Abstract: The present invention relates to a caster (1), in particular a steering roller having a wheel (5, 6) and a locking device, the locking device having a setting element (7) and engagement element (9) which cooperates with the setting element so as to block the travel of the wheel (5, 6) in which a linear setting movement of the setting part (7) can be transmitted via a wedge transmission (10) to the engagement element (9). In order to achieve a development which is as simple as possible from a design standpoint and also has advantageous kinematics, the invention proposes that the engagement element 9 be arranged guided for linear movement in order to effect a linear engagement movement with respect to the wheel (5, 6).

Abstract: A wheel assembly has a rim body made from injection-moldable plastic. A tire is applied to the plastic rim which tire consists of thermoplastic rubber. For achieving a high resistance to heat and fire without impairing the cohesion between such materials, the body or rim consists of a halogen-free polypropylene copolymer and the tire consists of a polypropylene vulcanized cross-linked with an EPDM rubber.

Abstract: A swivel castor having a locking device to arrest rotation of its wheel aor swivelling of its fork, the device comprising a mounting sleeve and, extending therethrough and through the fork head, an axially movable locking pin having a vertically adjustable top member acted on by a cam received in the mounting sleeve. The top member of the locking pin is guided in the mounting sleeve so as to be axially movable and non-rotatable and is prevented from co-rotating with the locking pin by way of the mounting sleeve. The top member is vertically movable and adjustable by way of the screw thread by rotation of the locking pin relative to the mounting sleeve as for example, by rotation of the fork head.

Abstract: A lockable caster, more particularly a swivel caster, having a locking dee for locking the running wheel to prevent it from running and/or to prevent the caster-fork from swivelling. In the cavity of the caster-fork is disposed an expanding toggle which takes the form of a foot-operated control lever, which is pivotally mounted in a socket, and is guided by a guide lug in a guide slot. On the trailing side of the caster, the expanding toggle is pivotally mounted below the fork back in a socket of a resilient or spring-loaded locking rocker. The fork back and locking rocker enclose the expanding toggle between themselves with prestressing. The guide slot may be disposed in the rear portion of the caster-fork. The guide lug takes the form of a resetting cam which in the locking position extends out of the guide slot to form a foot-operated cam to tilt the expanding toggle back into its release position.