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. 04, 1999
Filed:
Dec. 29, 1997
Applicant:
Inventors:
John Gerard Mulvihill, Portage, MI (US);
Terry E Teeter, Mattawan, MI (US);
Assignee:
Eaton Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
74745 ; 74335 ;
Abstract
A transmission range valve replaces a traditional spring bias with a pressurized fluid bias to prevent an unintended range change in the event of a significant fluid pressure decrease or loss. Because pressurized fluid is used both for biasing the range valve and for shifting the range valve to effect an auxiliary section range change, a pressure drop or loss of supply pressure will not result in a change of state of the range valve as may occur with prior art spring biased valves.