US3844728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas contacting element leading edge and trailing edge insert
Assignee: RTX Corp
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Filing: 1970-06-22
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Granted: 1974-10-29
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Expires: 1990-06-22
Abstract
Abstract A leading edge or trailing edge insert for use with a gas contacting blade or vane. The insert is a macrocomposite structure of metal and refractory material wherein wires in single crystal form pass through the refractory material and prestress the refractory material in compression.
Inventors
- 👤 M Hornbecker
- 👤 B Kear
- 👤 S Copley
- 👤 A Giamei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:35
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; F01D5/14; F01D5/147; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49337; Y10T428/00; Y10T428/12; Y10T428/12465; Y10T428/12486
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
83 words
A GAS CONTACTING ELEMENT SUCH AS A TURRBINE VANE INCLUDING A METALLIC CENTRAL BODY MEMBER, A NON-METALLIC LEADING EDGE INSERT EXTENDING THE LENGTH OF SAID BODY MEMBER, AND HAVING A PLURALITY OF PARALLEL LONGITUDINAL PASSAGES THEREIN EACH EXTENDING THE ENTIRE LENGTH OF SAID INSERT, A SHROUD ELEMENT AT EACH END OF AND INTEGRAL WITH THE BODY MEMBER, EACH OF SAID SHROUD ELEMENTS EXTENDING OVER THE ENDS OF SAID INSERT, AND METALLIC RODS INTEGRAL WITH SAID SHROUD ELEMENTS AND EXTENDING THROUGH SAID LONGITUDINAL PASSAGES.
Claim 2
Dependent Claim
83 words
A GAS CONTACTING ELEMENT SUCH AS A TURRBINE VANE INCLUDING A METALLIC CENTRAL BODY MEMBER, A NON-METALLIC LEADING EDGE INSERT EXTENDING THE LENGTH OF SAID BODY MEMBER, AND HAVING A PLURALITY OF PARALLEL LONGITUDINAL PASSAGES THEREIN EACH EXTENDING THE ENTIRE LENGTH OF SAID INSERT, A SHROUD ELEMENT AT EACH END OF AND INTEGRAL WITH THE BODY MEMBER, EACH OF SAID SHROUD ELEMENTS EXTENDING OVER THE ENDS OF SAID INSERT, AND METALLIC RODS INTEGRAL WITH SAID SHROUD ELEMENTS AND EXTENDING THROUGH SAID LONGITUDINAL PASSAGES.
Claim 3
Dependent Claim
34 words
A gas contacting element as in claim 1 in which said shroud elements and central body member are a columnar-grained metallic structure with the grains parallel to the longitudinal axis of the body member.
Claim 4
Dependent Claim
21 words
A gas contacting element as in claim 1 in which the metallic rods are a single crystal from end to end.
Claim 5
Dependent Claim
21 words
A gas contacting element as in claim 2 in which the metallic rods are a single crystal from end to end.
Claim 6
Dependent Claim
109 words
A cast gas contacting element including spaced metallic shroud elements, an airfoil-shaped member having leading and trailing edges extending between said shroud elements, said member being essentially metallic and integral with said shroud elements, a non-metallic refractory insert forming a part of the airfoil member at one of said edges, and having a plurality of parallel passages therein, said insert extending between and into contact with the shrouds, and metallic rods in said passages in the insert and extending into and being integral with said shrouds, the insert having a lower rate of thermal contraction than said rods thereby to be stressed in compression when the element is cooled.
Claim 7
Dependent Claim
109 words
A cast gas contacting element including spaced metallic shroud elements, an airfoil-shaped member having leading and trailing edges extending between said shroud elements, said member being essentially metallic and integral with said shroud elements, a non-metallic refractory insert forming a part of the airfoil member at one of said edges, and having a plurality of parallel passages therein, said insert extending between and into contact with the shrouds, and metallic rods in said passages in the insert and extending into and being integral with said shrouds, the insert having a lower rate of thermal contraction than said rods thereby to be stressed in compression when the element is cooled.
Claim 8
Dependent Claim
18 words
A cast gas contacting element as in claim 5 in which the insert is at the leading edge.
Claim 9
Dependent Claim
25 words
A cast gas contacting element as in claim 5 in which there is a non-metallic refractory insert at each of the leading and trailing edges.
Claim 10
Dependent Claim
88 words
A gas contacting element including a metallic central body member, a non-metallic insert engaging with said body member and extending parallel thereto to form an extension of the surface of said body member said insert having at least one longitudinal passage therethrough, shroud elements integral with said central member at opposite ends thereof, said elements extending over and in contact with opposite ends of said insert, and a metallic rod extending through said passage and terminating in said shroud elements, said rods being integral with said shroud elements.
Claim 11
Dependent Claim
88 words
A gas contacting element including a metallic central body member, a non-metallic insert engaging with said body member and extending parallel thereto to form an extension of the surface of said body member said insert having at least one longitudinal passage therethrough, shroud elements integral with said central member at opposite ends thereof, said elements extending over and in contact with opposite ends of said insert, and a metallic rod extending through said passage and terminating in said shroud elements, said rods being integral with said shroud elements.
Claim 12
Dependent Claim
26 words
A gas contacting element as in claim 8 in which the rod is a single crystal and the body member and shroud elements are columnar grained.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |