Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Upstream of runner
Patent
1988-03-11
1990-03-20
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Selectively adjustable vane or working fluid control means
Upstream of runner
417411, F04D 2960, F04D 2952
Patent
active
049097040
ABSTRACT:
The barrel pump has at the lower end of its housing wall a sliding sleeve which--in the open position--exposes the inlet openings at the lower end of the housing wall and--in the closed position--in which it rests against a base plate, closes these inlet openings. The base plate projects in the radial direction beyond the housing wall and, consequently, closes the pump from below. Penetration by the liquid can, hence, only occur through the inlet openings provided on the periphery of the housing wall of the pump. Displacement of the sliding sleeve takes place in that at the underside of the sliding sleeve pressure pieces are provided, which in the close position project beyond the base plate downward and upon the pump being placed down due to the weight of the pump acting downward are displaced upward against the action of a spring acting on the sliding sleeve which frees the sliding sleeve from its sealing contact on the base plate and, consequently, permits entrance of the liquid through the inlet openings. When the pump is lifted, the sliding sleeve is pushed again into its closed position by the spring. Manipulating the sliding sleeve can also take place manually with the manipulating device.
REFERENCES:
patent: 3893785 (1975-07-01), Maron
patent: 3973868 (1976-08-01), Weisser
patent: 4289457 (1981-09-01), Porter
patent: 4530641 (1985-07-01), Gschwender
patent: 4668166 (1987-05-01), Lutz
Firma Karl Lutz
Garrett Robert E.
Nguyen Hoang
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