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US 2005/0186047 A1Published application
Screw having function of holding female screw shavings
AssigneeNitto Seiko Co., Ltd.
InventorHiroyuki Sakamoto
Life of this patent
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Abstract
The present invention provides a screw comprising a head and a threaded shank, wherein the shank is covered with a coating at least 60% of the length thereof from the end, the coating includes microcapsules that contain a viscous fluid with an appropriate level of viscosity. Shavings, including powdered shavings due to friction and exfoliations that may be generated during the screwing process, will be held, so that they will not fall, at the surface of the shank by the viscous fluid coming out of the microcapsules.
Claims15
A screw to be screwed into a prepared hole in a workpiece, comprising:
- a head having a drive to be engaged with a driver bit;
- a shank having threads and being integrally formed with the head;
- and
- a coating covering at least 60% of a total length of the shank, starting from an end of the shank opposite to the head, wherein
- the coating includes microcapsules that contain a viscous fluid with a predetermined level of viscosity.
2 more elements
Dependencies are inferred from the claim text.