Zero net external displacement implantable pump and driver

Details Zero net external displacement implantable pump and driver Zero net external displacement implantable pump and driver

1987-11-17

1991-12-17

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

417473, 604131, 604 9, 92 47, F04B 4300, A61M 3700, A61M 500, F16J 300

Patent

active

050730940

ABSTRACT:
A zero net external displacement implantable pump for the transfer of accumulated body fluids, such as transfer of ascites fluid from the peritoneum to the vasculative system. The pump includes a pair of bellows type displacement chambers which are alternately compressed and expanded by action of a pivoted rocker member. The fluid to be transferred is drawn into the chambers on the expansion strokes and expelled on the compression strokes. The rocker member may be operated manually or power driven. Single action and double action pumps are disclosed.

REFERENCES:
patent: 5770 (1848-09-01), Deshon et al.
patent: 14690 (1909-06-01), Waddells
patent: 20045 (1858-04-01), Cumming
patent: 2334525 (1943-11-01), Zadig
patent: 3330902 (1967-07-01), Nakazawa et al.
patent: 3809087 (1974-05-01), Lewis, Jr.
patent: 4058857 (1977-11-01), Runge et al.
patent: 4265241 (1981-05-01), Portner et al.
patent: 4335835 (1982-06-01), Beigler et al.
patent: 4657530 (1987-04-01), Buchwald et al.
patent: 4657536 (1987-04-01), Dorman

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