Rotatable bending joint for collapsible playpen

Details Rotatable bending joint for collapsible playpen Rotatable bending joint for collapsible playpen

1995-05-01

1996-08-06

Rachuba, M.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Hinge

Including means to hold or retard hinged members against...

16329, 5 991, 403 97, A47D 700, E05D 1110

Patent

active

055421512

ABSTRACT:
An improved rotatable joint of the kind disclosed in U.S. Pat. No. 5,381,570 for foldable tubular playpen frames having a step in the tooth of a recessed sprocket portion in which a connecting gear rests. In order to unlock the joint one must move the gear axially inwardly with a pushbutton as well as relieve the stresses on the joint by lifting up the tubular bars connected to the joint so that the gear may slip off the step. In this way an additional factor of safety is built-in in order to unlock the joint, and accidental release is reduced.

REFERENCES:
patent: 4929113 (1990-05-01), Sheu
patent: 5039118 (1991-08-01), Huang
patent: 5056805 (1991-10-01), Wang
patent: 5062179 (1991-11-01), Huang
patent: 5123768 (1992-06-01), Franklin
patent: 5377368 (1995-01-01), Cheng
patent: 5381570 (1995-01-01), Cheng

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