Patent CA917358A successfully refreshed from Google Patents.
US4493350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for removing air from hermetic, automatically emptying centrifuge drums
Assignee: GEA Mechanical Equipment GmbH
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Filing: 1983-03-28
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Granted: 1985-01-15
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Expires: 2003-03-28
Abstract
Abstract A device for removing air from hermetically sealed, automatically emptying centrifuge drums and consisting of an air-removal valve atop a reservoir with a manometric switch and a level-sensitive switch and connected to controls. The controls open the valve when the pressure in the reservoir exceeds a predetermined level and close it when the pressure drops below that level. The valve closes however, as soon as the level of the liquid in the reservoir reaches the level-sensitive switch. The device, which is preferably mounted in the product intake of a hermetically sealed, automatically emptying centrifuge, allows air to be removed automatically without allowing product to escape, foam to form, or oxygen to enter. The reservoir can be thoroughly cleaned automatically.
Inventors
- 👤 Alfons G. Beikel
- 👤 Harald Jarosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:01
CPC Classifications
B; B04; B04B; B04B15/00; B04B15/08; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7297
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
In a device for removing air from a system having a supply line and a removal line and including an air-removal valve in the supply line, the improvement comprising: an air-removal reservoir connected to the supply line and having a manometric switch and a level-sensitive switch thereto and having a head portion, wherein the air-removal valve is connected to the head portion of the reservoir and control means connected to the switches and the air-removal valve for opening the air-removal valve when the pressure in the reservoir exceeds a predetermined level and closing the air-removal valve when the pressures drops below the level and maintaining the valve closed whenever the level of the liquid in the reservoir reaches the level of the level-sensitive switch regardless of the pressure level in the reservoir.
Claim 2
Dependent Claim
132 words
In a device for removing air from a system having a supply line and a removal line and including an air-removal valve in the supply line, the improvement comprising: an air-removal reservoir connected to the supply line and having a manometric switch and a level-sensitive switch thereto and having a head portion, wherein the air-removal valve is connected to the head portion of the reservoir and control means connected to the switches and the air-removal valve for opening the air-removal valve when the pressure in the reservoir exceeds a predetermined level and closing the air-removal valve when the pressures drops below the level and maintaining the valve closed whenever the level of the liquid in the reservoir reaches the level of the level-sensitive switch regardless of the pressure level in the reservoir.
Claim 3
Dependent Claim
17 words
The device according to claim 1, wherein the manometric switch has an upper and a lower setting.
Claim 4
Dependent Claim
36 words
The device according to claim 2, wherein the control means opens the air-removal valve when the upper setting of the manometric switch is exceeded and closes the valve when the pressure drops below the lower setting.
Claim 5
Dependent Claim
22 words
The device according to claim 1, wherein the level-sensitive switch is mounted at a distance below the head of the air-removal reservoir.
Claim 6
Dependent Claim
31 words
The device according to claim 1, wherein the control means includes means for opening the air-removal valve independent of the pressure and level in the air-removal reservoir to effect automatic cleaning.
Claim 7
Dependent Claim
37 words
The device according to claim 1, wherein the system comprises a hermetically sealed, automatically emptying centrifuge drum in which rotating drum space is connected to and sealed off from non-moving supply and removal lines in mechanical seals.
Claim 8
Dependent Claim
21 words
The device according to claim 6, wherein the air-removal valve has an independent connection to a cyclone head of the centrifuge.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |