Injection pump

Details Injection pump Injection pump

1982-09-13

1984-08-07

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

91222, 91275, F04B 910

Patent

active

044640986

ABSTRACT:
An improved injector pump (10) is the subject matter of this application. The pump (10) includes a piston (44) freely disposed for reciprocation within a chamber (32). The piston (44) has an aperture (62) extending axially therethrough. A valve member (96) is disposed within the aperture (62) for rotation therein. Means are provided for rotating the valve member (96) between first and second positions, and operating fluid is channeled to opposite sides of the piston (44) depending upon the position of the valve member (96). Means (114, 118, 122, 124) are provided to move the valve member (96) between its first and second positions. Plungers (50, 52) extend in opposite axial directions from the piston (44) to effect pumping of the product fluid.

REFERENCES:
patent: 133784 (1872-12-01), Lamb
patent: 245310 (1881-08-01), Morison
patent: 1447962 (1923-03-01), Callaghan
patent: 1922513 (1933-08-01), Wiedmann
patent: 1953454 (1934-04-01), Wollaeger
patent: 2462571 (1949-02-01), Thompson et al.
patent: 2619038 (1952-11-01), Davidson
patent: 2757645 (1956-08-01), Le Clair
patent: 2960971 (1960-11-01), Tear
patent: 3299826 (1967-01-01), Williams
patent: 3304126 (1967-02-01), Rupp et al.
patent: 3421448 (1969-01-01), Brewer et al.
patent: 3556688 (1971-01-01), Hammelmann et al.
patent: 3622250 (1971-11-01), Conlee

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