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Flexible tube pump having linear cam actuation of distributor means

  • US 4,039,269 A
  • Filed: 01/19/1976
  • Issued: 08/02/1977
  • Est. Priority Date: 01/19/1976
  • Status: Expired due to Term
First Claim
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1. A peristaltic-type metering pump comprising:

  • a. a housing;

    b. elongated tubing means supported in said housing, said tubing means including an inlet end adapted to be connected to a source of fluid to be pumped and an outlet end;

    c. an inlet plunger, an extruder plunger and an outlet plunger arranged serially in said housing in opposition to and along the length of said tubing means in said housing, said inlet, extruder, and outlet plungers being further arranged to be displaced and to thereby apply compressive forces to said tubing means;

    d. a linear actuator;

    e. primary cam means slidably mounted in said housing and responsive to said linear actuator for displacing said inlet and said outlet plungers in a predetermined timed relationship with respect to each other to thereby apply said forces to said tubing means, said primary cam means being comprised of first and second axially spaced apart sections; and

    f. secondary cam means located between said first and second sections responsive to the movement of said first cam means for displacing said extruder plunger in a predetermined time relationship with respect to the displacement of said inlet and outlet plungers, said secondary cam means being slidably mounted on said primary cam means and arranged to be displaced in one axial direction by a portion of one of said primary cam means sections and to be displaced in the opposite axial direction by the other of said primary cam means sections.

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