Abstract: A glow plug includes a cylindrical housing having an axial hole which extends in the direction of an axis and provided with, on an outer circumferential surface thereof, a screw portion for being screwed into a mounting hole of an internal combustion engine, and a heater member inserted into the axial hole in a state where at least front end portion thereof projects from a front end of the housing. The housing includes a tool engagement portion which is provided at a rear end side than the screw portion and to which a tool is engaged when the being mounted to the internal combustion engine. An inner circumference of the tool engagement portion has a shape which follows an outer circumferential shape of the tool engagement portion.

Abstract: A glow plug includes a cylindrical housing having an axial hole which extends in the direction of an axis and provided with, on an outer circumferential surface thereof, a screw portion for being screwed into a mounting hole of an internal combustion engine, and a heater member inserted into the axial hole in a state where at least front end portion thereof projects from a front end of the housing. The housing includes a tool engagement portion which is provided at a rear end side than the screw portion and to which a tool is engaged when the being mounted to the internal combustion engine. An inner circumference of the tool engagement portion has a shape which follows an outer circumferential shape of the tool engagement portion.

Abstract: A novel ruthenium complex which is a highly efficient catalyst useful for the production of optically active 3-quinuclidinols, and a process for production of optically active 3-quinuclidinols using the ruthenium complex as a catalyst, where the optically active 3-quinuclidinols are useful as an optically active, physiologically active compound utilized in medicines and agrichemicals or as a synthetic intermediate such as a liquid crystal material.

Abstract: A novel ruthenium complex which is a highly efficient catalyst useful for the production of optically active 3-quinuclidinols, and a process for production of optically active 3-quinuclidinols using the ruthenium complex as a catalyst, where the optically active 3-quinuclidinols are useful as an optically active, physiologically active compound utilized in medicines and agrichemicals or as a synthetic intermediate such as a liquid crystal material.

Abstract: A combustion promoter for an internal combustion engine comprising a cylinder having a combustion chamber therein, a main piston movable within the cylinder, a sub-piston mounted on an inner wall of the main piston, and a sub-cylinder surrounding the projecting portion of the sub-piston and defining a sub-cylinder chamber. The sub-piston is driven in relation to the stroke of the main piston toward the combustion chamber until the main piston has reached a position in the vicinity of top dead center of a compression stroke. Gas in the combustion chamber is then introduced into the sub-cylinder chamber where it is stored. The sub-piston is next moved rapidly away from the combustion chamber to eject the gas stored in the sub-cylinder chamber into the combustion chamber, thereby promoting combustion of the gas.

Abstract: A combustion device for an internal combustion engine which includes a cylinder, a head closing one end of the cylinder, and a piston reciprocable in the cylinder. The head and piston have stepped portions adapted to interfit as the piston approaches the head so as to define a compression chamber and a combustion chamber of greater volume than the compression chamber, for receiving a fuel charge, and a restricted passage between the combustion chamber and the compression chamber. The head and piston are shaped and the device is otherwise provided with structure so that as the piston approaches dead center, a portion of the charge compressed in the compression chamber combusts spreading combustion gases and flame through the restricted passage so as to immediately thereafter cause swirling of, and ignite the portion of the charge in, the gases in the combustion chamber.