Airfoil changeover device

Details Airfoil changeover device Airfoil changeover device

1992-03-31

1993-05-11

Denion, Thomas E.

Motors: expansible chamber type

Constantly applied motive fluid with controlled venting

Cyclically operable

91224, 91229, 91235, 91321, F01L 1502

Patent

active

052091520

ABSTRACT:
An air operated reciprocating piston pump having a differential area piston is provided with an annular shaped airfoil device having a chevron cross-section and which is located beneath the bottom air intake plate to utilize increasing air velocity at the initiation of bottom changeover in order to assure more reliable changeover.

REFERENCES:
patent: 943829 (1909-12-01), Holgate
patent: 1965064 (1934-07-01), Zwayer
patent: 2773483 (1956-12-01), Gal et al.
patent: 2846190 (1958-08-01), Saurenman
patent: 3094938 (1963-06-01), Blomeke et al.
patent: 4028014 (1977-06-01), Cocks
patent: 4214854 (1980-07-01), Roeder
patent: 4397614 (1983-08-01), Larner
patent: 4780065 (1988-10-01), Sayers
patent: 4821555 (1989-04-01), Kamata et al.
patent: 4879943 (1986-11-01), Grach
"Fast Flo Pump," Copyright 1977, Graco Inc., Form No. 307-427, Jun. 1983, 20 pp.

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