Sleeve pump

Details Sleeve pump Sleeve pump

1985-12-11

1987-09-01

Rolla, Joseph J.

Dispensing

With discharge assistant

With discharge volume varying means

222334, 222388, 222409, 417510, B65B 330

Patent

active

046903100

ABSTRACT:
A fluid dispensing apparatus is provided especially designed to minimize the amount of fluid retained in the apparatus during a pumping cycle. The apparatus includes a pair of concentrically aligned inner and outer tubular sleeves shiftable relative to each other for alignment of their respective inlet ports. A piston is received within the inner sleeve, and a nozzle member is axially aligned with and receivable in the inner sleeve.

REFERENCES:
patent: 2121070 (1938-06-01), Crandall
patent: 3118390 (1964-01-01), Kinsley
patent: 3149756 (1964-09-01), Carpigiani
patent: 3160331 (1964-12-01), Trumbull et al.
patent: 3227325 (1966-01-01), Bates
patent: 4293010 (1981-10-01), Winiasz
patent: 4545507 (1985-10-01), Barall

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