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:
Aug. 18, 1998
Filed:
Jan. 13, 1997
Applicant:
Inventors:
Johann Merz, Schwabisch Gmund, DE;
Masao Yasuda, Yokohama, JP;
Assignee:
ZF Friedrichshafen AG., Friedrichshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C / ;
U.S. Cl.
CPC ...
418133 ; 418259 ;
Abstract
The invention relates to a vane cell pump with a control plate (8) and an end plate (6), between which a pump package (1) is located. The control plate (8) and the end plate (6) have suction and compression chambers (12, 12A and 13, 13A, respectively) opposite one another. While the control plate (8) controls the inflow and outflow of oil, the end plate (6) has a function of guiding the oil. According to the invention, the control edges (15, 15A, 16, 16A, 17, 17A, 18, 18A) on the end plate (6) are recessed relative to the control edges of the control plate (8). This provision enables more-economical manufacture.