Fishing – trapping – and vermin destroying – Vermin destroying – Fumigators
Patent
1997-03-18
2000-04-11
Lavinder, Jack W.
Fishing, trapping, and vermin destroying
Vermin destroying
Fumigators
A01M 1300
Patent
active
060474971
ABSTRACT:
A method and system are disclosed for fumigating at least one region with a non-flammable gaseous mixture including phosphine. A sensor senses the concentration of phosphine for atmosphere of the region and a flow controller controls flow to the region in response to the sensed concentration. A recycling passage removes a portion of the atmosphere from the region and returns the atmosphere to create a recycle flow through the region. In addition, a gas mixing system is provided to supply the non-flammable mixture by mixing phosphine from a phosphine source and an inert substance from an inert substance source.
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Schmidt Carl W.
Six Sloane R.
Smithyman Dennis
Lavinder Jack W.
The BOC Group Inc.
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