04204513 is referenced by 5 patents and cites 20 patents.

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.

Title
Hydraulic safety mechanism
Application Number
5/960953
Publication Number
4204513
Application Date
November 15, 1978
Publication Date
May 27, 1980
Inventor
David G Powell
Monrovia
CA, US
William O Munroe
Rodeo
CA, US
Robert A Bilbrey
Orinda
CA, US
Agent
Fitch Even & Tabin
Assignee
California Controls Company
CA, US
IPC
F02B 77/00
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