US3797737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed rotation drum for use with a centrifugal separator for gaseous mixture
Assignee: Hitachi Ltd
•
Filing: 1971-09-10
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Granted: 1974-03-19
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Expires: 1991-09-10
Abstract
Abstract A drum structure adapted to be rotated at a high-speed for the centrifugal separation of gaseous mixture. The drum is of a composite structure comprising a first drum part and a second drum part disposed on the outer periphery of the first drum part. The latter is made of a metal which is resistant to the corrosion by the gaseous mixture while the second drum part is made of a plastic material reinforced with a large number of fibers wound and extending circumferentially. The second drum part is composed of a plurality of ring-like members each of which is shorter than the first drum part whereby the manufacture of the drum is simplified.
Inventors
- 👤 K Kadotani
- 👤 K Suzuki
- 👤 T Isogai
- 👤 Y Miyano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:03
CPC Classifications
B; B04; B04B; B04B7/00; B04B7/08; B04B7/085; B04B5/00; B04B5/08; Y; Y10; Y10S; Y10S494/00; Y10S494/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A composite high-speed rotation drum for use with a centrifugal separator for gaseous materials, said drum comprising a first drum part of a metal and a second drum part including a plurality of axially arranged annular sleeve members, each member having an axial dimension shorter than said first drum part and each member being formed of fiber-reinforced plastic material fitted onto the outer peripheral surface of said first drum part, wherein said plurality of annular members being axially adjacent to one another.
Claim 2
Dependent Claim
82 words
A composite high-speed rotation drum for use with a centrifugal separator for gaseous materials, said drum comprising a first drum part of a metal and a second drum part including a plurality of axially arranged annular sleeve members, each member having an axial dimension shorter than said first drum part and each member being formed of fiber-reinforced plastic material fitted onto the outer peripheral surface of said first drum part, wherein said plurality of annular members being axially adjacent to one another.
Claim 3
Dependent Claim
20 words
A drum as claimed in claim 1, in which said annular members are made of a carbon fiber-reinforced plastic material.
Claim 4
Dependent Claim
20 words
A drum as claimed in claim 1, in which said annular members are made of a glass fiber-reinforced plastic material
Claim 5
Dependent Claim
31 words
A drum as claimed in claim 1, in which said first drum part is made of extra super duralmin and said annular members are made of a carbon fiber-reinforced plastic material.
Claim 6
Dependent Claim
35 words
A drum as claimed in claim 1, in which some of said annular members are made of a carBon fiber-reinforced plastic material and the remaining annular members are made of a glass fiber-reinforced plastic material.
Claim 7
Dependent Claim
15 words
A drum as claimed in claim 1, in which said annular members have different thicknesses.
Claim 8
Dependent Claim
15 words
A drum as claimed in claim 1, in which said annular members have different lengths.
Claim 9
Dependent Claim
18 words
A drum as claimed in claim 1, in which said annular members have different thicknesses and different lengths.
Claim 10
Dependent Claim
21 words
A drum as claimed in claim 1, in which said fiber-reinforced plastic material of the annular members includes fibers extending circumferentially
Claim 11
Dependent Claim
17 words
A drum as claimed in claim 1, in which said first and second drum parts are cylindrically-shaped.
Claim 12
Dependent Claim
24 words
A drum as claimed in claim 1, in which said annular members are securely fitted to the outer peripheral surface of said first part.
References Cited (Backward Citations)
US618196A
Cited
DE593432C
Cited
CA473870A
Cited
US668744A
Cited
US2008037A
Cited
US2879282A
Cited
US3145174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |