Oil metering pump with air purge

Details Oil metering pump with air purge Oil metering pump with air purge

1989-06-02

1990-11-20

Chambers, A. Michael

Pumps

Including separate port on noncyclic valve for venting or...

417500, 184 33, 184 35, 184 271, F05B 706

Patent

active

049715321

ABSTRACT:
A mechanical lubricating oil pump (126) includes a pump body (140) having a cylindrical chamber (142) and a reservoir (150) with an oil supply input (196) supplying oil from an oil tank (114) to the reservoir. A cylindrical rotator (144) is driven by a gear (162) and has a bore (146) receiving a piston (152) axially reciprocal therein and has a radial opening (148) in a cylindrical sidewall thereof communicating with the bore (146). The pump body (140) has an oil and air purge input first passage (168) communicating between the top of the reservoir (150) and the radial opening (148) in the rotator (144) during a first stroke at a first position of the rotator (144) during its revolution. The pump body (140) has an oil and air purge output second passage (180) communicating between a purge outlet (182) and the radial opening (148) in the rotator (144) during a second stroke at a second position of the rotator (144). The pump body (140) has an oil metering input third passage (186) communicating between the bottom of the reservoir (150) and the radial opening (148) in the rotator (144) during a third stroke at a third position of the rotator (144). The pump body (140) has an oil metering output fourth passage (188) communicating between a metered oil outlet (190) and the radial opening (148) in the rotator (144) during a fourth stroke at a fourth position of the rotator (144). Cams (192 and/or 2) cam the piston (152) and/or the rotator (144) to cause relative movement therebetween along the noted plurality of axial travel strokes changing the volume of the bore (146) during each revolution of the rotator (144). Differential stroking is provided to afford longer first and second strokes purging oil, and air if present, and shorter third and fourth strokes metering oil to an engine.

REFERENCES:
patent: 1254799 (1918-01-01), Harley
patent: 2104590 (1938-01-01), Hill
patent: 4034830 (1977-07-01), Mukai et al.
patent: 4036326 (1977-07-01), Mukai et al.
patent: 4043711 (1977-08-01), Seino
patent: 4231716 (1980-11-01), Kubota et al.
patent: 4787832 (1988-11-01), Fukasawa et al.
patent: 4797073 (1989-01-01), Kubota et al.
Mercury Marine, Brunswick Corp., Outboard Service Training Notebook, 90-90592, p. 109, 1986.

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