Patent US4363598A successfully refreshed from Google Patents.
US4363598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage side-channel compressor
Assignee: Siemens AG
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Filing: 1980-06-09
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Granted: 1982-12-14
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Expires: 2000-06-09
Abstract
Abstract A multistage side-channel compressor including a plurality of housings for the individual compressor stages. Each of the housings consists of a pair of housing halves and are disposed axially one behind the other and are connected to each other. The improvement of the invention comprises the provision of a plurality of circumferential, radially outwardly extending cooling fins on the outer surface of each of the housing halves of the compressor disposed axially inwardly between the housing halves disposed axially outermost at the ends of the compressor.
Inventors
- 👤 Siegfried Schonwald
- 👤 Gert Hecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:32
CPC Classifications
F; F04; F04D; F04D23/00; F04D23/008; F04D29/00; F04D29/58; F04D29/582; F04D29/5826; F04D29/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A multistage side channel compressor comprising: an input stage having an input and an output, and an output stage axially coupled to the input stage, the output stage having an input which is coupled to the output of input stage and an output, in which: each stage comprises a first housing half and a second housing half, each housing half having a circumference, and the first housing half of the input stage and the second housing half of the output stage comprise a compact housing for a single stage compressor and are without cooling fins on their circumferences, and further comprising: a first plurality of radially outward extending cooling fins on the circumference of the second housing half of the input stage; and a second plurality of radially outward extending cooling fins on the circumference of the first housing half of the output stage.
Claim 2
Dependent Claim
144 words
A multistage side channel compressor comprising: an input stage having an input and an output, and an output stage axially coupled to the input stage, the output stage having an input which is coupled to the output of input stage and an output, in which: each stage comprises a first housing half and a second housing half, each housing half having a circumference, and the first housing half of the input stage and the second housing half of the output stage comprise a compact housing for a single stage compressor and are without cooling fins on their circumferences, and further comprising: a first plurality of radially outward extending cooling fins on the circumference of the second housing half of the input stage; and a second plurality of radially outward extending cooling fins on the circumference of the first housing half of the output stage.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |