Dual stroke drive mechanism for pumps

Details Dual stroke drive mechanism for pumps Dual stroke drive mechanism for pumps

1978-03-08

1980-01-22

Staab, Lawrence J.

Machine element or mechanism

Elements

Eccentric

74 40, 92 137, G05G 100

Patent

active

041843835

ABSTRACT:
The present invention is concerned with a dual stroke drive mechanism of any size for a reciprocating device, such as a piston of a pump. It is particularly concerned with such a driving mechanism having means for selecting a particular stroke-length. It is more specifically concerned with a drive mechanism capable of imparting either one of two set stroke-lengths and means for selecting one of the stroke lengths before, or at certain intervals during, operation of the mechanism. The drive mechanism converts rotary movement of an input member into reciprocating rectilinear movement of an output member which may be connected to a piston and reciprocates the latter. A preferred application is in the field of sampling pumps for distributing liquid samples of small sizes into vials for analysis.

REFERENCES:
patent: 1524519 (1925-01-01), Joncha
patent: 1990184 (1935-02-01), Greenwald
patent: 2583864 (1952-01-01), Malmsten
patent: 2807213 (1957-09-01), Rosen
patent: 3312170 (1967-04-01), Brailsford

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