Displacement pump

Details Displacement pump Displacement pump

1999-05-20

1999-12-21

Freay, Charles G.

Pumps

Expansible chamber type

Plural pumping members in single pump chamber

417498, 92 79, F04B 1300

Patent

active

06004117&

ABSTRACT:
An improved displacement pump is provided with flow path means preventing hysteresis-causing bubbles from accumulating in piston clearances.

REFERENCES:
patent: 1470863 (1923-10-01), Morse
patent: 1519478 (1924-12-01), Beaton
patent: 1760070 (1930-05-01), Kinsella
patent: 1993759 (1935-03-01), Stockmeyer
patent: 2421843 (1947-06-01), Meitzler
patent: 2867375 (1959-01-01), Petersen
patent: 2891718 (1959-06-01), Hall et al.
patent: 3249052 (1966-05-01), Karlak
patent: 3625297 (1971-12-01), Worman
patent: 3802805 (1974-04-01), Roeser
patent: 4568249 (1986-02-01), Todd
patent: 4941808 (1990-07-01), Qureshi et al.
patent: 5697287 (1997-12-01), Fassbender

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