Oil pump device of an engine

Details Oil pump device of an engine Oil pump device of an engine

1989-12-15

1990-12-04

Cross, E. Rollins

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

123196W, 415111, 184 31, F02B 7700

Patent

active

049745620

ABSTRACT:
A lubricating oil pump device of an engine comprises an upper and a lower pump case and a rotary pumping mechanism of the internal-gear, one-tooth difference type housed within a housing formed between the upper and lower pump cases. Both the pump cases have oil reserving oil sumps formed therein, thereby to reserve some oil in the pump device even when the engine is stopped for a long period. Then, when the engine is restarted and the pumping mechanism operates, the oil thus reserved in the oil sumps is contacted by the moving pumping mechanism and is induced out to form oil films on the surfaces of the pump cases and of the pumping mechanism. Thus instant lubrication and sealing for effective suction are assured.

REFERENCES:
patent: 4087211 (1978-05-01), Pochyly
patent: 4545741 (1985-10-01), Tomioka et al.
patent: 4664228 (1987-05-01), Hashigaki
patent: 4911119 (1990-03-01), Ohno et al.

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