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US3675294A
Expired / Lapsed
US
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Method of making a bladed rotor
Assignee: DEFENSE UK
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Filing: 1970-12-22
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Granted: 1972-07-11
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Expires: 1990-12-22
Abstract
Abstract A bladed rotor is made by a method comprising forming a plurality of similar annular wall members into an annular assembly in which there is a circumferentially extending annular recess between each adjacent pair of annular wall members, and in which there are a plurality of angularly spaced apart axially extending slots which extend to the circumference of the assembly, filling each such annular recess with fibrous material, and securing in the said slots tanged root portions of aerofoilshaped blades, the blades being formed of fibrous material and the fibers in the blades being bonded to the fibers in the recesses.
Inventors
- 👤 Jack Palfreyman
- 👤 Henry Edward Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:17
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/028; F01D5/12; F01D5/28; F01D5/282; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321; Y10T29/49801
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A method of making a bladed rotor comprising: a. forming a plurality of similar annular wall members into an annular assembly in which there is a circumferentially extending annular recess between each adjacent pair of annular wall members and in which there are a plurality of angularly spaced apart axially extending slots which extend to the circumference of the assembly, b. winding a continuous filamentary fiber coated with a liquid synthetic resin into each annular recess to fill the recess therewith and divide each slot into a row of axially spaced cavities between the ends of adjacent pairs of annular wall members, c. inserting into a row of cavities an aerofoil-shaped blade having tanged roots thereon corresponding to the spacing and dimensions of the row of spaced cavities, the aerofoil blade being formed of a fibrous material and a synthetic resin material thereby bonding each tang to the continuous filamentary fibers and the wall members surrounding its associated recess.
Claim 2
Independent Claim
159 words
A method of making a bladed rotor comprising: a. forming a plurality of similar annular wall members into an annular assembly in which there is a circumferentially extending annular recess between each adjacent pair of annular wall members and in which there are a plurality of angularly spaced apart axially extending slots which extend to the circumference of the assembly, b. winding a continuous filamentary fiber coated with a liquid synthetic resin into each annular recess to fill the recess therewith and divide each slot into a row of axially spaced cavities between the ends of adjacent pairs of annular wall members, c. inserting into a row of cavities an aerofoil-shaped blade having tanged roots thereon corresponding to the spacing and dimensions of the row of spaced cavities, the aerofoil blade being formed of a fibrous material and a synthetic resin material thereby bonding each tang to the continuous filamentary fibers and the wall members surrounding its associated recess.
Claim 3
Dependent Claim
69 words
A method according to claim 1 and further including the steps of: d. inserting filler pieces into said angularly spaced-apart axially extending slots before winding the continuous fiber filament into each annular recess, e. removing said filler pieces from said slots after the winding of the continuous filaments to leave a plurality of angularly spaced-apart axially extending rows of said cavities between the ends of adjacent annular wall members.
Claim 4
Dependent Claim
27 words
A method as claimed in claim 1 in which the said slots are formed by assembling annular wall members together and then slotting the annular wall members.
Claim 5
Dependent Claim
25 words
A method as claimed in claim 1 in which the fibrous material in the annular recesses and in the blades is fiber-reinforced synthetic resin material.
Claim 6
Dependent Claim
14 words
A method as claimed in claim 1 in which the fibers are carboniferous fibers.
Claim 7
Dependent Claim
22 words
A method as claimed in claim 1 in which the cross-sectional area of the annular recesses increases in the radially inward direction.
Claim 8
Dependent Claim
66 words
A method as claimed in claim 1 in which at each of the axially opposite ends of the said assembly there is an annular end piece which extends radially outwardly of the wall members to define therewith a shallow trough which receives circumferentially extending parts of the root portions of the blades, the parts of the trough between the root portions being filled with fibrous material.
Claim 9
Dependent Claim
33 words
The method as claimed in claim 1 in which the wall members are made of synthetic resin and are bonded together by placing said wall members in a common mould and curing them.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |