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:
Feb. 17, 1976
Filed:
Dec. 16, 1974
J David Nunneley, Tulsa, OK (US);
Frank W. Murphy Manufacturer, Inc., Tulsa, OK (US);
Abstract
A single differential area piston with annunciator flag and coacting malfunction indicia scale is capable of monitoring a relatively large number of malfunction or shut-down points on a compressor or the like. The annunciator piston responds to leakage of an operating fluid medium caused by venting to atmosphere of a particular malfunction sensor on a compressor or like machine with which the annunciator is connected. The annunciator or indicator additionally operates shut-down and start-up control instrumentalities for the monitored machine. A great simplification in tubing, tubing connections and venting means is obtained in comparison to the prior art.