Dispensing – With lock or fastening seal – Inhibiting actuation of discharge assistant
Patent
1996-11-13
1998-09-15
Bomberg, Kenneth
Dispensing
With lock or fastening seal
Inhibiting actuation of discharge assistant
2223213, 2223219, B67D 542
Patent
active
058067213
ABSTRACT:
A push-type dispenser, in which the primary valve has a rod extending in the piston, and the secondary valve is mounted on the primary valve, is provided in the piston and can move in interlock with the primary valve due to the friction between it and the primary valve. A stopper formed on the piston and located above the secondary valve kicks the secondary valve, releasing the secondary valve from interlock with the primary valve and pushing the secondary valve downwards along with the piston. The secondary valve is closed with a delay after the nozzle head and the piston start moving upward. The primary valve is prevented from opening until the secondary valve is closed, thereby to suck the residual liquid back into the cylinder from the nozzle and the piston.
REFERENCES:
patent: 3062416 (1962-11-01), Cooprider
patent: 3228571 (1966-01-01), O'Donnell et al.
patent: 3248022 (1966-04-01), Schulman et al.
patent: 3359917 (1967-12-01), Cooprider
patent: 3362344 (1968-01-01), Duda
patent: 3877616 (1975-04-01), Stevens
patent: 4930670 (1990-06-01), Kuo
patent: 5096094 (1992-03-01), Guilbert
patent: 5673824 (1997-10-01), Evans
patent: 5687878 (1997-11-01), Smith et al.
Bomberg Kenneth
Canyon Corporation
LandOfFree
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