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AssigneeMikuni Kogyo Kabushiki Kaisha
InventorsOsamu Mukai, Akira Miyatani, Kokichi Fukuzawa, Yoshiro Nagao, Kenichi Kubota, Masakuni Shibuya, Shigelu Kobayashi
Estimating the term…
A lubricating oil pump comprising a distributor rotatably fitted in a cylinder chamber of a pump body, a plunger fitted to said distributor for the purpose of forming a pump chamber between said distributor and said plunger, said plunger being rotatable integrally with said distributor in rotational direction but being capable of performing relative movement in thrust direction in respect to said distributor, a cam and protuberance formed on one end face of said plunger, and a cam shaft comprising a cylindrical guide-column portion and control cam portion respectively engageable with said cam and protuberance for the purpose of controlling the stroke of said plunger, said lubricating oil pump thereby making it possible to manufacture at a low cost, being capable of maintaining high pumping efficiency and making it possible to control the delivery.
A lubricating oil pump comprising a pump body having a cylinder chamber, suction port and at least one delivery port, a distributor rotatably fitted in said cylinder chamber and having a blind hole in the inside thereof, a plunger slidably fitted in said blind hole and having a cam on the outer end face thereof, said plunger being rotated in rotational direction integrally with said distributor about their common axis but being capable of performing relative movement in thrust direction in respect to said distributor, a cylindrical guide-column member provided to said pump body and engageable with said cam, said cylindrical guide-column member thus making said plunger perform reciprocating movement in thrust direction with respect to said distributor when said plunger is rotated, a spring applied between said distributor and plunger and biasing said plunger so that said cam is pushed against said cylindrical guide-column member, and said distributor is pushed against said pump body to prevent relative movement in thrust direction between said distributor and pump body, a pump chamber formed in said blind hole and between said distributor and plunger and communicatable with said suction port and delivery port and drive gearing within said pump cooperating with gearing on one of said plunger or distributor to rotate said plunger and distributor.
Dependencies are inferred from the claim text.