Knuckle for welding of safety hand railings

Details Knuckle for welding of safety hand railings Knuckle for welding of safety hand railings

1993-08-12

1995-08-15

Bertsch, Richard A.

Fences

Rail

Connection

403 13, 403265, 403270, 403403, E04H 1714

Patent

active

054412412

ABSTRACT:
Instead of creating hand railings by joining together sections of rectangular hollow tubing using mitre cuts and welding of the abutting cut ends, a metal knuckle is welded to the straight ends of such tubing. The knuckle has a body with a rectangular cross-section and in profile a circular sector with an included angle less than 180.degree.. Each end of the knuckle is formed as a pyramidal frustum that is adapted to enter the straight end of the tubing. A notch of generally triangular cross-section is created to hold welding bead between an end of the tubing and a respective frustum end of the knuckle. The notch size increases with the thickness of tubing inserted over the frustum end, and filling the notch with welding bead will automatically increase the joint strength as tubing thickness increases.

REFERENCES:
patent: Re6488 (1875-06-01), Van Duzer
patent: 1881979 (1932-10-01), Taylor
patent: 3411813 (1968-11-01), Kreuz
patent: 3891332 (1975-06-01), Molyneux et al.
patent: 4188140 (1980-02-01), Clemens et al.
patent: 4583755 (1986-04-01), Diekman et al.
patent: 5190207 (1993-03-01), Peck et al.
"Railing Systems & Components", R & B Wagner Inc., 8 page pamphlet, 05720/WAG, BuyLine 3875, Date Unknown.

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