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:
Sep. 28, 1976
Filed:
Oct. 04, 1974
David A Pickett, Warren, MI (US);
Allied Chemical Corporation, Morris Township, NJ (US);
Abstract
An electrically-operated pressure control apparatus is adapted to perform switching and actuating functions and is capable of operating in response to high pressure or in response to an absence of pressure, that is, a vacuum. The apparatus includes: a first pressure conduit, a second pressure conduit, a third pressure conduit, a coil assembly and an armature assembly. The armature assembly is adapted to be operated electromagnetically when the coil assembly is energized. The armature assembly includes a sealing lever, an armature lever, a return spring, and a pivot means. The sealing lever has sealing means, preferably at one end thereof, adapted to open and close a first passageway in the first pressure conduit, and adapted to close and open a second passageway in the second pressure conduit. The effective, operating length of the armature lever is greater than the effective, operating length of the sealing lever. As a result, the armature assembly has a mechanical advantage resulting from the ratio of the length of the armature lever to the length of the sealing lever.