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:
Jul. 27, 1993
Filed:
Mar. 27, 1992
Applicant:
Inventors:
Richard W Clark, Phoenix, AZ (US);
Howard Greene, Phoenix, AZ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
180307 ; 180305 ;
Abstract
An electric car is powered from a primary power source in the form of a three-phase parallel resonant electric motor operated at a constant speed (the speed of resonance). The electric motor is provided with operating power from an invertor coupled to storage batteries in the electric car. The motor drives a main hydraulic pump, which is hydraulically connected with a pair of variable displacement drive motors, each connected to different drive wheels on opposite sides of the vehicle. The fluid flow through the pump is varied from 0% to 100% to control the speed of operation of the drive motors connected to the drive wheels of the vehicle.