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. 30, 2002
Filed:
Oct. 30, 1998
Jean-Marc Attard, Chantilly, FR;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A master cylinder having a body ( ) with a bore ( ) therein in which slides at least a primary piston ( ). The primary piston ( ) has a compensation passage ( ), which in a position of rest, places a pressure chamber ( ) in communication with a reservoir ( ). The communication between interrupted upon actuation of the master cylinder by a control rod ( ) acting on a second piston ( ) sliding in the bore ( ). A first compression spring ( ) and a second compression spring ( ) urge the primary piston ( ) and second spring ( ) toward a rear position of rest. The preload force of the first compression spring ( ) exceeding that of the second compression spring ( ) such that the second piston ( ) is the first to move in response to a force applied to the control rod ( ). The rear position of rest for the primary piston ( and second piston ( ) is defined by a same stop ( ) which is integral with the body ( ) of the master cylinder.