Dual-piston pump apparatus

Details Dual-piston pump apparatus Dual-piston pump apparatus

1994-11-07

1996-01-02

Denion, Thomas E.

Expansible chamber devices

With non-sealing cleaning means

92128, 92146, 92161, 92255, 417515, 222255, 222275, F01B 3100

Patent

active

054798477

ABSTRACT:
A dual-piston pump apparatus includes a pair of reciprocating sleeves within which a pair of reciprocating pistons are disposed. The pistons and sleeves are each supported on a frame for independent reciprocating movement along a line angled relative to horizontal by an angle of less than about 60.degree.. The apparatus also includes a piston construction including a removable face which permits the piston to be broken down for cleaning. Each piston is normally restricted by a stop from extension beyond the end of the corresponding sleeve, but an actuator is provided for freeing the piston relative to the sleeve so that the piston may be extended beyond the sleeve and the sleeve may be withdrawn from a pump chamber of the apparatus.

REFERENCES:
patent: 158729 (1875-01-01), Neumeyer
patent: 1181837 (1916-05-01), Campbell
patent: 2408346 (1946-09-01), Smith
patent: 4588110 (1986-05-01), Nelson et al.
patent: 4869653 (1989-09-01), Powers et al.
patent: 5396831 (1995-03-01), Marvin et al.

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