The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 1987
Filed:
Apr. 14, 1986
Applicant:
Inventor:
Herbert M Doman, Camarillo, CA (US);
Assignee:
Everest & Jennings, Inc., Camarillo, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
318 80 ; 307242 ; 307254 ; 3072 / ; 323272 ;
Abstract
A controller for a wheelchair motor or the like including two power transistors each having a base and a collector-emitter path, the collector-emitter paths being connected in parallel. At least one oscillator and a flip-flop are provided to supply pulses alternately to the transistor bases so that the transistors are never turned on simultaneously. In another system, two or more transistors are connected in parallel and are gated on in digital succession responsive to the outputs of a ring counter.