Creates Counter Pressure Patents (Class 277/388)
  • Patent number: 12188516
    Abstract: An annular sliding component includes a sliding surface provided with a plurality of fluid introduction grooves communicating with a space on the side of a sealing target fluid and introducing the sealing target fluid and a plurality of inclined grooves extending from a leakage side toward the sealing target fluid and generating a dynamic pressure and the sliding surface of the sliding component is provided with at least a concave portion disposed between adjacent two of the fluid introduction grooves in the circumferential direction.
    Type: Grant
    Filed: May 31, 2021
    Date of Patent: January 7, 2025
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Yuta Negishi, Ryosuke Uchiyama, Hiroki Inoue, Minori Onuma, Yoshiaki Takigahira, Hikaru Katori, Nobuo Nakahara, Takeshi Hosoe
  • Patent number: 12152631
    Abstract: A pair of sliding members sliding relative to each other at sliding faces is configured such that at least one of the sliding faces (S) includes a negative pressure generation mechanism (41) surrounded by a land portion and a branched portion (42) arranged in the sliding face S and branched from the negative pressure generation mechanism (41). The sliding members can be formed compact and is applicable to equipment for rotation in both directions, while sliding torque reduction and sealing function improvement can be realized.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: November 26, 2024
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Yuichiro Tokunaga
  • Patent number: 12018757
    Abstract: A sliding surface of the sliding component is provided with a communication groove having a start point communicating with a sealed fluid side in a radial direction, a storage groove communicating with the communication groove, and a plurality of dynamic pressure generation grooves generating a dynamic pressure at end points thereof upon a run of the rotating machine and the dynamic pressure generation grooves are located on a side of the sealed fluid side space with respect to the storage groove in the radial direction.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: June 25, 2024
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hiroshi Suzuki, Yuichiro Tokunaga, Yuta Negishi, Hiroki Inoue, Shogo Fukuda, Wataru Kimura
  • Patent number: 12013040
    Abstract: A pair of sliding components are disposed at a relatively rotating position at the time of running a rotary machine and formed in an annular shape in which a sealed liquid is present on one side of an inner radial side and an outer radial side and a gas is present on the remaining side thereof. A sliding surface of a sliding component is provided with a dynamic pressure generation groove which communicates with the side of a gas in a radial direction and which is configured to generate a dynamic pressure between the sliding surfaces by the gas at the time of running the rotary machine. A sliding surface of a sliding component is provided with a groove which extends in a circumferential direction.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: June 18, 2024
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hiroshi Suzuki, Tadatsugu Imura, Iwa Ou, Yuichiro Tokunaga
  • Patent number: 12007027
    Abstract: Provided is a sliding component capable of exhibiting stable sliding performance under various conditions. The sliding component includes a first ring and a second ring which are provided with facing surfaces facing each other and relatively rotated upon a drive of a rotating machine. At least the first ring is provided with a curved surface portion formed in a convex shape and forming at least a part of the facing surface of the first ring.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: June 11, 2024
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Tadatsugu Imura
  • Patent number: 11933405
    Abstract: A sliding component includes: a dynamic pressure generation groove provided in a sliding surface of the sliding component, the dynamic pressure generation groove having a first end forming a closed end and a second end forming an inlet communicating with any one side of a sealed fluid side and a leakage side in a radial direction; and a deep groove provided in the sliding surface and deeper than the dynamic pressure generation groove, an inlet 16a of the deep groove communicating with an inlet of the dynamic pressure generation groove on a side of a side wall of the dynamic pressure generation groove, the side wall being circumferentially opposite to a dynamic pressure generation wall constituting another side wall of the dynamic pressure generation groove.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: March 19, 2024
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Yuichiro Tokunaga, Tadatsugu Imura, Hiroshi Suzuki, Iwa Ou
  • Patent number: 11892081
    Abstract: A sliding component having excellent lubricity and a high recovery rate of a sealed fluid is provided. In a mechanical seal as a sliding component in which a plurality of spiral grooves serving as a plurality of dynamic pressure generation grooves extending from a low pressure side to a high pressure side are formed on a sliding surface of a stationary seal ring serving as any one sliding member in the mechanical seal, the sliding surface is provided with an annular groove serving as a recessed portion extending in a circumferential direction and opened to the low pressure side and the annular groove communicates with the spiral groove.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: February 6, 2024
    Inventors: Hiroki Inoue, Yuta Negishi, Minori Onuma, Iwa Ou, Tadatsugu Imura, Hiroshi Suzuki
  • Patent number: 11821462
    Abstract: In a pair of sliding members (3, 5) sliding relative to each other on sliding surfaces (S), at least one of the sliding surfaces (S) includes a dynamic pressure generation mechanism (11), and the curvature of the dynamic pressure generation mechanism (11) is set to increase in proportion to the flow path length of the dynamic pressure generation mechanism (11). The sliding member can exhibit a pumping action even at low-speed rotation and can exhibit sealing function and lubrication function.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: November 21, 2023
    Inventor: Tadatsugu Imura
  • Patent number: 11821521
    Abstract: A sliding surface of an annular sliding component disposed at a relatively rotating position of a rotating machine is provided with a plurality of dynamic pressure generating groove groups arranged in a circumferential direction, each including a plurality of dynamic pressure generating grooves having a start point opening to one radial edge of the sliding surface S and an end point closing within the sliding surface while extending circumferentially, in the circumferential direction.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: November 21, 2023
    Inventors: Tadatsugu Imura, Hiroshi Suzuki, Yuichiro Tokunaga
  • Patent number: 11815184
    Abstract: A sliding component includes a dynamic pressure generation groove configured for generating dynamic pressure on a sliding surface, which groove includes an introduction port formed in one end side of the groove in a circumferential direction and which is open to a sealing target fluid H side, a throttle portion communicating with the introduction port and having a narrowed flow path, and a lead-out port formed on the other end side of the groove, which communicates with the throttle portion and which is open to the sealing target fluid side.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: November 14, 2023
    Inventors: Hiroki Inoue, Yuta Negishi, Yuki Maetani, Sayaka Miyazaki
  • Patent number: 11608897
    Abstract: The purpose of the present invention is to provide a slide component that can exhibit sealing performance and lubricity regardless of rotating direction. A pair of slide components 4, 7 that slide relative to each other have sliding faces S that slide relative to each other, and a sealed fluid-side periphery 16 and a leakage-side periphery 15. The sliding face S of at least one slide component 4 of the pair of slide components 4, 7 includes: a fluid introduction groove 13 in communication with the sealed fluid-side periphery 16; a first pressure generation mechanism 12 of which one end is in communication with the fluid introduction groove 13 and the other end is surrounded by a land portion R1; and a second pressure generation mechanism 11 of which one end is in communication with the leakage-side periphery 15 and the other end is surrounded by an annular land portion R2.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: March 21, 2023
    Inventors: Tetsuzo Okada, Masatoshi Itadani, Takeshi Hosoe, Yuki Sasaki, Keita Kajihara
  • Patent number: 11454324
    Abstract: A face seal assembly includes a seal carrier, a seal element supported by the seal carrier, a rotating seal plate interactive with the seal element to define a face seal, and a seal arrester configured to engage the seal carrier at a predetermined amount of wear of the seal element to stop wear of the seal element.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: September 27, 2022
    Assignee: RAYTHEON TECHNOLOGIES CORPORATION
    Inventors: Andrew V. Schwendenmann, Armando Amador, Joseph B. Phelps, Sean McCutchan
  • Patent number: 11401832
    Abstract: A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a compressor section, a combustor section, a turbine section, and at least one rotatable shaft. The engine further includes a seal assembly having a seal plate mounted for rotation with the rotatable shaft, a face seal in contact with the seal plate at a contact area, and a seal carrier supporting the face seal. Further, in normal operating conditions, the seal plate includes a plurality of tabs configured to separate from a remainder of the seal plate in a worn seal condition in which the seal carrier contacts the seal plate.
    Type: Grant
    Filed: January 5, 2021
    Date of Patent: August 2, 2022
    Assignee: RAYTHEON TECHNOLOGIES CORPORATION
    Inventors: Andrew V. Schwendenmann, Joseph B. Phelps, Sean P. McGee
  • Patent number: 11377954
    Abstract: A turbine or compressor wheel mounted in a housing. The wheel is carried on two radial bearings both mounted in a wall of the housing. The wall has a venting orifice that is not impeded by moving parts such as bearings. The wall also has a circular seal member extending toward a back-disk of the wheel with only a very small clearance. The seal member is composed of a material significantly softer than the material of the wheel.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: July 5, 2022
    Assignee: Garrett Transportation I Inc.
    Inventors: James W. Reyenga, Glenn F. Thompson, Mike Guidry
  • Patent number: 10883604
    Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: January 5, 2021
    Inventors: Hideyuki Inoue, Takeshi Hosoe, Yuta Negishi, Yuichiro Tokunaga
  • Patent number: 10883603
    Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: January 5, 2021
    Inventors: Hideyuki Inoue, Takeshi Hosoe, Yuta Negishi, Yuichiro Tokunaga
  • Patent number: 10781924
    Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: September 22, 2020
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Takeshi Hosoe, Yuta Negishi, Yuichiro Tokunaga
  • Patent number: 10731656
    Abstract: A self-adjusting drum system for use with a pump or similar rotating machinery includes a balancing drum mounted on a central shaft for joint rotation therewith. The shaft extends along an axial direction and the balancing drum has an outer surface. A fixed, stationary structure surrounding the balancing drum is provided. The stationary structure has an inner surface arranged so as to face the outer surface of the balancing drum, and an annular gap is provided therebetween. A bush element is arranged in the annular gap so as to leave clearance with respect to the inner and/or outer surfaces. A fixing component is further provided for fixing the bush element to the stationary structure so as to lock the bush element against movement along the axial direction and allow it to freely move along a radial direction, inside the annular gap.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: August 4, 2020
    Assignee: XYLEM EUROPE GMBH
    Inventor: Gottfried Huber
  • Patent number: 10557554
    Abstract: A secondary seal of a mechanical seal comprises an annular sealing gasket and backing plate surrounding a cylindrical sealing surface, all of which can be made of the same metallic material. The gasket is C-shaped in cross section, and is axially pressed during operation into a C-shaped groove formed in the backing plate, the groove being shallower and larger in inner diameter than the gasket, so that the gasket, when pressed into the groove, deforms radially inward and seals against both the backing plate and the sealing surface. The contact area between the gasket and sealing surface increases with pressure. In embodiments, when the pressure is released, the gasket retracts from the sealing surface, allowing easy disassembly and allowing axial movement of the gasket and backing plate. Highly polished surfaces of the gasket and sealing surface can allow axial motion thereof during operation to maintain the seal face gap.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: February 11, 2020
    Assignee: Flowserve Management Company
    Inventors: Eric Hamilton, Daniel Nelson
  • Patent number: 10487948
    Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: November 26, 2019
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Takeshi Hosoe, Yuta Negishi, Yuichiro Tokunaga
  • Patent number: 10113648
    Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The fluid communication paths 12 are provided with spiral grooves 13 for discharging fluid. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: October 30, 2018
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Takeshi Hosoe, Yuta Negishi, Yuichiro Tokunaga
  • Patent number: 10072759
    Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The lands 10 have different lengths in the radial direction. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: September 11, 2018
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Takeshi Hosoe, Yuta Negishi, Yuichiro Tokunaga
  • Patent number: 9951873
    Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: April 24, 2018
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Takeshi Hosoe, Yuta Negishi, Yuichiro Tokunaga
  • Patent number: 8931783
    Abstract: A seal assembly for providing a seal between a pair of relatively rotatable components has; a first seal ring (30) mounted in sealing relationships, non-rotatably and for limited axial movement on a first of the components; a second seal (50) ring mounted in axially aligned relationship to the first seal ring, said second seal ring being mounted in sealing relationship, non-rotatably and for limited axial movement on a second of the components; first resilient means associated with the second seal ring urging it axially towards the first seal ring, second resilient means (40) acting on the first seal ring urging it away from the second seal ring to separate the first and second seal rings; and a centrifugal actuator (19) associated with the first seal ring, said centrifugal actuator comprising a radially extending chamber (38) between the first seal ring and the component associated therewith, said chamber being connected to a source of fluid, whereby when the components rotate relative to one another with fl
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: January 13, 2015
    Inventors: Nicholas Derek Quarmby, Kjell Klintenstedt
  • Patent number: 8783691
    Abstract: A mechanical seal device is provided for use when fluid pressure is frequently switched between positive and counter pressures. A rotary ring is provided on a rotary shaft and a stationary ring assembly is provided on which the stationary ring side sliding face is formed. A seal cover is provided containing the stationary ring assembly on an inner diameter side and supports the freely moving assembly in an axial direction of the rotary shaft along with a first O-ring to seal the first fluid and a second O-ring to seal the second fluid. A low-pressure chamber is sealed from the first fluid and the second fluid and maintains pressure lower than those of the first and the second fluids.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: July 22, 2014
    Assignee: Eagle Industry Co., Ltd.
    Inventor: Yoshihiro Suefuji
  • Patent number: 8668155
    Abstract: A high pressure rotary nozzle having a rotating shaft operating within a fixed housing wherein the of axial force which acts upon the shaft due to the fluid pressure at the shaft inlet is balanced by allowing passage of a small amount of the pressurized fluid to be bled to an area or chamber between the outside of the opposite end of the shaft and the inside of the housing where the fluid pressure can act axially in an opposing direction upon the shaft to balance the axial inlet force. The balance of axial forces is self-regulating by controlling escape of the fluid through a tapered or frusto-conical region between the shaft and housing. This further provides a fluid bearing between the two surfaces and allows use of interchangeable rotating jet heads having jet orifices which can be oriented in virtually any desirable configuration including axially forward of the nozzle.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 11, 2014
    Assignee: Stoneage, Inc.
    Inventor: Douglas E. Wright
  • Publication number: 20120248704
    Abstract: An seal is described for a turbine with a first sealing surface mounted on a stationary part of a turbine and a second sealing surface mounted on a rotating part of the turbine, the surfaces being structured such that in operation the thin film of a fluid medium is generated between the two surfaces reducing contact and/or leakage with at least one of the first or second sealing surface mounted such that it is subject to a retracting force which opens the seal while stationary or at slow rotation speeds of the turbine and subject to a force counteracting the retracting force at operational rotation speeds of the turbine. The surface of the sealing face may incorporate patterns straight or helical in nature to help induce the fluid into the gap and maintain the fluid film.
    Type: Application
    Filed: March 28, 2012
    Publication date: October 4, 2012
    Applicant: ALSTOM TECHNOLOGY LTD.
    Inventors: Cyril William Fennell, Vassilis Stefanis
  • Patent number: 8256575
    Abstract: Methods and systems for reducing a flow of ambient air into a bearing lubricating oil system are provided. The system includes a lubricating oil bearing cover that is stationary with respect to the bearing wherein the bearing is configured to support a portion of a rotatable machine shaft. The cover includes a first end cap extending radially inwardly towards the shaft such that a cavity surrounding the bearing is formed by the cover and the first end cap and a set of seal rings positioned substantially concentric with the shaft and forming a seal against lubricating oil flow. The seal rings include a plurality of wire bristles extending radially inwardly from the end cap wherein the wire bristles are configured to extend to a surface of the shaft when assembled and the bristles are configured to present a tortuous flow path to gas infiltrating the cavity.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: September 4, 2012
    Assignee: General Electric Company
    Inventor: Nathan Robert Berberich
  • Patent number: 8220724
    Abstract: A high pressure rotary nozzle having a rotating shaft operating within a fixed housing wherein the of axial force which acts upon the shaft due to the fluid pressure at the shaft inlet is balanced by allowing passage of a small amount of the pressurized fluid to be bled to an area or chamber between the outside of the opposite end of the shaft and the inside of the housing where the fluid pressure can act axially in an opposing direction upon the shaft to balance the axial inlet force. The balance of axial forces is self-regulating by controlling escape of the fluid through a tapered or frusto-conical region between the shaft and housing. This further provides a fluid bearing between the two surfaces and allows use of interchangeable rotating jet heads having jet orifices which can be oriented in virtually any desirable configuration including axially forward of the nozzle.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: July 17, 2012
    Assignee: Stoneage, Inc.
    Inventor: Douglas E. Wright
  • Publication number: 20120098204
    Abstract: A seal assembly for providing a seal between a pair of relatively rotatable components has; a first seal ring (30) mounted in sealing relationship, non-rotatably and for limited axial movement on a first of the components; a second seal (50) ring mounted in axially aligned relationship to the first seal ring, said second seal ring being mounted in sealing relationship, non-rotatably and for limited axial movement on a second of the components; first resilient means associated with the second seal ring urging it axially towards the first seal ring,—second resilient means (40) acting on the first seal ring urging it away from the second seal ring to separate the first and second seal rings; and a centrifugal actuator (20) associated with the first seal ring, said centrifugal actuator comprising a radially extending chamber (38) between the first seal ring and the component associated therewith, said chamber being connected to a source of fluid, whereby when the components rotate relative to one another with flu
    Type: Application
    Filed: May 6, 2010
    Publication date: April 26, 2012
    Applicant: John Crane UK Limited
    Inventors: Nicholas Derek Quarmby, Kjell Klintenstedt
  • Patent number: 8016210
    Abstract: A high pressure rotary nozzle having a rotating shaft operating within a fixed housing wherein the of axial force which acts upon the shaft due to the fluid pressure at the shaft inlet is balanced by allowing passage of a small amount of the pressurized fluid to be bled to an area or chamber between the outside of the opposite end of the shaft and the inside of the housing where the fluid pressure can act axially in an opposing direction upon the shaft to balance the axial inlet force. The balance of axial forces is self-regulating by controlling escape of the fluid through a tapered or frusto-conical region between the shaft and housing. This further provides a fluid bearing between the two surfaces and allows use of interchangeable rotating jet heads having jet orifices which can be oriented in virtually any desirable configuration including axially forward of the nozzle.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: September 13, 2011
    Assignee: Balanced Body, Inc.
    Inventor: Douglas E. Wright
  • Patent number: 8006920
    Abstract: A high pressure rotary nozzle having a rotating shaft operating within a fixed housing wherein the of axial force which acts upon the shaft due to the liquid pressure at the shaft inlet is balanced by allowing passage of a small amount of the pressurized liquid to be bled to an area or chamber between the outside of the opposite end of the shaft and the inside of the housing where the liquid pressure can act axially in an opposing direction upon the shaft to balance the axial inlet force. The balance of axial forces is self-regulating by controlling escape of the liquid through a tapered or frusto-conical region between the shaft and housing. This further provides a liquid bearing between the two surfaces and allows use of interchangeable rotating jet heads having jet orifices which can be oriented in virtually any desirable configuration including axially forward of the nozzle.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: August 30, 2011
    Assignee: Stoneage, Inc.
    Inventors: Douglas E. Wright, John E. Wolgamott
  • Patent number: 7635096
    Abstract: A high pressure rotary nozzle having a rotating shaft operating within a fixed housing wherein the of axial force which acts upon the shaft due to the liquid pressure at the shaft inlet is balanced by allowing passage of a small amount of the pressurized liquid to be bled to an area or chamber between the outside of the opposite end of the shaft and the inside of the housing where the liquid pressure can act axially in an opposing direction upon the shaft to balance the axial inlet force. The balance of axial forces is self-regulating by controlling escape of the liquid through a tapered or frusto-conical region between the shaft and housing. This further provides a liquid bearing between the two surfaces and allows use of interchangeable rotating jet heads having jet orifices which can be oriented in virtually any desirable configuration including axially forward of the nozzle.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: December 22, 2009
    Assignee: StoneAge, Inc.
    Inventors: Douglas E. Wright, John E. Wolgamott
  • Publication number: 20080217862
    Abstract: An arrangement of a shaft with a slip-ring seal mounted thereon is disclosed. The slip-ring seal (3) comprises a pair of cooperating slip rings (4,5), the sealing faces of which define a sealing gap (6) between them. One of the slip rings is mounted on the shaft (2) with torque transmission from a drive element (9) mounted on the shaft, whilst the other slip ring is provided for fixed mounting on a stationary component. The arrangement is characterised in that the drive element (9) comprises a tubular drive housing (11), extending over the external circumference of the slip ring (4) with a radial gap (12) and a passage (13) for introduction of a flow medium is provided, opening out at one end in a chamber (A), defined by the drive housing (11), which drains out through the radial gap (12), whereby the radial gap forms a flow path for the flow medium which terminates at or near the sealing gap (6).
    Type: Application
    Filed: December 1, 2005
    Publication date: September 11, 2008
    Applicant: BURGMANN INDUSTRIES GMBH & CO. KG
    Inventors: Peter Feigl, Andreas Lederer, Clemens Simon
  • Patent number: 6739592
    Abstract: A brush seal device is mounted to one of two parts that move relative to each other with a gap therebetween, and seals the gap between the parts. Even when a brush seal abuts on the other part, it is deformed accordingly. As a result, wear of the brush seal is prevented. The brush seal device includes: a brush seal formed from bristles arranged into a wall shape, and including an attachment portion formed by connecting the bristles together at one end, and a free end face facing an opposing surface of the other part; a back plate connected to the attachment portion of the brush seal, and including a support surface for supporting a side surface of the brush seal; and a retaining plate for retaining the attachment portion of the brush seal between the retaining plate and the back plate. The support surface of the back plate and an opposing surface of the brush seal are disposed at a distance from each other. The bristle of the brush seal has a diameter of 0.15 mm to 0.008 mm.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: May 25, 2004
    Assignee: Eagle Engineering Aerospace Co., Ltd.
    Inventor: Toru Kono
  • Patent number: 6688602
    Abstract: The mechanical seal (3) includes: a rotary side sliding ring (32) which is supported by the large diameter side outer circumferential face (23) of the annular step section (21) of the rotary shaft (2) via the rotary side O-ring (37) and press-fitted into the annular step section (21) by gas pressure in the device; and an unturnable stationary side sliding ring (31) which is fixed onto the seal housing (1) side via the stationary side O-ring (33) being capable of moving in the axial direction and being able to come into close contact with the sliding protrusion (323) of the rotary side sliding ring (32) due to the spring (36) so that the airtightly sealed sliding face S is formed. The rotary side sliding ring (32) is made of self-lubrication sliding material, and the stationary side sliding ring (31) is made of sliding material, the Young's modulus of which is higher than that of the self-lubrication sliding material.
    Type: Grant
    Filed: January 2, 2002
    Date of Patent: February 10, 2004
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Takeshi Yamada, Takayuki Imai, Yoshiaki Takigahira
  • Patent number: 6224061
    Abstract: A mechanical shaft seal includes a rotary assembly and a stationary assembly each of which carry a respective mating seal face. One of the seal faces is located on a floating component mounted for axial movement with respect to the shaft. Means are provided for urging the floating component in a direction towards the other of said seal faces. A non-metallic end cap is provided to protect the seal in the case where the sealed product attacks metallic material. The end cap is arranged so that, in use, it is subjected to substantially balanced hydraulic loading.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: May 1, 2001
    Assignee: AES Engineering Limited
    Inventor: Alan James Roddis
  • Patent number: 6173962
    Abstract: A brush seal includes a mounting ring that carries radially inwardly directed bristles. A backing member attached to the mounting ring is positioned alongside the bristles. A chamber defined by the bristles and the backing member is pressurized with fluid to counteract the lateral forces imposed upon the bristles by a region of high fluid pressure that they are operationally adjacent. As a result of this balancing of forces, the bristles are free to move radially inward and outward so that their free ends remain in sealing engagement with an adjacent surface.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: January 16, 2001
    Assignee: Rolls Royce PLC
    Inventors: Michael K. Morrison, Peter A. Withers, Terence V. Jones, Peter E. Wood
  • Patent number: 6155572
