Patent US5800579A successfully refreshed from Google Patents.
US5800579A
Expired / Lapsed
US
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Pressure balanced cyclone separator
Assignee: Precision Cutters Inc
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Filing: 1996-12-11
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Granted: 1998-09-01
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Expires: 2016-12-11
Abstract
Abstract Pressure control apparatus for a cyclone separator includes a variable air flow control valve in at least one line exiting from the separator. The air flow through that valve is adjusted in response to pressure changes in the separator. A flow control valve with adjustable bladders is preferred.
Inventors
- 👤 John G. S. Billingsley
- 👤 Lawrence D. Bush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:10
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D45/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
Pressure control apparatus for a cyclone separation device comprising a central separation chamber with porous side walls, a lower discharge opening open to the atmosphere, an upper discharge opening, a pressure sensor located in the central separation chamber, a controller for ascertaining pressure differences between a set point and the pressure in the central separation chamber, and a variable air flow control valve associated with the upper discharge opening which increases air flow therethrough in response to increased pressure in the central separation chamber sensed by the controller.
Claim 2
Dependent Claim
88 words
Pressure control apparatus for a cyclone separation device comprising a central separation chamber with porous side walls, a lower discharge opening open to the atmosphere, an upper discharge opening, a pressure sensor located in the central separation chamber, a controller for ascertaining pressure differences between a set point and the pressure in the central separation chamber, and a variable air flow control valve associated with the upper discharge opening which increases air flow therethrough in response to increased pressure in the central separation chamber sensed by the controller.
Claim 3
Dependent Claim
28 words
The pressure control apparatus of claim 1 wherein the variable air flow control valve includes flexible bladders that increase and decrease in dimension to regulate air flow therethrough.
Claim 4
Dependent Claim
24 words
The pressure control apparatus of claim 2 wherein the flexible bladders are increased or decreased in dimension by increasing or decreasing air pressure therein.
Claim 5
Dependent Claim
26 words
The pressure control apparatus of claim 3 wherein the air pressure in the flexible bladders is increased or decreased in response to outputs from the controller.
Claim 6
Dependent Claim
32 words
The pressure control apparatus of claim 2 wherein the output of the controller is connected to an air pressure transducer which controls the increase and decrease in dimension of the flexible bladders.
Claim 7
Dependent Claim
25 words
The pressure control apparatus of claim 5 wherein the air pressure transducer adjusts air pressure used to increase and decrease the dimension of the bladders.
References Cited (Backward Citations)
US3257151A
Cited
SU782836A1
Cited
GB2055633A
Cited
US4473326A
Cited
US4975100A
Cited
US5236479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |