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| Number | Title | Issue Date |
| 5398397 | Method of manufacturing an electric vehicle An electric vehicle comprising a body, an axle rotatably supported by the body, a rotor supported by the body for rotation about a longitudinal axis, a gearing assembly for selectively drivingly connecting the rotor to the axle, and a stator supported by ... | 03/21/1995 |
| 5382860 | Electromagnetic pump stator core A stator core for supporting an electrical coil includes a plurality of groups of circumferentially abutting flat laminations which collectively form a bore and perimeter. A plurality of wedges are interposed between the groups, with each wedge having an ... | 01/17/1995 |
| 5376850 | Audible noise reduction in a disc drive A spindle motor for a disc drive data storage device in which the stator is isolated from the stationary portion of the motor used to attach the spindle motor to the disc drive housing by use of resilient members interposed between the stator and the stat... | 12/27/1994 |
| 5363003 | Motor and circuitry for protecting same A motor is provided which includes a housing, a stator attached to the cylindrical wall of the housing, a sleeve bearing attached to the inner periphery of the cylindrical wall, a rotor rotatably supported by the sleeve bearing, and a rotor magnet attache... | 11/08/1994 |
| 5338996 | Armature core An armature comprising a number of core sheets each having a number of slots and wherein a plurality of punched-in recesses for fitting are formed on the tail side of each core sheet and a plurality of punched-out protrusions for fitting provided by punch... | 08/16/1994 |
| 5302876 | Rotor of synchronous motor A rotor of a synchronous motor incorporates a rotor core assembly 14 including a rotor core 10 formed by a lamination of ferrosilicone plates and a plurality of permanent magnets 12 arranged on the outer periphery of the rotor core 10. The rotor core asse... | 04/12/1994 |
| 5300845 | Banded electromagnetic stator core A stator core for an electromagnetic pump includes a plurality of circumferentially adjoining groups of flat laminations disposed about a common centerline axis and collectively defining a central bore and a discontinuous outer perimeter, with adjacent gr... | 04/05/1994 |
| 5276958 | Method of manufacturing an electromotor with laminated stator A method of manufacturing an electric motor wherein pole pieces, made of pole laminations provided with outwardly extending projections are assembled into pole piece blocks, which are provided with stator coils premounted thereon. The pole piece blocks ar... | 01/11/1994 |
| 5266859 | Skewing of pole laminations of a switched reluctance machine to reduce acoustic noise The laminations respectively comprising the rotor and stator poles of a switched reluctance machine (SRM) are skewed as they are stacked during machine assembly in order to reduce the tendency of the SRM to flatten and thereby assume an oval shape during ... | 11/30/1993 |
| 5248911 | Laminated stator with improved flux pattern A stator for a fractional horsepower motor has a mounting hole of reduced dimensions for fixing the position of motor mounting brackets which support a rotor. The configuration of the mounting holes increase the area where magnetic flux may pass. One conf... | 09/28/1993 |
| 5227687 | Stator retention mechanism An electrical machine (100) retained within a housing (116) in accordance with the invention includes a stator having a plurality of laminations (136) which are axially joined together to define a stator core (104) having a plurality of slots (106) which ... | 07/13/1993 |
| 5223761 | Electromotor with laminated stator and method of manufacturing the same An electric motor and a method of manufacturing the same, wherein pole pieces, made of pole laminations provided with outwardly extending projections and assembled into pole piece blocks, which are provided with stator coils premounted thereon, are secure... | 06/29/1993 |
| 5218252 | Dynamoelectric machines with stator positioning A machine assembly (10) of a first metallic part (22) having a first coefficient of thermal expansion which is mounted within a second metallic part (12) having a second coefficient of thermal expansion greater than the first coefficient of thermal expans... | 06/08/1993 |
| 5196749 | Stator support and positioning structure for a dynamoelectric machine A support and positioning structure for a stator assembly of an inductor type dynamoelectric machine is disclosed. The stator assembly includes a plurality of stationary C-shaped armature elements circumferentially located about a central longitudinal axi... | 03/23/1993 |
| 5191246 | Magnetically isolated bolts for linear induction motor A primary for a linear induction motor is formed from laminae which are bolted together. The bolts are located in protuberances on the opposite edge to the teeth so as to be outside the path of substantial flux penetration.... | 03/02/1993 |
| 5185547 | Dynamo-electric machine stator core construction Apparatus for aligning the endplates with the core of an electrical generator. To accommodate for relative thermal expansion and contraction between the endplates, having differing coefficients of thermal expansion due to being made of a different materia... | 02/09/1993 |
| 5176946 | Laminated contactor core with blind hole A method of manufacturing a core for an electrical inductive device. A blind hole is provided through a stack of laminations into which an oil or an epoxy resin adhesive is placed. The blind hole provides a slow release for the oil to the outer surfaces. ... | 01/05/1993 |
| 5175462 | Toroidal coil motor A toroidal coil motor characterized by the provision of an annular iron core in which laminate-fixing holes whose number is the least common multiple with respect to the number of magnetic poles and the number of toroidal coils are provided symmetrically ... | 12/29/1992 |
| 5173628 | Brushless motor A brushless motor improving the structure for connecting the stator coil to the substrate to facilitate the operation of connection and assembling. The constitution comprises a rotor having a rotor magnet (11), a stator core (2) on which the stator coil (... | 12/22/1992 |
| 5170086 | Electric motor with toothed disk to secure stator core In an electric motor, a springy disk with internal projections is used to position the iron stator plates of an electric motor by engagement with a soft material of the electric motor bearing support part. The disk is thus fixed with plates of the stator ... | 12/08/1992 |
| 5144182 | Skewed rotor assembly A dynamo assembly comprising a stator assembly and rotor assembly as shown. The preferred rotor assembly comprises two end caps, a single wire strand, a collector ring assembly and a plurality of laminants. The two end caps are preferably identical to one... | 09/01/1992 |
| 5142180 | Direct current motor for operation at elevated temperatures in a hostile environment A permanent magnet motor for operation at elevated temperatures wherein the magnets are clamped to the motor shaft by means of high temperature plastic bushings. The bushings have a coefficient of thermal expansion that exceeds the coefficient of thermal ... | 08/25/1992 |
| 5142179 | Stator structure of built-in motor The stator of a built-in motor must be firmly and accurately mounted on the spindle head housing or the like of a machine tool. A stator core (10), i.e., a principal component of the stator is welded partially at the circumference (14) thereof, and then t... | 08/25/1992 |
| 5142178 | Apparatus for aligning stacked laminations of a dynamoelectric machine An apparatus and method for forming laminations for a stacked lamination assembly of a dynamoelectric machine wherein the laminations of the assembly are provided with displacement segments and complimentary openings of slightly larger dimensional size, t... | 08/25/1992 |
| 5140211 | Rotor structure of a synchronous motor Provided is a rotor structure of a radial type synchronous motor having a rotor core (10) is held between permanent magnets (12) wherein end plates (14) are attached to ends of the rotor (8) in a direction of the central axis (6) of the rotor, each of whi... | 08/18/1992 |
| 5128576 | Rotor assembly and motor construction and method of making same A rotor assembly for an electric motor includes a plurality of laminations disposed in a stack, a tension rod extending axially through the rotor lamination stack, and end clamps disposed at each end of the rotor lamination stack and secured to the tensio... | 07/07/1992 |
| 5121022 | Rotor core structure for an electromagnetic rotating machine A rotor for an electromagnetic energy conversion device, which rotor includes a core composed of a stack of thin plates, is clamped between two end plates by means of a plurality of end clamping fingers. Each clamping finger is initially mounted on a resp... | 06/09/1992 |
| 5091668 | Motor having flux-concentrating permanent magnets A motor having flux-concentrating permanent magnets, the motor including a stator with windings and a rotor including a shaft, a sleeve surrounding the shaft for holding rotor laminations, and permanent magnets. The motor being characterized in that said ... | 02/25/1992 |
| 5075150 | Pack of laminations with projections and depressions in torsionally flexible contact In one embodiment, the pack is torsionally flexible. Pack of laminations comprises laminations which are connected one to another by only a single connection. The single connection is provided by a projection which projects into a depression. The projecti... | 12/24/1991 |
| 5066882 | Stator core assembly In a stator core assembly composed of a plurality of steel punchings, and a plurality of fastening devices including bolts holding the punchings together in a stack and pressing adjacent punchings against one another, the bolts being of a material having ... | 11/19/1991 |
| 5043616 | Induction motor mounted on bolted legs and end plates A construction of an electric induction motor having a stacked stator core (10) arranged around the outer circumference of a rotatable rotor (12) via an annular air gap (14), front and rear housings (20 and 22) arranged at front and rear ends of the stato... | 08/27/1991 |
| 5023502 | Switched reluctance motor rotor Retention tang structure (61-64) is provided on the hub (52) of a switched reluctance motor rotor (50) for retaining electrically insulating material (65-68) in gaps (57-60) between the rotor poles (53-56), and minimizing magnetic flux path lines through ... | 06/11/1991 |
| 5013957 | Motor with toothed disk to secure the stator core The invention relates to an electric motor having a fastening flange 10 and a bearing support part 7 made of plastic or a soft metal, the stator 23 of which is fastened on the outer diameter of the bearing support part 7. At the end of the stator iron cor... | 05/07/1991 |
| 4990809 | Variable reluctance motor A high torque-to-low mass variable reluctance motor includes a cylindrical stator assembly having a plurality of stator segments circumaxially arranged about a rotor wherein adjacent stator segments are maintained in a spaced apart relation with one anoth... | 02/05/1991 |
| 4987330 | Rotor lamination assembly for a dynamoelectric machine An improved laminated rotor assembly is disclosed which features a novel key/keyway design that prevents lamination reversal while permitting indexing of successive laminae for the distribution of dimensional variations thereof. There are multiple, symmet... | 01/22/1991 |
| 4977344 | Rotor assembly and motor construction A rotor assembly for an electric motor includes a plurality of laminations disposed in a stack, a tension rod extending axially through the rotor lamination stack, and end clamps disposed at each end of the rotor lamiantion stack and secured to the tensio... | 12/11/1990 |
| 4972113 | Structure and method of assembly of bearing support means to the stator assembly of an electric motor An electric motor structure and method of assembling the same wherein such structure includes a laminated stator core with a rotor body disposed therein with a rotor shaft extending therefrom to be supported by bearing support end shield means having bear... | 11/20/1990 |
| 4970421 | Electric machines Electric reluctance motors (or generators) using toothed rotor and stator peripheries but with simple spool windings switched by bi-directional power amplifiers useful both for continuous rotation (or linear translation) or stepwise operation. Angular def... | 11/13/1990 |
| 4937486 | Laminated pole In an end-plate-less formed pole (1) for electric machines with salient poles, combined clamping and support elements (26, 27) which are used both for clamping together the single laminations (2) and for supporting the pole coils (41) are provided in the ... | 06/26/1990 |
| 4916803 | Stator keybar installation using auxiliary plates Keybar slots in support plates of a large generator stator are made substantially oversize to accommodate the full probable distortion of the support plates occurring during fabrication of the stator frame. Keybars are affixed to pairs of auxiliary plates... | 04/17/1990 |