    Abstract: A mechanical seal for providing fluid sealing between a housing and a rotatable shaft includes a first seal ring having a first seal face and a second seal ring having a second seal face. The first seal face further has a first portion and a second portion and the seal faces of the first and second seal rings are opposed to each other when assembled. The first seal ring or the second seal ring is adapted to rotate with the rotatable shaft, and the other seal ring is restrained from rotating. The seal is a non-contacting seal that provides for the introduction of a barrier fluid between the seal faces. A first surface of the first seal ring and a first surface of the second seal ring are exposed to the process fluid. An opening force is developed between the first and second seal faces that inhibits contact between the seal faces.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: December 5, 2000
    Assignee: A.W. Chesterton Company
    Inventors: Shi-Feng Wu, Christopher A. Kowalski, Henri V. Azibert
  • Patent number: 6116609
    Abstract: A fluidic feedback pressure regulation system employs one or more fluids within a mechanical seal to control one or more other fluids. The system includes a fluid manifold and a movable differential pressure valve, both of which are completely mounted within a bore in the seal gland. The valve is connected to several fluid distribution networks, so that the valve can establish fluid communication between a regulated fluid (such as barrier or process fluid) and either (1) a high pressure fluid supply to increase the pressure of one of the fluids, or (2) an exhaust vent in order to remove fluid from the fluid distribution, concomitantly reducing the fluid pressure in the seal. All the fluids utilized in the seal are regulated by the pressure system with respect to each other in order achieve, pressure-wise, optimal seal operating conditions. In particular, the fluids can be regulated during use to achieve certain leakage characteristics.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: September 12, 2000
    Assignee: A. W. Chesterton Company
    Inventor: Henri V. Azibert
  • Patent number: 5904355
    Abstract: A rotor for collecting and centrifuging biological fluids in a range of volumes. The rotor includes an elastic impermeable diaphragm which defines at least a portion of a variable-volume processing chamber, where the fluid is centrifuged. The rotor includes a rigid mounting member, to which the diaphragm is mounted and which is held and spun by a chuck. Preferably, this rigid mounting member includes a boundary wall which together with the elastic diaphragm defines the chamber. The boundary wall may be a substantially imperforate circular wall which extends to the periphery of the processing chamber but defining one opening, preferably near the axis of rotation, permitting a conduit or conduits to pass therethrough so as to be in fluid communication with the processing chamber. The rotor may include a separate structure for controlling the flow of liquid out of the chamber into the conduit.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: May 18, 1999
    Assignee: Transfusion Technologies Corporation
    Inventor: Edward T. Powers
  • Patent number: 5865441
    Abstract: The shaft seal assembly of cartridge designed for sealing shafts entering or exiting enclosed vessels. The enclosed vessels may have a pressure different from the atmospheric pressure and the seal will normally prevent leakage from or into the vessel. The seal is accomplished by having a plurality of fluid pressures presented to different faces or portions of the seals. Utilization of these pressures provides a seal between the faces of the rotating parts and the stationary parts of the seal with a minimum of friction. This reduced friction is a result of some amount of air movement between the sealing faces. This air movement into and out of the seal, resulting from fluid pressure differentials, will also carry away any contaminants that may get into the seal, either to the ambient atmosphere or to a recovery system. The seal is designed to accept axial and radial shaft displacement while maintaining a positive seal between the vessel and the atmosphere.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: February 2, 1999
    Inventor: David C. Orlowski
  • Patent number: RE46074
    Abstract: A supercharged internal combustion engine includes a motor unit having a head and an exhaust manifold. A turbocharger assembly is fluid dynamically connected to the exhaust manifold, wherein the turbocharger assembly includes a turbine, a central body and a compressor. The turbocharger assembly includes a lubrication channel for the passage of a lubricating fluid hydraulically connected to a lubrication circuit of the motor unit of said internal combustion engine. The turbine includes a jacket, provided at least in part in a body thereof, arranged for the passage of a cooling fluid and in hydraulic communication with an inlet channel and an outlet channel hydraulically connected to a cooling circuit of the motor unit of said internal combustion engine. The inlet channel, outlet channel and lubrication channel are integrated in said turbocharger assembly in correspondence of a connection interface between said turbocharger assembly and the motor unit.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: July 19, 2016
    Assignee: C.R.F. SOCIETA CONSORTILE PER AZIONI
    Inventors: Marco Cuniberti, Roberto Saretto, Damiano Micelli