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. 16, 2000
Filed:
Apr. 20, 1998
Applicant:
Inventors:
Lawrence Ray Folsom, Pittsfield, MA (US);
Clive Tucker, Pittsfield, MA (US);
Assignee:
General Dynamics Land Systems, Inc., Sterling Heights, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
60438 ; 60436 ;
Abstract
In a continuously variable hydrostatic transmission including a hydraulic pump unit driven by an input shaft, a grounded hydraulic motor unit, and an intermediate, wedge-shaped swashplate for developing torque on an output shaft in response to pumped exchanges of hydraulic fluid between the pump and motor units through swashplate ports, a ratio controller is provided to vary transmission ratio by changing the swashplate angular orientation and to engage a lock-up clutch directly mechanically coupling the input shaft to the output shaft when a 1:1 transmission ratio is set.