Cyclically operable dispenser providing a double closure between

Details Cyclically operable dispenser providing a double closure between Cyclically operable dispenser providing a double closure between

1978-03-13

1980-10-28

Spar, Robert J.

Dispensing

With casing or support

For bottom discharge dispenser supported on horizontal surface

222440, 222448, 222449, 222547, G01F 1128

Patent

active

042302390

ABSTRACT:
Apparatus for dispensing flowable particulate materials from a storage container while protecting the material from unnecessary exposure to ambient atmosphere through a double vapor control mechanism. The apparatus includes a funnel unit mounted below the container for receipt of particulate material therefrom. A flow control disc is mounted between the container and the funnel unit to control the flow of material into the funnel unit, irrespective of the head of material within the funnel. A hollow, moveable, metering bell, and moveable funnel outlet closure are mounted on a common reciprocable rod within the funnel and are normally seated between cycles to provide double isolation of the material from the ambient atmosphere. The metering bell is arranged to be raised by the reciprocable rod in conjunction with a cam mechanism a predetermined, and adjustable, height above the bottom of the funnel unit to permit the particulate material to flow around the bell into the bottom of the funnel until the material reaches its angle of repose. The reciprocable rod is arranged to be pulled downward manually to cause the bell to trap a measured quantity of particulate materials within a dispensing chamber formed between it and the bottom of the funnel. Continued downward movement of the rod moves the closure out of the funnel outlet to enable the material trapped within the dispensing chamber to drop thereout and into a receiving vessel. Release of the rod carries the closure back into the funnel outlet to seal the now empty dispensing chamber. An actuable mechanism is provided to return the bell to the same, or new position, above the bottom of the funnel unit to recharge the apparatus for the next dispensing cycle.

REFERENCES:
patent: 1988865 (1935-01-01), Campbell
patent: 2054881 (1936-09-01), Saunders
patent: 2585299 (1952-02-01), Cook
patent: 2655290 (1953-10-01), Mansperger
patent: 2751128 (1956-06-01), Prince
patent: 2778529 (1957-01-01), Appel
patent: 2852170 (1958-09-01), Reynolds
patent: 3101159 (1963-08-01), Fletcher
patent: 3938639 (1976-02-01), Birrell

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