Reciprocating type fluid delivery pump

Details Reciprocating type fluid delivery pump Reciprocating type fluid delivery pump

1990-08-29

1992-05-19

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Plural pumps having separate drive motors, supply sources,...

417 18, 417 45, 4171991, 92 82, 92 87, F04B 4906, F04B 4908

Patent

active

051143143

ABSTRACT:
A reciprocating type fluid delivery pump has a driving motor, plungers for driving two pump heads, respectively, and a converting mechanism for converting the rotational motion of the driving motor into a reciprocating motion of each plunger. The converting mechanism includes a cam having such a configuration that, when the driving motor is rotated at constant velocity, the delivery flow rate during the delivery starting period of each of the plungers is in excess of that during the other periods of the cycle. The speed of rotation of the driving motor is reduced during the excess delivery period according to need. Thus, the load on the driving motor is reduced and it is therefore possible to employ a driving motor having a relatively low output. The delivery pump also includes a rinsing chamber for each plunger for allowing pressurized fluid to pass therethrough. The rinse chamber includes a rinse pump which uses the reciprocal movement of the pump piston for the rinse mechanism.

REFERENCES:
patent: 2591902 (1952-04-01), Yohpe
patent: 4352636 (1982-10-01), Patterson et al.
patent: 4359312 (1982-11-01), Funke et al.
patent: 4552513 (1985-11-01), Miller et al.
patent: 4595495 (1986-06-01), Yotam et al.

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