US3693329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hub assembly for in-line centrifugal separator
Assignee: 361818 ALBERTA Ltd #300 8657 - 51 AVENUE EDMONTON ALBERTA CANADA T6E 6A8
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Filing: 1970-08-24
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Granted: 1972-09-26
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Expires: 1990-08-24
Abstract
Abstract The hub assembly comprises a cigar-shaped hub carrying vanes. The hub defines a central bore opening at the downstream end. Two or more vanes define conduits leading into the bore. The assembly is normally mounted in the inlet of a vortex tube. The vanes force the gas flow into helical paths for centrifugal separation of entrained liquid. The bore and conduits connect the low pressure zone at the axis of the vortex tube with the space exterior of the vortex tube.
Inventors
- 👤 Robin Burke Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B04; B04C; B04C3/00; B04C2003/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A hub assembly comprising: an elongate hub, having first and second ends, said hub carrying four outwardly protruding, longitudinally curved vanes defining, in combination with the hub, four peripheral, curved grooves extending lengthwise along the hub, said grooves each rotating through an angle of less than 90*, one pair of oppositely disposed vanes being thicker at their first ends than the other pair and said grooves being of substantially equal cross-sectional area; said hub defining a centrally locaTed, longitudinal bore which is open at the second end thereof and closed at the first end; each said thick vane defining a passageway connecting the first end of the bore with an opening in the outermost surface of the vane.
Claim 2
Dependent Claim
118 words
A hub assembly comprising: an elongate hub, having first and second ends, said hub carrying four outwardly protruding, longitudinally curved vanes defining, in combination with the hub, four peripheral, curved grooves extending lengthwise along the hub, said grooves each rotating through an angle of less than 90*, one pair of oppositely disposed vanes being thicker at their first ends than the other pair and said grooves being of substantially equal cross-sectional area; said hub defining a centrally locaTed, longitudinal bore which is open at the second end thereof and closed at the first end; each said thick vane defining a passageway connecting the first end of the bore with an opening in the outermost surface of the vane.
Claim 3
Dependent Claim
21 words
The hub assembly as set forth in claim 1 wherein: the hub and vanes are cast to provide an integral part.
Claim 4
Dependent Claim
34 words
The hub assembly as set forth in claim 2 wherein: the grooves are curved such that their downstream ends lie at an angle of 30* to 50* with respect to the hub''s longitudinal axis.
Claim 5
Dependent Claim
23 words
The hub assembly as set forth in claim 2 wherein: the grooves rotate through an angle selected from the range 70* to 90*.
Claim 6
Dependent Claim
42 words
The hub assembly as set forth in claim 4 wherein: the sum of the cross-sectional areas of the grooves is between 0.3 and 0.6 times the area of a circle having a diameter equal to the outside diameter of the hub assembly.
Claim 7
Dependent Claim
44 words
The hub assembly as set forth in claim 5 wherein: the hub bore is cylindrical and its diameter is between 0.2 and 0.5 times the diameter of a circle having a diameter equal to the outside diameter of the hub assembly. In the disclosure:
Claim 8
Dependent Claim
18 words
The hub assembly as set forth in claim 6 wherein: the vane passageway opens tangentially into the bore.
References Cited (Backward Citations)
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US2918139A
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US3254478A
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US3517821A
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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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |