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:
Jul. 22, 2003
Filed:
Oct. 18, 2001
David Anthony Harries, Stratford upon Avon, GB;
Abstract
A hydraulic actuation system for an automated transmission system including, a hydraulic clutch actuator ( ) for controlling engagement of a clutch ( ), a gear engagement actuator ( ) for controlling engagement of a gear, said gear engagement actuator ( ) being in the form of a double acting ram having first and second working chambers ( ) acting on opposite sides of a piston ( ), a main control valve ( ), the main control valve ( ) selectively connecting the clutch actuator ( ) and/or the gear engagement actuator ( ) to an accumulator ( ) or to a reservoir ( ); a gear engagement control valve ( ) selectively connecting the first and second working chambers ( ) of the gear engagement actuator ( ) to the main control valve ( ) or to the reservoir ( ); an electrically driven pump ( ) being provided to charge the accumulator, the pressure of fluid supplied by the pump being controlled by variation of the current driving the pump ( ).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile