Patents Assigned to EAGLES INDUSTRY CO., LTD.
  • WATER LUBRICATION TYPE BEARING MATERIAL
    Publication number: 20170362526
    Abstract: A water lubrication type bearing material contains 12 wt. % to 25 wt. % of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA resin), 18 wt. % to 33 wt. % of a carbon fiber, and a remainder including a polytetrafluoroethylene (PTFE) resin and/or a modified PTFE resin. The bearing material has excellent wear resistance and sliding characteristics for a water lubrication type bearing.
    Type: Application
    Filed: January 12, 2016
    Publication date: December 21, 2017
    Applicant: EAGLE INDUSTRY CO., LTD.
    Inventor: Takanobu MATSUMOTO
  • Magnetic fluid seal device
    Patent number: 9845889
    Abstract: A cartridge-type magnetic fluid seal device has a flanged sleeve fixed to an external peripheral surface of the radially inside member of two members and which rotates together with the inside member is provided facing a pair of magnetic pole members. A packing is disposed in an annular space formed by the radial inside of a magnetic source and the pair of magnetic pole members. The packing is provided in the annular space so as to slide on an external peripheral surface of the flanged sleeve, and a magnetic fluid seal part, the packing, and the flanged sleeve form a unit.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: December 19, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Shigeki Honda
  • Mechanical seal
    Patent number: 9845888
    Abstract: A mechanical seal has a seal ring and a mating ring that faces and slides against the seal ring and either the seal ring or mating ring is supported via a bellows on the equipment interior side of a seal cover installed on a housing, while the other rotates together with a rotational shaft; and a baffle sleeve with a roughly L-shaped cross-section is fixed on the equipment exterior side of the seal cover to guide quenching liquid to the sliding surfaces of the seal ring and mating ring, where the baffle sleeve is structurally split into a flange part and cylinder part. The mechanical seal allows for preassembly of its seal members on the stationary side, baffle sleeve, damper, and other related parts at a factory, service center, etc., in a reliable and controlled manner, requiring fewer assembly steps during onsite engineering works.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: December 19, 2017
    Assignees: EAGLE INDUSTRY CO., LTD., EAGLEBURGMANN JAPAN CO., LTD.
    Inventors: Yasunari Furukawa, Masakazu Kito
  • Sliding parts
    Patent number: 9845886
    Abstract: Sealing faces of a pair of sliding parts include circulation grooves, each including an inlet section, an outlet section, and a communication section provided in one of the sealing faces. A positive pressure generation mechanism is provided in a part surrounded by the fluid circulation groove and a high pressure fluid side, and a negative pressure generation mechanism is provided on a low pressure fluid side between the plurality of fluid circulation grooves.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: December 19, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Masatoshi Itadani
  • Sliding parts
    Patent number: 9841106
    Abstract: A pair of sliding parts includes a plurality of dimples formed along a circumferential direction with substantially fixed width from a cavitation formation region on an upstream side of each of the dimples to a positive pressure generation region on a downstream side of each of the dimples. An upstream beginning end of the cavitation formation region is formed in a tapered shape from a low pressure fluid side toward a high pressure fluid side, and disposed so as to overlap a positive pressure generation region of the dimple arranged on the upstream side in a radial direction. A low pressure fluid side edge of the positive pressure generation region is formed in a tapered shape from the low pressure fluid side toward the high pressure fluid side and smoothly connected to a low pressure fluid side edge of the cavitation formation region.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: December 12, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Itadani, Yuichiro Tokunaga
  • Mechanical seal
    Patent number: 9841108
    Abstract: An inside-type mechanical seal is mounted between a rotating shaft and a housing, and adapted for preventing leakage of a sealed fluid from an outer circumference of a sliding surface in the direction of an inner circumference thereof, wherein provided are a rotary-side sealing ring mounted on a rotating shaft side, a stationary-side sealing ring mounted on a seal case side, an annular packing for pushing the stationary-side sealing ring toward the rotary-side sealing ring, a holding part on the outer circumferential side being fitted in the seal case, and a seal lip part on the inner circumferential side being in close contact with the stationary-side sealing ring, and wherein provided to the seal case is a ring-shaped projection abutting against a back surface of the packing during assembly of the mechanical seal, and adapted for pushing the packing toward the stationary-side sealing ring.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: December 12, 2017
    Assignees: EAGLE INDUSTRY CO., LTD., EAGLEBURGMANN JAPAN CO., LTD.
    Inventors: Hiroshi Aoike, Takeshi Ikarashi
  • Sliding parts
    Patent number: 9829043
    Abstract: By randomly arranging dimples provided on a sealing face, a sliding characteristic is improved in a wide range of a bearing characteristic number on the sealing face. A pair of sliding parts in which a plurality of dimples is arranged on at least one of sealing faces that relatively slide on each other is characterized in that each of the plurality of dimples is provided independently from the other dimples, and arranged in such a manner that the plurality of dimples having different opening diameters is randomly distributed.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: November 28, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Yuta Negishi, Takeshi Hosoe, Yuuichiro Tokunaga
  • Sliding component
    Patent number: 9829109
    Abstract: Even when a fluid discharge for discharging high-pressure fluid (sealed fluid) to a high-pressure side of a sealing face is provided, the disclosed sliding component prevents precipitation, adhesion and accumulation of a deposition-causing substance through a dehydration condensation reaction between the high-pressure fluid and low-pressure fluid on the sealing face, and also prevents occurrence of cavitation which would otherwise take place in association with a sudden pressure drop due to a discharge of fluid. Disclosed is a pair of sliding components provided, on a high-pressure side of one of relatively sliding sealing faces thereof, with a fluid discharge for discharging fluid to a high-pressure fluid side, wherein a buffer groove for reducing penetration of low-pressure fluid toward the high-pressure fluid side is provided in the sealing face S on a low-pressure side of the fluid discharge.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: November 28, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Itadani, Yuichiro Tokunaga, Kazumasa Sunagawa, Hikaru Katori
  • Magnetic fluid seal
    Patent number: 9816616
    Abstract: A magnetic fluid seal (20) sealing between an apparatus end (14) and a rotating shaft (22) going through the apparatus end, comprising a housing (38) comprising a magnetic flux generating means (28) generating a magnetic flux and a magnetic flux transfer means (24, 26) facing to the rotating shaft with a fine clearance and transferring the magnetic flux, and placed so as to move relatively in a radial direction of the rotating shaft with respect to the apparatus end and a magnetic fluid (44) held in the fine clearance by the magnetic flux generated by the magnetic flux generating means.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: November 14, 2017
    Assignee: Eagle Industries Co., Ltd.
    Inventors: Daiki Sumikawa, Kotaro Oshita
  • SEAL DEVICE
    Publication number: 20170299063
    Abstract: The concentration of a sealed fluid in the vicinity of a sliding face between a stationary-side seal ring and a rotating-side seal ring is prevented without increasing the number of components and without providing a large-scale external circulation device. A seal cavity includes a radial sliding bearing 11, 25 for supporting a rotating shaft 2, and a sealing means 4, 30 on the side opposite to a sealed fluid source of the radial sliding bearing 11, 25 in a rotation axis direction, for sealing a sealed fluid. Fluid introduction holes 20 are provided in the radial sliding bearing 11, 25 for connecting the sealed fluid source side and the vicinity of the sealing means 4, 30 on the high-pressure fluid side.
    Type: Application
    Filed: August 26, 2015
    Publication date: October 19, 2017
    Applicant: EAGLE INDUSTRY CO., LTD.
    Inventor: Masatoshi ITADANI
  • SPOOL VALVE
    Publication number: 20170292632
    Abstract: A valve sleeve 210 includes an input port P10, an output port P21 connected to a channel for output T2, a discharge port P30 and a lead-in port P22 which is disposed to be connected to the channel for output T2. A spool 220 is provided with a second land section 224 that blocks a portion between the spool 220 and the valve sleeve 210 at a position between the output port P21 and the lead-in port P22 when the spool 220 is located in a position for connecting the channel for input T1 and the channel for output T2 and blocking a channel leading from the channel for output T2 to the channel for discharge T3, and when the spool 220 is located in a position for connecting the channel for output T2 and the channel for discharge T3 and blocking a channel leading from the channel for input T1 to the channel for output T2.
    Type: Application
    Filed: September 18, 2015
    Publication date: October 12, 2017
    Applicant: Eagle Industry Co., Ltd.
    Inventors: Eiji OKAMOTO, Satoshi SHIMIZU
  • Sealing device
    Patent number: 9784372
    Abstract: Provided is a sealing device that increases the lubricity of seal surfaces, prevents leakage of sealed fluids, and prevents excessive heat generation and excessive friction at seal surfaces. Said sealing device, which is of the type that seals a fluid trying to leak from the outer periphery of a sealing surface towards the inner periphery thereof, forms at least two dimples in a circumferential direction in each of a plurality of rows arranged in a radial direction on a sealing surface of a stationary-side sealing element or a rotating-side sealing element. Each dimple is tilted by a dimple angle ? between 0° and 90°, exclusive, such that the tip of that dimple in the direction of rotation is tilted toward the inner periphery side. In each of the plurality of rows of dimples, land areas are formed in the circumferential direction between the proximate tips of adjacent dimples.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: October 10, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Tetsuya Iguchi, Kazuhiro Iwashita, Yasuhiro Kuroki
  • Sliding component
    Patent number: 9777840
    Abstract: A sliding component is characterized in that dimples are provided on one sealing face of a pair of sliding parts that mutually slide relative to each other, where the cavitation formation area on the upstream side of each dimple is positioned closer to the low-pressure fluid side and the positive-pressure generation area on the downstream side is positioned closer to the high-pressure fluid side, and the fluid that has been suctioned in the cavitation formation area of each of the above dimples travels in the dimple and is returned to the high-pressure fluid side from the positive-pressure generation area.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: October 3, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Yuichiro Tokunaga
  • Capacity control valve
    Patent number: 9777863
    Abstract: A control valve for discharging a liquid refrigerant in a control chamber at the time of start-up of a variable capacity compressor has a movable a center post for increasing the area of a passage for discharging the liquid refrigerant when discharging the liquid refrigerant.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: October 3, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideki Higashidozono, Keigo Shirafuji, Toshinori Kanzaki
  • Sliding component
    Patent number: 9772037
    Abstract: A sliding component, which achieves both sealing and lubrication by preventing cavitation from occurring in the dynamic-pressure generation mechanism and thereby solving the problem of leakage that will otherwise result from such cavitation, is characterized in that, on a sealing face of one of a pair of sliding parts that slide against each other, extremely shallow grooves constituting a Rayleigh step mechanism are provided in a manner facing the high-pressure fluid side of the sealing face, while deep fluid-introduction grooves for introducing the high-pressure fluid are provided on the upstream side of the extremely shallow grooves in a manner continuing to the high-pressure fluid side.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: September 26, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Itadani, Yuichiro Tokunaga
  • Sliding component
    Patent number: 9765892
    Abstract: A sliding component has a plurality of dimples provided independently in a circumferential direction on one sealing face of a pair of sliding components relatively sliding to each other. A cavitation formation region on an upstream side of each dimple is disposed closer to a low-pressure fluid side and a positive pressure generation region on a downstream side of each dimple is disposed closer to a high-pressure fluid side, and an edge on the low-pressure fluid side of the positive pressure generation region is formed into a tapered shape inclined with respect to the rotating direction of the other sealing face toward the high-pressure fluid side from the low-pressure fluid side and is smoothly connected to an edge on the low-pressure fluid side of the cavitation formation region.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: September 19, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Itadani, Yuichiro Tokunaga
  • Brush seal
    Patent number: 9752448
    Abstract: A brush seal includes a bristle part formed by multiple bristles such that the multiple bristles arranged in a direction of pressure difference between a high-pressure side and a low-pressure side are mutually fixed between a base end and a free end to form planar bristles, wherein these planar bristles are arranged continuously in layers in a circumferential direction to form a circular bristle part. Multiple dynamic-pressure generating grooves that generate dynamic pressure by turning and sliding relative to a rotational part are formed independently in the circumferential direction, on the sliding surface of the bristle part on the free end side, in a manner open to the high-pressure side.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: September 5, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Hideyuki Inoue
  • MAGNETIC FLUID SEALING STRUCTURE FOR HIGH-SPEED ROTATION
    Publication number: 20170248168
    Abstract: A magnetic fluid sealing structure (1) for high-speed rotation for sealing a gap (S) between a shaft member (2) and a housing member (3) disposed around the shaft member (2), which are rotatable, includes: magnetic force generating means (4) which is fixed to the housing member (3) and generates a magnetic force; magnetic pole members (5) disposed on both sides in an axial direction of the magnetic force generating means (4); and a magnetic fluid (7) which is magnetically held between the magnetic pole members (5) and the shaft member (2) by the magnetic force of the magnetic force generating means (4) and seals the gap (S) therebetween, in which the shaft member (2) has a plurality of different material layers concentrically laminated in a radial direction, and an outermost diameter layer (23) of the shaft member (2), which holds the magnetic fluid (7), is made of a magnetic material.
    Type: Application
    Filed: October 23, 2015
    Publication date: August 31, 2017
    Applicants: RAILWAY TECHNICAL RESEARCH INSTITUTE, EAGLE INDUSTRY CO., LTD.
    Inventors: Tomohisa YAMASHITA, Masafumi OGATA, Yuki ARAI, Keisuke YOSHIZAWA, Yoshihisa TAKANO, Shinji NISHIDA
  • SLIDE COMPONENT
    Publication number: 20170241549
    Abstract: In an embodiment, a slide component includes one slide part 5 provided, on a low-pressure side of a sealing face thereof, with a negative pressure generation mechanism 10 including a negative pressure generation groove 10. The negative pressure generation groove 10a communicates with a high-pressure fluid side and is separated from a low-pressure fluid side by a land portion R. Another slide part 1 is provided, in a sealing face thereof, with at least one interference groove 15 communicating with the high-pressure fluid side for producing pressure variations in a fluid in the negative pressure generation groove 10a. The at least one interference groove 15 has an end 15a on an inside-diameter side extending to a position to radially overlap the negative pressure generation groove 10a.
    Type: Application
    Filed: October 28, 2015
    Publication date: August 24, 2017
    Applicant: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi ITADANI, Kazumasa SUNAGAWA, Yuichiro TOKUNAGA, Hideyuki INOUE, Takeshi HOSOE, Ryoma YAMAKAWA, Yuta NEGISHI, Kenji KIRYU, Keiichi CHIBA, Akira YOSHINO, Hiroshi KUBOTA
  • MECHANICAL SEAL DEVICE
    Publication number: 20170241548
    Abstract: In an embodiment, a mechanical seal device has a mating ring (31) that rotates with a rotating shaft (1), as well as a seal ring (33) that slidably contacts the mating ring (31), so as to seal between the rotating shaft (1) and a seal cover (5) fixed to an equipment main body (2), wherein the seal cover (5) is a split structure comprising at least an inner-diameter-side seal cover (8) and an outer-diameter-side seal cover (7), the inner-diameter-side seal cover (8) is detachably connected to the outer-diameter-side seal cover (7), and the seal ring (33) is connected to the inner-diameter-side seal cover (8) in a securely following manner.
    Type: Application
    Filed: October 27, 2015
    Publication date: August 24, 2017
    Applicants: EAGLE INDUSTRY CO., LTD., EAGLEBURGMANN JAPAN CO., LTD.
    Inventors: Masakazu KITO, Hiroshi TANAKA