US3841764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intrascope
Assignee: UK Secretary of State for Defence
•
Filing: 1972-07-05
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Granted: 1974-10-15
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Expires: 1992-07-05
Abstract
Abstract The disclosure of this invention pertains to an intrascope provided at the objective end with a fastening device whereby the intrascope may be pulled from within the cavity to be inspected. The fastening device is an inflatable bag which can be lodged between two adjacent rotor blades of a turbine so that by turning the turbine the intrascope can be pulled into the turbine casing for inspection of stator blades.
Inventors
- 👤 L Snell
- 👤 W Vivian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:13
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/24; G02B23/26; A; A61; A61B; A61B1/00; A61B1/00163; A61B1/00165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
The method of inspecting by use of an intrascope a machine comprising a rotor having a body supported for rotation and blades connected to said body; a casing surrounding the body and blades, said casing having an opening therein for access to said blades; said intrascope comprising a flexible elongate light guide, a viewing objective provided at one end of the light guide, and means for holding said one end of the light guide between said blades; said method comprising the steps of inserting the intrascope through said opening, holding said one end of the intrascope between said blades, and turning said rotor about the rotational axis thereof thereby to feed the intrascope into the interior of the casing for inspection of said machine.
Claim 2
Independent Claim
124 words
The method of inspecting by use of an intrascope a machine comprising a rotor having a body supported for rotation and blades connected to said body; a casing surrounding the body and blades, said casing having an opening therein for access to said blades; said intrascope comprising a flexible elongate light guide, a viewing objective provided at one end of the light guide, and means for holding said one end of the light guide between said blades; said method comprising the steps of inserting the intrascope through said opening, holding said one end of the intrascope between said blades, and turning said rotor about the rotational axis thereof thereby to feed the intrascope into the interior of the casing for inspection of said machine.
References Cited (Backward Citations)
US3690775A
Cited
US3759151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |