Joint for magic square central bearing structure

Details Joint for magic square central bearing structure Joint for magic square central bearing structure

1992-08-28

1993-12-21

Reese, Randolph A.

Joints and connections

Split end with laterally movable opposed portions

With separate force-applying means

403248, 273153S, 411339, F16B 204

Patent

active

052716880

ABSTRACT:
A magic square comprised of a central bearing having six joint axles respectively associated with six central surface segments rotatably secured thereon, twenty edge surface segments being fit in the space formed by the central surface segments to form a three-dimensional square block. Each of the central surface segments comprises a through hole having an inside diameter larger than the joint axle to be rotatably fit on the joint axle. Each of the joint axles has an expanded end with a cone-shaped camming surface, the expanded end defining a step with the joint axle. A pair of diametrical slits in the form of a cross are formed on the expanded end to provide a resilient inward deformation when the expanded end is contacted by the through hole of the central surface segment to allow the expanded end to penetrate and pass the through hole and then expand back to its original shape to have the step abut against the peripheral edge of the through hole and thus retaining the central surface segment on the joint axle.

REFERENCES:
patent: 4012155 (1977-03-01), Morris
patent: 4151974 (1979-05-01), Kuhn
patent: 4427197 (1984-01-01), Doose
patent: 4540177 (1985-09-01), Horvath
patent: 4657255 (1987-04-01), Seres
patent: 4817952 (1989-04-01), Biro et al.
patent: 4881843 (1989-11-01), Randleman
patent: 5143500 (1992-09-01), Schuring et al.

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