Tubular scaffolding coupling

Joints and connections – Laterally related members connected by latch means – e.g.,...

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403191, 403343, E04G 700, F16B 704

Patent

active

042485444

ABSTRACT:
A coupling for tubular scaffolding including a boss mounted on a standard by a pin or by welding and a wedge ring rotatably encircling and co-planar with the boss.
Radial insets in the boss combine with the ring to form apertures in which pegs are located, the pegs being attached to the ends of ledgers and transoms. The inner face of the wedge ring has sloping wedge surfaces in the vicinity of the apertures which alter the radial dimension of the apertures. Thus, when a peg is located in an aperture the wedge ring can be rotated to wedge the peg firmly in the aperture.
The problem existing prior to the invention was the difficulty of securing ledgers and transoms. This has to be done by screw couplings or by getting above the coupling in order to tighten it. The coupling of the invention can be operated from below, i.e. by a person standing on erected scaffolding.

REFERENCES:
patent: 1326182 (1919-12-01), Cater
patent: 2583368 (1952-01-01), French
patent: 3885648 (1975-05-01), Beziat

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