Patents by Inventor Tsukasa Iio
Tsukasa Iio 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: 5457295Abstract: A circuit breaker-includes: a casing having a base and a main cover secured to the base, the casing accommodating a circuit breaking mechanism; a recesses formed in one surface of the main cover, the opposite surface of which is on the side of the base, the recess being adapted to receive an auxiliary device of the circuit breaking mechanism; and an auxiliary cover mounted on the main cover in such a manner as to close the recess. The circuit breaker is automatically tripped when the auxiliary cover is opened, thus permitting installation of the auxiliary device thereon with high security.Type: GrantFiled: September 23, 1993Date of Patent: October 10, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshiyuki Tanibe, Hiroshi Fujii, Shinji Yamagata, Shinsaku Yamasaki, Tsukasa Iio, Yoshiaki Kobayashi, Setsuo Hosogai, Kouhei Fujiwara, Shirou Murata
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Patent number: 5324088Abstract: A suspension apparatus for suspending a truck-type circuit breaker or the like when the circuit breaker is put on or taken off a truck of a switchboard frame comprises a suspension adapter to be engaged with a first hollow provided on a side face of the circuit breaker and a stopper provided on the suspension adapter to be engaged with a second hollow provided on a top face of the circuit breaker.Type: GrantFiled: February 23, 1993Date of Patent: June 28, 1994Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tsukasa Iio, Takayoshi Ishikawa
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Patent number: 4882556Abstract: A multi-pole circuit interrupter comprising an electrically insulating housing having two side walls and at least two partition walls defining therebetween a central compartment and at least two side compartments. A central pole unit is disposed within the central compartment and a side pole unit is disposed within each of two side compartments. Each of the units includes a stationary contact element, a movable contact arm, an arc extinguisher and terminals for the external connection. The distance between a center line passing through the centers of the stationary contact element, the movable contact arm and the arc extinguisher of each of the pole units is smaller than the distance between the center lines passing through the terminals of each pole unit, so that the thickness of the housing side wall can be increased without increasing the overall width dimension of the housing.Type: GrantFiled: November 1, 1988Date of Patent: November 21, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Fujii, Tsukasa Iio, Yasusi Genba, Hideaki Moriwaki, Yoshinori Mochizuki
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Patent number: 4808953Abstract: In a circuit breaker having electromagnetic tripping device (55), thermal tripping device (56,57), and adjusting device (59-64), the adjusting device (59-64) is disposed above the thermal tripping device (56,57) in perpendicular direction to power source side-load side direction, and the adjusting device (59-64) has an arm (69) for transmitting adjusting actions from an adjusting dial (24) to a movable iron core (55a) of the electromagnetic tripping device (55), and such constitution enables to shorten a configuration in the power source side-load side direction, and enables to compensate loose-assembly or deformations of the adjusting device (59-64), and thereby initial setting for the adjusting device (59-64) becomes correct.Type: GrantFiled: September 17, 1987Date of Patent: February 28, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tsukasa Iio, Yoshinori Mochizuki, Yasusi Genba, Hiroshi Fujii, Hideaki Moriwaki
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Patent number: 4799037Abstract: A circuit interrupter comprises, in a housing, a movable contact assembly having a movable contact carrier and a contact arm supporting the movable contact carrier, and a cross bar secured to the movable contact assembly for allowing the movable contact assembly to rotate thereabout. The circuit interrupter also comprises a bearing assembly secured to the housing for rotatably supporting the cross bar, and the bearing assembly has a stop surface capable of being engaged by the movable contact assembly for determining the OFF position of the movable contact assembly.Type: GrantFiled: September 4, 1987Date of Patent: January 17, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tsukasa Iio, Yoshinori Mochizuki, Hiroshi Fujii, Yasusi Genba, Hideaki Moriwaki
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Patent number: 4786771Abstract: A circuit interrupter comprises a toggle link having an upper toggle link and a lower toggle link pivotally connected by a knee pin to each other, a movable contact arm having a movable contact element secured thereon and connected to the lower toggle link of the toggle link, and a toggle link stopper capable of contacting the upper toggle link for preventing the bouncing back of the movable contact arm during tripping of the movable contact arm. The toggle link stopper is provided with a first stop surface which is brought into engagement with the upper toggle link when the movable contact arm is being tripped open and a second stop surface which is brought into engagement with the upper toggle link at a position closer to the knee pin than to the first stop surface when the movable contact arm is bouncing back. Thus, the toggle link is engaged by two stop surfaces at two stages, enabling the preventing of the bouncing of the movable contact arm.Type: GrantFiled: September 4, 1987Date of Patent: November 22, 1988Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tsukasa Iio, Yoshinori Mochizuki, Hiroshi Fujii, Yasusi Genba, Hideaki Moriwaki
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Patent number: 4771140Abstract: A circuit interrupter comprising a stationary contact assembly having a stationary contact element securely attached to a stationary conductor, and a movable contact assembly having a movable contact element secured on a movable contact arm and operable in response to an overcurrent between ON and OFF positions relative to the stationary contact assembly. An arc runner is attached to the stationary conductor by a single rivet and includes an elongated main body extending along the stationary conductor for expanding an electric arc generated between the movable and the stationary contact elements upon current interruption. The circuit interrupter further comprises a pair of tabs mounted to the arc runner for defining a pair of sloped engagement surfaces for receiving and positioning therebetween the stationary conductor when the stationary contact assembly is assembled.Type: GrantFiled: September 9, 1987Date of Patent: September 13, 1988Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Fujii, Tsukasa Iio, Yasusi Genba, Hideaki Moriwaki, Yoshinori Mochizuki
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Patent number: 4716265Abstract: To prevent a separation arc from migrating along the movable contact arm 12 of a circuit breaker and welding its biasing spring 14, the arm is protected by an insulating shield 22 underlying its lower face, flanking its sides, and having outwardly extending tabs 22c underlying the spring halves.Type: GrantFiled: June 15, 1987Date of Patent: December 29, 1987Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Fujii, Tsukasa Iio, Yasusi Genba, Hideaki Moriwaki, Yoshinori Mochizuki
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Patent number: D347623Type: GrantFiled: January 3, 1992Date of Patent: June 7, 1994Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masakatsu Suzuki, Fumiyuki Hisatsune, Takayoshi Ishikawa, Tsukasa Iio, Yasushi Genba, Kouhei Fujiwara, Shinsaku Yamasaki, Hiroshi Okashita