Load indicating fasteners

Details Load indicating fasteners Load indicating fasteners

1992-03-02

1993-06-29

Lindsey, Rodney M.

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

With means to indicate application of predetermined...

Including gauge means

411 9, F16B 3112

Patent

active

052228495

ABSTRACT:
A load-indicating fastener, such as a bolt (10), has a bore (18) which extends from an end face (16) of the bolt and which can receive a gauge pin (30). The gauge pin (30) is free to rotate so that it can be withdrawn completely from the bolt. In use of the bolt, the gauge pin (30) is reinserted into the bore (18) and screwed down until the end of the pin engages the inner end of the bore. As the bolt is tightened, causing elongation of the shank (12) of the bolt (10) and therefore of the bore (18), the user can check the loading on the bolt by periodically rotating the gauge pin (30), to maintain contact between the end of the pin and the inner end of the bore, until the pointer (40) reaches the mark (28) on the end face (16) of the bolt, indicating that the predetermined loading has been reached.

REFERENCES:
patent: 2413797 (1947-01-01), Stone
patent: 3248923 (1966-05-01), Blakeley
patent: 3283567 (1966-11-01), Fietz
patent: 3881392 (1975-05-01), Curtis
patent: 4525114 (1985-06-01), Hirst
patent: 4904132 (1990-02-01), Popenoe
patent: 4981404 (1991-01-01), Chamberlain et al.

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