US3731360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a composite blade with an integrally attached root thereon
Assignee: RTX Corp
•
Filing: 1971-04-07
•
Granted: 1973-05-08
•
Expires: 1991-04-07
Abstract
Abstract A method of making a composite blade with an integral root thereon in a single compacting and bonding operation thereby to assure a secure attachment of the blocks to the fiber layers and the fiber layers together.
Inventors
- 👤 H Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:02
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49337
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
88 words
In the process of making a composite blade the steps of: assembling a plurality of layers of a composite material together forming blade half-sections, placing a wedge between the two blade half-sections at the root ends thereof, placing root blocks on opposite sides of the two blade halfsections at the root ends thereof and, compacting said layers of composite material and said root blocks together for bonding said blocks to the blade halfsections and simultaneously bonding the layers of the composite material together and the blade half-sections together.
Claim 2
Dependent Claim
88 words
In the process of making a composite blade the steps of: assembling a plurality of layers of a composite material together forming blade half-sections, placing a wedge between the two blade half-sections at the root ends thereof, placing root blocks on opposite sides of the two blade halfsections at the root ends thereof and, compacting said layers of composite material and said root blocks together for bonding said blocks to the blade halfsections and simultaneously bonding the layers of the composite material together and the blade half-sections together.
Claim 3
Dependent Claim
16 words
The process of claim 1 including the steps of simultaneously bonding the wedge to the half-sections.
Claim 4
Dependent Claim
16 words
positioning a wedge between certain of the layers at one end to spread said layers apart,
Claim 5
Dependent Claim
16 words
positioning a wedge between certain of the layers at one end to spread said layers apart,
Claim 6
Dependent Claim
19 words
mounting root blocks on opposite sides of said assemblage of fibers at the same end of the wedge and,
Claim 7
Dependent Claim
19 words
mounting root blocks on opposite sides of said assemblage of fibers at the same end of the wedge and,
Claim 8
Dependent Claim
26 words
The process of claim 1 including the step of splaying the blade half-sections apart to form a wedge-shaped space and positioning a wedge in said space.
Claim 9
Dependent Claim
38 words
The process of claim 1 including the steps of positioning said blade half-sections with the wedge therein and with the blocks in position in a bonding die and heating said die to cause the bonding to take place.
Claim 10
Dependent Claim
26 words
bonding said layers of fibers together and simultaneously bonding the wedge in position and the blocks to the outer surfaces of the outer layers of fibers.
Claim 11
Dependent Claim
26 words
bonding said layers of fibers together and simultaneously bonding the wedge in position and the blocks to the outer surfaces of the outer layers of fibers.
Claim 12
Dependent Claim
20 words
The process of claim 1 including the step of simultaneously coining the outer surfaces of the blocks to finished dimension.
Claim 13
Dependent Claim
18 words
The process of making a composite blade with a root thereon at one end including the steps of:
Claim 14
Dependent Claim
18 words
The process of making a composite blade with a root thereon at one end including the steps of:
Claim 15
Dependent Claim
43 words
The process of claim 6 with the additional step of shaping the inner surface of the blocks to conform substantially to the finished contours of the assembled layers of fibers over the wedge when said layers of fibers are compacted to finished dimension.
Claim 16
Dependent Claim
49 words
The process of claim 6 with the added steps of shaping the outer surfaces of the blocks substantially to finished dimension and, coining the outer surface of said blocks to finished dimension simultaneously with the bonding and compacting of the fiber layers together and the blocks and wedge thereto.
References Cited (Backward Citations)
US2749029A
Cited
US2767460A
Cited
US2754570A
Cited
US2856675A
Cited
US3132841A
Cited
US3292245A
Cited
US3664764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |