Fastening element as well as device to screw in said fastening e

Details Fastening element as well as device to screw in said fastening e Fastening element as well as device to screw in said fastening e

1995-03-23

1996-05-21

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 44, 81125, 411368, B25B 2302, F16B 3500

Patent

active

055178839

ABSTRACT:
The invention pertains to a fastening element consisting of a screw (5) and a metallic washer (6) to attach insulation sheeting, and possibly additional waterproof sheeting onto a solid substructure, whereby the screw is provided with a drill tip (7), a shaft (9) with threads (8), and a screw head (10). The washer is provided with a central aperture (12), whereby this aperture (12) is smaller than the outer diameter of the thread, but at least equally as large as the core diameter of the threaded area of the shaft (9). The washer (6) is at a distance from the screw head (10) preassembled in such a way that it is secured against axial movement in the threaded area of the shaft (9) (FIG. 3).

REFERENCES:
patent: 2782822 (1957-02-01), Clark
patent: 3707894 (1973-01-01), Stillwagon, Jr.
patent: 4781503 (1988-11-01), Bogel
patent: 4809568 (1989-03-01), DeCaro

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