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| Number | Title | Issue Date |
| 7352100 | Direct-current motor A stator of a direct current motor includes six magnetic poles. An armature of the direct current motor includes an armature core having eight slots, a plurality of windings wound around the armature core as concentrated windings, and a commutator having twenty-four... | 04/01/2008 |
| 7183683 | Inner magnet of a magnetic coupling An inner magnet assembly for a rotary magnetic coupling, the inner magnet assembly having an inner ring body with magnet guides, magnets and an overlying sleeve. ... | 02/27/2007 |
| 7166947 | Permanently excited electrical machine An electrical machine, in particular a direct current motor for vehicles, has a multi-pole stator which has an annular pole housing (1) and a plurality of magnets (2) that are located on the inside face of the pole housing (1). The electrical ma... | 01/23/2007 |
| 7119469 | Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing A stator assembly for an electric motor includes a stator housing, a flux ring inserted into the stator housing after the stator housing is formed and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the ... | 10/10/2006 |
| 7091642 | Field assembly for a motor and method of making same A cylinder/magnet assembly for a field of an electric machine, such as a stator of a brush type motor or a rotor of a brushless motor, alternator or generator, is formed by stamping a blank to form anchors extending upwardly from a surface of the blank and stamping ... | 08/15/2006 |
| 7088024 | Field assembly for a motor and method of making same A stator of an electric motor is formed by inserting pre-formed magnets on a cylinder having anchors and plastic is molded around the magnets and anchors to secure the magnets to a surface of the cylinder, forming a cylinder/magnet assembly. A pilot feature is forme... | 08/08/2006 |
| 7038343 | Field assembly for a motor and method of making same A cylindrical magnet ring assembly having a cylinder magnet flux ring (102) formed with a plurality of inwardly projecting anchors (108); a plurality of permanent magnets (104), wherein the magnet can be formed with step portions (112) in... | 05/02/2006 |
| 7030524 | Motor for driving blower fan A reinforcing ring (22) includes a ring portion (23) and a cylinder portion (24) is press fitted on a portion which is slightly shifted toward the rear end side from portions on which stators (2) are fixed on parts of a case body (1 | 04/18/2006 |
| 6983529 | Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing A stator assembly for an electric motor includes a stator housing, an expandable flux ring inserted into the stator housing and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the flux ring, such as by i... | 01/10/2006 |
| 6903475 | Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing A stator assembly for an electric motor includes a stator housing, an expandable flux ring inserted into the stator housing and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the flux ring, such as by i... | 06/07/2005 |
| 6710493 | Dynamo-electric machine having tapered magnets secured to yoke A rotor and each magnet are configured to satisfy one of the following conditions: (Dπ/Z)Xn+T | 03/23/2004 |
| 6643911 | Method of manufacturing yoke through multistage-drawing process A plate material is drawn to form a first-drawing product in the shape of an elliptically cylindrical container having an elliptical cross section. Then, the first-drawing product is drawn to form a re-drawing product in the shape of a generally circular ... | 11/11/2003 |
| 6568064 | Method of manufacturing motor yoke In a method of manufacturing a partly flat yoke having curved circumferential walls to which magnets are to be attached and having parallel flat circumferential walls which constitute main magnetic paths and whose each radial thickness is larger than that... | 05/27/2003 |
| 6342744 | Direct current motor using magnets with extensions A direct current motor is comprised of an armature, magnets arranged to face each other through the armature, a commutator and brushes. The armature has a core and a plurality of coils wound on the core. Each magnet has a main part and an extension extend... | 01/29/2002 |
| 5881446 | Method of manufacturing an electric rotating machine An electric rotating machine and manufacturing method of the same is provided that can securely press-fit magnetic poles against an inner circumference of a yoke with a cylindrical body. By directly contacting a first and second end portions of the cylind... | 03/16/1999 |
| 5869913 | Electric motor using permanent field magnets In an electric motor comprising a plurality of permanent magnets (46) surrounding a motor armature (52) for supplying field flux to the armature, a cylindrical magnet cover (47) is fitted into an inner circumferential surface defined by the permanent magn... | 02/09/1999 |
| 5698914 | Starter with a discharge hole on a yoke In a starter motor for a starter, a plurality of permanent magnets are arranged circumferentially inside a cylindrical yoke and outside an armature. A cylindrical sleeve is fitted with the permanent magnets to radially outwardly fix the permanent magnets ... | 12/16/1997 |
| 5679994 | Electric rotating machine with improved cylindrical magnet retainer An electric rotating machine and manufacturing method of the same is provided that can securely press-fit magnetic poles against an inner circumference of a yoke with a cylindrical body. By directly contacting a first and second end portions of the cylind... | 10/21/1997 |
| 4873461 | Electric motor sterilizable surgical power tool An electric motor suitable for use in a steam sterilizable surgical tool comprising a casing with a peripheral wall, plural magnets, an armature and structure rotatably supporting them in the casing, structure locating the magnets axially and circumferent... | 10/10/1989 |
| 4707630 | Magnetic cover member for magnetic poles of DC motor In a permanent type DC motor, a stator comprises a yoke and a plurality of magnetic pole pairs composed of permanent magnets and auxiliary poles. The plurality of magnetic pole pairs are held and fixed in intimate contact with the yoke by pressingly defor... | 11/17/1987 |
