Two-cycle peristaltic pump

Details Two-cycle peristaltic pump Two-cycle peristaltic pump

1992-02-20

1992-11-24

Smith, Leonard E.

Pumps

Expansible chamber type

Elongated flexible chamber wall progressively deformed

417479, F04B 4312

Patent

active

051658739

ABSTRACT:
A device for pumping fluid through a resilient tube has a platen for holding the tube and a pumping mechanism for squeezing the tube against the platen. The pumping mechanism includes a first pumping finger which squeezes the tube at a first location and a second pumping finger which squeezes the tube at a second location. For their respective alternating pumping actions, the first finger is configured and operated to displace approximately twice the fluid volume displaced by the second pumping finger. A valve means is also mounted on the base and is positioned to alternately occlude the tube upstream from the first and second pumping fingers during the pumping action of the first pumping finger and to occlude the tube between the first and second locations upstream from the second pumping finger during the pumping action of the second pumping finger.

REFERENCES:
patent: 4039269 (1977-08-01), Pickering
patent: 4199307 (1980-04-01), Jassawalla
patent: 4236880 (1980-12-01), Archibald
patent: 4273121 (1981-06-01), Jassawalla
patent: 4382753 (1983-05-01), Archibald
patent: 4479797 (1984-10-01), Kabayashi et al.
patent: 4586882 (1986-05-01), Tseng
patent: 4650469 (1987-03-01), Berg et al.
patent: 4657490 (1987-04-01), Abbott
patent: 4840542 (1989-06-01), Abbott
patent: 4846637 (1989-07-01), Alderson et al.
patent: 5017059 (1991-05-01), Davis

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