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:
Mar. 18, 1980
Filed:
Dec. 29, 1977
Marvin D Johns, Fort Wayne, IN (US);
Gordon W Denton, Fort Wayne, IN (US);
Ronald E Heymann, Auburn, IN (US);
Dana Corporation, Toledo, OH (US);
Abstract
A self-contained hydraulic unit is provided for controlling operation of a friction clutch assembly. The hydraulic unit is connected to a source of pressure so that when pressure is applied to the unit it responds to actuate a plurality of levers to engage the clutch. Upon removal of pressure from the hydraulic unit, spring means responds to withdraw the levers and disengage the clutch. The hydraulic unit is non-rotatably supported by the friction clutch assembly and includes an axially fixed member and an axially movable member interconnected by a sliding connection. A piston and diaphragm arrangement is provided between the fixed and movable members so that when pressure is introduced into the diaphragm the piston operates to slide the movable member relative to the fixed member by means of the sliding connection thereby actuating the levers to cause engagement of the clutch.