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Title:
PISTON UNIT FOR A RADIAL PISTON MACHINE
Document Type and Number:
WIPO Patent Application WO/2012/010261
Kind Code:
A3
Abstract:
The invention relates to a piston unit of a radial piston machine. The piston unit has a stepped piston and a roller or a roller body. A hydrostatic pressure or force release is provided in a contact region between the stepped piston and the roller, said release forming a pressure field. The stepped piston has two retaining sections adjacent to the roller. According to the invention, said sections are elastic and/or the stepped piston has a respective weakened point in the region of the step between the main section and the retaining sections. This allows the retaining sections to lie tightly against the roller thus reducing a gap or distance therebetween.

Inventors:
NAGEL PHILIP (DE)
BREUER DAVID (DE)
KEMPIK ALAN (GB)
TIBARI KHALED (GB)
Application Number:
PCT/EP2011/003391
Publication Date:
April 26, 2012
Filing Date:
July 07, 2011
Export Citation:
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Assignee:
BOSCH GMBH ROBERT (DE)
NAGEL PHILIP (DE)
BREUER DAVID (DE)
KEMPIK ALAN (GB)
TIBARI KHALED (GB)
International Classes:
F03C1/04; F03C1/047; F04B1/04; F04B1/047; F04B53/00; F04B53/14
Domestic Patent References:
WO1999006703A11999-02-11
Foreign References:
DE2460512A11976-06-24
DE19859199A12000-07-13
EP0688952A11995-12-27
FR2368619A11978-05-19
US20090183629A12009-07-23
DE4037455C11992-02-06
Attorney, Agent or Firm:
THUERER, Andreas (Zum Eisengiesser 1, Lohr, DE)
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