Speed regulators for internal combustion engines, particularly diesel engines, in earth movers and workers

Claim 1

An automatic speed regulator for the internal combustion engine of an earth moving machine or the like of the type having at least one hydraulically operated implement, a source of hydraulic fluid under pressure, an hydraulic pressure line connected to said implement, the means to selectively supply hydraulic fluid under pressure to said implement through said pressure line, a manually operable fuel control linkage whereby the speed of said engine may be controlled by controlling the fuel to said engine, a fuel control means the novelty comprising connecting means connecting said fuel control linkage to said fuel control means, said connecting means including extensible and retractable means, means to constantly bias said extensible and retractable means in one direction to reduce the flow of fuel to said engine to reduce the speed thereof, said extensible and retractable means including hydraulic means for biasing said extensible and retractable means to overcome the bias of said means to constantly bias said extensible and retractable means, said hydraulic means being connected to said source of hydraulic liquid under pressure when said hydraulically operated implement is supplied with fluid under pressure to operate it, and drain means for said extensible and retractable means so constructed and arranged that when fluid under pressure is not supplied to said implement, said extensible and retractable means will be biased by said means to constantly bias said extensible and retractable means to reduce the flow of fuel to said engine in order to reduce the speed thereof.