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:
Aug. 03, 1999
Filed:
Feb. 14, 1997
Andrew W Kingston, Heidesheim, DE;
Robert L Ferger, Bad Homburg, DE;
Thomas Weigert, Bad Soden, DE;
Salvatore Oliveri, Filsen, DE;
Leonard Tribe, Sidmounth, GB;
Herbert L Linkner, Dexter, MI (US);
Kelsey-Hayes Company, Livonia, MI (US);
Abstract
An improved structure for an electrical actuation mechanism adapted for use in a disc brake assembly includes an electrical actuation mechanism adapted to be secured to an inboard leg of the caliper of the disc brake assembly. The electrical actuation mechanism includes a housing, an electrical motor disposed in the housing, and a spindle disposed in the housing and operatively coupled to the motor by a conversion gear assembly which is effective to convert rotary motion generated by the motor into axial movement of the piston. The spindle includes a shaft and a piston which can be coupled to the shaft by a dampening structure. The shaft is operatively connected to the motor for axial motion thereof, and the piston is operatively connected to a friction pad for engaging a rotor attached to a wheel of a vehicle in which the disc brake assembly is installed. The dampening structure can be comprised of elastomeric material or a fluid filled chamber defined between the piston and the shaft. The dampening structure reduces the radial loads acted upon the piston from being transmitted to the shaft. The electrical actuation mechanism may also be equipped with sensors for sensing the axial position of the piston, a clutch, to couple and uncouple the electric motor from the conversion gear assembly, and a mechanism which prevents back drive motion of the electrical motor.