Patent application number | Description | Published |
20090008383 | Ceramic Heater and Glow Plug - There are provided a ceramic heater in which a defect, such as generation of a gap at the interface between an insulating substrate and a heat-generating resistor, is unlikely to occur in the course of manufacture or use, and a glow plug using the ceramic heater. A ceramic heater | 01-08-2009 |
20090215348 | INSULATOR FOR SPARK PLUG, AND METHOD FOR MANUFACTURING SPARK PLUG - A method for manufacturing an insulator includes: preparing a press pin and a forming die having a cavity, the press pin including a pin-side spiral portion formed on a first position; filling a raw powder into the cavity; arranging the press pin within the cavity; pressing the raw powder within the cavity along with the press pin, and obtaining a green body formed with a green body-side spiral portion; releasing the green body along with the press pin from the cavity; retreating the press pin with respect to the green body while rotating the press pin relative to the green body around an axis, and extracting the press pin from the green body; and removing an unnecessary portion from the green body. The first position is positioned such that the green body-side spiral portion is located in the unnecessary portion of the green body. | 08-27-2009 |
20100084960 | SPARK PLUG - An object of the invention is to provide a spark plug including an insulator which is difficult to cause breakdown and exhibits higher withstand voltage characteristics. This invention relates to a spark plug | 04-08-2010 |
20100093246 | DEFLECTION INSPECTING DEVICE FOR SPARK PLUG INSULATOR, DEFLECTION INSPECTING METHOD FOR SPARK PLUG INSULATOR, AND MANUFACTURING METHOD FOR SPARK PLUG INSULATOR - A device for inspecting a spark plug insulator for bending, the spark plug insulator including a cylindrical body having a radially enlarged flange at an axially intermediate portion thereof, and a through hole formed in the body along an axial direction of the body. The inspection device includes an insulator supporting means for supporting the spark plug insulator so as to be slidable in an axial direction of the spark plug insulator, a linear inspection pin that is to be inserted into the through hole of the spark plug insulator supported by the insulator supporting means, and a detecting means for detecting a sliding movement of the spark plug insulator when the spark plug insulator is caused to slide in the axial direction thereof by the inspection pin by the inspection pin prevented from completely penetrating the through hole of the spark plug insulator owing to bending of the spark plug insulator which exceeds a predetermined tolerance. | 04-15-2010 |
20100136867 | SPARK PLUG AND METHOD FOR MANUFACTURING SPARK PLUG - This invention has an object to provide a spark plug exhibiting high withstand voltage characteristics and high strength at high temperature, formed by an alumina-based sintered body prepared with excellent processability and high productivity, and a method for manufacturing the spark plug. This invention relates to a spark plug | 06-03-2010 |
20100148653 | ALUMINA-BASED SINTERED BODY FOR SPARK PLUG AND METHOD OF MANUFACTURING THE SAME, AND SPARK PLUG AND METHOD OF MANUFACTURING THE SAME - An alumina-based sintered body for a spark plug having enhanced mechanical strength and a method of manufacturing the same, as well as a spark plug having the alumina-based sintered body for a spark plug and a method of manufacturing the same. | 06-17-2010 |
20110000453 | SPARK PLUG - An isolation portion (P) of an insulator ( | 01-06-2011 |
20110005485 | INSULATOR FOR SPARK PLUG, PROCESS FOR PRODUCING THE INSULATOR, SPARK PLUG, AND PROCESS FOR PRODUCING THE SPARK PLUG - A method for manufacturing a ceramic insulator for a spark plug. | 01-13-2011 |
20120055018 | INSULATOR FOR SPARK PLUG, AND METHOD FOR MANUFACTURING SPARK PLUG - A method for manufacturing an insulator includes: preparing a press pin and a forming die having a cavity, the press pin including a pin-side spiral portion formed on a first position; filling a raw powder into the cavity; arranging the press pin within the cavity; pressing the raw powder within the cavity along with the press pin, and obtaining a green body formed with a green body-side spiral portion; releasing the green body along with the press pin from the cavity; retreating the press pin with respect to the green body while rotating the press pin relative to the green body around an axis, and extracting the press pin from the green body; and removing an unnecessary portion from the green body. The first position is positioned such that the green body-side spiral portion is located in the unnecessary portion of the green body. | 03-08-2012 |