US3762835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foreign object damage protection for compressor blades and other structures and related methods
Assignee: General Electric Co
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Filing: 1971-07-02
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Granted: 1973-10-02
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Expires: 1991-07-02
Abstract
Abstract A filament composite compressor blade is provided with a fine wire mesh subsurface layer around its leading edge. This subsurface layer is clad with nickel. Internal mesh layers are also incorporated in the blade adjacent its leading edge. The wire mesh provides protection against impact damage by large and small foreign objects such as stones and sand. Where the subsurface mesh layer is bonded in place by a non-conductive adhesive, the adhesive in the interstices of the mesh is coated with silver and the nickel is atomically bonded to the nubs of the mesh. Also described is a novel method of incorporating the internal mesh layers in a blade formed from laminates of filament/matrix material.
Inventors
- 👤 E Farmer
- 👤 G Murphy
- 👤 R Carlson
- 👤 J Crawford
- 👤 C Salemme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B32; B32B; B32B15/00; B32B15/04; B32B15/043; B29C70/06; B29C70/08; B32B15/02; F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/147; F01D5/28; F01D5/282; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/321; F04D29/324; B29K; B29K2307/00; B32B2311/00; B32B2311/22; B32B2603/00; F05; F05D; F05D2240/00; F05D2240/20; F05D2240/30; F05D2240/303; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49337
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
202 words
A composite compressor rotor blade having a cambered airfoil portion and an attachment tang at the hub end thereof, said airfoil portion comprising elongated, small diameter filaments, having high strength and high modulus of elasticity, a lightweight matrix in which the filaments are composited, said filaments forming the major portion of said airfoil portion, a subsurface, wire mesh layer extending from one side to the other of the airfoil portion at least marginally of its leading edge and from its tip end a substantial distance toward its hub end, said wire mesh being closely woven of small diameter wire with its interstices filled with a bonding agent that is bonded to the matrix, and a hard metal cladding bonded to the airfoil in overlying relation with the subsurface wire mesh, and at least one internal layer of wire mesh of substantially the same characteristics as said subsurface layer, said internal mesh layer being generally parallel to an adjacent surface of the airfoil section with its interstices filled with a bonding agent bonded to the matrix, said internal mesh layer being adjacent the leading edge, extending from the tip end thereof a substantial distance toward the hub and having a relatively short width.
Claim 2
Dependent Claim
53 words
A blade as in claim 2 further comprising additional internal mesh layers similar to said one internal mesh layer in characteristics and disposition, the trailing edges of said internal mesh layers being offset from each other so that no more than two trailing edges are registered in the general plane of the blade.
Claim 3
Dependent Claim
33 words
A blade as in claim 2 wherein the subsurface and internal mesh layers are square woven and the wires thereof are disposed at approximately 45* relative to the leading edge of the blade.
Claim 4
Dependent Claim
131 words
A structure intended for use in an environment to which it is subject to foreign object damage, said structure comprising a non-conductive primary structure, a subsurface, closely woven, small diameter wire mesh layer bonded to said primary structure by a bonding agent filling the interstices of the wire mesh, a hard metal cladding atomically bonded to the outer nubs of the wire mesh, wherein the wire mesh is formed of tough metal wire mesh having a diameter of about 0.001 to 0.005 inches and about 20 to 60 volume percent of wire metal within the outline of the mesh layer, the wire metal is selected from the group consisting of stainless steel and titanium and its alloys the metal cladding is nickel having a thickness between about 0.002 and 0.050 inches.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |