Fluid pumping assembly having a lubrication circuit functioning

Details Fluid pumping assembly having a lubrication circuit functioning Fluid pumping assembly having a lubrication circuit functioning

1991-08-19

1992-12-01

Smith, Leonard E.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

184 617, F04B 2708

Patent

active

051674920

ABSTRACT:
A fluid pumping assembly including a control valve mounted in a control valve boss having an inlet exposed to the elevated discharge pressure of the discharge chamber and an outlet exposed to the reduced pressure of the crank case. The control valve is responsive to pressure differentials between the crank case and the discharge chamber and provides a fluid path between the crank case and the discharge chamber to allow lubricating fluid from the discharge chamber to be injected into the crank case through the fluid path provided by the control valve under the influence of the pressure differential existing between the crank case and the discharge chamber. The control valve boss partially bifurcates the discharge chamber to form first and second reservoirs such that oil is disposed on either side of the control valve boss in the first and second reservoirs. The assembly further includes an oil pick-up tube providing fluid communication between the control valve inlet and both the first and second oil reservoirs on either side of the control valve boss for delivering oil from both of the first and second reservoirs to the control valve inlet independent of the orientation of the fluid pumping assembly.

REFERENCES:
patent: 920421 (1909-04-01), Boland
patent: 3587406 (1971-06-01), Gannaway et al.
patent: 4283997 (1981-08-01), Takahashi et al.
patent: 4290345 (1981-09-01), Hiraga et al.
patent: 4392788 (1983-07-01), Nakamura et al.
patent: 4428718 (1984-01-01), Skinner
patent: 4432702 (1984-02-01), Honzawa et al.
patent: 4621983 (1986-11-01), Thomas et al.
patent: 4815358 (1989-03-01), Smith
patent: 4872814 (1989-10-01), Skinner et al.

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