Hand railing and method of manufacture

Details Hand railing and method of manufacture Hand railing and method of manufacture

1991-11-22

1993-03-02

Kundrat, Andrew V.

Fences

Rail

248251, 16111R, E04H 1714

Patent

active

051902672

ABSTRACT:
A rigid hand railing is disclosed having a plurality of compound indentations formed in the underside thereof to facilitate gripping thereof by a human hand. A method of manufacture of such a hand railing is also disclosed wherein a tool having a plurality of individually movable forming punches to be driven into pre-formed tooling stock is used to form the indentations in one side of the tubing stock. Each forming punch is provided with a tip portion having a compound shape formed from two perpendicular oriented and oppositely disposed arcuate shapes. The forming punches are to be alternatively or sequentially driven into the tubing stock to form the indentations.

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patent: 3494596 (1970-02-01), Bellinson
patent: 3633862 (1972-01-01), Breen
patent: 4020639 (1977-05-01), Nagare
patent: 4895332 (1990-01-01), Hansen et al.

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