US3619448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an aerofoil-shaped blade
Assignee: Rolls Royce PLC
•
Filing: 1969-05-06
•
Granted: 1971-11-09
•
Expires: 1989-05-06
Abstract
Abstract A method of making an aerofoil-shaped blade comprising positioning a pair of laminar members to provide a gap therebetween, the opposite sides of the blade profile being respectively provided on the said laminar members, thereafter winding fibrous material through the said gap, in a longitudinal direction with respect to the blade being formed and forming the assembly of laminar members and fibrous material into an aerofoil-shaped blade.
Inventors
- 👤 Jack Palfreyman
- 👤 Henry Edward Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:16
CPC Classifications
B; B29; B29C; B29C69/00; B29C69/001; B29C69/002; B29C53/00; B29C53/80; B29C53/82; B29C53/821; B29C53/822; B29C53/828; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/34; B29C70/345; B29C70/347; B29D; B29D99/00; B29D99/0025; B29D99/0028; C; C22; C22C; C22C47/00; C22C47/02; C22C47/06; C22C47/062; C22C47/064; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; B22; B22F; B22F2998/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
29 words
A method as claimed in claim 1 including reinforcing the laminar members with a fibrous material prior to positioning of the laminar members between the portions of the mould.
Claim 2
Dependent Claim
26 words
A method as claimed in claim 2 in which the reinforcing of the laminar members with the fibrous material is accomplished by cross-weaving the fibrous material.
Claim 3
Dependent Claim
30 words
A method as claimed in claim 2 including initially moulding the laminar members on a former and thereafter reinforcing the laminar members by winding the same with the fibrous material.
Claim 4
Dependent Claim
26 words
A method as claimed in claim 1 including temporarily positioning a meltable filler member in the gap in spaced relationship with both of said laminar members.
Claim 5
Dependent Claim
23 words
A method as claimed in claim 5 including removing the filler member by melting the same after the aerofoil-shaped blade has been formed.
Claim 6
Dependent Claim
40 words
A method as claimed in claim 1 including positioning a honeycomb filler member in the gap in spaced relationship with both of said laminar members and permanently retaining the filler member in position by the forming of the aerofoil-shaped blade.
Claim 7
Dependent Claim
25 words
A method as claimed in claim 1 in which the fibrous material is impregnated with a resin, the resin impregnation bonding the laminar members together.
Claim 8
Dependent Claim
46 words
A method as claimed in claim 1 including positioning a plurality of pairs of laminar members on a common rotary member with the gaps of said pairs being aligned, and winding the fibrous material longitudinally and successively through the aligned gaps until the gaps are filled.
Claim 9
Dependent Claim
42 words
A method as claimed in claim 1 including mounting parts corresponding to platform and root portions of the blade in the mould prior to moulding and bonding these parts to the remaining part of the blade during the forming of the blade.
Claim 10
Dependent Claim
15 words
A method as claimed in claim 1 in which the fibrous material is carboniferous material.
Claim 11
Dependent Claim
39 words
A method as claimed in claim 1 including positioning a foamed member in the gap in spaced relationship to both of said laminar members and permanently retaining the foamed member in position by the forming of the aerofoil-shaped blade.
References Cited (Backward Citations)
US2937805A
Cited
US2879196A
Cited
US2929755A
Cited
US3215762A
Cited
US3518338A
Cited
US3263289A
Cited
US3349157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |