Reciprocating piston fluid pump

Details Reciprocating piston fluid pump Reciprocating piston fluid pump

1993-10-14

1994-12-20

Bertsch, Richard A.

Pumps

Expansible chamber type

Biasing means effects eduction stroke of abutment driven,...

417534, 417502, 417503, 277165, 277215, F04B 2102

Patent

active

053741684

ABSTRACT:
A reciprocating piston fluid pump according to the present invention comprising: a pump driving section including a cam operated by an engine and a roller driven by the cam, the roller being provided at a lower end of a piston rod; a piston provided at an upper portion of the piston rod; a pump chamber housing the piston and divided into a piston upper chamber and a piston lower chamber by the piston, the pump chamber including a bearing opening at a central portion of the piston lower chamber, through which the piston rod extends; a rod seal retainer portion provided between the piston rod and the bearing opening of the pump chamber; a spring for urging the piston rod downwardly; oil passage means for communicating the pump upper chamber or the pump lower chamber with the bearing opening, the oil passage means being provided on an oil seal member or the piston rod; oil supply means for supplying lubricating oil to the pump driving section or the bearing opening; and at least one communication hole provided between the pump driving section and the oil supply means.

REFERENCES:
patent: 351665 (1886-10-01), Snyder
patent: 1679132 (1928-07-01), Holdsworth
patent: 2845033 (1958-07-01), Wright
patent: 3256824 (1966-06-01), Sebardt
patent: 3394941 (1968-07-01), Traub
patent: 3860250 (1975-01-01), Lundquist
patent: 4137020 (1979-01-01), Ito et al.
patent: 4151999 (1979-05-01), Ringel et al.
patent: 4179131 (1979-12-01), Nussbaumer
patent: 4286932 (1981-09-01), Nagano et al.
patent: 4911455 (1990-03-01), Edlund

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