Hooking cap for borescope

Details Hooking cap for borescope Hooking cap for borescope

1990-11-05

1991-11-19

McGraw, Vincent P.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

385117, G02B 2316, G02B 2324

Patent

active

050661221

ABSTRACT:
A flexible borescope for penetrating a passage into an inaccessible area of a jet engine or other device to be visually inspected has an imaging system disposed at its distal tip, and conducts the image to a viewing device coupled to a proximal end of the insertion tube. A hooking cap can be controllably latched onto and removed from a projection in the inaccessible area, for example, the trailing edge of one of the blades of a turbine rotor. The hooking cap has a circumferential sleeve portion that overfits the borescope tip and wing portions that project tangentially outward from the sleeve so their wing tips substantially meet. The wing tips hook over the projection. The hooking cap is formed unitarily of aluminum sheet, with tabs that engage respective shoulders formed in the borescope tip for positioning the cap rotationally and axially.

REFERENCES:
patent: 4298312 (1981-11-01), MacKenzie et al.

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