Patents by Inventor Eiji Narumi

Eiji Narumi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5533595
    Abstract: In a traction-type elevator equipped with a driving sheave (16) positioned at the top of the shaft for ascent and descent (1), cage sheaves (4, 5) are attached to the upper section of the cage (2) and are inclined in relation to this driving sheave (16), and multiple ropes (12, 13, 14) are wound around the outer surface (4a) of this cage sheave and the outer surface (16a) of the above-mentioned driving sheave; the traction-type elevator is characterized in that along with making the outer surface (4a) of the above-mentioned cage sheave (4) parallel to the outer surface (16a) of the driving sheave (16), this cage sheave (4) is divided into multiple sheave pieces (17, 18, 19) according to the abovementioned ropes (12, 13, 14). The ropes (12, 13, 14) are pulled by the driving sheave (16), and even if the cage (2) is caused to move upwardly or downwardly at a high speed, there is essentially no more generation of vibration and noise, because none of the abovementioned ropes (12, 13, 14) twists undesirably.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: July 9, 1996
    Assignee: Otis Elevator Company
    Inventors: Eiji Narumi, Masao Iwasa
  • Patent number: 5276293
    Abstract: A tubular linear primary element is constructed of a plurality of core groups, each core group being constructed of a plurality of laminated comb-shaped plates, each plate having a plurality of radially aligned teeth and slots. The core groups are coupled together radially about an axis with the slots of the core groups facing each other toward the axis. The teeth of each core group are removed at an axial position along the primary into which an approximately ring-shaped reinforcing core is inserted.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: January 4, 1994
    Assignee: Otis Elevator Company
    Inventors: Eiji Narumi, Keiichi Kohroki
  • Patent number: 5270603
    Abstract: A coil-end supporting apparatus comprising a holder comprising retainers for supporting the coil ends of a rotary machinery stator at both ends of a bar- or plate- shaped support and an insert perpendicularly intersecting the intermediate portion of the support in such a manner as to be inserted into a slot of a stator core; the holder supporting the coil ends; and a rotary-machinery stator equipped with the coil-end supporting apparatus.
    Type: Grant
    Filed: April 22, 1992
    Date of Patent: December 14, 1993
    Assignee: Sawafuji Electric Co., Ltd.
    Inventor: Eiji Narumi
  • Patent number: 5249764
    Abstract: A coil-end supporting apparatus comprising a holder comprising retainers for supporting the coil ends of a rotary machinery stator at both ends of a bar- or plate- shaped support and an insert perpendicularly intersecting the intermediate portion of the support in such a manner as to be inserted into a slot of a stator core; the holder supporting the coil ends, and a rotary-machinery stator equipped with the coil-end supporting apparatus.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: October 5, 1993
    Assignee: Sawafuji Electric Co., Ltd.
    Inventor: Eiji Narumi
  • Patent number: 5217091
    Abstract: An overspeed device is provided for an elevator system having an elevator car for travel within a hoistway along a guiderail. The elevator includes a governor rope running from an upper sheave at the top of the hoistway to a governor sheave at the bottom of the hoistway. The overspeed device comprises a centrifugal actuator and a gripping apparatus. In the event of an overspeed condition, the actuator actuates the gripping apparatus which in turn grips the governor rope exiting the governor sheave upwardly toward the upper sheave. The rope, now moving relative to the elevator car, operates a safety attached to the elevator car, thereby safely stopping the car.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: June 8, 1993
    Assignee: Otis Elevator Company
    Inventors: Tsutomu Shiina, Eiji Narumi