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:
Jun. 11, 2019
Filed:
Feb. 18, 2016
Applicant:
Concentric Birmingham Limited, Birmingham, GB;
Inventors:
Paul Shepherd, Birmingham, GB;
Mark Pieczko, Birmingham, GB;
Assignee:
CONCENTRIC BIRMINGHAM LIMITED, Birmingham, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01M 1/16 (2006.01); F01M 11/02 (2006.01); G05D 16/20 (2006.01); F16K 31/124 (2006.01);
U.S. Cl.
CPC ...
F01M 11/02 (2013.01); F01M 1/16 (2013.01); G05D 16/2086 (2013.01); F16K 31/124 (2013.01); G05D 16/2093 (2013.01);
Abstract
A recirculation valve for a pump having a regulator spool, a first resilient biasing member and a control valve. The first resilient biasing member biases the regulator spool in a first position in which flow of a liquid from a first port of the pump to a second port of the pump is prevented. The control valve controls the force required to move the regulator spool against the first resilient biasing member to a second position in which flow of the liquid from the first port to the second port is enabled.