Piston pump

Details Piston pump Piston pump

1998-03-23

2000-07-25

Jeffery, John A.

Pumps

Expansible chamber type

Having pulsation dampening fluid receiving space

417540, 417523, 92147, F01B 100

Patent

active

060930039

ABSTRACT:
The invention relates to a piston pump with a piston received axially displaceably in a pump bore. To improve the aspiration performance of the piston pump. A cuff with a U-shaped annular cross section is provided, the cuff is inserted into the pump bore surrounding the piston, an outer lip forms a diaphragm, which rests against a wall of the pump bore and is acted upon on its outside with ambient pressure through a venting bore. The cuff is part of a fluid storage element, which makes an additional fluid volume available to the piston pump. The diaphragm acted upon by ambient pressure creates a pumping effect, if a fluid pressure in the fluid storage element drops below ambient pressure in an intake stroke of the piston.

REFERENCES:
patent: 5213482 (1993-05-01), Reinartz et al.
patent: 5551767 (1996-09-01), Linkner, Jr.
patent: 5601345 (1997-02-01), Tackett
patent: 5628625 (1997-05-01), Dokas
patent: 5716111 (1998-02-01), Schenk et al.
patent: 5722738 (1998-03-01), Beck et al.
patent: 5823639 (1998-10-01), Zinnkann et al.
patent: 5839349 (1998-11-01), Volz

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