Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Torque responsive nut or bolt driving connection – Resilient connection
Patent
1995-06-06
1997-03-04
Meyers, Steven N.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Torque responsive nut or bolt driving connection
Resilient connection
411120, 411191, 411762, 411778, F16B 782
Patent
active
056067534
ABSTRACT:
A fixing device with a locking mechanism includes a bolt having a hexagonal head, a seat attached to the bottom face of the bolt head, and a washer to be fit onto the threaded shaft of the bolt. The seat has an engagement portion which is raised from an outer edge of the seat along a side face of the bolt head to restrain the free rotation of the bolt with respect to the seat, and an elastic engagement pawl outwardly extending from a lateral end of the engagement portion. The washer has a plurality of engagement grooves which are engagable with the engagement pawl, and an antislipping means provided on the side which contacts the surface of a member to be fastened. When the bolt is fastened, the engagement pawl engages with one of the engagement grooves of the washer. This prevents the hexagon-head bolt from turning in a loosening direction. A locking function can be added to the fixing device without additionally machining the bolt or a member to be fastened. The locking mechanism can be unlocked using a box wrench.
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patent: 5190423 (1993-03-01), Ewing
Conley Fredrick
Hashimoto Shinwa Setsubi, Limited
Meyers Steven N.
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