Pumps – Motor driven – Fluid motor
Patent
1991-03-08
1993-02-09
Bertsch, Richard A.
Pumps
Motor driven
Fluid motor
417377, 417511, F04B 1700
Patent
active
051849437
ABSTRACT:
An additive injection pump has a rolling diaphragm mounted between a reciprocable assembly and a cylinder to create a secondary fluid pumping chamber in the lower end of the cylinder. The reciprocable assembly has an internal one-way flow passage between the pumping chamber and an opposite end portion of the assembly having an outlet. The selective positioning of a valve member at the bottom of the reciprocable assembly establishes a predetermined quantity of secondary fluid supplied through an inlet at the bottom of the cylinder. When the cylinder is attached to a housing having a primary fluid stream and the assembly is reciprocated by a fluid motor in the housing, secondary fluid in predetermined doses is injected into the primary fluid stream.
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Bertsch Richard A.
Frank and Robyn Walton 1990 Family Trust
Freay Charles G.
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