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:
May. 10, 2016
Filed:
Jul. 07, 2011
Philip Nagel, Augsburg, DE;
David Breuer, Tuebingen, DE;
Geoffrey Kermode, Kirkcaldy, GB;
Khaled Tibari, Edinburgh, GB;
Philip Nagel, Augsburg, DE;
David Breuer, Tuebingen, DE;
Geoffrey Kermode, Kirkcaldy, GB;
Khaled Tibari, Edinburgh, GB;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A piston unit for a radial piston machine includes a piston and a roller or a roller element. The roller or roller element has a circular cylindrical jacket apart from a chamfer. A hydrostatic pressure- or force-relief element is provided in a contact area between the piston and the roller. The hydrostatic pressure- or force-relief element forms a pressure field in the contact area. The roller or roller element also has one or two end-face holes. Due to the hole(s), the roller is slightly weakened at the associated end section such that Hertzian stress is reduced at the same associated end section.