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:
Jan. 30, 2001
Filed:
Dec. 23, 1998
Applicant:
Inventors:
Karsten Schnittger, Bad Vilbel, DE;
Hans-J{umlaut over (u)}rgen Lauth, Neu Anspach, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 1/700 ; F04B 3/500 ;
U.S. Cl.
CPC ...
F04B 1/700 ; F04B 3/500 ;
Abstract
A pump having a pump housing with a rotor in it, particularly a vane pump. The pump housing having a centering aid in the form of a sleeve that extends toward a drive shaft. The shaft has a smaller diameter than the bore through the sleeve. The shaft has a preferably toothed end portion that is received in a non-positively locking manner in the rotor. In a single stroke vane pump, the axis of the drive shaft is offset from the axis of the sleeve to compensate for the forces in pumping. The housing over the rotor and drive thereto is disclosed.