US4895750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature tensile test specimen and methods of fabrication
Assignee: Raytheon Co
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Filing: 1988-03-28
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Granted: 1990-01-23
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Expires: 2008-03-28
Abstract
Abstract A carbon composite tensile test specimen for high temperature testing and a method of fabricating the same are disclosed. A plurality of holes are drilled in first and second end sections of the specimen and then the end sections are electroplated with nickel. The nickel plating of the end sections prevents breakage of the ends in the jaws of a tensile testing apparatus. For high-temperature testing, a standard-sized specimen may be used with the jaws in the hot zone.
Inventors
- 👤 Wilson N. Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:43
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/5144; C04B41/80; C04B41/81; C04B41/85; C04B41/88; G; G01; G01N; G01N25/00; G01N3/00; G01N3/08; G01N3/18; G01N2203/00; G01N2203/02; G01N2203/022; G01N2203/0222; G01N2203/0226; G01N2203/026; G01N2203/0262; G01N2203/0268; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24802; Y10T428/2481; Y10T428/24917; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A specimen bar of carbon composite material suitable for high-temperature testing in a tensile test apparatus without breaking in the gripping jaws of said apparatus, comprising: a first end portion having a plurality of holes therethrough, said first end portion and the circumferential walls of said holes being plated with a layer of nickel; a second end portion having a plurality of holes therethrough, said second end portion and the circumferential walls of said holes being plated with a layer of nickel; and a tensile test portion between said first and second end portions and contiguous therewith.
Claim 2
Dependent Claim
97 words
A specimen bar of carbon composite material suitable for high-temperature testing in a tensile test apparatus without breaking in the gripping jaws of said apparatus, comprising: a first end portion having a plurality of holes therethrough, said first end portion and the circumferential walls of said holes being plated with a layer of nickel; a second end portion having a plurality of holes therethrough, said second end portion and the circumferential walls of said holes being plated with a layer of nickel; and a tensile test portion between said first and second end portions and contiguous therewith.
Claim 3
Dependent Claim
36 words
The specimen bar of claim 1, wherein said first and second end portions are substantially parallelepipedal and wherein said holes are oriented in a direction orthogonal to a pair of opposed faces of said parallelepiped portions.
Claim 4
Dependent Claim
26 words
The specimen bar of claim 1, wherein said holes are transverse to a longitudinal axis of said bar and transverse to parallel surfaces of said bar.
Claim 5
Dependent Claim
34 words
The specimen bar of claim 1, wherein parts of said tensile test portion adjacent to said first and second end portions are plated with the same predetermined thickness of metal as said end portions.
Claim 6
Dependent Claim
31 words
The specimen bar of claim 1, wherein a diameter of each said hole decreases with a depth in said hole to a minimum value in a central portion of said hole.
Claim 7
Dependent Claim
89 words
A specimen bar of carbon composite material suitable for high-temperature testing in a tensile test apparatus without breaking in the gripping jaws of said apparatus, comprising; a first end portion having a plurality of holes therethrough and plated with a predetermined thickness of metal; a second end portion having a plurality of holes therethrough and plated with a predetermined thickness of metal; and a tensile test portion between said first and second end portions and contiguous therewith, wherein said metal is nickel and said thickness is approximately 0.005 inch.
Claim 8
Dependent Claim
89 words
A specimen bar of carbon composite material suitable for high-temperature testing in a tensile test apparatus without breaking in the gripping jaws of said apparatus, comprising; a first end portion having a plurality of holes therethrough and plated with a predetermined thickness of metal; a second end portion having a plurality of holes therethrough and plated with a predetermined thickness of metal; and a tensile test portion between said first and second end portions and contiguous therewith, wherein said metal is nickel and said thickness is approximately 0.005 inch.
Claim 9
Dependent Claim
23 words
The specimen bar of claim 6 wherein said plurality of holes consists of ten holes arranged in two parallel rows of five each.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |