Patents Assigned to Iwaki Co., Ltd.
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Publication number: 20160341201Abstract: A magnetic pump includes a front casing including: a shaft supporting body that supports a leading end of a supporting shaft; and a plurality of supporting legs that extends toward an inner wall of a suction port from the shaft supporting body, and that supports the shaft supporting body in the suction port. In the magnetic pump, a leading end of the shaft supporting body is positioned further toward the inlet side of the suction port than a connecting section between the inner wall of the suction port and the supporting leg.Type: ApplicationFiled: December 27, 2013Publication date: November 24, 2016Applicant: IWAKI CO., LTD.Inventors: Hiroyuki KAWAI, Katsumi KAWAGUCHI, Toshinori YANAGIHARA
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Patent number: 9239047Abstract: A bellows pump with a case member that forms an axial space therein, closed-bottomed cylindrical bellows that are arranged in the space in an axially extendable/contractable manner and axially separate the space into a pump chamber and an operation chamber, suction valves that are provided on a suction side of the pump chamber and guide a fluid to be transferred to the pump chamber, and discharge valves that are provided on a discharge side of the pump chamber and discharge the fluid to be transferred from the pump chamber, and which extends/contracts the bellows by introducing a working fluid into the operation chamber to discharge the working fluid from the operation chamber, wherein each of the bellows is configured by alternately forming mountain portions and valley portions along the axial direction and having, on a predetermined position in the axial direction, annular ring portion integrally formed therewith.Type: GrantFiled: March 8, 2012Date of Patent: January 19, 2016Assignee: IWAKI CO., LTD.Inventors: Kyouhei Iwabuchi, Hiroyuki Tanabe, Toshiki Oniduka, Atsushi Yoshida
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Publication number: 20140010689Abstract: A bellows pump which is provided with a case member that forms an axial space therein, closed-bottomed cylindrical bellows that are arranged in the space in an axially extendable/contractable manner and axially separate the space into a pump chamber and an operation chamber, suction valves that are provided on a suction side of the pump chamber and guide a fluid to be transferred to the pump chamber, and discharge valves that are provided on a discharge side of the pump chamber and discharge the fluid to be transferred from the pump chamber, and which extends/contracts the bellows by introducing a working fluid into the operation chamber to discharge the working fluid from the operation chamber, wherein each of the bellows is configured by alternately forming mountain portions and valley portions along the axial direction and having, on a predetermined position in the axial direction, annular ring portion integrally formed therewith.Type: ApplicationFiled: March 8, 2012Publication date: January 9, 2014Applicant: IWAKI CO., LTD.Inventors: Kyouhei Iwabuchi, Hiroyuki Tanabe, Toshiki Oniduka, Atsushi Yoshida
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Patent number: 8288906Abstract: A maglev motor and a pump using the maglev motor can be provided with strong magnetic bearing force generated by a simple structure, rotation losses of a rotor reduced with the generation of an eddy current suppressed, and a configuration of magnetic bearing can downsize by using a thin rotor.Type: GrantFiled: January 29, 2008Date of Patent: October 16, 2012Assignee: Iwaki Co., Ltd.Inventor: Hiroyuki Onuma
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Patent number: 7977838Abstract: A magnetic levitation motor including a stator having magnetic bearing units and a motor unit, and a rotor provided to the stator. And the occurrence of an eddy current at a magnetic bearing is suppressed and the rotation loss of the rotor can be reduced, and also to provide a pump using such the magnetic levitation motor.Type: GrantFiled: October 21, 2008Date of Patent: July 12, 2011Assignee: Iwaki Co., Ltd.Inventor: Hiroyuki Onuma
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Publication number: 20110091340Abstract: A reciprocating pump introduces a liquid into a pump chamber through a suction valve and discharges the liquid from the pump chamber through a discharge valve by reciprocating movement of a reciprocating member facing the pump chamber. The suction valve and the discharge valve include: a body portion having therein a flow path for a liquid; a valve seat portion provided at an entrance side of the flow path of the body portion and having therein a hole through which the liquid flows; a valving element provided in the body portion and able to open and close the hole of the valve seat portion; and a spring provided in the body portion for pressing the valving element into the hole of the valve seat portion. The spring has projections which are formed on an outer circumferential portion of its surface to project toward the inner wall of the body portion.Type: ApplicationFiled: October 8, 2010Publication date: April 21, 2011Applicant: IWAKI CO., LTD.Inventor: Keizo SUNAGAWA
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Patent number: 7800269Abstract: In a hybrid magnetic bearing, the electromagnet has a core wound with a control coil and has a main pole and a commutating pole with a commutating pole permanent magnet provided approximately parallel to each other at predetermined intervals in a protruding condition radially or axially to the rotor. In the magnetic bearing provided radially, two electromagnets are placed oppositely to each other across the rotor in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. In the magnetic bearing provided axially, two electromagnets are placed in parallel in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets.Type: GrantFiled: June 12, 2009Date of Patent: September 21, 2010Assignee: Iwaki Co., Ltd.Inventors: Hiroyuki Onuma, Toru Masuzawa, Yohji Okada
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Publication number: 20100172775Abstract: A maglev motor and a pump using the maglev motor can be provided with strong magnetic bearing force generated by a simple structure, rotation losses of a rotor reduced with the generation of an eddy current suppressed, and a configuration of magnetic bearing can downsize by using a thin rotor.Type: ApplicationFiled: January 29, 2008Publication date: July 8, 2010Applicant: IWAKI CO., LTD.Inventor: Hiroyuki Onuma
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Patent number: 7683514Abstract: In a hybrid magnetic bearing, the electromagnet has a core wound with a control coil and has a main pole and a commutating pole with a commutating pole permanent magnet provided approximately parallel to each other at predetermined intervals in a protruding condition radially or axially to the rotor. In the magnetic bearing provided radially, two electromagnets are placed oppositely to each other across the rotor in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. In the magnetic bearing provided axially, two electromagnets are placed in parallel in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets.Type: GrantFiled: August 30, 2006Date of Patent: March 23, 2010Assignee: Iwaki Co., LtdInventors: Hiroyuki Onuma, Toru Masuzawa, Yohji Okada
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Publication number: 20090315421Abstract: In a hybrid magnetic bearing, the electromagnet has a core wound with a control coil and has a main pole and a commutating pole with a commutating pole permanent magnet provided approximately parallel to each other at predetermined intervals in a protruding condition radially or axially to the rotor. In the magnetic bearing provided radially, two electromagnets are placed oppositely to each other across the rotor in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. In the magnetic bearing provided axially, two electromagnets are placed in parallel in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets.Type: ApplicationFiled: June 12, 2009Publication date: December 24, 2009Applicant: IWAKI CO., LTD.Inventors: Hiroyuki ONUMA, Toru MASUZAWA, Yohji OKADA
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Publication number: 20090121571Abstract: A magnetic levitation motor including a stator having magnetic bearing units and a motor unit, and a rotor provided to the stator. And the occurrence of an eddy current at a magnetic bearing is suppressed and the rotation loss of the rotor can be reduced, and also to provide a pump using such the magnetic levitation motor.Type: ApplicationFiled: October 21, 2008Publication date: May 14, 2009Applicant: IWAKI CO., LTD.Inventor: Hiroyuki Onuma
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Publication number: 20090079284Abstract: In a hybrid magnetic bearing, the electromagnet has a core wound with a control coil and has a main pole and a commutating pole with a commutating pole permanent magnet provided approximately parallel to each other at predetermined intervals in a protruding condition radially or axially to the rotor. In the magnetic bearing provided radially, two electromagnets are placed oppositely to each other across the rotor in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. In the magnetic bearing provided axially, two electromagnets are placed in parallel in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets.Type: ApplicationFiled: August 30, 2006Publication date: March 26, 2009Applicant: IWAKI CO., LTD.Inventors: Hiroyuki Onuma, Toru Masuzawa, Yohji Okada
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Patent number: 7249939Abstract: It is sought to provide a rear casing arrangement for a magnetic drive pump, which can sufficiently provide such functions pressure resistance and heat resistance, which give rise to problems in the case of manufacturing the rear casing from a material based on a synthetic resin, and can also be manufactured at low cost. A reinforcing belt-like ring member is woundly fitted on the outer periphery of a cylindrical barrel part of an inner casing member constituting a rear casing. The belt-like ring member has a width smaller than the length of the barrel part. A casing cover member is fitted on the belt-like ring member in the above fitted state. Alternatively, it is possible to fit the belt-like ring member on the outer periphery of a barrel part of the casing cover member. These parts can be disassembled.Type: GrantFiled: December 16, 2003Date of Patent: July 31, 2007Assignee: Iwaki Co., Ltd.Inventors: Toshinori Yanagihara, Koichi Kojima, Yoshihiro Iba
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Patent number: 6966339Abstract: A spool valve arrangement with a cylinder is fitted with a clearance fit in a cylinder bore in a housing of the spool valve arrangement. The housing has first pressure medium ports and the cylinder has second pressure medium ports. A socket is inserted through each first pressure medium port in the housing and each second pressure medium port in the cylinder. The socket has a small diameter part, which is fitted with a clearance fit in the second pressure medium port, and a large diameter part, which is engaged with a shoulder formed in the first pressure medium port. By screwing a conduit end in the first pressure medium port, the socket is held in the mounted position, thus providing a seal of the region of this port and also providing an anti-rotation effect on the cylinder relative to the housing.Type: GrantFiled: October 15, 2003Date of Patent: November 22, 2005Assignee: Iwaki Co., Ltd.Inventors: Toshiki Oniduka, Tsuyoshi Watanabe, Tsutomu Sawada
