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:
Jul. 05, 1994
Filed:
Dec. 04, 1992
Donald B Hunter, Ontario, CA (US);
William J Cox, Pomona, CA (US);
Other;
Abstract
A seismic shut off valve includes a cripple column responsive to seismic movement. A toggle spring overlies the cripple column. Latch pins extend from the toggle spring into a valve body to hold a popper valve in an open position. During an earthquake, the cripple column buckles causing the toggle spring to bow upwardly under spring force exerted on the toggle spring through the latch pins from the popper valve. The latch pins release the poppet valve which shifts to seal against a valve seat in a valve body. A ball joint connecting the valve body and cripple column allow the cripple column to be vertically aligned despite use of the valve on a non-vertical pipe.