Sliding seal pump

Details Sliding seal pump Sliding seal pump

1992-11-25

1994-01-11

Bertsch, Richard A.

Pumps

Expansible chamber type

Having pulsation dampening fluid receiving space

417545, F04B 1100

Patent

active

052775593

ABSTRACT:
A precompression pump is disclosed with a sliding inlet valve seal. In a first embodiment, the valve seal has sealing and retention surfaces which interact with sealing and retention surfaces on a bead on the inner wall of the pump chamber, to seal the pump inlet and retain the inlet seal respectively. In a second embodiment, the seal has friction tabs which engage the outer wall of the pump chamber. On the upstroke of the piston, these tabs engage a bead on the inner wall of the pump chamber, causing the tabs to rotate about a hinge, increasing the outer diameter of the seal. The result is improved frictional engagement of the seal with the inner wall, resulting in improved retention of the seal.

REFERENCES:
patent: 3331559 (1967-07-01), Fedit
patent: 3669151 (1972-06-01), Fleming
patent: 4144987 (1979-03-01), Kishi
patent: 4389003 (1983-06-01), Meshberg
patent: 4986453 (1991-01-01), Lina et al.
patent: 5096097 (1992-03-01), Lina

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