Sealless modular positive displacement dispenser

Details Sealless modular positive displacement dispenser Sealless modular positive displacement dispenser

1991-07-17

1993-10-26

Le, Mark T.

Dispensing

With discharge assistant

With discharge volume varying means

222 52, 222372, 403341, 403348, F16D 100, B05C 1100

Patent

active

052558274

ABSTRACT:
Modular positive displacement apparatus for dispensing precise quantities of a fluid product including a dispensing unit and an actuator unit. A housing of the dispensing unit defines a reservoir which contains the product under pressure. Within the housing is a ball-type closure mechanism. A deformable diaphragm isolates the reservoir from the mechanism which actuates the valve to prevent undesirable entry of the product. The diaphragm may be of a number of shapes, depending upon the length of the stroke desired for the ball mechanism. The dispensing unit is readily removable from the actuator unit and can be readily replaced with another dispensing unit. Different nozzle sizes can also be accommodated. The extent of the closure opening is adjustable in discrete increments.

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patent: 4756639 (1988-07-01), Hoshino
patent: 4953756 (1990-09-01), Breault et al.
"Operating Instructions--725D Diaphragm Valve" 1983, Electron Fusion Devices, Inc, pp. 1-16.
High Performance, High Reliability Dispensing Valves, Iwashita Engineering, Inc. (sell sheet), Catalog No. 322 USA, Sep. 1987.

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