Foldable multi-position ladder joint

Details Foldable multi-position ladder joint Foldable multi-position ladder joint

1984-11-16

1985-09-24

Husar, Cornelius J.

Joints and connections

Articulated members

Lockable at fixed position

182163, 16332, 16334, 16349, F16C 1100, E05D 1110, E06C 750

Patent

active

045430063

ABSTRACT:
Improvements in a foldable multi-position ladder joint in which one side of the locking disk of the second joint member is provided between each notch thereof and the common axial bolt with cams capable of one-way rotation under the driving action of the release element of the operating lever. The other end of the cam shaft returns the cam to its normal position upon pivoting movement of a ratchet hooked with a tension spring. Swinging of the operating lever in disengaging the locking pawl from a notch concomitantly moves the corresponding cam to rotate thereby making way for the release element to pass over and subsequent turning of the cam back to its normal position. Release of the release element is however prevented making possible the closing of the notch in achieving directly the purpose of whether or not the pawl is to be engaged in the notch.
References are given here to applicant's prior U.S. applications with Ser. Nos. 532,096 and 543,445 with filing dates Sept. 14, 1983 and Oct. 19, 1983 respectively.

REFERENCES:
patent: 3655012 (1972-04-01), Hoffman et al.
patent: 3955240 (1976-05-01), Schuh et al.
patent: 4236753 (1980-12-01), Ooshiro et al.

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