Dispensing – With discharge assistant – With movable nozzle interconnected therewith
Patent
1999-07-28
2000-05-02
Kaufman, Joseph A.
Dispensing
With discharge assistant
With movable nozzle interconnected therewith
2223219, B65D 8854
Patent
active
060561637
ABSTRACT:
A liquid dispenser includes a hollow shank having top and bottom openings and a fluid chamber. A closure member is sealingly mounted on the top opening. A hollow piston rod has closed and open ends, an inner fluid passage, and an aperture in communication with the fluid passage. A hollow piston is sleeved movably around the piston rod and has a contact part in contact with the piston rod to seal releasably the aperture, and a skirt part. A spring seat has a top rim extending between the skirt part and the closed end to abut against the contact part to seal releasably the aperture, a top blind hole having a cross-section greater than that of the closed end of the piston rod, and a bottom portion. An upper urging unit urges downward the piston. A ball is seated at the bottom opening. A lower urging unit urges the spring seat and the ball against the closed end and the bottom opening, respectively.
REFERENCES:
patent: 2961131 (1960-11-01), Bradbury
patent: 3160182 (1964-12-01), O'Donnell
patent: 3180374 (1965-04-01), Muller
patent: 3289949 (1966-12-01), Roth
patent: 4271875 (1981-06-01), Milcos
Bui Thach
Kaufman Joseph A.
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