An improved guide roller assembly is utilized in a roller guide to guide or direct high-speed rolled stock. The guide roller assembly includes a fixed axle on which a rotatable guide wheel or roller is mounted. A drive ring or turbine wheel is provided within the guide roller. When the guide roller is to be accelerated to the speed of the rolled stock, fluid under pressure is conducted through one or more passages formed in the axle and directed against reaction surfaces formed on the drive ring...

The invention provides a roller bottle for cell growth culturing including a plurality of axial pleats therearound for increasing cell growth surface area and further including circumferential ribs integrally formed therewith for reinforcing the pleated wall structure. These circumferential ribs prevent the bottle walls from bowing outward when the inside of the bottle becomes pressurized during cell growth culturing.

An electroconductive roller including an electroconductive cellular material layer, comprised of a polyurethane composition, which has an average foamed cell diameter not more than 100 .mu.m and a variation .DELTA.D of the foamed cell diameter not more than 50 .mu.m. The electroconductive roller has a hardness variation .DELTA.Hs not more than 8 degrees and a circumferential non-uniformity index R.sub.MAX/R.sub.MIN in an electric resistance thereof not more than 1.3. The electroconductive cellul...

A roller skate including a frame provided to receive a plurality of wheels; a sole adapted to support the user's shod foot; a heel stiffener; a foot retaining arrangement, capable of being in an open state, which enables insertion of the user's foot and, in a closed state, enables adjustment of the foot retaining arrangement around the user's foot, the foot retaining arrangement including: a forefoot anchoring, an instep anchoring, the forefoot and instep anchorings each having a pivot zone abou...

A roller skate comprising a shoe portion having a sole with front and rear regions and a cantilevered member having a free end proximate the front region of the skate and a fixed end opposite the free end. A supporting member is located between and contacting the cantilevered member and the sole. A plurality of front wheels are coupled to each other by a front axle. The front axle biases the free end of the cantilevered member. The skate further includes means for adjusting the position of the s...

In the roller bearing, plural of rollers 15 are interposed between an outer raceway 11 of an outer race 12 and an inner raceway 13 of an inner race 14, and a collar portion 16 is formed along one of the axial-direction end portions of the inner raceway 13. The central portion of one of the outer race and inner raceways 11, 14 and the opposing outer peripheral surface of the roller 15 is formed of a first bus with a given radius of curvature. The two end portion sides adjacent to the central port...

Described is a roller mill (1) for grinding particulate material such as cement raw materials, cement clinker and similar materials, said roller mill (1) comprising a housing (3) which surrounds a grinding table (7) which is rotatable about a vertical axis (5), said grinding table being supported via a support (9) by a machine foundation (11), at least one roller (13) rotatable about a substantially stationary axis (12), said roller being configured for interaction with the grinding table (7) an...

A roller skate shoe has cavities, closing members and roller assemblies. A sole of the shoe is formed with the cavities. Two sides of each cavity are formed with notched slots. The closing member is accommodated in the cavity. The closing member has a closing side for closing the cavity, and is formed with two cut edges corresponding to the notched slots. The roller assembly mounted on the closing member includes a roller base, a roller body mounted in the roller base, and two control assemblies...

An in-line roller skate including a chassis of which one longitudinal lower portion carries the wheels, on the one hand, and a boot formed by a shell overlying a sole adapted to be fixed on an upper plate of the chassis, on the other hand, the volume of the upper being in communication with the outside so as to obtain the internal ventilation thereof by an air supply, wherein it includes air passages interposed between an external collecting zone and the internal volume of the shell, these air p...

A swivel mounting is made as a double-row roller bearing and has an outer ring with a first outer track and a second outer track, a first inner ring with a first inner track, and a second inner ring with a second inner track which is located axially next to the first inner ring. Two sets of rollers roll between the outer tracks of the outer ring and the inner tracks of the inner rings. The swivel mounting is constructed such that the outer ring with the first inner ring and the second inner ring...