Patents Examined by John C. Butler
  • Superconducting motor
    Patent number: 5581135
    Abstract: A superconducting motor comprising an armature provided on a ro tative shaft, magnet portions disposed opposite to said armature, coolant containers for containing said magnet portions and coolant, coolant pipes connected to said coolant containers for supplying the coolant, wherein each of said magnet portions comprises a superconductor and a magnetizing coil wound around it and wherein lead wires for supplying a pulse current for magnetization are connected to said magnetizing coils.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: December 3, 1996
    Assignee: IMRA Material R & D Co., Ltd.
    Inventors: Yoshitaka Ito, Yousuke Yanagi, Tetsuo Oka, Ryohei Yabuno, Shintaro Harada, Tutomu Sakakibara
  • Electric motor, particularly a commutator motor sealed to be liquid-tight, for driving an axially flange-mounted hydraulic pump
    Patent number: 5576586
    Abstract: An electric motor and drive housing assembly includes a motor housing having an open end and a drive housing. The motor housing is affixed to the drive housing such that the opening of the motor housing faces the outer surface of the drive housing. A rotor accommodated in the motor housing has a rotor shaft supported in the motor housing and extending through the opening. A commutator is mounted on the rotor shaft in a region of the opening. A shaft bearing is mounted on the rotor shaft in a region of the opening. A brush carrier plate is attached to the motor housing and closes the opening. The brush carrier plate forms an end plate of the motor housing and a liquid-tight seal between the motor housing and the drive housing. Brushes are mounted on the brush carrier plate for cooperation with and shifting movement with respect to the commutator. Further, a centering arrangement is provided in the brush carrier plate for centering the shaft bearing.
    Type: Grant
    Filed: October 4, 1994
    Date of Patent: November 19, 1996
    Assignee: Licentia Patent-Verwaltungs-GmbH
    Inventor: Rainer Blumenberg
  • Electrical synchronous machine with smooth poles and with a constant air gap
    Patent number: 5563460
    Abstract: An electrical synchronous machine of the type with smooth poles and with a constant air gap, comprising a rotor (2) in which the coils are accommodated in notches (4) extending from the periphery of the rotor and which is provided with a device of axial and if need be radial ventilation channels (8) and (9) and wherein the notches (4) over a polar pitch are directed in parallel relation to the axis of the pole and their depth (a) is chosen so as to increase the cross-section of the central zone defined by the bottoms of the notches (4) and comprising axial ventilation channels (8).
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: October 8, 1996
    Assignee: ABB Industrie
    Inventor: Brahim Ammar