Lock washer assembly having wedge lock action

Details Lock washer assembly having wedge lock action Lock washer assembly having wedge lock action

1991-01-30

1992-01-14

Wilson, Neill R.

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

Threaded fastener locked to a discreet structure

Member or portion thereof located between substructure and...

411136, F16B 3924, F16B 39282

Patent

active

050805452

ABSTRACT:
A lock washer assembly in which two washers are used in back-to-back relation. One face of each washer is serrated to form a series of circumferentially extending cam surfaces; the other face of each washer is flat and devoid of any projections or surface discontinuities. When the lock washers are arranged between a workpiece and a fastener element (nut or head of a bolt) the cam surfaces act as wedge lock devices; and any tendency of the fastener element to unloosen increases the contact pressure of the flat washer faces on the workpiece and fastener element.

REFERENCES:
patent: 3263727 (1966-08-01), Herpolsheimer
patent: 3329190 (1967-07-01), Oldenkott
patent: 3895663 (1075-07-01), Bashline et al.
patent: 4538313 (1985-09-01), Frieberg
patent: 4704058 (1987-11-01), Crunwell
patent: 4708555 (1987-11-01), Terry

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