Abstract: On each block side face of the blocks of a V-belt for transmitting high load, a ratio of a dimension extending in a belt thickness direction from a buried cord center line of a corresponding tension band to an upper end of an upper pulley-contact face to a dimension extending in the belt thickness direction from the buried cord center line to a lower end of the upper pulley-contact face is larger than or equal to 4.0, and a dimension extending in the belt thickness direction from the buried cord center line to a middle of the upper pulley-contact face is smaller than or equal to 2.3 mm.

Abstract: On each block side face of the blocks of a V-belt for transmitting high load, a ratio of a dimension extending in a belt thickness direction from a buried cord center line of a corresponding tension band to an upper end of an upper pulley-contact face to a dimension extending in the belt thickness direction from the buried cord center line to a lower end of the upper pulley-contact face is larger than or equal to 4.0, and a dimension extending in the belt thickness direction from the buried cord center line to a middle of the upper pulley-contact face is smaller than or equal to 2.3 mm.

Abstract: On each block side face of the blocks of a V-belt for transmitting high load, a ratio of a dimension extending in a belt thickness direction from a buried cord center line of a corresponding tension band to an upper end of an upper pulley-contact face to a dimension extending in the belt thickness direction from the buried cord center line to a lower end of the upper pulley-contact face is larger than or equal to 4.0, and a dimension extending in the belt thickness direction from the buried cord center line to a middle of the upper pulley-contact face is smaller than or equal to 2.3 mm.

Abstract: The cement composition for extrusion molding including 100 weight parts of a blend comprising a hydraulic material, an aggregate and a fiber; 0.1 to 1.5 weight parts of an extrusion aid, 15 to 45 weight parts of water and 0.01 to 2.0 weight parts of a copolymer. The copolymer includes 50 to 99 weight percents of an unit (a) derived from a polyoxyalkylene derivative represented by the formula (1), 1 to 50 weight percents of an unit (b) derived from maleic anhydride or a dicarboxylic acid represented by the following formula (2) and 0 to 30 weight percents of an unit (c) derived from an additional and copolymerizable monomer.

Abstract: In a cement-based extrusion molding composition, deterioration of productivity due to fluctuation of unburned carbon is prevented by ensuring excellent dispersibility of coal ash mainly composed of fly ash, the extrusion pressure in extrusion molding is reduced, and the strength of a molded product in the same curing condition as in single use of silica sand or silica stone powder is developed. The cement-based extrusion molding composition of the invention comprises: 100 parts by weight of a mixture comprising a hydraulic material, a silicious raw material including fly ash as an essential component and a fiber; 0.1 to 1.5 parts by weight of an extrusion aid; 15 to 45 parts by weight of water; 0.01 to 2.0 parts by weight of a nitrogenous polyoxyalkylene derivative represented by formula (1); and 0.01 to 2.

Abstract: The cement composition for extrusion molding of the present invention comprises 100 weight parts of a blend comprising a hydraulic material, an aggregate and a fiber; 0.1 to 1.5 weight parts of an extrusion aid, 15 to 45 weight parts of water and 0.01 to 2.0 weight parts of a copolymer.

Abstract: The power transmission ability of a belt for high power transmission is predicted. A power transmission ability curve of the belt that does not depend on the layout relative to the pulleys is found, thereby to facilitate evaluation of the belt power transmission ability and designing of the transmission condition of a belt drive system. To this end, for the high power transmission belt, a relational expression between the WD factor which is the pressing force against pulleys per belt unit length and the ST factor which is the effective tension of the belt per unit contact length to the pulleys is found. Based on the relational expression, evaluation of the power transmission ability of the belt is conducted. The WD-ST relational expression becomes a power transmission ability curve which is inherent to the belt B but independent of the layout relative to the pulleys, therefore facilitating evaluation of the belt power transmission ability and designing of the transmission condition of the belt drive system.

Abstract: Disclosed is a belt tooth portion 11 of a toothed belt 8 incorporated in a toothed belt power transmission apparatus for use in equipment for business use. The belt tooth portion 11 comprises tooth root portions 12 formed of circularly arcuate surfaces which are arranged symmetrically with each other in respect to a centerline C2 in the tooth width direction, power transmission portions 13 formed of circularly arcuate surfaces of convex profile which contiguously adjoin the tooth root portions 12 and are arranged symmetrically with each other in respect to the tooth width direction centerline C2, tooth tip portions 14 formed of circularly arcuate surfaces which contiguously adjoin the power transmission portions 13 and are arranged symmetrically with each other in respect to the tooth width direction centerline C2, and a tooth crest surface 15 formed of an approximately flat surface which interconnects the tooth tip portions 14.