Title:
REVERSE BARB SYSTEM FOR SCREWS AND NAILS
Document Type and Number:
WIPO Patent Application WO2005003572
Kind Code:
A3
Abstract:
The reverse barb system for screws and nails includes fasteners that are barbed to prevent backing out once driven into a workpiece or construction material, such as wood. A screw with barbed threads (10) has several barbed thread sections (20). Each barbed thread section is a section of thread having a leading edge (24) and a trailing edge (26), the trailing edge defining a barb to increase the screw's resistance to backing out once driven into place. A nail with a barbed point is a nail having one or more barbs formed in the nail's point. Each barb is defined by a leading edge and a trailing edge. The barb's trailing edge forms an acute angle with the longitudinal axis of the nail. The barbs extend from the nail shank to prevent the nail from backing out.
Inventors:
FRENCH DOUGLAS R (US)
Application Number:
PCT/US2004/008154
Publication Date:
November 10, 2005
Filing Date:
March 17, 2004
Export Citation:
Assignee:
FRENCH DOUGLAS R (US)
International Classes:
F16B15/06; F16B25/00; F16B33/02; (IPC1-7): F16B15/00
Foreign References:
| US20020131843A1 | 2002-09-19 | |||
| DE20106743U1 | 2001-08-30 | |||
| US5557898A | 1996-09-24 | |||
| US6302885B1 | 2001-10-16 |
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