MITSUBISHI MATERIALS PMG CORPORATION Patent applications |
Patent application number | Title | Published |
20120244029 | SLIDING PART AND METHOD OF MANUFACTURING THE SAME - There is provided a sliding part in which a surface coverage ratio of copper in the sliding part increases. A bearing which is the sliding part is formed by filling the raw powder into the filling portion of the forming mold, compacting the raw powder to form a powder compact, which is sintered. A copper-based raw powder is composed of a copper-based flat raw powder whose diameter is smaller than that of an iron-based raw powder and an aspect ratio larger than that of the iron-based raw powder, and a copper-based small-sized raw powder whose diameter is smaller than that of the copper-based flat raw powder. The copper is allowed to segregate at the surface of the sliding part. The surface of the bearing is covered with the copper-based small-sized raw powder and the copper-based flat raw powder, thereby the surface coverage ratio of copper can be increased. | 09-27-2012 |
20100158734 | INTERNAL GEAR PUMP - In an internal gear pump of the present invention, a first angle that is formed by a first straight line that connects a rotation axis of an inner rotor to a tooth tip portion of an external tooth in the rotational direction of the inner rotor and an outer rotor, and a second straight line that connects the rotation axis to a meshing portion of the external tooth is not less than 1.4 times the size and not more than 1.8 times the size of a second angle that is formed by a third straight line that connects the rotation axis to a tooth bottom of the external tooth, and the second straight line. | 06-24-2010 |
20100141056 | RECIPROCATING ENGINE - A reciprocating engine includes: an inner stator having an axis; a mover that has a cylindrical shape and is placed coaxially around the inner stator, and that moves reciprocatingly along the axis; and an outer stator that has a cylindrical shape and is placed coaxially around the mover, wherein the outer stator has: an aperture portion that is formed in an inner circumferential surface thereof that faces the mover; an internal space that opens via the aperture portion; and a wound wire coil that is placed inside the internal space, and wherein the mover has: a field magnet portion; and restoring magnet portions that are provided respectively at both end positions along the axis of the field magnet portion. | 06-10-2010 |
20090311129 | ABRASION RESISTANT SINTERED COPPER BASE CU-NI-SN ALLOY AND BEARING MADE FROM THE SAME - A Cu—Ni—Sn copper-based sintered alloy has a composition including 10 to 40% by mass of Ni, 5 to 25% by mass of Si, and the remainder containing Cu and inevitable impurities, and if necessary, 0.1 to 0.9% by mass of P, 1 to 10% by mass of C, 0.3 to 6% by mass of calcium fluoride or 0.3 to 6% by mass of molybdenum disulfide. In the structure of the alloy, a phase of a composition containing Cu | 12-17-2009 |
20090174512 | IRON POWDER COATED WITH Mg-CONTAINING OXIDE FILM - Oxide-coated Fe powder for producing various electromagnetic circuit components requiring high resistivity is provided. The oxide-coated Fe powder is a Mg-containing oxide film-coated iron powder coated with an Mg—Fe—O ternary-based deposition film at least containing (Mg, Fe)O. The (Mg,Fe)O is a crystalline MgO-dissolving wustite. The Mg—Fe—O ternary-based oxide deposition film has a sulfur-enriched layer containing a higher concentration of sulfur than that of central portion of the iron powder, fine crystalline texture having a grain size of 200 nm or less, and the outermost surface is substantially composed of MgO. A composite soft magnetic material using the Mg-containing oxide film-coated iron powder is also provided. | 07-09-2009 |
20090129963 | Sliding Part and Method of Manufacturing the Same - There is provided a sliding part in which a surface coverage ratio of copper in the sliding part increases. A bearing which is the sliding part is formed by filling the raw powder into the filling portion of the forming mold, compacting the raw powder to form a powder compact | 05-21-2009 |
20090011268 | BEARING FOR MOTORIZED FUEL PUMP - A bearing for a motorized fuel pump is made of a Cu—Ni based sintered alloy, composed of: 21 to 35% by mass of Ni, 5 to 12% by mass of Sn, 3 to 7% by mass of C, 0.1 to 0.8% by mass of P, and the balance of Cu and inevitable impurities. A matrix of the bearing is formed with pores with a porosity of 8 to 18%, and the P component is predominantly included at the grain boundary, and free graphite is distributed along the insides of open pores that are open to the surface and extending into the bearing. In this bearing, a Sn rich alloy layer containing equal to or more than 50% by mass of Sn is formed on the insides of the open pores and near openings of the open pores. | 01-08-2009 |
20080232994 | Inner Rotor of Internal Gear Pump - A crankshaft and an mounting hole have two main circular arc parts on the same circle; and two connecting parts for connecting the adjacent main circular arc parts, and have a cross-sectional shape in which the connecting parts facing each other are substantially parallel. The connecting parts of the mounting hole are formed in the shape of a large circular arc which projects inward. The torque of the crankshaft is transmitted to the mounting hole in a state where the connecting parts of the crankshaft and the connecting parts of the mounting hole which are formed in the shape of a large circular arc come into line contact with each other; therefore, the value of any local stress generated in the mounting hole can be reduced. | 09-25-2008 |
20080213117 | Pump Rotor - In pump rotors and used in an internal gear pump, which includes an inner pump rotor having outer gear teeth; an outer pump rotor having inner gear teeth that mesh with the outer gear teeth; and a casing having a pumping-in port through which a fluid is pumped in, and a pumping-out port through which the fluid is pumped out, and pumps in and pumps out the fluid by changing the cell volume formed between gear tooth surfaces of the rotors and so as to carry the fluid when the rotors and mesh with each other and rotate, the rotors are formed from a sintered material of Fe—Cu—C and have a density of not less than 6.6 g/cm | 09-04-2008 |
20080199115 | Oil Impregnated Sintered Bearing and Manufacturing Method Thereof - There is provided an oil-impregnated sintered bearing which enable to prevent oil leakage from an outer peripheral surface | 08-21-2008 |