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:
Dec. 09, 2003
Filed:
Jun. 28, 2002
Neil J. Clark, Granger, IN (US);
Thomas E. Demoise, Jr., Osceola, IN (US);
Robert Bosch Corporation, Broadview, IL (US);
Abstract
A disc brake having a ball-in-ramp actuator retained in a caliper for supplying a piston with a static clamping force to move first and second friction members into frictional engagement with a rotor to effect a parking brake application. The clamping force is transmitted from the ball-in-ramp actuator into the piston through an adjustment screw mechanism. The disc brake being susceptible to a thermal expansion and a thermal contraction and as a result the effect of the clamping force applied to bring the first and second friction members into engagement with the rotor may change during a time period that the parking brake application is initiated until it is terminated. The adjustment screw mechanism is characterized by a spring that is compressed by the actuation force to initiate the parking brake application that expands and contracts to compensate for the thermal contraction and expansion of the disc brake such that the effect of the static clamping force remains substantially the same for the duration time of the parking brake application.