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1. (WO2010112078) PISTON RETRACTION ARRANGEMENT

Pub. No.:    WO/2010/112078    International Application No.:    PCT/EP2009/053947
Publication Date: Fri Oct 08 01:59:59 CEST 2010 International Filing Date: Fri Apr 03 01:59:59 CEST 2009
IPC: F16D 65/18
F16D 65/22
Applicants: SKF B.V
KAPAAN, Hendrikus, Jan
VERHULST, Laurens
VISSERS, Cornelius, Petrus, Antonius
Inventors: KAPAAN, Hendrikus, Jan
VERHULST, Laurens
VISSERS, Cornelius, Petrus, Antonius
Title: PISTON RETRACTION ARRANGEMENT
Abstract:
The invention relates to a retraction device for retracting a piston in a cylinder when a force acting on the piston is released, comprising a piston (2), a retraction member (5) having a first contact surface (6), a retraction body (3) having a second contact surface (7) 1 and a resilient element (4) which bears on the first contact surface (6) and the second contact surface (7), where the retraction member is fixedly attached to the piston, where the retraction body further comprises a friction member (8) adapted to bear on an inner cylinder wall with a force that is greater than a maximum spring force of the resilient element (4), and where the deflection length of the resilient element defines the stroke length of the retraction device. The invention further relates to a disc brake and a drum brake comprising such a retraction device, and to a vehicle comprising such a brake. The invention further relates to an inventive method for retracting a piston in a cylinder.