Patent ID: 9683595
Date: 2017-06-20
CPC Classifications: F16B

Claim:
1. A metallic locking washer configured to be mounted in a screw/nut system to engage between a nut and a bearing element, said metallic locking washer comprising a contact face suitable for coming into contact with either or both of the nut or the bearing element, said contact face comprising a surface which provides friction against either or both of the nut or the bearing element when the nut loosens, wherein said contact face is coated, by thermal projection of an additive material, with a coating forming a rough surface, which increases the friction forces between the contact face of the metallic washer and either or both of the nut and the bearing element, wherein the metallic locking washer is a locking washer with two washer crowns, wherein the coating of additive material is uniformly distributed over the contact face of the washer, such that the washer has homogenously-distributed imperfections formed in the shape of ridges or grooves, thereby providing a uniform roughness on the contact face.