US3612718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bladed member for a fluid flow machine
Assignee: Rolls Royce PLC
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Filing: 1969-12-15
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Granted: 1971-10-12
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Expires: 1989-12-15
Abstract
Abstract A bladed member for a fluid flow machine comprises a plurality of angularly spaced-apart aerofoil-shaped blades whose root portions are pivotally mounted in a common blade support member, resilient means being provided for resiliently urging the blades towards predetermined relative angular positions.
Inventors
- 👤 Jack Palfreyman
- 👤 Henry Edward Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:10
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3007; F01D5/12; F01D5/22; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A bladed member for a fluid flow machine comprising: a plurality of angularly spaced-apart airfoil-shaped blades having root portions; a common blade support member; means pivotally mounting the root portion in said support member; resilient means normally urging said blades toward predetermined relative angular positions; said adjacent blades having respective telescoping inner and outer clapper parts, said telescoping inner and outer clapper parts defining within themselves a space; means to supply a fluid under pressure to said space to urge said telescoping inner and outer clapper parts of adjacent blades apart.
Claim 2
Dependent Claim
91 words
A bladed member for a fluid flow machine comprising: a plurality of angularly spaced-apart airfoil-shaped blades having root portions; a common blade support member; means pivotally mounting the root portion in said support member; resilient means normally urging said blades toward predetermined relative angular positions; said adjacent blades having respective telescoping inner and outer clapper parts, said telescoping inner and outer clapper parts defining within themselves a space; means to supply a fluid under pressure to said space to urge said telescoping inner and outer clapper parts of adjacent blades apart.
Claim 3
Dependent Claim
24 words
A bladed member as claimed in claim 1 in which said resilient means act directly on and between said root portions of adjacent blades.
Claim 4
Dependent Claim
44 words
A bladed member as claimed in claim 2 in which said resilient means between the root portions of at least two adjacent blades is at least one assembly of elastomeric balls, said assembly separating said root portions of the at least two adjacent blades.
Claim 5
Dependent Claim
40 words
A bladed member as claimed in claim 2 in which said resilient means between the root portions of at least two adjacent blades is at least one inflatable member separating said root portions of the at least two adjacent blades.
Claim 6
Dependent Claim
38 words
A bladed member as claimed in claim 1 in which the root portion of each blade has a substantially cylindrical part, the blade support member having a correspondingly shaped recess in which the substantially cylindrical part is mounted.
Claim 7
Dependent Claim
20 words
A bladed member as claimed in claim 1 comprising a rotor member of which the blade support member constitutes part.
Claim 8
Dependent Claim
99 words
A gas turbine engine compressor having a bladed member, said bladed member comprising a plurality of angularly spaced-apart airfoil-shaped blades having root portions; a common blade support member; means pivotally mounting the root portions of said blades in said support member; resilient means normally urging said blades toward predetermined relative angular positions; said adjacent blades having respective telescoping inner and outer clapper parts, said telescoping inner and outer clapper parts defining within themselves a space; and means to supply a fluid under pressure to said space to urge said telescoping inner and outer clapper parts of adjacent blades apart.
Claim 9
Dependent Claim
99 words
A gas turbine engine compressor having a bladed member, said bladed member comprising a plurality of angularly spaced-apart airfoil-shaped blades having root portions; a common blade support member; means pivotally mounting the root portions of said blades in said support member; resilient means normally urging said blades toward predetermined relative angular positions; said adjacent blades having respective telescoping inner and outer clapper parts, said telescoping inner and outer clapper parts defining within themselves a space; and means to supply a fluid under pressure to said space to urge said telescoping inner and outer clapper parts of adjacent blades apart.
Claim 10
Dependent Claim
17 words
A fluid flow machine as claimed in claim 7 in which said bladed member is a rotor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |