US3973865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side-channel ring compressor
Assignee: Siemens AG
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Filing: 1975-01-23
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Granted: 1976-08-10
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Expires: 1995-01-23
Abstract
Abstract The invention concerns a side-channel ring compressor in which the product of the number of blades and the speed of revolution of the impeller is chosen so that the vibrations of the medium to be pumped, which vibrations occur at the inlet and outlet openings of the compressor, are in the supersonic range.
Inventors
- 👤 Kurt Mugele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:44
CPC Classifications
F; F04; F04D; F04D23/00; F04D23/008
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
In a side-channel ring compressor for pumping a gaseous medium including an intake opening through which said medium enters said compressor, and a pressure opening out of which said medium leaves said compressor, the improvement comprising an impeller for pumping said medium and conducting said medium from said intake opening to said pressure opening, said impeller having a number of blades z chosen so that the product thereof and the operating speed n of the impeller is such that the vibration maxima of said medium at said intake and pressure openings have a frequency which lies above the hearing threshold frequency of the human ear and below 100 kHz.
Claim 2
Dependent Claim
109 words
In a side-channel ring compressor for pumping a gaseous medium including an intake opening through which said medium enters said compressor, and a pressure opening out of which said medium leaves said compressor, the improvement comprising an impeller for pumping said medium and conducting said medium from said intake opening to said pressure opening, said impeller having a number of blades z chosen so that the product thereof and the operating speed n of the impeller is such that the vibration maxima of said medium at said intake and pressure openings have a frequency which lies above the hearing threshold frequency of the human ear and below 100 kHz.
Claim 3
Dependent Claim
34 words
A compressor as recited in claim 1 in which the spacing between said blades at the hub of said impeller is less than 2mm and the thickness of said blades is less than 0.5mm.
Claim 4
Dependent Claim
16 words
A compressor as recited in claim 1 in which said blades comprise a highly elastic material.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
US3556680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |