The invention relates to a fuel injector for a turbine engine, comprising a body having a fuel inlet opening into an upstream chamber and a fuel outlet connected to a downstream chamber, a metering valve being mounted between the upstream chamber and the downstream chamber, said valve being subjected to the action of an elastic return spring tending to return the valve to a closed position, the spring (11) and the valve being designed to allow the opening of the valve and to allow the passage of fuel from the upstream chamber to the downstream chamber, above a given fuel pressure in the upstream chamber, the return spring (11) extending along the axis (X) of movement of the valve, characterized in that the spring (11) has a first axial end and a second axial end, both annular, connected to one another by at least two helical parts (11c, 11d) elastically deformable in the axial direction (X).

A torsion spring assembly according to the invention includes a torsion spring having a cylindrical spring body of wound spring wire and with a plurality of torsion spring windings, and having first and second torsion spring ends for taking up forces in a direction of rotation, and a damping spring abutting the torsion spring on the inner side and having a cylindrical spring body of wound spring wire and with a plurality of damping spring windings, and having first and second damping spring wire ends, wherein the damping spring windings have their outer sides extending partially into the space formed between two respectively adjacent torsion spring windings and abutting in particular rounded, round or beveled inner abutment areas of respectively adjacent torsion spring windings with substantially radially outwardly directed bias.

The invention relates to a wrap spring for blocking an unwanted rotational movement of a rotary element. The invention further relates to an adjusting device for adjusting the wear of brake pads of a disk brake. An adjusting device comprises a guide sleeve in which a wrap spring is arranged, a grooved ring which encompasses the guide sleeve, wherein the grooved ring is coupled to a closure cap via a torsion spring, and an opening ring encompassing the grooved ring. The invention further relates to a disk brake for a vehicle, in particular for a utility vehicle, wherein the disk brake comprises an adjusting device with a wrap spring.

A wire material for a canted coil spring includes a core wire composed of a steel having a pearlite structure, a copper plating layer covering the outer peripheral surface of the core wire, the copper plating layer being composed of copper or a copper alloy, and a hard layer disposed adjacent to the outer periphery of the copper plating layer, the hard layer having a higher hardness than the copper plating layer. The steel constituting the core wire contains 0.5% or more by mass and 1.0% or less by mass carbon, 0.1% or more by mass and 2.5% or less by mass silicon, and 0.3% or more by mass and 0.9% or less by mass manganese, the balance being iron and unavoidable impurities.

A decoupler is disclosed for transmitting a drive torque from a rotary drive to a rotary output. The decoupler may include a first spring collar arranged on a drive-part side of a first end of a coil torsion spring and a second spring collar arranged on an output-part side of a second end of the coil torsion spring. The spring collars include axially ascending ramps, and the ends of the coil torsion spring resting thereon widen the coil torsion spring radially with transmission of a drive torque. The ends of the coil torsion spring and the spring collars include reciprocal rotary stops that prevent a relative rotation of the second spring collar with respect to the second coil torsion spring end and of the first coil torsion spring end with respect to the first spring collar.

A bearing support assembly includes a bearing assembly, a housing, and a centering spring. The centering spring is coupled to the bearing assembly and the housing. The centering spring includes a plurality of spiral beams. A first of the plurality of spiral beams is defined by a first end and a second end. The first end and the second end correspond to a first circumferential location that is defined relative to a longitudinal centerline of the bearing support assembly.

According to an embodiment, a coil spring is formed of a wire which is helically wound, and includes an end turn portion and an effective portion, and a surface of the wire in the end turn portion includes an area which is softer than a surface of the wire in the effective portion.

According to an embodiment, a coil spring is formed of a wire wound in a helical shape, and includes an end turn portion and an effective portion. A surface of the wire in the end turn portion has a first area and a second area softer than the first area. Further, in a circumferential direction around an axis of the wire, the second area is formed over a range wider than that of the first area.

A supernumerary robotic limb (SRL) system can include a plurality of rigid links, a joint that connects one rigid link to another rigid link in the plurality of rigid arms, and two variable stiffness actuators (VSAs) configured to drive the plurality of rigid links in order to complete at least one task. The VSAs can exhibit infinite rotation and infinite stiffness. The VSAs can include an output link. Additionally, the VSAs can include a set of elastic elements mounted on the output link. The VSAs can include an input link configured to provide kinetic energy for the output link. The VSAs can include a dynamic chassis configured to connect with the input link. Additionally, the VSAs can include a stiffness adjustor included in the dynamic chassis and configured to adjust an elastic transmission between at least one elastic element of the set of elastic elements and the output link.

A torsion spring assembly according to the invention includes a torsion spring having a cylindrical spring body of wound spring wire and with a plurality of torsion spring windings, and having first and second torsion spring ends for taking up forces in a direction of rotation, and a damping spring abutting the torsion spring on the inner side and having a cylindrical spring body of wound spring wire and with a plurality of damping spring windings, and having first and second damping spring wire ends, wherein the damping spring windings have their outer sides extending partially into the space formed between two respectively adjacent torsion spring windings and abutting in particular rounded, round or beveled inner abutment areas of respectively adjacent torsion spring windings with substantially radially outwardly directed bias.