Patents by Inventor Masayuki Shigeta
Masayuki Shigeta 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).
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Patent number: 6557306Abstract: To provide sufficient clearance for an entrance part of an elevator hall facing a non-seismic isolation building portion, the partition wall on the entrance side may be removed and an expansion floor provided between the non-seismic isolation building portion entrance and the elevator shaft landing. A movable wall is provided between partition members located on the right and left sides of the elevator shaft. The expansion floor can move in the front and back directions with the partition members on the right and left sides as a guide. Furthermore, the wall moves with the elevator shaft independently in the right and left directions and follows the non-seismic isolation building movement.Type: GrantFiled: August 28, 2000Date of Patent: May 6, 2003Assignees: Hitachi, Ltd., Hitachi Mito Engineering Co., Ltd.Inventors: Yuji Sekiya, Masayuki Shigeta, Sadanori Kuroda
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Patent number: 5323878Abstract: A braking apparatus is provided for an elevator which includes a cage, a counterweight, a main sheave, a motor for rotating the main sheave, a deflector sheave, and a rope wound around the main sheave and the deflector sheave, the rope extending from the cage to the counterweight. The braking apparatus comprises a first brake for the main sheave, and a second brake for the deflector sheave. Both brakes are controlled to apply an appropriate braking force to the cage in accordance with the load and the speed of the cage.Type: GrantFiled: August 20, 1992Date of Patent: June 28, 1994Assignee: Hitachi, Ltd.Inventors: Ichiro Nakamura, Tsuyoshi Ogasawara, Masayuki Shigeta, Masakatsu Tanaka
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Patent number: 5265701Abstract: In an elevator, for controlling the upward and downward movement of a cage, a shoe is brought into and out of pressing contact with a drum or a disk of a brake by a combination of a spring and a hydraulic cylinder. The optimum braking force is determined in accordance with the inertial mass and the speed of the cage to be braked, and the fluid pressure is controlled to control the force of pressing of the shoe against the drum or the disk, so that the brake can always produce the optimum braking force. A controller for controlling the pressure of the hydraulic cylinder is operated by an emergency power source. The brake can be controlled with a high responsibility and its braking force can be controlled arbitrarily, and even in the event of a power failure, the brake can be operated by the emergency power source of a small-capacity.Type: GrantFiled: March 9, 1992Date of Patent: November 30, 1993Assignee: Hitachi, Ltd.Inventors: Tsuyoshi Ogasawara, Ichiro Nakamura, Haruo Watanabe, Masayuki Shigeta, Masakatsu Tanaka
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Patent number: 5255759Abstract: An apparatus for preventing a vibration of an elevator tail-line having one stationarily held end and an opposite end connected to an elevator carriage to move together therewith. An absorber absorbs the vibration of the elevator tail-line, and a supporter bears a weight of the elevator tail-line to prevent the weight of the elevator tail-line from being applied to the absorber so that the absorber does not bear the weight of the elevator tail-line.Type: GrantFiled: July 1, 1992Date of Patent: October 26, 1993Assignee: Hitachi, Ltd.Inventors: Hiroaki Kasai, Masayuki Shigeta
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Patent number: 5244060Abstract: An elevator apparatus is provided with a hoisting unit including a drive sheave for winding a rope around it. The hoisting unit includes a rotary member. The rope has a car attached at one end thereof for suspending. A braking force is applied to the rotary member by a biasing unit. The braking force against the rotary member is released by a releasing unit, and is reduced by a reducing unit. In emergency stop of such an elevator apparatus, slipping of the rope is not caused to control the braking force with ease.Type: GrantFiled: May 8, 1992Date of Patent: September 14, 1993Assignee: Hitachi, Ltd.Inventors: Masakatsu Tanaka, Masayuki Shigeta, Jun Sugahara, Masanobu Itoh, Ichiro Nakamura
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Patent number: 5193651Abstract: An elevator apparatus includes guide devices having guide members engaged with a pair of guide rails so as to guide a car along the guide rails in a manner to hold the car in a proper position. Each of the guide devices includes a resilient support member having a small spring constant supporting the guide member in such a manner that the guide member is movable in a direction perpendicular to a plane of the guide rail. An axis of suspension of the car is deviated from a position of a center of gravity of the car so as to cause a guide load, acting on a side surface of the guide rail via the guide member in a direction perpendicular to the plane of the guide rail, to have a deflected load acting on the guide rail in one direction. The guide device further includes an anti-deflected load generating device for generating an anti-deflected load in a direction to reduce a deflected load component of the guide load produced by the above deviation.Type: GrantFiled: September 10, 1991Date of Patent: March 16, 1993Assignee: Hitachi, Ltd.Inventors: Masayuki Shigeta, Tadashi Shibata, Jun Sugahara, Toshihiko Nara, Kiyoyasu Mitsumori
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Passenger transport installation, vehicle for use therein, and method of operating said installation
Patent number: 5090515Abstract: A passenger transport installation in which a large number of people can be efficiently transported between at least two vertically-spaced places. Stations communicate with a vertical elevator passage or passages along which vehicles can move upward and downward, and the vehicles stop at the stations to allow passagers to get on and off. While passengers get on and off the vehicles at the stations, other vehicles carrying other passengers can move upward and downwardly along the elevator passage or passages.Type: GrantFiled: March 19, 1990Date of Patent: February 25, 1992Assignees: Hitachi, Ltd., Hitachi Elevayor Engineering and Service Co., Ltd.Inventors: Tastuhiko Takahashi, Jun Sugahara, Toshihiko Nara, Yuki Yamamoto, Yoshinari Atsumi, Hideaki Seki, Katutaro Masuda, Nobuyoshi Sato, Masanobu Itoh, Masayuki Shigeta, Eiji Ikeda, Hiroshi Kinoshita, Shinkei Kakami -
Patent number: 4249641Abstract: A speed control system for a hydraulic elevator, in which, actuating a hydraulic pump by driving an induction motor in forward direction, oil is supplied to a hydraulic cylinder for upward travel of an elevator cage, while the hydraulic pump is driven to discharge the oil from the hydraulic cylinder by driving the induction in reverse direction for downward travel of the cage. The induction motor is a single two-speed motor, which is switched to drive the hydraulic pump in one of the two speeds as desired, thus subjecting the elevator cage to two-speed control.Type: GrantFiled: November 14, 1978Date of Patent: February 10, 1981Assignee: Hitachi, Ltd.Inventors: Mitsuaki Takenoshita, Masayuki Shigeta
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Patent number: 4117908Abstract: An elevator including a rope vibration suppressing device provided on the floor of a machinery room, on the top of a elevator cage or on the top portion of balancing weight means to prevent lateral vibration of ropes which may otherwise be produced when a building in which the elevator is equipped is laterally swung.Type: GrantFiled: November 14, 1972Date of Patent: October 3, 1978Assignee: Hitachi, Ltd.Inventors: Toshihiko Nara, Norihiko Mitsui, Masayuki Shigeta
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Patent number: 4113064Abstract: An elevator car mounting arrangement for an elevator of the type comprising a car for carrying passengers or freight mounted in a framework hung by a wire rope and guided in its ascent and descent along guide rails fixed to a shaft. The car is arranged such that it can oscillate freely in a horizontal direction whereby the transversal vibration of the car can be prevented.Type: GrantFiled: November 29, 1973Date of Patent: September 12, 1978Assignee: Hitachi, Ltd.Inventors: Masayuki Shigeta, Tadashi Shibata
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Patent number: 4038848Abstract: A roll eccentricity control apparatus for use with an automatic gage control device of gage meter type for a rolling mill comprising rolls for rolling the material to be rolled, a hydraulic jack for providing the rolls with rolling pressure, a flow rate control valve and a valve control device for adjusting the roll gap by controlling the quantity of oil in the hydraulic jack, a setting device for applying a desired gage command to the valve control device and a gap detector for detecting the roll gap and feeding back the detected value to the valve control device; said apparatus comprising a correlation detector for detecting the correlation between the rolling pressure and a reference signal wave obtained from a roll rotation signal, a memory for storing the output of the correlation detector, and a device for retrieving the correlation output stored in the memory by the use of a signal associated with the rotation of the rolls and applying a command to the gate control device.Type: GrantFiled: May 29, 1975Date of Patent: August 2, 1977Assignee: Hitachi, Ltd.Inventors: Ken Ichiryu, Masayuki Shigeta, Toyotsugu Masuda, Haruo Kinoshita
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Patent number: 4012653Abstract: In an alternating current dynamoelectro machine, the rotor core and/or stator core are axially divided into a plurality of blocks, adjacent blocks of the rotor core and/or those of the stator core are fixed to the rotor shaft and to the motor frame, respectively, at different positions on circumference of respective blocks, whereby an interactive vibration energy between the blocks is absorbed by relative vibrations produced between the adjacent blocks so that vibrations and noises of the machine can be reduced.Type: GrantFiled: October 15, 1974Date of Patent: March 15, 1977Assignee: Hitachi, Ltd.Inventors: Masayuki Shigeta, Ken Ichiryu, Masaki Miura
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Patent number: 3991856Abstract: In an elevator including weight-compensating ropes having their respective one end connected to the lower end of a car and the other end thereof connected to the lower end of a counterweight, an oscillation-absorbing device is provided closely adjacent to at least one of a first connecting portion of the main ropes to a car or the counterweight and a second connecting portion of the weight-compensating ropes to the car or counterweight, thereby absorbing oscillation energy from ropes.Type: GrantFiled: January 25, 1974Date of Patent: November 16, 1976Assignee: Hitachi, Ltd.Inventors: Masayuki Shigeta, Tadashi Shibata, Toshihiko Nara
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Patent number: 3945468Abstract: A sound preventive device for use in an elevator including: a skirt extending from the lower edge of the sill of a cage of an elevator and having a length greater than the difference between the height of the floor and the height of the cage and a width substantially the same as that of the cage; and guide plates which extend upwards and downwards respectively from the rear plate of the cage, the aforesaid guide plates having widths substantially the same as that of the rear plate, whereby abrupt changes in air developing above and below the cage may be minimized by means of the skirt and guide plates.Type: GrantFiled: December 11, 1974Date of Patent: March 23, 1976Assignee: Hitachi, Ltd.Inventors: Masaki Miura, Ken Ichiryu, Masayuki Shigeta, Tadashi Shibata