Single valve diaphragm pump with decreased sensitivity to ambien

Details Single valve diaphragm pump with decreased sensitivity to ambien Single valve diaphragm pump with decreased sensitivity to ambien

1985-11-26

1986-06-10

Croyle, Carlton R.

Pumps

Motor driven

Electric or magnetic motor

417417, 417557, 417559, 128DIG12, 604123, 604153, 92 99, F04B 4300

Patent

active

045940584

ABSTRACT:
A single valve diaphragm pump is disclosed which generally includes: a pump housing, a flexible diaphragm reciprocally movable in the pump housing; an inlet filter means; and, an outlet valve. The flexible diaphragm conforms in shape to a portion of the pump housing when the diaphragm is in its actuation or rest position. The pump eliminates an inlet check valve and replaces it with an inlet filter means. The invented pump has a stroke volume which is extremely constant even though ambient pressure and reservoir pressure may vary over a considerable range. Furthermore, the invented pump provides a practical means for preventing gas bubbles from entering into the pump chamber. The invented pump can have application as a medication pump for use external to or implanted within a living body.

REFERENCES:
patent: 2474349 (1949-06-01), Dickey et al.
patent: 2819678 (1958-01-01), Nordell et al.
patent: 2854992 (1958-10-01), Hewitt
patent: 2856148 (1958-10-01), Heathcote et al.
patent: 3039399 (1962-06-01), Everett
patent: 3168111 (1965-02-01), Strauss
patent: 3200757 (1965-08-01), Steffes
patent: 3411704 (1968-11-01), Hilgert et al.
patent: 3868973 (1975-03-01), Bierman et al.
patent: 4021152 (1977-05-01), Toyoda
patent: 4047852 (1977-09-01), O'Connor et al.
patent: 4152098 (1979-05-01), Moody et al.

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