Fastening devices
OwnerJerome H. Lemelsoninventor
Life of this patent
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Abstract
Fastening devices such as washers, seals and drive pins subject to corrosive deterioration of all or select portions thereof wherein all or such select portions are protected from such corrosion and failure by a thin coating or coatings of hard surface material or materials. In a preferred form, the fastening device is coated with a synthetic diamond material formed as a thin layer in situ thereon. In addition to preventing moisture and other corrosive material from penetrating to the base metal, such synthetic diamond material serves to preserve the surface integrity of the fastening device preventing the formation or spread of surface flaws produced during use or during the fabrication of the fastening device.
Claims18
A washer adapted to be compressively engaged between work surfaces comprising:
- a) a washer base of circular configuration fabricated of a solid material having a central opening permitting the washer to be assembled with and surrounded by a shank or the like and to be compressed between two adjacent parallel surfaces of work in an assembly with such work,
- b) the entire outer surface of said washer base being coated with a synthetic diamond-like material which serves to protect the washer from corrosion.
A washer in accordance with claim I having the outer surface of said coating of said diamond-like material coated with a solid lubricant.
A washer in accordance with claim I having a hard surfacing material coated against the outer surface of said synthetic diamond-like material formed of a metal, alloy, carbide, nitride or oxide of a metal selected from the group of metals including chromium, vanadium, titanium, tungsten, columbium and aluminum.
A fastening device for use as a component in a manufactured assembly comprising:
- a) a core member made of a rigid solid structural material having opposed first and second facial portions at least one of which is adapted to be compressively engaged against an assembly component when assembled with said component,
- b) a passageway formed on said core member and extending between said first and second facial portions of said base,
- c) the inside wall of said passageway being coated with a synthetic diamond-like material.
Dependencies are inferred from the claim text.