Reciprocating pump for a medication administering device

Details Reciprocating pump for a medication administering device Reciprocating pump for a medication administering device

1987-09-01

1989-02-28

Smith, Leonard E.

Pumps

Motor driven

Electric or magnetic motor

417505, 417570, 604152, F04B 1704

Patent

active

048080896

ABSTRACT:
A reciprocating pump having a fluid assembly having a fluid wing at its input side encompassing an admission line and an admission chamber. A moveable valve part of, for example, a magnetizable material is arranged in the admission chamber. A component part, for example a permanent magnet, which attracts the valve part against a valve seal is situated outside of the fluid wing. The valve part and the component part together form a magnetic spring system. An advantage of this arrangement is an extremely small dead spacing inside the fluid wing. Resulting therefrom is that gas bubbles can also be conveyed with great reliability. Also harmful interaction between the conveyed medication and the component part such as, for example, corrosion of the component part or conversions of the medication influenced by the component part, cannot occur.

REFERENCES:
patent: 2693767 (1954-11-01), Vroman
patent: 3302582 (1967-02-01), Kofink
patent: 3544065 (1970-12-01), Merceir
patent: 3974854 (1976-08-01), Kurpanek
patent: 4437815 (1984-03-01), McMullen
patent: 4482346 (1984-11-01), Reinicke
patent: 4531895 (1985-07-01), Zeck

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