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:
Mar. 10, 1998
Filed:
Apr. 29, 1996
Michael Andrew Theodos, Alexandria, LA (US);
Roger Dale Danzy, Pineville, LA (US);
Dresser Industries, Inc., Dallas, TX (US);
Abstract
An assembly and method for controlling the opening of a safety relief valve exposed to a system fluid pressure and containing a control fluid which controls the opening of the safety relief valve. The assembly includes a pilot valve connected to the safety relief valve and adapted to respond to a predetermined pressure of the system fluid for permitting flow of the control fluid. A regulator receives the control fluid and operates to reduce the pressure of the control fluid a predetermined amount. The safety relief valve opens in response to the reduction of the control fluid pressure, and the remaining control fluid pressure modulates the opening of the safety relief valve.