US3601501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas compressor impeller and shaft assembly
Assignee: Daikin Applied Americas Inc
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Filing: 1970-02-26
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Granted: 1971-08-24
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Expires: 1990-02-26
Abstract
Abstract A centrifugal gas compressor impeller is assembled to a rotatable shaft with two friction washers having conical surfaces mating with respective opposite conical surfaces of the impeller that are concentric to a central impeller aperture through which a threaded bolt is passed and threaded into a threaded aperture at the end of the rotatable shaft. The angles of concentricity for the conical surfaces of the washer are slightly different than the angles of concentricity of the mating impeller surfaces so that a friction lock is obtained between the shaft and impeller and also the impeller and washer apertures are slightly larger than the bolt shaft diameter so that an impeller centering relative to the shaft is assured during assembly.
Inventors
- 👤 John G Johnson
- 👤 James H Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:42
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/62; F04D29/624; F01; F01D; F01D5/00; F01D5/02; F01D5/025; F04D29/26; F04D29/266; F16; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/09; F16D1/093; F16D1/095; F16B; F16B2200/00; F16B2200/40; F16B2200/403; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7009; Y10T403/7011
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
291 words
A rotatable gas compressor impeller and shaft assembly comprising, a rotatable shaft having a threaded axial bore at one end, an impeller having an axial bore therethrough and adapted to be assembled to the front of the threaded end of said shaft with a capped fastening bolt having a threaded shaft passing through the impeller axial bore and threaded into said shaft bore, the respective front and back faces of said impeller having respective first and second conical surfaces coaxial to the impeller bore and said surfaces being oppositely inclined, a first apertured friction washer adapted to receive the shaft of said bolt and to be interposed between the first conical surface of said impeller and the cap of said bolt and having a mating conical surface coaxial with its aperture adjacent the first conical surface in the assembled relation, the angle of inclination of the mating surface of the first washer being slightly different than the angle of inclination of thE first conical surface of the impeller, a friction collar washer having an aperture adapted to receive the shaft of said bolt and to be interposed between the second conical surface of said impeller and the threaded end of said shaft and having a mating conical surface coaxial with its aperture adjacent the second conical surface in the assembled relation, the angle of inclination of the mating surface of the collar slightly slightl different than the angle of inclination of the second conical surface, and the aperture of said collar adjacent the end of said shaft being counterbored for a length sufficient to receive the impeller end of the shaft partly within the collar aperture with a portion of the collar overlying and gripping the shaft in the assembled relation.
Claim 2
Dependent Claim
291 words
A rotatable gas compressor impeller and shaft assembly comprising, a rotatable shaft having a threaded axial bore at one end, an impeller having an axial bore therethrough and adapted to be assembled to the front of the threaded end of said shaft with a capped fastening bolt having a threaded shaft passing through the impeller axial bore and threaded into said shaft bore, the respective front and back faces of said impeller having respective first and second conical surfaces coaxial to the impeller bore and said surfaces being oppositely inclined, a first apertured friction washer adapted to receive the shaft of said bolt and to be interposed between the first conical surface of said impeller and the cap of said bolt and having a mating conical surface coaxial with its aperture adjacent the first conical surface in the assembled relation, the angle of inclination of the mating surface of the first washer being slightly different than the angle of inclination of thE first conical surface of the impeller, a friction collar washer having an aperture adapted to receive the shaft of said bolt and to be interposed between the second conical surface of said impeller and the threaded end of said shaft and having a mating conical surface coaxial with its aperture adjacent the second conical surface in the assembled relation, the angle of inclination of the mating surface of the collar slightly slightl different than the angle of inclination of the second conical surface, and the aperture of said collar adjacent the end of said shaft being counterbored for a length sufficient to receive the impeller end of the shaft partly within the collar aperture with a portion of the collar overlying and gripping the shaft in the assembled relation.
Claim 3
Dependent Claim
47 words
The invention of claim 1 in which said first conical surface of the impeller is inclined away from the end of said shaft in the assembled relation, and said second conical surface of the impeller is inclined towards the end of said shaft in the assembled relation.
Claim 4
Dependent Claim
56 words
The invention of claim 2 in which the angle of inclination for the mating surface of said washer is slightly greater than the angle of inclination of said first conical surface, and the angle of inclination for the mating surface of said collar is slightly greater than the angle of inclination of said second conical surface.
Claim 5
Dependent Claim
73 words
The invention of claim 1 in which the diameters of the respective apertures of said washer and collar are oversize relative to the diameter of the threaded shaft of said fastening bolt, and the diameter of the bore of said impeller is oversize relative to the diameter of the threaded shaft of said fastening bolt whereby the impeller is centered relative to said shaft by the mating conical surfaces in the assembled relation.
Claim 6
Dependent Claim
73 words
The invention of claim 2 in which the diameters of the respective apertures of said washer and collar are oversize relative to the diameter of the threaded shaft of said fastening bolt, and the diameter of the bore of said impeller is oversize relative to the diameter of the threaded shaft of said fastening bolt whereby the impeller is centered relative to said shaft by the mating conical surfaces in the assembled relation.
Claim 7
Dependent Claim
73 words
The invention of claim 3 in which the diameters of the respective apertures of said washer and collar are oversize relative to the diameter of the threaded shaft of said fastening bolt, and the diameter of the bore of said impeller is oversize relative to the diameter of the threaded shaft of said fastening bolt whereby the impeller is centered relative to said shaft by the mating conical surfaces in the assembled relation.
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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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |