Dispensing – With discharge assistant – With movable nozzle interconnected therewith
Patent
1998-07-24
2000-03-07
Shaver, Kevin
Dispensing
With discharge assistant
With movable nozzle interconnected therewith
2223212, 222341, 222385, G01F 1136, B67D 540
Patent
active
060328339
ABSTRACT:
The venting, precompression pump sprayer, includes a pump cylinder and a pump piston mounted for reciprocation within the cylinder. The piston applies a compression force to the fluid within a variable volume pump chamber. The piston has a hollow stem which serves as a discharge passage. A discharge valve seat is provided at the outlet end of the hollow stem of the piston. A discharge valve member is mounted for reciprocation within the hollow stem of the piston. The discharge valve member has a surface which is in sealing engagement with the valve seat when the pump sprayer is in the discharge closed position. Pressure is applied by the user to the spray cap member in order to reciprocate the piston and the valve member against the bias of a return spring. The discharge valve member has an elongated rod like region which extends downwardly to a valve inlet. An annular ring seal is mounted for liquid tight, sliding engagement on the discharge valve member's elongated rod like region. The ring seal engages a shoulder region of the pump housing, and provides an inlet seal when the ring seal is seated on the shoulder.
REFERENCES:
patent: 3331559 (1967-07-01), Fedit
patent: 4051983 (1977-10-01), Anderson
patent: 4230242 (1980-10-01), Meshberg
patent: 4274560 (1981-06-01), Cater
patent: 4389003 (1983-06-01), Meshberg
patent: 4606479 (1986-08-01), Van Brocklin
patent: 4735347 (1988-04-01), Schultz et al.
patent: 4923094 (1990-05-01), O'Neill
patent: 5064105 (1991-11-01), Montaner
patent: 5626264 (1997-05-01), Florez
patent: 5702031 (1997-12-01), Meshberg et al.
Parker Sheldon H.
Quinalty Keats
Shaver Kevin
LandOfFree
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