Abstract: A grease extractor includes a centrifugal fan for forcibly flowing grease laden air in order to remove grease therefrom in cooperation with a trap member. The grease extractor comprises a vessel with an inlet for introduction of the grease laden air and an outlet for discharging clear air. The fan, which has a rotation axis and has a circumferential fan surface, is disposed between the inlet and the outlet to be rotated about a rotation axis so as to generate a forced flow of the air for introducing the grease laden air inwardly and flowing it radially outwardly through the circumferential fan surface. The fan includes impellers which deflects the grease laden air to separate the grease therefrom and coagulate it into corresponding grease particles. Flow converting members are provided on the circumferential fan surface for converting the radial air flow into an axial flow directed outwardly substantially along the rotation axis.

Abstract: A bonding method using, as bonding agent, brazing filler metal, or composite plating, or a combination of composite plating and ceramic spraying. In the first case, there are provided on the bonding region titanium powder and brazing filler metal alloyable with the titanium and having a lower melting point than titanium. The heating temperature is set higher than the melting point of the brazing filler metal but not so high to melt titanium. In the second case, the bonding region is coated with composite plating. Plating base material is made of metal alloyable with titanium and having a lower melting point than titanium. Titanium powder is diffused into the plating base material. The heating temperature is set higher than the melting point of the plating base material but not so high to melt titanium. In the last case, the bonding region is coated with the above composite plating, and further covered with ceramic spraying. The heating temperature is set in the same manner as the second case.

Abstract: A sputtering system including a workpiece and at least one target located in a vacuum reaction furnace, wherein a magnetic field is generated between the workpiece and the target and a electric field perpendicular to the magnetic field generated between the workpiece and the target is additionally generated. A plurality of targets may be located around the workpiece and either the workpiece or the targets may be rotated when the magnetron discharge is generated.

Abstract: This invention relates to a retort type apparatus for ion-nitriding treatment which is so designed as to effect heating and nitriding of a workpiece at high thermal efficiency, with excellent uniformity and in a short time, by using both glow discharge and heat produced by a heating element.

Abstract: This invention relates to a retort type apparatus for ion-nitriding treatment which is so designed as to effect heating and nitriding of a workpiece at high thermal efficiency, with excellent uniformity and in a short time, by using both glow discharge and heat produced by a heating element.

Abstract: Engine cylinder block made of an aluminum alloy containing in weight 4 to 14% of Si, 1 to 5% of Cu and 0.2 to 0.8% of Mg. Method for manufacturing the cylinder block includes a heat treatment step after moulding of such aluminum alloy.

Abstract: An ion-nitriding process in which workpieces are subjected to a two-step glow discharge in a nitrogen and hydrogen atmosphere, there being a larger nitrogen to hydrogen ratio in the second step.

Abstract: The present invention provides an ion-nitriding process wherein a workpiece having at least one aperture is subjected to a DC voltage in an atmosphere of nitrogen-containing gas, characterized in that a first nitriding step is carried out under a vacuum which is strong enough to suppress arc discharge on the workpiece, and a second nitriding step is carried out under a weaker vacuum as compared to that in the first step so that glow discharge is produced even in the aperture of the workpiece.

Abstract: An ion-nitriding apparatus wherein heating and nitriding of workpieces can be carried out at high thermal efficiency, with excellent uniformity and in a short time by the combined use of glow discharge and heat generated by a heat-producing element. Heating efficiency can be raised in heating of workpieces by lessening the heat value to be released out of the furnace, and overheating of workpieces can be prevented in nitriding of them by increasing the heat value to be released out of the furnace in proportion to the increase of glow discharge output, and thus the nitriding efficiency can be raised.

Abstract: An ion-nitriding apparatus which is designed so that in heating and nitriding a workpiece by the combined use of glow discharge and heat generated by a heat-producing element, uniform temperature distribution of the workpiece during glow discharge can be obtained, thereby preventing overheating of the workpiece and realizing uniform heating and uniform nitriding of the workpiece.

Abstract: This invention relates to an apparatus for continuous glow discharge nitriding treatment whereby a workpiece is treated while it is being transferred in a vacuum chamber. It comprises a heating means to heat the workpiece up to the suitable temperature at which glow discharge nitriding is going on steadily, a heat-retaining means to keep the heated workpiece at said temperature and a discharge means to carry out discharge nitriding by glow discharge.