Dispensing – With cleaning means
Patent
1977-12-14
1979-07-03
Spar, Robert J.
Dispensing
With cleaning means
222183, 2223865, 22240218, B65D 8314
Patent
active
041597893
ABSTRACT:
A pressurized dispenser includes an apertured vessel having a pressure chamber. An impervious sack of flexible material is nested within the chamber holding a fluid-like material to be dispensed. A neck as an integral part of said sack has a bore, projects through and is secured to said vessel and suspends the sack within the vessel, said neck defining a valve housing. A valve retainer encloses and overlies said neck and is secured to the vessel and contains an apertured primary valve gasket which is sealed over the neck and includes an apertured valve seat. A movable dispensing valve stem extends into the neck bore and projects out through the retainer and includes a valve stem normally biased against the valve seat and a nozzle. Pressurized gas is sealed within the pressure chamber for applying continuous pressure over the sack so that manual unseating of the valve stem releases controlled quantities of a fluid-like material through the neck, valve stem and nozzle. A modification includes normally-closed bleed passages formed in the neck interconnecting the pressure chamber and the neck bore for releasing limited quantities of pressurized gas through the nozzle for clearing the nozzle passage of residue material. The valve retainer, primary valve gasket, valve stem, together with a product-sealing gasket, a bleeder disc and a spring, provide a component assembly of universal construction adapted for use with substantially all pressurized dispensers and assembled sacks regardless of the size of the sack.
REFERENCES:
patent: 3497112 (1970-02-01), Samuelson
patent: 3520450 (1970-07-01), Prussin et al.
patent: 3525456 (1970-08-01), Prussin et al.
patent: 3583606 (1971-06-01), Ewald
patent: 3610481 (1971-10-01), Maraffino
patent: 3653553 (1972-04-01), Prussin et al.
patent: 3731854 (1973-05-01), Casey
patent: 3738538 (1973-06-01), Roper et al.
patent: 3982668 (1976-09-01), Riccio
patent: 4032064 (1977-06-01), Giggard
Silverberg Fred A.
Spar Robert J.
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