Dispensing – Processes of dispensing
Patent
1974-04-09
1976-06-08
Knowles, Allen N.
Dispensing
Processes of dispensing
222211, 222212, 222215, 2223865, B65D 3700
Patent
active
039617254
ABSTRACT:
An improved method and apparatus are provided for dispensing fluids under pressure by means of an expandable resilient bladder, wherein the bladder expands upon filling with a fluid, and the resilient character of the expanded bladder provides the pressure for expelling the fluid. The improved method comprises mechanically tensioning the bladder as the bladder is being filled with fluid, and maintaining the mechanical tensioning of the bladder at least until substantially all of the fluid is expelled therefrom. This mechanical tensioning provides a substantially uniform high pressure on the fluid throughout the dispensing of the fluid, and substantially all of the fluid may be dispensed from the apparatus. The improved apparatus for carrying out this mechanical tensioning may advantageously comprise relatively rigid telescoping members located interior of the bladder. The telescoping members are actuated by the fluid as it is being introduced into the apparatus such that the telescoping members are moved to an extended position which longitudinally tensions the bladder. Suitable means are provided for detaining the telescoping members in the extended position at least until substantially all of the fluid is dispensed from the apparatus.
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patent: 3361303 (1968-01-01), Jacuzzi
patent: 3468308 (1969-09-01), Bierman
patent: 3469578 (1969-09-01), Bierman
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patent: 3738538 (1973-06-01), Roper et al.
patent: 3767078 (1973-10-01), Gortz
patent: 3791557 (1974-02-01), Venus
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