Fasteners that bleed fluid upon failure

Details Fasteners that bleed fluid upon failure Fasteners that bleed fluid upon failure

1990-11-26

1992-02-18

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

With means to indicate application of predetermined...

Color indicator

411 14, 411 43, 411395, 411504, 116212, 116DIG34, 73761, F16B 3102, G01L 500

Patent

active

050888676

ABSTRACT:
A failure indicating device wherein a fluid is encased within a bore in a fastener. In another embodiment of the invention, the fluid is encased within a thin walled capsule which in turn is encapsulated within a bore in the fastener. Upon failure of the fastener, the encased fluid will leak out into the external surface and its detection will indicate that the fastener has failed. The stress which causes the fastener to fail will also assist the fluid to leak out onto its external surface. To facilitate the leakage of the fluid, one or more shallow and narrow groove(s) may be machined onto the external surface of the fastener so that the leaked fluid will travel along this groove(s) to the preferred external end of the fastener. This is desirable in cases where only one side of the joint is accessible.

REFERENCES:
patent: 1977358 (1934-10-01), Stevens
patent: 3602186 (1971-08-01), Popenoe
patent: 3799108 (1974-03-01), Mosow
patent: 3987699 (1976-10-01), Popenoe
patent: 4481902 (1984-11-01), Meyer et al.
patent: 4777901 (1988-10-01), Marsden et al.
patent: 4826027 (1989-05-01), Nilson

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