Patents Assigned to Iwaki Co., Ltd.
  • Patent number: 10941868
    Abstract: This valve seat is disposed below a valve ball, wherein the valve seat comprises an annular member in which a seating surface and a lower end surface of the valve ball are formed into a circular shape; a flow path is formed between the seating surface and the lower end surface, for communicating a transfer fluid including a gas and a liquid; and the flow path is formed in a predetermined shape in which a horizontal distance from the central axis which crosses the lower end surface at right angle to the inner circumferential surface of the flow path excluding the seating surface and the lower end surface is not constant over the entire circumference of the flow path.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: March 9, 2021
    Assignee: IWAKI CO., LTD.
    Inventor: Yoshio Ogawa
  • Patent number: 10890190
    Abstract: 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: Grant
    Filed: December 27, 2013
    Date of Patent: January 12, 2021
    Assignee: IWAKI CO., LTD.
    Inventors: Hiroyuki Kawai, Katsumi Kawaguchi, Toshinori Yanagihara
  • Publication number: 20200277947
    Abstract: A tubephragm pump includes a tubephragm that has a pump head portion that forms a pump chamber, a driving head that holds the tubephragm and expands and contracts the pump chamber by directly pressing and pulling the pump head portion in a direction intersecting with a transfer direction of a transfer fluid, a driving unit that drives the driving head back and forth in a driving direction to expand and contract the pump chamber, and a control unit that controls the driving unit. The tubephragm is in a flat shape with a cross-sectional shape intersecting with the transfer direction of the transfer fluid of the pump chamber having a length in a direction intersecting with the driving direction longer than a length in the driving direction. A pair of liquid contacting surfaces opposing in the driving direction of the pump chamber move while maintaining a parallel state.
    Type: Application
    Filed: February 4, 2020
    Publication date: September 3, 2020
    Applicant: IWAKI CO., LTD.
    Inventors: Shigeyoshi MATSUO, Hiroyuki TANABE, Motohiro TANAKA
  • Patent number: 10711779
    Abstract: A plunger pump includes a cylinder section having a cylinder chamber and a spacer section sliding against a portion of the plunger closer to a proximal end side than a portion of a plunger advancing and retracting into the cylinder chamber. The cylinder section is made of a material having first hardness, and the spacer section being made of a resin material having second hardness softer than the first hardness. A length in an axial direction from a proximal end of a sliding portion of the spacer section sliding against the plunger to a distal end of the spacer section is larger than a maximum stroke length of reciprocation of the plunger.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: July 14, 2020
    Assignee: IWAKI CO., LTD.
    Inventor: Mikio Mizukoshi
  • Patent number: 10704547
    Abstract: A volume pump transfers a transfer fluid by expanding and contracting a bellows, and includes: the bellows that is capable of expanding and contracting, and has a bottomed cylindrical shape forming a pump chamber on its inside; a suction valve provided on a suction side of the pump chamber to guide the transfer fluid into the pump chamber; and a discharge valve provided on a discharge side of the pump chamber to discharge the transfer fluid from the pump chamber. The suction valve and the discharge valve each include a valve seat and a valve body. The valve body is configured from a flexible material and has: a fixed section whose positional relationship with the valve seat is fixed; and a valve section that extends in a certain direction between a direction directed from the fixed section to the valve seat and a direction that the transfer fluid moves.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: July 7, 2020
    Assignee: IWAKI CO., LTD.
    Inventor: Toshiki Oniduka
  • Publication number: 20200102948
    Abstract: A reciprocating pump includes: a pump head having an inner space; a diaphragm configured to partition the inner space of the pump head into a pump chamber into which a transfer fluid is to be introduced and a working chamber into which working air is to be introduced; a driving device including a reciprocating member coupled to the diaphragm, the driving device being capable of driving the reciprocating member with the working air at least in a direction that the diaphragm is retracted; and a working air switching device.
    Type: Application
    Filed: January 28, 2019
    Publication date: April 2, 2020
    Applicant: IWAKI CO., LTD.
    Inventors: Shigeyoshi MATSUO, Hiroyuki TANABE, Motohiro TANAKA
  • Patent number: 10550835
    Abstract: A duplex reciprocating pump includes: a case member forming a pair of spaces; a movable partitioning member that partitions insides of these spaces into a first and second pump chamber and a first and second actuation chamber; a first switch valve mechanism provided with a first valve mechanism that switches supply of an actuation fluid to the first actuation chamber; a second switch valve mechanism provided with a second valve mechanism that switches supply of the actuation fluid to the second actuation chamber; a first switching mechanism that switches supply to the first switch valve mechanism of a control fluid; and a second switching mechanism that switches supply to the second switch valve mechanism of the control fluid, the first and second switching mechanisms switching supply so as to have an overlap period in which compression steps of the first and second pump chambers partially overlap.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: February 4, 2020
    Assignee: IWAKI CO., LTD.
    Inventor: Toshiki Oniduka
  • Publication number: 20190203706
    Abstract: The pump device includes: a pump body which transfers a transfer fluid; a drive unit which drives the pump body; an operating unit which sets an operation of the drive unit; and a joint mechanism which attaches the operating unit to the drive unit. The drive unit includes a casing. The operating unit includes a user-accessible operating surface. The joint mechanism is attached to a wall surface of the casing so as to be rotationally operable about a first axis perpendicular to the wall surface and supports the operating unit such that the operating surface crosses a second axis perpendicular to the first axis and follows along an outer surface of the casing.
    Type: Application
    Filed: September 28, 2016
    Publication date: July 4, 2019
    Applicant: IWAKI CO., LTD.
    Inventors: Yuichi MATSUMOTO, Toshiaki HADA
  • Publication number: 20190101107
    Abstract: Plunger pump includes cylinder having inside cylinder chamber; plunger disposed in cylinder to be relatively movable forward and backward to cylinder chamber so outer plunger's circumferential face is in slide contact with cylinder's inner circumferential face, and having cut face on distal end's outer periphery; and suction and discharge ports provided to cylinder to communicate with cylinder chamber, plunger pump transferring fluid by reciprocating plunger in axial direction while rotating plunger relative to cylinder chamber to let suction and discharges ports alternately communicate with cylinder chamber, wherein cylinder includes cylinder main body and spacer section being disposed in cylinder main body's inner portion of proximal end side, and sliding against plunger's portion closer to proximal end side than portion of plunger advancing and retracting into cylinder chamber, and plunger pump further includes seal section provided on cylinder's proximal end side for sealing cylinder main body, plunger an
    Type: Application
    Filed: January 12, 2018
    Publication date: April 4, 2019
    Applicant: IWAKI CO., LTD.
    Inventor: Mikio MIZUKOSHI
  • Publication number: 20180073496
    Abstract: A duplex reciprocating pump includes: a case member forming a pair of spaces; a movable partitioning member that partitions insides of these spaces into a first and second pump chamber and a first and second actuation chamber; a first switch valve mechanism provided with a first valve mechanism that switches supply of an actuation fluid to the first actuation chamber; a second switch valve mechanism provided with a second valve mechanism that switches supply of the actuation fluid to the second actuation chamber; a first switching mechanism that switches supply to the first switch valve mechanism of a control fluid; and a second switching mechanism that switches supply to the second switch valve mechanism of the control fluid, the first and second switching mechanisms switching supply so as to have an overlap period in which compression steps of the first and second pump chambers partially overlap.
    Type: Application
    Filed: March 31, 2016
    Publication date: March 15, 2018
    Applicant: IWAKI CO., LTD.
    Inventor: Toshiki ONIDUKA
  • Publication number: 20180051692
    Abstract: A volume pump transfers a transfer fluid by expanding and contracting a bellows, and includes: the bellows that is capable of expanding and contracting, and has a bottomed cylindrical shape forming a pump chamber on its inside; a suction valve provided on a suction side of the pump chamber to guide the transfer fluid into the pump chamber; and a discharge valve provided on a discharge side of the pump chamber to discharge the transfer fluid from the pump chamber. The suction valve and the discharge valve each include a valve seat and a valve body. The valve body is configured from a flexible material and has: a fixed section whose positional relationship with the valve seat is fixed; and a valve section that extends in a certain direction between a direction directed from the fixed section to the valve seat and a direction that the transfer fluid moves.
    Type: Application
    Filed: March 10, 2015
    Publication date: February 22, 2018
    Applicant: IWAKI CO., LTD.
    Inventor: Toshiki ONIDUKA
  • Publication number: 20170218950
    Abstract: A plunger pump includes a cylinder section having a cylinder chamber and a spacer section sliding against a portion of the plunger closer to a proximal end side than a portion of a plunger advancing and retracting into the cylinder chamber. The cylinder section is made of a material having first hardness, and the spacer section being made of a resin material having second hardness softer than the first hardness. A length in an axial direction from a proximal end of a sliding portion of the spacer section sliding against the plunger to a distal end of the spacer section is larger than a maximum stroke length of reciprocation of the plunger.
    Type: Application
    Filed: January 24, 2017
    Publication date: August 3, 2017
    Applicant: IWAKI CO., LTD.
    Inventor: Mikio MIZUKOSHI
  • Publication number: 20160341201
    Abstract: 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: Application
    Filed: December 27, 2013
    Publication date: November 24, 2016
    Applicant: IWAKI CO., LTD.
    Inventors: Hiroyuki KAWAI, Katsumi KAWAGUCHI, Toshinori YANAGIHARA
  • Patent number: 9239047
    Abstract: 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: Grant
    Filed: March 8, 2012
    Date of Patent: January 19, 2016
    Assignee: IWAKI CO., LTD.
    Inventors: Kyouhei Iwabuchi, Hiroyuki Tanabe, Toshiki Oniduka, Atsushi Yoshida
  • Publication number: 20140010689
    Abstract: 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: Application
    Filed: March 8, 2012
    Publication date: January 9, 2014
    Applicant: IWAKI CO., LTD.
    Inventors: Kyouhei Iwabuchi, Hiroyuki Tanabe, Toshiki Oniduka, Atsushi Yoshida
  • Patent number: 8288906
    Abstract: 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: Grant
    Filed: January 29, 2008
    Date of Patent: October 16, 2012
    Assignee: Iwaki Co., Ltd.
    Inventor: Hiroyuki Onuma
  • Patent number: 7977838
    Abstract: 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: Grant
    Filed: October 21, 2008
    Date of Patent: July 12, 2011
    Assignee: Iwaki Co., Ltd.
    Inventor: Hiroyuki Onuma
  • Publication number: 20110091340
    Abstract: 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: Application
    Filed: October 8, 2010
    Publication date: April 21, 2011
    Applicant: IWAKI CO., LTD.
    Inventor: Keizo SUNAGAWA
  • Patent number: 7800269
    Abstract: 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: Grant
    Filed: June 12, 2009
    Date of Patent: September 21, 2010
    Assignee: Iwaki Co., Ltd.
    Inventors: Hiroyuki Onuma, Toru Masuzawa, Yohji Okada
  • Publication number: 20100172775
    Abstract: 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: Application
    Filed: January 29, 2008
    Publication date: July 8, 2010
    Applicant: IWAKI CO., LTD.
    Inventor: Hiroyuki Onuma