Diaphragm type pump device

Details Diaphragm type pump device Diaphragm type pump device

1984-10-18

1985-12-24

Freeh, William L.

Pumps

Expansible chamber type

Valve in collapsible wall pumping member

92 99, 92102, 417274, F04B 4300

Patent

active

045603260

ABSTRACT:
A diaphragm type pump device comprising a casing having a cover in which an inlet valve is installed, a diaphragm dividing the interior of the casing into a suction chamber and a discharge chamber, a movable plate attached with the diaphragm and having a discharge valve, and a slide shaft for causing said diaphragm to reciprocatingly move through the movable plate, wherein a rubber sheet is provided to be closely in contact with the diaphragm integrally attached to the movable plate when the movable plate reaches the upper dead point so that fluid does not remain in a space formed between the diaphragm and the rubber sheet.

REFERENCES:
patent: 1327272 (1920-01-01), Dellgren
patent: 1946590 (1934-02-01), Rockwell
patent: 2712793 (1955-07-01), Holm
patent: 2895424 (1959-07-01), Tramontini
patent: 2998288 (1961-08-01), Newhouse
patent: 3039399 (1962-06-01), Everett
patent: 3186343 (1965-06-01), Schneider
patent: 3314365 (1967-04-01), Ritchie
patent: 3354831 (1967-11-01), Acker et al.
patent: 3969045 (1976-07-01), Sakai et al.
patent: 3999899 (1976-12-01), Sakai

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