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:
Oct. 25, 1994
Filed:
Nov. 05, 1993
Thomas Bowen, Thousand Oaks, CA (US);
Barry L Frost, Waterford, MI (US);
New Venture Gear, Inc., Troy, MI (US);
Abstract
A geared torque transfer device is provided having a planetary type gear arrangement disposed within a sealed housing that is filled with a viscous fluid. In operation, rotation of the planet gears within the housing in response to a speed differential between the input and output members causes the viscous fluid to be forcibly pumped through passages formed within the housing. Valves responsive to changes in the operating temperature and/or viscous fluid pressure of the geared traction unit adjust the amount of resistance to the flow of the fluid as it is pumped through the passages. The hydraulic resistance created by pumping the viscous fluid is adapted to resist the free rotation of the device, thereby causing torque to be transferred between the input and output members as a function of the differential speed therebetween.