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. 12, 1992
Filed:
Jul. 11, 1991
Applicant:
Inventor:
Roland J Frase, Roselle, IL (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01P / ;
U.S. Cl.
CPC ...
1231 / ; 123 4115 ;
Abstract
Fluid pressures in an internal combustion engine are monitored by two diaphragm operated valves and open either valve when abnormal pressures are sensed to shut down the engine. Each valve is a sleeve valve slidable on a stem and normally latched to the stem. The stem carries a reset button and is spring biased to hold the valve in closed position. A valve is released from the stem when abnormal pressures are detected and the valve is spring biased to the open position. If the reset button is held in to override the protective function, the latch release and valve opening will still occur.