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:
May. 03, 1994
Filed:
May. 03, 1993
Applicant:
Inventors:
Paul D Engdahl, Santa Ana, CA (US);
Roger P Engdahl, Costa Mesa, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
74-2 ; 137 45 ; 251 65 ; 200 / ;
Abstract
An acceleration-responsive magnetic device for closing a valve or operating a switch or the like in response to a disturbance such as an earthquake. A pendulum operates to increase the length of a magnetic path, releasing a magnetic element to perform the desired actuation.