Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8040005 | Plastic pole housing for an electric motor A housing assembly for an electric motor includes a sealed plastic enclosure having a body portion having a nose and an open end opposite from the nose. The open end provides access to an interior region of the plastic enclosure. The housing assembly also includes a... | 10/18/2011 |
| 7423405 | Electromagnetic rotating machine In order to obtain an electromagnetic rotating machine of lightweight and high energy efficiency, which produces big torque for rotating a large-diameter fan, a coil A and coil B as excitation coils are disposed on an inner peripheral surface of a fan casing so as t... | 09/09/2008 |
| 7211917 | Motor with a magnet fixed on the inner peripheral face of a circumferential wall A motor includes a circumferential wall part of a case provided with an opening part on one end side in an axial direction and at least a magnet fixed to the inner peripheral face of the circumferential wall part. At least a part of the outer peripheral face of the ... | 05/01/2007 |
| 7112906 | Motor rotor and manufacturing method thereof A motor rotor. The motor rotor adapted to be used in a fan includes a hub, a metal plate and a magnet. The metal plate has a first end and a second end. The metal plate is disposed in the hub. The magnet is disposed in the metal plate. A method for manufacturing a m... | 09/26/2006 |
| 7064467 | Commutator motor A commutator motor includes a stator and a rotor, and the stator includes a stator yoke and a field magnet. The field magnet is fixed onto the inner peripheral surface of the substantially cylindrical stator yoke. The stator yoke is configured by coaxially stacking ... | 06/20/2006 |
| 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 |
| 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 |
| 6836954 | Rotor for an electronically commutated motor and improved method for the mass production thereof Rotor for an electric motor that comprises a core (1), segments of a cylinder (5, 6, 7) made of magnetizable materials, a substantially cylindrical retaining wrapper (10) whose end portions are joined to at least a pair of plane elements (8, ... | 01/04/2005 |
| 6452300 | Laminated stator yokes A stator yoke formed with a plurality of layers of similarly sized metal sheets is disclosed. A plurality of gaps extend through the stator yoke between ends of the metal sheets. The gaps decrease in size from an outer layer to an inner layer of the stato... | 09/17/2002 |
| 5175460 | Flat yoke type DC machine A DC motor including a rotatable armature, a pair of permanent magnets functioning as magnetic stator poles, and a flat yoke having a pair of opposed arcuate sections and a pair of opposed flat sections, for receiving the armature. Each of the arcuate sec... | 12/29/1992 |
| 5160867 | Motor field assembly A motor field assembly and method for constructing a permanent magnet motor wherein the shell is formed of relatively thick flat sheet stock as two rectangular portions and an elongated connecting portion. The rectangular portions are rolled into semi-cyl... | 11/03/1992 |
| 4838100 | Starter for engine A coaxial type starter used to start an engine of a vehicle is disclosed. The starter includes a d.c. motor having an armature rotary shaft which incorporates an overrunning clutch and six or more magnetic poles which are defined by permanent magnets disp... | 06/13/1989 |
| 4682066 | Alignment system for permanent magnet motors A permanent magnet motor for use in such electrically-powered devices as appliances, power tools, and the like includes a longitudinally-split cylindrical ferromagnetic wrapper having an inner diameter normally less in its free state than the outer cross-... | 07/21/1987 |
| 4467231 | Permanent-magnet d.c. electric motor with resilient stator yoke A d.c. electric motor wherein the permanent magnets are kept in place by elastic fastening means carrying out an active magnetic function. The fastening means preferably includes yoke sectors each formed by two or more superimposed sheet members having an... | 08/21/1984 |
| 4335323 | Stamped sheet metal frame for dynamoelectric machine A dynamoelectric machine is provided with a frame structure consisting of at least two fabricated sheet metal pieces of identical shape and size. The sheet metal members are formed to provide cavities to accommodate an armature structure and bearings, and... | 06/15/1982 |
| 4125791 | Stator for an electrical machine A stator for an electrical machine, comprising an outer ferromagnetic flux return ring, a permanent magnet system arranged inside the flux return ring, and a face plate supporting the flux return ring and the permanent magnet system. The latter comprises ... | 11/14/1978 |
