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. 26, 1988
Filed:
May. 23, 1986
Sheldon L Kovit, Houston, TX (US);
Bryan K Yam, Houston, TX (US);
Douglas W Nayler, Mission Viejo, CA (US);
NL Industries, Inc., New York, NY (US);
Abstract
Apparatus for controlling fluid communication with a fluid pressure system includes parallel flow paths connected to the system. A first flow path includes first valve apparatus for selectively closing the flow path. The second flow path includes relief valve apparatus responsive to fluid pressure in the second flow path to move from a closed configuration to an open configuration. Switching apparatus, including sensors for detecting the condition of the system, operate to close the first valve apparatus in response to pre-determined threshold values of such condition. Fluid communication from the system may thereafter occur along the second flow path at the relief valve apparatus opens in response to pressure buildup in the flow path. A third flow path, parallel to the first two flow paths, may be provided with throttling apparatus for controlled communication of fluid along such third flow path.