Construction element and coupling device therefor

Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Outside corner or peripherally bordered

Reexamination Certificate

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Details

C052S655200, C052S749100, C052S749100, C403S170000, C403S173000, C403S298000, C403S354000, C403S359100, C403S364000

Reexamination Certificate

active

06857247

ABSTRACT:
A construction element has at least one coupling device and the coupling device has at least two prongs. Each prong is comprised of two radially extending mating surfaces which frictionally engage the radially extending surfaces of a mating coupling device. The construction device may have a straight shaft or an angled shaft to accommodate the needs of the user and, furthermore, the prongs of a coupling device may be inserted within mateable apertures in the shaft of another construction element. Using a plurality of such construction elements, a lattice frame may be constructed.

REFERENCES:
patent: 9552 (1853-01-01), Bell
patent: 2097172 (1937-03-01), Yurkovitch
patent: 2823404 (1958-02-01), Hyman
patent: 2848769 (1958-05-01), Oakley
patent: 3628300 (1971-12-01), Tsurumi
patent: 4809401 (1989-03-01), Honig
patent: 5464305 (1995-11-01), Liem
patent: 5704186 (1998-01-01), Alcalay et al.
patent: 5788400 (1998-08-01), Wey
patent: 6065899 (2000-05-01), Adams et al.

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