US4141674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller for a ring compressor
Assignee: Siemens AG
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Filing: 1977-01-31
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Granted: 1979-02-27
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Expires: 1997-01-31
Abstract
Abstract An improved rotor for a side-channel compressor in which the ratio of the pressure of the compressor at zero output and the suction pressure of the compressor is greater than or equal to 1.79 and which rotor includes a plurality of spaced-apart blades having cells interposed therebetween. The improvement of the invention comprises the blades having a thickness dimension chosen so that the ratio of the blade cell volume to the sum of the blade cell volume and the blade volume is a maximum value of 0.72 and a minimum value of 0.45/(p max /p 1 -1) 2 .
Inventors
- 👤 Siegfried Schonwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:31
CPC Classifications
F; F04; F04D; F04D23/00; F04D23/008; F05; F05B; F05B2200/00; F05B2200/10; F05B2200/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
In a rotor for a side-channel compressor in which the ratio of the pressure at zero output of the compressor, p max , and the suction pressure of the compressor, p 1 , is greater than or equal to 1.79, said rotor including a plurality of spaced-apart blades having cells interposed therebetween, the improvement comprising said blades having a thickness dimension chosen so that the ratio of (a) the blade cell volume to (b) the sum of the blade cell volume and the blade volume is equal to or less than 0.72 and greater than or equal to 0.45/(p max /p 1 -1) 2 .
Claim 2
Dependent Claim
105 words
In a rotor for a side-channel compressor in which the ratio of the pressure at zero output of the compressor, p max , and the suction pressure of the compressor, p 1 , is greater than or equal to 1.79, said rotor including a plurality of spaced-apart blades having cells interposed therebetween, the improvement comprising said blades having a thickness dimension chosen so that the ratio of (a) the blade cell volume to (b) the sum of the blade cell volume and the blade volume is equal to or less than 0.72 and greater than or equal to 0.45/(p max /p 1 -1) 2 .
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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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |