Patents by Inventor Hiroshi Ohya
Hiroshi Ohya 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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Publication number: 20240079982Abstract: A power converter apparatus comprising: a power converter that outputs signal to the magnet motor to vary the output frequency, output voltage and output current of the magnet motor, a control unit controls the power converter, wherein the control unit calculating the gain of the magnetic flux component of the q-axis, which varies with the phase of the magnet motor, calculating the d-axis induced voltage command value based on a value of the induced voltage coefficient, frequency estimates or frequency command value, and the gain of the flux component of the q-axis.Type: ApplicationFiled: November 10, 2021Publication date: March 7, 2024Inventors: Kazuaki TOBARI, Hironori OHASHI, Hiroshi WATANABE, Masato OHYA
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Patent number: 7118136Abstract: A sleeve-type pipe joint 10 has a joint body 11 having a cylindrical projection 12 adapted to be inserted into a pipe 40 to be connected; a ring member 20 having a larger inner diameter than an outer diameter of the pipe 40; and a resiliently deformable, cylindrical sleeve member 30 moved into a space between the ring member 20 and the pipe 40, at least one of an inner surface of the ring member 20 and an outer surface of the sleeve member 30 being provided with a tapered portion, such that when the sleeve member 30 is moved into the ring member 20, the sleeve member 30 is deformed inward, resulting in tight connection of the inner surface of the pipe 40 to the outer surface of the cylindrical projection 12. When the ring member 20, the sleeve member 30, and the joint body 11 are assembled, the ring member 20 and the sleeve member 30 resist detachment from the assembled pipe joint 10.Type: GrantFiled: April 22, 2004Date of Patent: October 10, 2006Assignee: Hitachi Metals, Ltd.Inventor: Hiroshi Ohya
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Publication number: 20040195831Abstract: A sleeve-type pipe joint 10 comprising a joint body 11 having a cylindrical projection 12 adapted to be inserted into a pipe 40 to be connected; a ring member 20 having a larger inner diameter than an outer diameter of the pipe 40; and a resiliently deformable, cylindrical sleeve member 30 moved into a space between the ring member 20 and the pipe 40, at least one of an inner surface of the ring member 20 and an outer surface of the sleeve member 30 being provided with a tapered portion, such that when the sleeve member 30 is moved into the ring member 20, the sleeve member 30 is deformed inward, resulting in tight connection of the inner surface of the pipe 40 to the outer surface of the cylindrical projection 12. When the ring member 20, the sleeve member 30, and the joint body 11 are assembled, the ring member 20 and the sleeve member 30 resist detachment from the assembled pipe joint 10.Type: ApplicationFiled: April 22, 2004Publication date: October 7, 2004Applicant: HITACHI METALS LTD.Inventor: Hiroshi Ohya
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Patent number: 6749233Abstract: A sleeve-type pipe joint 10 has a joint body 11 having a cylindrical projection 12 adapted to be inserted into a pipe 40 to be connected; a ring member 20 having a larger inner diameter than an outer diameter of the pipe 40; and a resiliently deformable, cylindrical sleeve member 30 moved into a space between the ring member 20 and the pipe 40, at least one of an inner surface of the ring member 20 and an outer surface of the sleeve member 30 being provided with a tapered portion, such that when the sleeve member 30 is moved into the ring member 20, the sleeve member 30 is deformed inward, resulting in tight connection of the inner surface of the pipe 40 to the outer surface of the cylindrical projection 12. When the ring member 20, the sleeve member 30, and the joint body 11 are assembled, the ring member 20 and the sleeve member 30 resist detachment from the assembled pipe joint 10.Type: GrantFiled: June 8, 2001Date of Patent: June 15, 2004Assignee: Hitachi Metals, Ltd.Inventor: Hiroshi Ohya
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Publication number: 20020000721Abstract: A sleeve-type pipe joint 10 comprising a joint body 11 having a cylindrical projection 12 adapted to be inserted into a pipe 40 to be connected; a ring member 20 having a larger inner diameter than an outer diameter of the pipe 40; and a resiliently deformable, cylindrical sleeve member 30 pressed into a space between the ring member 20 and the pipe 40, at least one of an inner surface of the ring member 20 and an outer surface of the sleeve member 30 being provided with a tapered portion, such that when the sleeve member 30 is pressed into the ring member 20, the sleeve member 30 is deformed inward, resulting in tight connection of the inner surface of the pipe 40 to the outer surface of the cylindrical projection 12. When the ring member 20 and the sleeve member 30 are assembled to the joint body 11, the ring member 20 and the sleeve member 30 are locked to the joint body 11.Type: ApplicationFiled: June 8, 2001Publication date: January 3, 2002Applicant: HITACHI METALS, LTD.Inventor: Hiroshi Ohya
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Patent number: 5817829Abstract: The present invention provides a plant disease control agent containing as active ingredient one or more compounds of the formula ?1!A--COOR.sup.1 ?1!whereinR.sup.1 represents a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group, andA represents a group of the formula (A-1) or (A-2) ##STR1## R.sup.2 represents a C.sub.1 -C.sub.4 alkyl group, R.sup.3 represents a C.sub.1 -C.sub.4 alkyl group,R.sup.4 represents a halogen atom or a C.sub.1 -C.sub.4 alkyl group, andR.sup.5 represents a C.sub.1 -C.sub.4 alkyl group.Further, the compound of A-1 in the formula ?1! in which R.sup.3 is a halogen atom is also included in the present invention.Type: GrantFiled: October 23, 1996Date of Patent: October 6, 1998Assignee: Nissan Chemical Industries, Ltd.Inventors: Shigeaki Akiyama, Toshiaki Takeyama, Junichi Watanabe, Yasuyuki Nakajima, Hiroyuki Suzuki, Yoshiaki Yasumi, Takamasa Kikuchi, Hiroshi Ohya, Shigeru Sasabe, Masanori Nishioka, Takashi Furusato
