Steps, stairs and the like

Details Steps, stairs and the like Steps, stairs and the like

1975-09-24

1976-11-23

Schwadron, Martin P.

Heat exchange

Geographical

165 47, 1262712A, 52173R, 52189, F24H 300, E04F 1114

Patent

active

039931226

ABSTRACT:
A flight of steps, stairs and the like heated by means of a heating medium passing through a pipe means located within the steps, stairs etc. The pipe means is located totally within the confines of the step structure and extends in a tortuous path generally longitudinally of the flight of steps. The pipe is permanently pre-shaped so as to present interconnected, generally arcuate looped portions and is made to conform to the step configuration substantially solely by being twisted at selected regions along its length.

REFERENCES:
patent: 867818 (1907-10-01), Graham
patent: 1771268 (1930-07-01), Musgrave
patent: 1771269 (1930-07-01), Musgrave et al.
patent: 2997770 (1961-08-01), Beltz
patent: 3157358 (1964-11-01), Birkemeier

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