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. 18, 1989
Filed:
May. 31, 1988
Thomas H Bowder, Coventry, RI (US);
Elmwood Sensors, Inc., Pawtucket, RI (US);
Abstract
A thermally activated snap-action valve includes a valve body having an interior cavity and inlet and outlet passages formed therein and a bimetallic disc, a ball element, and a resilient positioning plate in the cavity. The positioning plate is operative for normally positioning the ball element in inwardly spaced relation to a valve seat at the inner end of the outlet passage, and the bimetallic disc is mounted in the cavity so that the pressures in a fluid passing through the valve are substantially equal on opposite sides of the bimetallic disc. The bimetallic disc is operative with a flexing action in response to a predetermined temperature condition for moving the ball element to a closed position wherein it is received in the valve seat to obstruct the outward flow of fluid through the outlet passage.