Dispensing – Supply containers with traps – With trap chamber cutoffs
Patent
1978-11-22
1980-09-09
Knowles, Allen N.
Dispensing
Supply containers with traps
With trap chamber cutoffs
222450, 251327, 251328, 251174, 251175, 251368, G01F 1128, F16K 300
Patent
active
042213070
ABSTRACT:
A knife gate for use in pneumatic conveying equipment is the subject of the present invention. The improved knife gate device is constructed utilizing first and second guide plates disposed in spaced apart relationship with a resilient member positioned behind each of the plates. Each plate is characterized by an opening and a planar surface extending on either side of the opening. A reciprocating gate means is disposed between the plates and places the yieldable means under compression. The gate means has an opening and a planar surface extending on at least one side of the opening. The gate means is moveable between an open position wherein all of the openings are aligned and a closed position wherein the planar surface of the gate means moves past the openings in the guide plates to close the latter.
The invention also encompasses a flow control apparatus and method wherein two of the aforedescribed knife gate devices are positioned in spaced apart relationship with first and second holding areas located between the two knife gates. In this embodiment, the gate means and corresponding guide plates are each provided with dual openings for alignment with the respective holding areas. Means is provided for moving the gate means in alternating relationship so that when one of the openings in one of the gate means is in communication with one of the holding areas, the opposite opening in the other of the gate means is in communication with the other of the holding areas.
REFERENCES:
patent: 2342482 (1944-02-01), Ohlinger
patent: 2763418 (1956-09-01), Hill
patent: 3273855 (1966-09-01), Wells
patent: 3348567 (1967-10-01), Volpin
patent: 3367625 (1968-02-01), Fortune
patent: 3446476 (1969-05-01), Scaramucci
patent: 3918471 (1975-11-01), Bedner
patent: 4130136 (1978-12-01), Garnier et al.
Knowles Allen N.
Salina Vortex Conveyor Corporation
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