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:
Nov. 20, 2001
Filed:
Mar. 14, 2000
Jeff A. Conley, Sugar Land, TX (US);
Tyco Flow Control, Inc., Houston, TX (US);
Abstract
A pilot operated safety relief valve (,) having a main piston valve member (,). A dome chamber (,) is provided in the valve body (,) over piston valve member (,) and a cap (,) forms a closure for dome chamber (,). A pilot valve (,) is mounted on the cap (,) and has a diaphragm actuated fluid inlet sensing tube (,) received within a bore (,) of the piston valve member (,). Inlet fluid pressure is communicated through bore (,) of sensing tube (,) to the inlet fluid sensing chamber (,) on the outer side of diaphragm (,). Exhaust chamber (,) is positioned between dome chamber (,) and inlet sensing chamber (,). Adjustment spring (,) continuously urges O-ring (,) in dome chamber (,) to a seated position on seat (,). An annular clearance (,) is provided between sensing tube (,) and piston (,) for providing a restricted fluid flow between dome chamber (,) and the inlet (,).