FUJI KIHAN CO., LTD. Patent applications |
Patent application number | Title | Published |
20150233320 | METHOD FOR MODIFYING SURFACE OF PISTON FOR INTERNAL COMBUSTION ENGINE, AND PISTON FOR INTERNAL COMBUSTION ENGINE - There is provided a piston with a surface modified layer for an internal-combustion engine by a method using a particle to be ejected made of iron-based alloy having a diameter of 20 to 200 μm, a thermal conductivity of 30 W/m·k or less at 25° C., and a specific gravity of 7.5 g/cm | 08-20-2015 |
20140021174 | METHOD FOR REINFORCING WELDING TIP AND WELDING TIP - In order to extend a lifetime of a welding tip in a simple way, a surface reinforcing layer | 01-23-2014 |
20120144890 | INSTANTANEOUS HEAT TREATMENT METHOD FOR METAL PRODUCT - Uniform nano-scale microstructures can be reliably formed on the surface layer of this metal product while still improving the surface roughness and make the surface layer robust enough not to disappear due to wear. The surface of the metal product is repeatedly subjected to instantaneous rapid heating and rapid cooling by intermittently ejecting onto the surface of the metal product shot with a mixture of three or more approximate but different particle sizes for a high ejection density, thereby forming uniform microstructures near the surface of the metal product and forming micro-diameter dimples in the metal surface. | 06-14-2012 |
20100083827 | METHOD FOR SURFACE TREATMENT OF A SKIRT PORTION OF A PISTON FOR AN INTERNAL COMBUSTION ENGINE AND A PISTON FOR AN INTERNAL COMBUSTION ENGINE - A piston allowing a lubrication layer of a resin coating with a low friction coefficient to be tightly adhered to a skirt portion of a piston for an internal combustion engine, with low friction, superior wear resistance, and superior anti-seizing properties and that can reduce wear of a cylinder inner wall even if the lubrication layer is peeled off or abraded, is provided. Metal or ceramic fine particles having an average particle diameter of 20 μm to 400 μm are injected with compressed air or compressed nitrogen as a mixture fluid onto the skirt portion of the piston, made of an aluminum alloy and produced by a method such as casting or forging, at an injection speed of 80 m/s or more or an injection pressure of 0.2 MPa or more to be collided with the skirt portion, thereby uniformly making a microstructure of a piston base material fine-grained in a depth range of 1 μm to 15 μm from a surface of the skirt portion and forming a modified layer with an activated surface. A lubrication layer is formed on the modified layer, for example, by applying a resin with a low friction coefficient, while a surface of the modified layer is being activated. | 04-08-2010 |