Abstract: A catch hook for the releasable locking of the backrest connected with the seat part of a vehicle seat such that the backrest can swivel forward. The catch hook is supported in a swivelably articulated manner at the articulated part of an articulated fitting which possibly comprises an adjusting and locking arrangement for adjusting the inclination of the backrest, this articulated part being connected with the seat part so as to be swivelable. The hook jaw of the catch hook engages around a stop for the articulated part in the locking position, this stop being fixed to the seat part. The locking position is secured in a releasable manner by a retaining lever which acts on the catch hook and is supported at the articulated part so as to be swivelable. In order to minimize the structural component parts required for the catch hook arrangement, the catch hook has a control cam forming the upper side of the hook jaw and projecting beyond the hook finger.

Abstract: A hinge joint wherein one of the leaves is secured to a fixed part and the other leaf is secured to the pivotable back rest of a seat in motor vehicle and is pivotable with reference to the fixed leaf about the axis of a pintle which can be rotated by a hand wheel or a motor. The other leaf carries a braking member with a cylindrical or frustoconical internal surface which is engaged by the peripheral surface of a prestressed elastic split ring defining a gap for the projection of a blocking element which is affixed to the pintle and urges the split ring into stronger frictional engagement with the braking member when the back rest is acted upon to pivot the other leaf. A coupling device is secured to the hand wheel or to the motor to disengage the split ring from the braking member when the pintle is rotated by the hand wheel or by the motor. The end portions of the split ring flank the projection of the blocking element and are flanked by two protuberances of the coupling device.

Abstract: An elongated bending core is inserted coaxially in an elongated outer tube. The core has at least one recess which extends along the elongation of the core. An elongated inner tube is inserted into the recess so that the inner and outer tubes together constitute a jacketed tube. The jacketed tube is bent about an axis which is normal to the longitudinal axis thereof to thereby bend the inner and outer tubes simultaneously.