Patent US4798521A successfully refreshed from Google Patents.
US4798521A
Expired / Lapsed
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System and method for regulating pressure in a container
Assignee: Balzers und Leybold Deutschland Holding AG
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Filing: 1987-05-04
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Granted: 1989-01-17
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Expires: 2007-05-04
Abstract
Abstract A system for regulating pressure in a container. The system includes a membrane pressure regulator with a reference pressure chamber containing a reference pressure, and a vacuum pump connected to the container via the membrane pressure regulator. The system further includes a gas inlet valve connected to the reference pressure chamber for increasing the reference pressure; a gas outlet valve connected to the reference pressure chamber for decreasing the reference pressure; and a regulator connected to the gas inlet valve and the gas outlet valve for actuating the valves. The regulator includes a device for generating a desired pressure value for the container and a measuring member connected for providing an indication of the pressure in at least one of the reference pressure chamber and the container.
Inventors
- 👤 Lothar Schmidt
- 👤 Hans-Joachim Schumbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:32
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2013; G05D16/2026; G05D16/2046; G05D16/2053; G05D16/2093; G05D16/2095; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/7722; Y10T137/7758; Y10T137/7761
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
152 words
In a system for regulating pressure in a container and having a membrane pressure regulator with a reference pressure chamber containing a reference pressure and a vacuum pump connected to the container via the membrane pressure regulator, the improvement comprising: a gas inlet valve connected to said reference pressure chamber for increasing the reference pressure; a pressure decreasing means connected to said reference pressure chamber for decreasing the reference pressure; and a regulator means connected to said gas inlet valve and said pressure decreasing means for actuating said valve and said pressure decreasing means, said regulator means including a desired value generating input means for generating a desired pressure value for said container and measuring means including a first measuring member connected to the container for measuring the pressure in the container and a second measuring member connected to the reference pressure chamber for measuring the pressure in the reference pressure chamber.
Claim 2
Dependent Claim
152 words
In a system for regulating pressure in a container and having a membrane pressure regulator with a reference pressure chamber containing a reference pressure and a vacuum pump connected to the container via the membrane pressure regulator, the improvement comprising: a gas inlet valve connected to said reference pressure chamber for increasing the reference pressure; a pressure decreasing means connected to said reference pressure chamber for decreasing the reference pressure; and a regulator means connected to said gas inlet valve and said pressure decreasing means for actuating said valve and said pressure decreasing means, said regulator means including a desired value generating input means for generating a desired pressure value for said container and measuring means including a first measuring member connected to the container for measuring the pressure in the container and a second measuring member connected to the reference pressure chamber for measuring the pressure in the reference pressure chamber.
Claim 3
Dependent Claim
24 words
System as defined in claim 1, and further comprising a supply of inert gas connected to the intake side of said gas inlet valve.
Claim 4
Dependent Claim
44 words
System as defined in claim 1, wherein said pressure decreasing means is a choke and said gas inlet valve is a dynamically regulatable gas inlet valve, and said regulator means is connected solely to said dynamically regulatable gas inlet valve for actuating such valve.
Claim 5
Dependent Claim
16 words
System as defined in claim 1, wherein said pressure decreasing means is a gas outlet valve.
Claim 6
Dependent Claim
17 words
System as defined in claim 4, wherein said gas outlet valve is connected to the vacuum pump.
Claim 7
Dependent Claim
21 words
System as defined in claim 4, and further comprising a separate vacuum pump to which said gas outlet valve is connected.
Claim 8
Dependent Claim
16 words
System as defined in calim 4, wherein said gas inlet and outlet valves are open-shut valves.
Claim 9
Dependent Claim
16 words
System as defined in calim 4, wherein said gas inlet and outlet valves are open-shut valves.
Claim 10
Dependent Claim
110 words
In a method for regulating pressure in a container of a system having a membrane pressure regulator with a reference pressure chamber containing a reference pressure, and a vacuum pump connected to the container via the membrane pressure regulator, the method comprising: measuring the pressure in the container and the reference pressure chamber; comparing the measured pressures with a desired pressure for the container; and controlling the pressure in the reference pressure chamber, via at least one of a gas inlet valve and a gas outlet valve connected to the reference pressure chamber, in dependence on the comparison between the measured actual pressure and the desired pressure for the container.
Claim 11
Dependent Claim
110 words
In a method for regulating pressure in a container of a system having a membrane pressure regulator with a reference pressure chamber containing a reference pressure, and a vacuum pump connected to the container via the membrane pressure regulator, the method comprising: measuring the pressure in the container and the reference pressure chamber; comparing the measured pressures with a desired pressure for the container; and controlling the pressure in the reference pressure chamber, via at least one of a gas inlet valve and a gas outlet valve connected to the reference pressure chamber, in dependence on the comparison between the measured actual pressure and the desired pressure for the container.
Claim 12
Dependent Claim
107 words
Method according to claim 8, wherein said measuring step comprises measuring the pressure in the reference pressure chamber and said controlling step includes controlling the pressure in the reference pressure chamber until it reaches the desired pressure; and further comprising: measuring, subsequent to said controlling step, the pressure in the container; determining a new desired reference pressure in dependence on a deviation between the desired pressure and the measured pressure in the container; and regulating, via said at least one of a gas inlet valve and gas outlet valve, the pressure in the reference pressure chamber to set the reference pressure to the new desired reference pressure.
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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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |