US 5,474,042 AGranted

Engine pre-oil device

OwnerMitsuharu Kanedainventor

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Abstract

A pre-oil device which uses a positive release catch/latch to allow a spring loaded piston within a resevor chamber to provide oil to an engine before the engine oil pump reaches operational levels. The solenoid which is energized to initiate the pre-oil process incorporates a slip mounting of the core to the positive release catch/latch to enhance the performance of the release and conserve energy. The device also includes an air tight mounting allowing the user to introduce pressurized air to augment the spring loading of the piston during adverse conditions. A secondary piston may be mounted within the main piston. The secondary piston recedes into the main piston under high oil pressure but applies pressure to the oil system to compensate for low pressure of the engine oil system during reduction of speed of the engine and reduced engine oil pump performance.

Claims7

Dependent claims

A pre-oil arrangement adapted for mounting on an engine having a starter and communicating with the engine oil system at a point between the engine oil pump and the critical items of the engine which require oil, and comprising, in combination:

a body, shaped generally as a hollow cylinder and having a top end cap and a bottom end cap forming a chamber;
a input/output port mounted in said top end cap for communicating said chamber with said engine oil system;
a main piston mounted within said body;
a main piston spring which urges said main piston toward said input/output port;
a ball and socket latch means which engages and maintains said main piston in a spring loaded position near said bottom end cap thereby allowing oil from said engine to fill said chamber;
a ball and socket latch release means activated upon initiation of said engine starter whereby said ball and socket latch means is positively released allowing said main piston to provide oil under pressure into said engine oil system.

3 more elements

Dependencies are inferred from the claim text.