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Publication number: 20050191195Abstract: It is sought to provide a dual reciprocating bellows pump having two, i.e., left and right, bellows interlocked by interlock shafts to each other, which is free of wear powder or wear dust generated by the frictional movement of the interlock shafts and bearings relative to one another from pump feed fluid in pumping chambers, permits ready use of synthetic resin as pump element material, is excellent in function and cost and readily permits size reduction design. Paired interlock shafts coupled to end members 6 of the pair of, i.e., left and right, bellows, are disposed in paired working air chambers 8, and are movably inserted in through bores provided in a pump head. Between each interlock shaft and each through elastic seal members are disposed, thus sealing the left and right working air chambers 8 from each other. No particular bearing is used for the interlock shafts. Lip seals are desirably used as the elastic seal members.Type: ApplicationFiled: January 27, 2005Publication date: September 1, 2005Applicant: Iwaki Co., Ltd.Inventors: Toshiki Oniduka, Tsuyoshi Watanabe, Tsutomu Sawada
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Patent number: 6874997Abstract: There is provided a pump system excellent in a maintenance ability and compatibility. The pump system comprises a pump (1) for transferring a liquid by alternately supplying air to air chambers (17a, 17b) to extend and contract a pair of bellows (13a, 13b) linked to a shaft (15). It also comprises a switching valve mechanism (2) for switching the air supplied to the pump (1). Switching mechanisms (40a, 40b) are employed to switch the pilot air for controlling the switching operation of the switching valve mechanism (2). The switching mechanisms are detachably attached to cases (16a, 16b) of the pump (1) from outside.Type: GrantFiled: November 8, 2002Date of Patent: April 5, 2005Assignee: Iwaki Co., Ltd.Inventors: Tsuyoshi Watanabe, Masao Morishita, Tsutomu Sawada, Toshiki Oniduka
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Patent number: 6843645Abstract: A magnet pump includes a synthetic resin casing, divided into a front casing and a rear casing and configured to internally form an impeller housing chamber and a magnet can housing chamber contiguous thereto, having an inlet and an outlet for a target fluid to be transferred. The casing forms an eddy chamber at a position for dividing the front casing and the rear casing along the outer rim of the impeller housing chamber to surround the outer rim of the impeller. The eddy chamber has overhangs formed at an entry of the eddy chamber hanging over from both sides in the rotational-axis direction of the impeller.Type: GrantFiled: June 5, 2001Date of Patent: January 18, 2005Assignee: Iwaki Co., Ltd.Inventors: Keiichi Terada, Toshihiko Kondo, Yasumasa Kurihara, Koichi Kato, Takahiro Kinoshita
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Publication number: 20040265149Abstract: It is sought to provide a small-size and highly safe bellows pump dealing with an explosive gas or the like as pump feed fluid, which can prevent hazards due to reaching of a drive motor or like drive part by the pump feed fluid caused to leak out when the bellows is broken. A flexible partition membrane is stretched between the movable end of the bellows and the pump housing to make the outside-bellows region to be a sealed chamber. The flexible partition membrane can follow the reciprocation of the bellows and does not interfere with the operation thereof. When the pump feed fluid leaks out from the pump chamber due to breakage of the bellows during operation thereof, it is retained in the sealed outside-bellows region, and does not reach the drive part including the drive motor. Also, the flexible partition membrane prevents dust intrusion to the bellows side, thus preventing such troubles as the breakage of the bellows otherwise stemming from the dust intrusion.Type: ApplicationFiled: June 30, 2004Publication date: December 30, 2004Applicant: Iwaki Co., Ltd.Inventors: Tetsuya Harigaya, Koichi Kakihara
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Patent number: 6814553Abstract: The present invention is to provide a dual reciprocating bellows pump which can facilitate size reduction design of the whole pump, permit pump manufacture at low cost, and permit reducing the dead spaces in pumping chambers to provide improved self-suction performance. Valve cases of suction side and discharge side valve units are disposed one below the other along a longitudinal axis passing through the center of the cross-section of the bellows such that they project into the associated pumping chambers, and a pair of interlock shafts are disposed at positions spaced apart to the left and right from the center in the transversal direction. With this construction, it is possible to reduce the dead spaces in the pumping chambers, reduce the longitudinal and transversal dimensions of the pump and facilitate size reduction design of the pump.Type: GrantFiled: December 30, 2002Date of Patent: November 9, 2004Assignee: Iwaki Co. Ltd.Inventors: Tsuyoshi Watanabe, Tsutomu Sawada, Toshiki Oniduka
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Publication number: 20040184936Abstract: It is sought to provide a rear casing arrangement for a magnetic drive pump, which can sufficiently provide such functions pressure resistance and heat resistance, which give rise to problems in the case of manufacturing the rear casing from a material based on a synthetic resin, and can also be manufactured at low cost.Type: ApplicationFiled: December 16, 2003Publication date: September 23, 2004Applicant: IWAKI CO., LTD.Inventors: Toshinori Yanagihara, Koichi Kojima, Yoshihiro Iba