Cutting screw
OwnerTo Ha Loi, David Bateinventors
Life of this patent
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Abstract
Screw (10) for use in the attachment of synthetic sheet materials to a supporting structure wherein screw (10) is manufactured in integral pressed form. Screw (10) includes head (50), shank (30) and tip (12) and is provided which at least one cutting member (20) which extends radially outward from shank (30). Cutting member (20) is separated from head (50) by a distance sufficient to accommodate washer (40) and cuts an aperture in the synthetic sheet material to allow the material to expand and contract without consequent damage from shank (30). Screw (10) further includes thread (11) extending to tip (12) with at least one cutting surface (15) extending through thread (11) adjacent tip (12) for penetrating and self tapping into wood or metal supporting structures.
Claims11
A screw for use in the attachment of synthetic sheet materials which screw is manufactured in integral pressed form and which screw includes a head, a shaft and tip and is provided with at least one cutting member which extends radially outward from the shaft and is separated from the head by a distance sufficient to accommodate a washer device.
A screw for use in the attachment of synthetic sheet materials which screw is manufactured in integral pressed form said screw including a head, a shaft and tip, said screw being able to be used to penetrate both wood and metal by the provision of a screw thread which extends substantially along the shank to the tip of the screw with at least one cutting surface extending through this thread adjacent the screw tip such that an area adjacent the screw tip acts as a drill bit.
Dependencies are inferred from the claim text.