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. 27, 1980
Filed:
Nov. 15, 1978
Robert A Bilbrey, Orinda, CA (US);
William O Munroe, Rodeo, CA (US);
David G Powell, Monrovia, CA (US);
California Controls Company, Berkeley, CA (US);
Abstract
Three embodiments of a hydraulic safety mechanism are adapted to adjust the speed setting for an engine upon a reduction of pressure in a chamber, due for example, to loss of lubricating pressure, overspeeding of the engine or overheating, for example. In each embodiment, a speed control element for the engine is maintained in a normal operating position by a piston and cylinder combination which hydraulically blocks the chamber from the fluid drain in a normal operating position, the piston responding to reduced pressure in the chamber by communicating the chamber with the drain the piston thereby being hydraulically unlatched and permitting the speed control element to be repositioned to a reduced speed setting. A restrictive orifice, preferably of variable size and self-cleaning construction, regulates communication between the hydraulic circuit and the chamber. In another embodiment the safety mechanism includes a solenoid and accumulator chamber to adapt it for remote operation.