Patent Number: 6,637,317

Title: Piston for a hydraulic pressure chamber

Abstract: The present invention relates to a piston for a hydraulic pressure chamber, especially a piston bore of a spot-type disc brake, wherein the piston is configured as a bowl-shaped hollow cylinder that is open on one side and made from a metal blank of a constant wall thickness in a forming operation. The piston has a bottom to which hydraulic pressure is applicable and a piston wall which, at its open end, passes over into a rim that has a circular abutment surface. Especially in view of conventional cast pistons, an object of the present invention is related to providing a piston which permits being manufactured by means of a simple forming operation, which can be configured as light as possible and with low expenditure in material, without limiting the stress capacity of the piston. This object is achieved in that the piston includes at least one portion with a fold shaping, where the thickness of the piston wall or of the bottom is increased compared to the thickness of the remaining piston wall or of the bottom and corresponds to several times the wall thickness of the metal blank. As a result, the piston is favorably reinforced only in areas of high stress.

Inventors: Zeibig; Uwe (Achern, DE), Hendrich; Uwe (Steinbach, DE), Weiler; Rolf (Eppstein, DE), Schneider; Peter (Russelsheim, DE)

Assignee: Continental Teves AG & Co., OHG

International Classification: B23P 15/10 (20060101); F16D 65/14 (20060101); F16J 1/00 (20060101); F16D 065/16 (); F16J 001/00 ()

Expiration Date: 10/28/2020