Handy tube pump

Details Handy tube pump Handy tube pump

1984-09-05

1985-11-12

Freeh, William L.

Pumps

Expansible chamber type

Bellows-type chamber

417480, 417440, 417503, 417511, 137150, 137147, F04B 4502, F04B 4306

Patent

active

045525153

ABSTRACT:
A tube pump for use in pumping a liquid from one place, such as a tank, to another, such as a vessel, the tube pump comprising a first tube for sucking a liquid from a tank; a second tube for allowing the sucked liquid to discharge therethrough; a connecting chamber located in the joint of the first and the second tube, where these two tubes are communicated with each other; a bellows member communicating with the connecting chamber, the bellows member being adapted to be gripped by the user's hand; the bellows member having an opening closable by a valve member; the valve member including a cap having an aperture in its center, and a cover including a stem slidably passed through the aperture, wherein the aperture is airtightly closed by the stem when no force acts on the cover but is opened when the cover is pushed downwards.

REFERENCES:
patent: 533683 (1895-02-01), Triller
patent: 1083228 (1913-12-01), Stuart
patent: 1582399 (1926-04-01), Aplander
patent: 3549015 (1970-12-01), Willinger

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