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:
Feb. 22, 2000
Filed:
Jul. 10, 1998
Helmut Franke, Harsewinkel, DE;
Karl-Thomas Rhody, Boostedt, DE;
Claas Industrietechnik GmbH, Paderborn, DE;
Abstract
A hydraulic control system for connecting elements, which is particularly applicable for an externally engaged clutch on an engine, comprises a pump for producing an oil stream, a distributing valve for determining the flow path of the oil stream, a throttle serving as a metering orifice and inserted in a flow path causing a pressure gradient in the oil stream, a regulating valve connected by supply and return pipes to the flow path of the first throttle upstream and downstream of the throttle, which has a regulating piston acted upon by the higher oil pressure and displaceable against a spring force, a control groove provided on the regulating piston which operates by a ring groove arranged between the piston chamber and the regulating valve with clutch pipe and tank pipes, a second throttle serving as a time orifice and inserted in an output pipe proceeding from the end region of a spring chamber towards the return pipe and adjustable to the closing time of the clutch and a pressure relief output which proceeds from the spring chamber at a distance in front of the output pipe, is connected to the return pipe and can be shut off by the regulating piston on a short stroke.