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US 2013/0170922 A1Published application
Method and a plant for washer production and a washer
AssigneeNord-Lock AB
InventorKurt Persson
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AssigneeNord-Lock AB
InventorKurt Persson
Estimating the term…
A method for producing metallic washers (1) for locking in bolted joints, a washer having an annular configuration and on one side (9) a pattern of radially extending cams (10) and on the other side having a pattern of radially extending teeth (3), the washers on at least the side (2) having the pattern of teeth having a surface with a hardness preferably exceeding the hardness of the material to interact with the washer pattern of teeth in a locking operation. The method is especially characterized in the steps of—coating a batch of washers (1) with a corrosion resistant outer surface layer (7), the hardness of which exceeding the hardness of the material (6) to interact with the washer pattern of teeth (3) in a locking operation. The present invention also relates to a washer and a plant.
A method for producing metallic washers for locking in bolted joints, the washers having an annular configuration and on one side a pattern of radially extending cams and on the other side having a pattern of radially extending teeth, comprising:
A metallic washer for locking in bolted joints, the washer comprising a flat annular configuration with a central hole and on one side having a pattern of radially extending cams and on the other side having a pattern of radially extending teeth, wherein the washer is coated with a corrosion resistant outer surface layer, the hardness of which exceeding the hardness of the material to interact with the washer pattern of teeth in a locking operation.
A plant for producing metallic washers for locking in bolted joints, the washers having a flat annular configuration with a central hole and on one side having a pattern of radially extending cams and on the other side having a pattern of radially extending teeth, comprising means for producing steel washers and means for batchwise coating of said steel washers with a corrosion resistant outer surface layer having a hardness exceeding the hardness of the material to interact with the washer pattern of teeth in a locking operation.
Dependencies are inferred from the claim text.