A rolled round steel material for a steering rack bar, having a chemical composition consisting of C: 0.38 to 0.55%, Si: not more than 1.0%, Mn: 0.20 to 2.0%, S: 0.005 to 0.10%, Cr: 0.01 to 2.0%, Al: 0.003 to 0.10%, and N: 0.003 to 0.03%, with the balance being Fe and impurities, and P being not more than 0.030% in the impurities, and a microstructure consisting of ferrite (F), lamellar pearlite (LP), and cementite (C). The average grain diameter of (F), an area fraction of (LP), and the number of particles of spheroidal cementite (SC) among C are controlled in a region from the surface to a position at ½ radius and in a central part of the material. An average aspect ratio of F is controlled in a region from a surface to a position at ½ radius.

A mechanical converter for converting rotary motion to reciprocating motion, and vice versa, featuring a gear rack, one or more half-gears alternately engaged with the gear rack, the gear rack configured to produce reciprocating motion in response to the alternate engagement with the one or more half-gears.

Toothed rack brush for cleaning a toothed rack of a toothed rack gear, with a toothed rack, a brush head with a plurality of bristles, which is rotationally arranged about a rotational axis, aligned in parallel to the toothed rack in order to carry out a rotational movement and is arranged in a linearly moveable manner to carry out a relative longitudinal movement relative to the toothed rack, a synchronization device for synchronizing the rotational movement with the longitudinal movement.

A drive cable for actuating a vehicle element which is mobile relative to a vehicle structure, the drive cable having a plastic cable body which has a toothing extending in the axial direction to become engaged with a driving gear wheel and is penetrated by a continuous reinforcement which extends in the axial direction. The toothing is formed by pocket-like recesses which are regularly spaced in the axial direction and are limited by flanks of resulting tooth tips in the longitudinal direction of the cable and by pocket flanks on both sides in the transverse direction of the cable and each of which is limited at the bottom by a tooth root which is penetrated by the continuous reinforcement.

A drive cable for actuating a vehicle element which is mobile relative to a vehicle structure, the drive cable having a plastic cable body which has a toothing extending in the axial direction to become engaged with a driving gear wheel and is penetrated by a continuous reinforcement which extends in the axial direction. The toothing is formed by pocket-like recesses which are regularly spaced in the axial direction and are limited by flanks of resulting tooth tips in the longitudinal direction of the cable and by pocket flanks on both sides in the transverse direction of the cable and each of which is limited at the bottom by a tooth root which is penetrated by the continuous reinforcement.

A rack is made from a plurality of laminated layers. Each layer defines an alignment feature that allows all of the layers to be affixed to a base plate of an aircraft seat assembly and align the teeth of the rack to within five ten-thousandths of an inch. The rack includes a straight portion and a curved portion such that a pinion gear on the aircraft seat assembly can move the aircraft seat assembly along tracks with straight and curved portions.

A rack is made from a plurality of laminated layers. Each layer defines an alignment feature that allows all of the layers to be affixed to a base plate of an aircraft seat assembly and align the teeth of the rack to within five ten-thousandths of an inch. The rack includes a straight portion and a curved portion such that a pinion gear on the aircraft seat assembly can move the aircraft seat assembly along tracks with straight and curved portions.

A rack bar unit of a vehicle steering device may include a rack bar body and a rack gear made of different materials, in which the rack gear may be coupled to the rack bar body.

A rack bar unit of a vehicle steering device may include a rack bar body and a rack gear made of different materials, in which the rack gear may be coupled to the rack bar body.

Rack bar 10 for transmitting a steering operation to steered wheels while converting a rotational movement of a pinion shaft rotatably connected to a steering wheel into an axial movement, the rack bar being formed by conducting a die forging process on a material having an approximately circular cross section. A pair of face width-enlarged portions 15 is provided at both ends that rack teeth 14 have in face width direction. With this, it becomes possible to ensure face width dimension W of rack teeth 14 larger than outer shape S of a circular cross section of rack main body 13 (material), which results in an improvement of a contact gear ratio between the pinion teeth and the rack teeth.