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Patent number: 5741814Abstract: Cyclooctadiene derivative of the following formula (1): ##STR1## wherein A.sup.1, A.sup.2, A.sup.3 and A.sup.4 each independently represent COOR.sup.5 (where R.sup.5 represents a hydrogen atom, a C.sub.1 -C.sub.10 alkyl group, a phenyl group, a C.sub.7 -C.sub.12 aralkyl group or CONR.sup.6 R.sup.7 (where R.sup.6 and R.sup.7 each independently represent a hydrogen atom, a C.sub.1 -C.sub.10 alkyl group or a phenyl group), or A.sup.1 and A.sup.2, and/or A.sup.3 and A.sup.4 may be combined together to represent group(s) of: ##STR2## in which X represents an oxygen atom or NR.sup.8 {where R.sup.8 represents a hydrogen atom, a C.sub.1 -C.sub.10 alkyl group or a phenyl group),R.sup.0, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group and an C.sub.1 -C.sub.10 alkyl group,the symbol ------ represents a single or double bond, and when it is a double bond, then R.sup.1 and R.sup.Type: GrantFiled: September 3, 1996Date of Patent: April 21, 1998Assignee: Nissan Chemical Industries, Ltd.Inventors: Yasuyuki Nakajima, Hisayuki Watanabe, Michiaki Adachi, Michito Tagawa, Mitsugu Futagawa, Takashi Furusato, Hiroshi Ohya, Masanori Nishioka
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Patent number: 5347819Abstract: Method and apparatus for manufacturing superfluidity helium (He II). The method includes the steps of (a) providing .sup.3 He gas (b) providing liquid .sup.4 He, (c) compressing the .sup.3 He gas to produce compressed .sup.3 He gas, (d) indirectly cooling the compressed .sup.3 He gas with liquid .sup.4 He to produce cryogenic .sup.3 He gas (e) adiabatically expanding the cryogenic .sup.3 He gas to produce cryogenic .sup.3 He gas having a temperature of less than about 1.18.degree. K., preferably less than 1.8.degree. K., and (f) indirectly cooling the liquid .sup.4 He with the cryogenic .sup.3 He gas produced in step (e) to produce superfluidity helium. The apparatus includes a first container for liquid helium and a second container for containing superfluidity helium, and a first line for connecting the first and second containers. A .sup.3 He refrigeration circuit is provided to cool the .sup.4 He in directly with cryogenic .sup.3 He to produce superfluidity helium.Type: GrantFiled: October 27, 1993Date of Patent: September 20, 1994Assignee: Ishikawajima-Harima Heavy Industries, Co., Ltd.Inventors: Nobuyoshi Saji, Hiroshi Ohya, Hiroshi Asakura, Shunji Nagai
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Patent number: 5150923Abstract: A plastic socket pipe joint comprising a cylindrical plastic socket pipe joint body, an electric heating wire buried in the cylindrical inner surface of the plastic socket pipe joint body, and two connector pins embedded in the plastic socket pipe joint body. The lower ends of the connector pins are connected to both ends of the electric heating wire and the upper ends thereof protrude from the cylindrical outer surface of the plastic socket pipe joint body. Two recesses are formed in the plastic socket pipe joint body near the connector pins for receiving respective thermocouples. The plastic pipe joint is welded to a plastic pipe by applying current to the electric wire. The temperature of the plastic pipe joint is measured with the thermocouples so that when the temperature drops to a predetermined value, the application of current is suspended.Type: GrantFiled: January 22, 1990Date of Patent: September 29, 1992Assignee: Hitach Metals, Ltd.Inventors: Hiroshi Ohya, Takeshi Kato
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Patent number: 4700376Abstract: An automatic telephone answering apparatus includes tape recorder sections for outputting a speech message through a telephone line, and for recording and reproducing a speech signal through the telephone line, a controller for setting the tape recorder sections in predetermined modes, and a decoder for decoding a remote control signal received through the telephone line and supplying a decoded remote control signal to the controller. A muting circuit between a telephone line interface and the tape recorder sections blocks remote control signals from being recorded, in response to a timing signal generated by a DTMF receiver in the decoder.Type: GrantFiled: January 22, 1985Date of Patent: October 13, 1987Assignee: Olympus Optical Co., Ltd.Inventors: Hiroshi Ohya, Nobuo Terui
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Patent number: 4322758Abstract: This invention pertains to a fluorescent indicator adapted to indicate a level of a signal to be measured in an acoustic instrument and/or a vertical condition of a magnetic head in a multi-channel tape recorder.The fluorescent indicator comprises a fluorescent indicating tube having a plurality of segment anodes arranged in a row from a lowest level side to a highest level side, pulse generator means to generate clock pulses having the number of pulses corresponding to the level of a signal, and counter means including a plurality of output terminals connected to the respective segment anodes to have output signal sequentially generated corresponding to the count of the clock pulses to operate the segment anodes of the fluorescent indicating tube.Type: GrantFiled: May 1, 1980Date of Patent: March 30, 1982Assignee: Nakamichi CorporationInventors: Hiroshi Ohya, Kozo Kobayashi