A roller conveyor including a plurality of driven rollers disposed in two parallel tracks. With each driven roller a separate drive motor is associated, which takes the form of a low voltage motor. The drive motors are supplied from at least one low voltage source. They are preferably hub motors, which are operated with direct current. By virtue of the low voltage technology, less expensive components may be used and the safety requirements may be reduced.

The subject of the invention is a retention device for a conveyor roller, characterised in that the roller (7) is mounted on a tilting support (13).

A roller sub system for reducing friction between a tool string and a wall in a well bore for use in the oil and gas industry. The apparatus has a roller body and wheel sub system, which is configured to have removably mounted wheels of variable diameters. A plurality of different diameter wheel sets are described for mounting on the roller sub axles and orientating the system in the well bore. The wheels are fixed to the roller sub axles through a quick-release mechanism. A single apparatus can...

A rolling door or shutter (1) has a series of preferably planar panels (3, 3A) which are joined by pairs (6) of pivotally connected hinge members (7, 8). The shutter slides up and down with its side edges guided in tracks (2). When the shutter is closed, e.g. against a bottom sill, the hinge members of each pair (6) pivot about one another to jam between opposing walls (30, 31) of the guide tracks. The pivotal range of each hinge pair may be limited to prevent the hinge pair from straightening w...

A roller skate includes a shoe body and a wheel portion comprising a front wheel assembly and a rear wheel assembly. The front wheel assembly and the rear wheel assembly can be easily attached to or detached from an underside of the shoe body without tools. The present invention provides a shoe that can be easily converted from a walking or running shoe to a roller skate and vice versa. It is comfortable for the wearer to skate with such roller skate. Moreover, there is no limitation to the size...

A roller bearing for rotatably supporting a rotating shaft of an internal combustion engine between a main body and a cap of the internal combustion engine. The roller bearing including: a plurality of rollers; a retainer which is cirumferentially splittable and supports the plurality of rollers; and an outer race which is cirumferentially splittable and forms a raceway surface for the plurality of rollers. The retainer is split into a plurality of retaining members. The outer race is split into...

A roller turn roller for an industrial conveyor comprises a continuous axle tube having opposed ends and a central axis of rotation, a pair of axially spaced, tapered roller bearings on the axle tube spaced inwardly from its ends, a roller shell supported by the bearings for rotation about the axis of the tube, and a pair of axially spaced retainers secured to the tube with the roller bearings disposed therebetween. Each of the retainers engages a corresponding bearing to pre-load the bearings t...

A contact charging roller includes a support member and a conductive coating member. The conductive coating member is composed of a seamless tube that contains at least (1) a non-polar resin or a styrene-type thermoplastic elastomer excluding a poly(styrene-hydrogentaged butadiene-styrene) block terpolymer and (2) a polar resin or an elastomer having a polar functional group containing at least nitrogen or oxygen, and contains carbon black in an amount of 10% to 60% by mass with respect to the t...

To provide a roller bearing assembly, which can be assembled with a minimized number of assembling steps and without any drop-off preventing sleeve being employed and which can provide a large load bearing capacity, the roller bearing assembly includes an inner race 1 having a raceway surface 1a defined therein, a plurality of rollers 2, and a ring-shaped roller retainer 3 having a plurality of pockets 4 defined therein in a direction circumferentially thereof for accommodating therein the respe...

The cleaning implement includes a shaft having an operator end and a cleaning end, a mop head comprising a liquid-absorbent material and a wringing mechanism. The mop head and the wringing mechanism are movable relative to one another between at least a cleaning position and a plurality of wringing positions. The wringing mechanism includes a roller which compresses at least a portion of the liquid-absorbent material to thereby expel liquid therefrom. The plastic roller has a plurality of spaced...