Centre Technique Des Industries Mecaniques

Nord-lock International Ab

Nord-locke International Ab

Stellantis Auto Sas

Christophe Delcher

Pierre Chalandon

Stéphane Meunier

Etienne Yvain

Pierre Gilles Belon

Gael Le Guyader

Alexandre Perrier

Alexandre Pereira

A screw assembly includes a longitudinal component () having two opposite ends and a threaded part () so that it can be connected by screwing to one of two elements (). An elastically deformable member () is adapted to be borne, in the axially compressed state, between one or other of the two opposite ends of the longitudinal component () and the other of the two elements. The assembly has a retaining device () so as to be able to keep the elastically deformable member () in compression and so as to be able to release the elastically deformable member in the compressed state between the other of the two elements () and the one or the other of the two opposite ends.

Deformable screw assembly

A metallic locking washer is configured to be mounted in a screw/nut system to engage between a nut and a bearing element. The metallic locking washer has a contact face suitable for coming into contact with one or the other of the nut and the bearing element. The contact face has a surface that is suitable for being brought along in friction against one or the other of the nut and the bearing element when the nut loosens. The contact face is coated, by thermal projection of an additive material, with a rough coating forming a rough surface, which increases the friction forces between the contact face of the metallic washer and one or the other of the nut and the bearing element.

Rough metallic locking washer

The invention relates to a locking washer which is to be inserted between a bearing element () and a screwable element () and which includes two washer crowns (), each of which has an engagement face (). Said washer crowns () which engage with one another and are maintained compressed under axial pressure between said screwable element () and said bearing element () are capable, when said screwable element is unscrewed, of rotatably engaging with said screwable element (), and said bearing element (), respectively, so as to rotate said washer crowns () relative to one another, in order to rotatably lock said screwable element (). According to the invention, said locking washer presents a shape of a truncated cone, and said locking washer () is elastically deformable in order to be able to be flattened, forming a spring, such that said axial pressure is maintained substantially constant.

Double-acting lockwasher

Growing community of inventors

Fraisses, France

Christophe Delcher