Portable fluid pumping device

Details Portable fluid pumping device Portable fluid pumping device

1990-12-11

1992-05-26

Bertsch, Richard A.

Pumps

Ambulant, body supported, or with carrying handle

417440, 92240, F04B 3912, F16J 104

Patent

active

051162067

ABSTRACT:
A portable fluid pumping device includes a piston-cylinder drive in which the piston head is formed with a central section of smaller diameter than the cylinder, and a peripheral flexible section slidably engageable with the side wall of the piston, to thereby produce a slidable seal which obviates the need of a rolling diaphragm. The device further includes a noise-muffling construction, a relief valve presettable for presetting the degree of suction, and a detachable collection container having a cut-off valve for disconnecting the container when it is full with liquid.

REFERENCES:
patent: 2557536 (1951-06-01), Drane
patent: 3062601 (1962-11-01), Sadler
patent: 3142299 (1964-07-01), Henderson
patent: 3610782 (1971-10-01), McGuire
patent: 3776666 (1973-12-01), Ludwig
patent: 3989415 (1976-11-01), Van-Mee
patent: 4540352 (1985-09-01), Becker
patent: 4604539 (1986-08-01), Bertram
patent: 4848213 (1989-07-01), Wood

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