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:
May. 18, 1999
Filed:
Apr. 07, 1997
Gary Chris Fulks, Dayton, OH (US);
Michael Anthony Dimatteo, Kettering, OH (US);
William Charles Kruckemeyer, Beavercreek, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A pump-motor apparatus comprising: a pump having an input shaft for receiving motive force to operate the pump, wherein during rotation of the input shaft, the pump exhibits repeating cyclical first torque variations on the input shaft, said first torque variations including cyclical torque peaks and torque dips and occurring in substantially evenly spaced increments in angular position of the input shaft; and an electric drive motor having an output shaft coupled to and driving the input shaft, wherein the electric drive motor exhibits on the output shaft repeating cyclical second torque variations, said second torque variations including cyclical torque peaks and torque dips and occurring in substantially evenly spaced increments in angular position of the output shaft, wherein the substantially evenly spaced increments in angular position of the output shaft are equal to the substantially evenly spaced angular increments in position of the input shaft, wherein torque peaks and dips of the output shaft second torque variations are aligned with the torque peaks and dips of the input shaft first torque variations.