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:
Apr. 12, 2022
Filed:
Dec. 11, 2017
Applicant:
Wabco Europe Bvba, Brussels, BE;
Inventor:
Peter Todman, Upper Poppleton York, GB;
Assignee:
ZF CV SYSTEMS EUROPE BV, Brussels, BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 3/00 (2006.01); F04B 9/04 (2006.01); F04B 27/02 (2006.01); F04B 37/14 (2006.01); F04B 53/14 (2006.01);
U.S. Cl.
CPC ...
F04B 3/003 (2013.01); F04B 9/045 (2013.01); F04B 27/02 (2013.01); F04B 37/14 (2013.01); F04B 53/14 (2013.01);
Abstract
A piston type pump includes a pump housing having at least one pump inlet, at least one pump outlet, and a piston arrangement connected to a drive shaft configured to, when driven, set the piston arrangement into movement. The piston arrangement includes a first primary stage piston, the first primary stage piston being slidably seated in a first primary stage cylinder formed in the pump housing, and a first secondary stage piston. The first secondary stage piston is slidably seated in a first secondary stage cylinder formed in the first primary stage piston.