay WI

International Classification:

B60K 100

US Classification:

180 13

Abstract:

A battery powered steerable electric drive unit for detachable connection to a conventional wheelchair having a collapsible wheelchair frame comprises: a support releasably connectable to the wheelchair frame by an adjustable releasably lockable attachment mechanism; a drive assembly pivotably (steerably) mounted on the support and including a ground-engaging wheel and a battery powered electric motor for dirving the wheel; a solenoid-operated brake engageable with a disc-like surface of a pulley in the drive mechanism for the wheel; a detachable steering column having a handle mounted thereon and pivotably and rotatably mounted on the support; an adjustable steering mechanism mounted on the support and connected between the steering column and the drive assembly to effect steering when the steering column is rotated about its longitudinal axis; and an electric controller comprising an off-forward-reverse switch, a speed control switch and a brake switch mounted on the handle, and further comprising a solid-state electronic control circuit mounted on the support and responsive to operation of the switches to control the motor and the brake.

US Patent:

43866727, Jun 7, 1983

Filed:

Jun 11, 1981

Appl. No.:

6/272536

Inventors:

Theodore R. Coker - Milwaukee WI

International Classification:

B60K 100

US Classification:

180 13

Abstract:

A battery powered steerable electric drive unit for detachable connection to a conventional wheelchair comprises: a framework releasably connectable to the wheelchair frame by snap-on connectors; a drive assembly pivotably (steerably) mounted on the framework and including a ground-engaging wheel and battery-powered electric motor for driving the wheel; a detachable steering column pivotably and rotatably mounted on the framework and operatively connected to the drive assembly to effect steering when rotated about its longitudinal axis; a handle mounted transversley on the steering column and rotatable in opposite directions to various positions about its horizontal longitudinal axis; and an electric controller including switches responsive to handle rotation to control the direction and speed of motor rotation.

US Patent:

50167200, May 21, 1991

Filed:

Jun 2, 1989

Appl. No.:

7/360581

Inventors:

Theodore R. Coker - Whitefish Bay WI

International Classification:

B60K 100

US Classification:

180 13

Abstract:

A battery powered steerable electric drive unit for detachable connection to a conventional wheelchair having a collapsible wheelchair frame comprises: a support releasably connectable to the wheelchair frame by an adjustable releasably lockable attachment mechanism; a drive assembly pivotably (steerably) mounted on the support and including a ground-engaging wheel and a battery powered electric motor for driving the wheel; a solenoid-operated brake engageable with a disc-like surface of a pulley in the drive mechanism for the wheel; a detachable steering column having a handle mounted thereon and pivotably and rotatably mounted on the support; an adjustable steering mechanism mounted on the support and connected between the steering column and the drive assembly to effect steering when the steering column is rotated about its longitudinal axis; and an electric controller comprising an off-forward-reverse switch, a speed control switch and a brake switch mounted on the handle, and further comprising a solid-state electronic control circuit mounted on the support and responsive to operation of the switches to control the motor and the brake.