Shut-off device for cyclonic vacuum cleaner
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United States of America Patent
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-
Nov 5, 1991
Grant Date -
N/A
app pub date -
Jul 6, 1990
filing date -
Jul 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dual cyclonic vacuum cleaner device (10) including outer cylcone (11), inner cyclone (12), collecting receiver (13) and motor (14) and a valve (46) in a housing (38) which preferably closes a passage into an inlet scroll (27) leading to the inner cyclone when the outer cyclone is full is described. The valve rises to meet a ring stop (47) to cause the closure because of the differential pressure (.DELTA.P) between a pressure at an opening (45) and a pressure inside of the housing. The valve (46) prevents dirt laden air from entering directly into the shroud 31 which could plug the inner cyclone, put dirt in the vacuum motor and expel dirt laden air to the atmosphere.
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