US3918835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal cooling air filter
Assignee: RTX Corp
•
Filing: 1974-12-19
•
Granted: 1975-11-11
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Expires: 1994-12-19
Abstract
Abstract Contamination of cooling air to the turbine blades of a gas turbine is prevented by a centrifugal filter at the inlet ends of the coolant passages in the rotor.
Inventors
- 👤 George J Yamarik
- 👤 Harold M Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:40
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/081; F05; F05D; F05D2260/00; F05D2260/60; F05D2260/607
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
A rotor construction including: a blade supporting disk having a rib on one side thereof concentric to the disk, a plurality of blades on the periphery of the disk said blades having cooling passages therein, a plurality of passages in said rotor extending radially outwardly from a point radially inwardly of the rib to the periphery of the disk to supply coolant to the passages in the blades, said disk having projecting lips at the inlet end of each disk passage to minimize the entrance of foreign matter to the disk passages.
Claim 2
Dependent Claim
92 words
A rotor construction including: a blade supporting disk having a rib on one side thereof concentric to the disk, a plurality of blades on the periphery of the disk said blades having cooling passages therein, a plurality of passages in said rotor extending radially outwardly from a point radially inwardly of the rib to the periphery of the disk to supply coolant to the passages in the blades, said disk having projecting lips at the inlet end of each disk passage to minimize the entrance of foreign matter to the disk passages.
Claim 3
Dependent Claim
34 words
A rotor construction as in claim 1 in which the rib extends substantially axially and the inlet to the disk passages is located adjacent to the junction between the rib and the disk surface.
Claim 4
Dependent Claim
39 words
A rotor construction as in claim 1 in which the rib and disk are joined by a surface extending at an acute angle to the axis of the disk and the inlets to the passage are in this surface.
Claim 5
Dependent Claim
114 words
A rotor construction including: a blade supporting disk having a plurality of slots in the periphery, a row of blades mounted on and extending outwardly from the disks, said blades having roots positioned in said slots, said disk having an axially extending rib on one side of said disk at a point radially inward of the slots, a plurality of passages in said disk extending from inlets on the side of the disk carrying the rib to the slots on the periphery, said inlets being at a point radially inward of the rib, and a projecting rim on the inlet end of each passage, said rim extending outwardly from the surface of the disk.
Claim 6
Dependent Claim
114 words
A rotor construction including: a blade supporting disk having a plurality of slots in the periphery, a row of blades mounted on and extending outwardly from the disks, said blades having roots positioned in said slots, said disk having an axially extending rib on one side of said disk at a point radially inward of the slots, a plurality of passages in said disk extending from inlets on the side of the disk carrying the rib to the slots on the periphery, said inlets being at a point radially inward of the rib, and a projecting rim on the inlet end of each passage, said rim extending outwardly from the surface of the disk.
Claim 7
Dependent Claim
42 words
A rotor construction as in claim 4 in which the disk has a blending surface between the disk and rib that extends at an acute angle to the axis of the disk, and the passage inlets and rims are in this surfacE.
Claim 8
Dependent Claim
17 words
A rotor construction as in claim 5 in which the projecting rims are integral with the disks.
Claim 9
Dependent Claim
26 words
A rotor construction as in claim 4 in which the projecting rims are on the ends of annular inserts positioned in the inlets to the passages.
References Cited (Backward Citations)
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Cited
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Cited
US2763427A
Cited
US3356340A
Cited
US3362681A
Cited
US3370830A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |