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:
May. 06, 1986
Filed:
Jul. 01, 1985
Applicant:
Inventor:
Robert F Estes, Foxboro, MA (US);
Assignee:
Crosby Valve & Gage Company, Wrentham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137488 ; 1371163 ;
Abstract
A pilot operated pressure relief valve system having a modulating action. The pilot valve is of the non-flowing type and comprises sleeve and control stem members translating within a channel. The sleeve member comprises an exhaust valve for relieving dome pressure on the relief valve when lifted by the control stem. The control stem translates in response to system pressure changes and comprises an inlet valve cooperating with a seat on the sleeve member to form an inlet valve closable to isolate the dome from the system pressure when the latter reaches a level predetermined in relation to a set pressure.