Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Separating means
Patent
1994-12-01
1997-05-13
Terrell, William E.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Separating means
25112906, 251368, B07C 500, F16K 3102
Patent
active
056284110
ABSTRACT:
A valve device is disclosed for controlling the delivery of gas from a pressurised source suitable for use in a pneumatic ejector in particle sorting apparatus. It uses a diaphragm as a valve member disposed over an output port from a chamber which is in substantially continuous communication with a source of gas or air under pressure. Both sides of the diaphragm are exposed to pressurised gas or air in the chamber. For this reason, and because the diaphragm itself engages the output port to close it, when the input pressure is applied there is a differential pressure which elastically deforms the diaphragm to close the output port. The diaphragm has a piezoelectric element, and the valve device includes an electric circuit operable to selectively activate the piezoelectric element and withdraw the valve member from the output port to admit pressurised gas or air thereinto.
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English Translation of French Patent Application No. 2,664,671, filed Jul. 12, 1990, published Jan. 17, 1992, bulletin 92/03, for Valve and Multi-Channel Distribution Device, Particularly for Corrosive Fluids, inventors: Jean Neimark and Jacques Ponsignon.
Henderson Kenneth C.
Mills Stewart J.
Nguyen Tuan
Sortex Limited
Terrell William E.
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