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. 14, 1989
Filed:
Sep. 03, 1985
Daniel C Stahly, Elmhurst, IL (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A three-port vacuum valve (10) having a thermally responsive actuator (38)n and a moveable valve member (62) with a single seal ring (66) thereon. A vacuum signal output port (24) is disposed between spaced primary (26) and secondary (22) vacuum source ports. A first (74) and a second (68) annular tapered valve seats are disposed in opposing relationship closely spaced adjacent said output port with said seal ring disposed therebetween. The valve seats are spaced such that upon said actuator experiencing a preselected temperature the seal ring is unseated from the second valve seat and is between the valve seats. Upon the actuator experiencing a given temperature differential from said preselected temperature, said seal ring seats against said first valve seat.