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:
Nov. 10, 2009
Filed:
Jul. 31, 2007
Applicants:
Robert Carlson, Hudson, WI (US);
Thomas W. Roeber, Yarmouth, ME (US);
Omid Ghayebi, South Portland, ME (US);
Inventors:
Robert Carlson, Hudson, WI (US);
Thomas W. Roeber, Yarmouth, ME (US);
Omid Ghayebi, South Portland, ME (US);
Assignee:
Briggs and Stratton Corporation, Wauwatosa, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 47/04 (2006.01); F16H 39/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A rotary control valve for a vehicle hydrostatic transmission includes a hydraulic pump and a hydraulic motor. The valve is configured to control both a direction and a speed of the hydrostatic transmission. The rotary control valve includes a rotary valve plate configured to oscillate through a range of less than 180 degrees independently of the pump and the motor.