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:
Dec. 12, 2006
Filed:
Apr. 12, 2004
Applicants:
Edward Gilbert Shaw, Worcestershire, GB;
Laurence John Potter, Birmingham, GB;
Inventors:
Edward Gilbert Shaw, Worcestershire, GB;
Laurence John Potter, Birmingham, GB;
Assignee:
Haldex Brake Products, Ltd., , GB;
Primary Examiner:
Int. Cl.
CPC ...
F16K 31/42 (2006.01); F15B 13/043 (2006.01);
U.S. Cl.
CPC ...
Abstract
A valve assembly having a fluid switch and a main valve for controlling fluid pressure in a working volume in three control states wherein the main valve has three ports for fluid, flow of fluid through a first port and a second port being controlled by the fluid switch being provided with an electrical signal in a first state or a second state respectively, and flow of fluid through the third port being controlled by alternating the signal, preferably rapidly, between the first and second states.