Stiffening device for large area board-shaped construction eleme

Details Stiffening device for large area board-shaped construction eleme Stiffening device for large area board-shaped construction eleme

1986-11-04

1988-10-11

Woo, Jay H.

Static molds

With static gage, level, plumb, or scale markings, etc., on...

5230916, 52630, 52827, 219213, 249 78, 249189, 249192, 264225, 264230, 264273, E04G 905

Patent

active

047765569

ABSTRACT:
Webs for reducing bending in board-shaped construction elements when in use have their main direction of load perpendicular to the board plane. The devices have a sandwich of at least one first material layer, one second material layer, and one third material layer. The third material layer lies between the other two material layers and has a substantially higher coefficient of heat expansion than the other two material layers, so as to set up contracting biasing forces in the third material layer. The third material is made of a sheet metal strip. The two other materials are made of thermosetting plastic, which sets at a temperature considerably above the working temperature of the construction element.

REFERENCES:
patent: Re29945 (1979-03-01), Scott
patent: 1912065 (1933-05-01), Buchanan et al.
patent: 2873529 (1959-02-01), Hogan et al.
patent: 2913036 (1959-11-01), Smith
patent: 2958918 (1960-11-01), MacMillan
patent: 3186679 (1965-06-01), Williams
patent: 3313674 (1967-04-01), Mathews
patent: 3595726 (1971-07-01), Middleton
patent: 3664013 (1972-05-01), MacGuire
patent: 3801072 (1974-04-01), Newberry, Jr.
patent: 3806702 (1974-04-01), Spencer
patent: 3851786 (1974-12-01), Kaempen
patent: 3875280 (1975-04-01), Story
patent: 4021518 (1977-05-01), Sharp
patent: 4044514 (1977-08-01), Rubin et al.
patent: 4150808 (1979-04-01), Sawyer
patent: 4290248 (1981-09-01), Kemerer et al.
patent: 4299171 (1981-11-01), Larson
patent: 4341831 (1982-07-01), Kleiss
patent: 4452025 (1984-06-01), Lew
patent: 4525964 (1985-07-01), Diethelm

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