Pneumatic pumping device

Details Pneumatic pumping device Pneumatic pumping device

1991-10-25

1992-10-27

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

417473, F04B 4306

Patent

active

051584395

ABSTRACT:
A pneumatic pumping device incorporating a movable valve such as a bellows, or a diaphragm, driven by air back pressure in a cylinder so that a liquid is drawn in and discharged by reciprocating movement of the movable valve, and in which surfaces contacting the liquid on the initial and external parts of the pumping device are formed of either a single substance or a compound of a fluororesin such as PTFE, PFA, CTFE in order to feed strong acid liquid or strong alkaline liquid without corrosion on components of the pumping device.

REFERENCES:
patent: 862867 (1907-08-01), Eggleston
patent: 1408208 (1922-02-01), Jones
patent: 3022737 (1962-02-01), Tuckey
patent: 3257952 (1966-06-01), McCormick
patent: 3524714 (1970-08-01), Grove et al.
patent: 3955557 (1976-05-01), Takagi
patent: 4489779 (1984-12-01), Dickerson et al.
patent: 4836756 (1989-06-01), Fukumoto

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