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:
Jul. 04, 2006
Filed:
Oct. 01, 2004
Applicants:
Tomasz Slawinski, Northbrook, IL (US);
Jianping Chen, Gurnee, IL (US);
Inventors:
Tomasz Slawinski, Northbrook, IL (US);
Jianping Chen, Gurnee, IL (US);
Assignee:
HydraForce, Inc., Lincolnshire, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cartridge relief valve uses a piston design. The piston replaces a tube used in prior art relief valves. The piston makes the inventive relief valve easier to manufacture and more stable than prior art relief valves. This is due to the fact that, for a given size valve, the diameter of the piston is smaller than the diameter of the tube that it replaces. Furthermore, the diameter of the pilot seat of the inventive relief valve is also smaller than the diameter of the pilot seat of many prior art valves.