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:
Sep. 03, 2013
Filed:
Aug. 11, 2009
Applicant:
Douglas R. Johnson, Waterloo, IA (US);
Inventor:
Douglas R. Johnson, Waterloo, IA (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 11/18 (2006.01); F16H 47/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hydro-mechanical transmission for an agriculture vehicle, such as a tractor. The transmission includes an input shaft, a hydrostatic unit driven by the input shaft, a mechanical transmission driven by the hydrostatic unit and/or the input shaft, and a valve assembly having a pressure control valve assembly to control an output speed of the hydrostatic unit. A mechanical shift control valve assembly is coupled with the mechanical transmission to selectively engage one of the gear sets of the mechanical transmission and adjust the hydrostatic unit speed.