Wall panels

Details Wall panels Wall panels

1983-06-15

1985-06-11

Perham, Alfred C.

Static structures (e.g., buildings)

With synthetic resinous component

With nonresinous component

52314, 52521, 52536, 52539, 52747, E04D 100, E04D 3363

Patent

active

045220026

ABSTRACT:
Disclosed is a constant contact panel interlock even during thermal expansion and contraction by providing flexible pins to bear on a tongue in a tongue and groove interlock and also by providing ramps for a bendable flange to slide over and bear on. Further, a material made of polypropylene with 20% calcium carbonate filler is used to form the panels, such material being sufficiently flexible at the temperatures common for panels exposed to direct sunlight (as on a roof or wall) to permit the pins or flange to bend without breaking and also being a material of much lower coefficient of expansion than pure polypropylene.

REFERENCES:
patent: 3217453 (1965-11-01), Medow
patent: 3621625 (1971-11-01), Medow
patent: 3783570 (1974-01-01), Storch
patent: 4070843 (1978-01-01), Leggiere et al.
patent: 4102106 (1978-07-01), Golder et al.
patent: 4223490 (1980-09-01), Medow

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