US3802255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixture for tensile and stress rupture testing of turbine blades
Assignee: United States Department of the Air Force
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Filing: 1972-03-08
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Granted: 1974-04-09
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Expires: 1992-03-08
Abstract
Abstract A fixture to hold turbine blades, too small for conventional test-bar testing methods, which grasps the root and tip end of the blade. The fixture is formed of a suitable metal alloy and is molded to fit the blade tip and root, and is adapted to be secured to the testing machine.
Inventors
- 👤 J Struthers
- 👤 J Miller
- 👤 R Boucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:00
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/02; G01N3/04; G01N2203/00; G01N2203/0014; G01N2203/0016; G01N2203/0017
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A fixture for tensile and stress rupture testing of turbine blades comprising turbine blade: a first block of suitable material having formed therein a chamber for receiving the turbine blade, said chamber so formed as to substantially encase one portion of said blade; a second block of suitable material having formed therein a chamber for receiving the turbine blade, said chamber so formed as to substantially encase the remaining portion of said blade, and each of said blocks having mating aperatures therethrough; at least one pin adapted to fit in said aperatures and secure the blocks in a mated condition.
Claim 2
Dependent Claim
100 words
A fixture for tensile and stress rupture testing of turbine blades comprising turbine blade: a first block of suitable material having formed therein a chamber for receiving the turbine blade, said chamber so formed as to substantially encase one portion of said blade; a second block of suitable material having formed therein a chamber for receiving the turbine blade, said chamber so formed as to substantially encase the remaining portion of said blade, and each of said blocks having mating aperatures therethrough; at least one pin adapted to fit in said aperatures and secure the blocks in a mated condition.
Claim 3
Dependent Claim
13 words
A fixture according to claim 1 wherein, said suitable material includes IN100 steel.
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |