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:
Jun. 16, 1987
Filed:
Apr. 12, 1985
Walter W Powell, Sugarland, TX (US);
Anderson-Greenwood USA, Inc., Houston, TX (US);
Abstract
In the preferred and illustrated embodiment, a safety relief valve, subject to control of redundant pilot valves with a control system, is set forth. A safety relief valve is ordinarily installed in a fail safe circumstance; accordingly, this control system incorporates redundant pilot valves which respond independently of one another having outputs utilized in the control system to trigger operation of the safety relief valve. The control system has, in its preferred form, an elongate body mounting redundant pilot valves on common manifold passages. If any pilot valve forms a signal requiring operation of the safety relief valve, that signal for the safety relief valve adjusts the setting of the safety relief valve.