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:
Apr. 17, 1984
Filed:
Aug. 24, 1981
Kip B Goans, Harvey, LA (US);
Baker, CAC, Inc., Belle Chase, LA (US);
Abstract
A temperature sensitive locking mechanism is provided for a fluid pressure actuator which will hold the shaft of the actuator in a spring compressing position until the occurrence of a pre-selected temperature in the vicinity of the actuator. Locking threads are provided on the exterior of the actuator, and a latching collet, having a plurality of peripherally spaced, internally threaded, latching arms cooperates with such threads and prevent movement of the actuator shaft by abutting a surface of a stop block which is in abutment with the actuator shaft. The radial faces of the threads are sufficiently angled so as to exert an outwardly directed camming force on the collet latching arms to permit the release of the latch under the axial forces produced by the spring bias on the actuator shaft. The collet latching arms are forcably retained in locked position by an encircling spring wire, the ends of which are connected by a fusible link. Expansion of the wire resulting from the link melting due to temperature increase causes the wire to un-coil and the above to occur.