Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Including means to hold or retard hinged members against...
Patent
1986-04-14
1991-10-22
Seidel, Richard K.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Hinge
Including means to hold or retard hinged members against...
16332, 403 93, E05D 1110, F16C 1100
Patent
active
050582399
ABSTRACT:
A modified structure of a fixing knuckle commonly used in an aluminum folding ladder is disclosed. The present disclosure is characterized in its locking assembly including a rectangular locking block and a frame consisting of two parallel L-shaped cam plates connecting together at their top ends, and the locking block having a connecting head integrally joined thereto pivotably mounted on the frame. The fixing knuckle is comprised of an outer casing and an inner disk member, rotatably joined together with the inner disk member housed in the outer casing through a splitting opening thereon, and the frame is astride mounted on the inner disk member with a pulling spring attached to the end thereof for allowing the cam plates to reciprocatingly move about a pivot joining the frame and the locking block. The present disclosure is further characterized in a number of projecting guide pins riveted on both sides of the inner disk member which work in cooperation with the L-shaped cam plates of the frame to effect the change of the fixing angle of the fixing knuckle.
REFERENCES:
patent: 3643292 (1972-02-01), Mayer
patent: 3879146 (1975-04-01), Mayer
patent: 4543006 (1985-09-01), Wang
Alfa Metal Corp.
Cuda Carmine
Seidel Richard K.
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