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:
Nov. 23, 1999
Filed:
May. 30, 1997
Thomas Nied-Menninger, Usingen, DE;
Luk Fahrzeug-Hydraulik GmbH, , DE;
Abstract
The present invention relates to a blocking-vane pump having a casing which contains a rotor and in the wall of which there are arranged grooves which receive in each case one blocking vane and which are pressed by a spring against a circumferential surface of the rotor which has control surfaces separated from each other by separating regions. According to the invention, at least four blocking vanes (30) are provided and, distributed over the circumferential surface (20) of the rotor (16), a number of control surfaces (22) amounting to a multiple of 2, two control surfaces (22) being in each case arranged opposite each other and developed identical and the number of control surfaces (22) being greater than the number of blocking vanes (30).