Two-stage compression vacuum pump having valved piston and power

Details Two-stage compression vacuum pump having valved piston and power Two-stage compression vacuum pump having valved piston and power

1993-09-01

1994-10-25

Gluck, Richard E.

Pumps

Successive stages

Reciprocating rigid stages

417284, 417289, 417433, 417490, 417513, F04B 3910

Patent

active

053583892

ABSTRACT:
This invention relates to a vacuum pump. The pump includes a pump housing (10) having upper and lower cylindrical, partly liquid filled, compression chambers (11 and 12 respectively) which are separated from each other and in which an upper and a lower part (14, 15) of a piston (12) is movable. The piston has a passage (21) which is provided with a check valve and which provides communication between the upper and the lower chamber (11 and 12 respectively). The upper chamber communicates, via an opening (26) which is provided with a check valve, with a liquid filled de-aeration receptacle (27). The lower chamber (12), during a part of the movement of the piston, via an inlet (33), communicates with the space being evacuated.

REFERENCES:
patent: 854954 (1907-05-01), Kohl
patent: 873528 (1907-12-01), Fleuss
patent: 1013678 (1912-01-01), Morehouse
patent: 1050767 (1913-01-01), Fleuss
patent: 2926644 (1960-03-01), Flamm
patent: 3594103 (1971-07-01), Hillis
patent: 3884597 (1975-05-01), Ito
patent: 5188519 (1993-02-01), Spuligis

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