Nacam France Sa

Lemforder Nacam Sa

Lemforder Nacam

Michel Chartrain

Arnaud Janvier

Laurent Gallou

Christophe Sachot

An anti-theft locking device for vehicles includes an annular locking sleeve mounted concentrically about and normally in frictional engagement with the vehicle steering shaft. The locking sleeve includes a body portion having a serpentine cross-sectional configuration, thereby defining on the inner periphery of the sleeve a plurality of alternate smooth convex projections and concave valleys. The convex projections are in frictional engagement with the circumferential surface of the steering shaft by a predetermined frictional force that is greater than the rotational torque force produced during normal steering operation of the vehicle. A plurality of circumferentially spaced teeth extend radially outwardly from the locking sleeve, thereby to define between the teeth a plurality of locking slots one of which is arranged to receive the free extremity of the locking arm of a locking device.

Anti-theft locking means for a vehicle steering shaft

In a device for holding a first member in position relative to a second member, the first member and the second member are connected by a clamping system having a clamping axle passing through the members. A relatively soft plastics material adhesion shoe is fixed to the second member. The clamping axle passes through the adhesion shoe. A metal rack having teeth is disposed on a base which is mounted on the clamping axle. When the clamping system is immobilized in a locked position, the teeth of the rack penetrate the relatively soft plastics material of the adhesion shoe in order to guarantee that the first member is held in position relative to the second member.

Apparatus for clamping together two members

In a method of producing splines on a shaft, cold deformation without removal of chips is effected on the outside face of a small-thickness tube in a single operation. The cold deformation includes hammering the small-thickness tube by a conjugate and simultaneous action of beating and kneading. The depth of the splines can be as much as half the thickness of the tube.

Growing community of inventors

Lunay, France

Michel Chartrain