Claims
- 1. A flight of steps, stairs and the like having pipe means arranged to conduct heating medium to maintain the steps free from ice and snow, said pipe means being permanently preshaped to present interconnected substantially arcuate portions and extending substantially in the longitudinal direction of the flight of steps in a tortuous path such as to present substantially arcuate interconnected looped portions located within the confines of the flight of steps and curving alternately towards either side of the flight of steps, said pipe means being arranged beneath the treads and risers of the steps in planes extending substantially parallel with said treads and risers, said pipe means extending substantially perpendicular to the longitudinal direction of said flight of steps at the junctions between treads and risers.
- 2. The steps of claim 1, wherein said pipe means comprises a number of pipes extending in a tortuous path substantially in the longitudinally direction of the flight of steps, said pipes extending generally parallel with each other along the flight of steps.
- 3. The steps of claim 1, wherein said pipe means comprises a number of pipe portions extending in a tortuous path substantially in the longitudinal direction of the flight of steps between the top and the bottom thereof.
- 4. The steps of claim 3, wherein the ends of said pipe means are connected at one end and the same end of the flight of steps to a heating medium inlet and a heating medium outlet.
- 5. The steps of claim 3, wherein said pipe portions extend substantially parallel with each other along the flight of steps.
- 6. The steps of claim 1, wherein said pipe means extends between two adjacent treads and two adjacent risers respectively in the form of one single, substantially U-shaped looped portion.
Priority Claims (1)
Number |
Date |
Country |
Kind |
10908/71 |
Aug 1971 |
SW |
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Parent Case Info
The present application is a continuation-in-part of the parent applications Ser. Nos. 284,456, filed Aug. 28, 1972 (now U.S. Pat. No. 3,881,235) and Ser. No. 462,538, filed Apr. 19, 1974, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (5)
Number |
Date |
Country |
236,086 |
Oct 1964 |
OE |
535,480 |
Feb 1955 |
BE |
481,691 |
Mar 1952 |
CA |
702,077 |
Jan 1965 |
CA |
172,886 |
Sep 1960 |
SW |
Related Publications (1)
|
Number |
Date |
Country |
|
462538 |
Apr 1974 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
284456 |
Aug 1972 |
|