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. 18, 1990
Filed:
Feb. 12, 1987
Alfred Teves GmbH, Frankfurt am Main, DE;
Abstract
A hydraulically actuated braking apparatus, for spot-type disc brakes is disclosed including a piston having an actuating end, protrudes from the brake housing and which acts on a brake pad. The piston is provided with a shoulder, and a metal ring is mounted on the piston's outside surface. An elastic folded collar is fastened behind the metal ring. The outside surface of the piston has at least one indentation of a specific shape and size in the area of the protruding end of the piston. So as to effect a tight fit of the metal ring on the piston, projections are distributed on the inside circumference of the metal ring on elastic ring elements which elements are axially bent out of the radial plane. Guide surfaces are also distributed at the inside circumference of the ring for fastening the metal ring at the piston in a predetermined position.