With Mechanical Sealing Patents (Class 418/104)
  • Patent number: 10359043
    Abstract: An oil-free screw compressor has a screw rotor including a screw and a shaft, a bearing supporting the shaft, a first shaft seal device disposed between the screw and the bearing and including a first seal opposite to the shaft, and a first communication portion communicating the inner periphery face and the outer peripheral face of the first shaft seal device, a second shaft seal device disposed between the first shaft seal device and the bearing and including a second seal opposite to the shaft, and a second communication portion communicating an inner periphery face and the outer peripheral face of the second shaft seal device, and a casing including an atmosphere communication portion connected to both of the first communication portion and the second communication portion on the inner peripheral face of a shaft accommodation space.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: July 23, 2019
    Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Toshiyuki Miyatake
  • Patent number: 10197056
    Abstract: A sealing arrangement is disclosed for use in a pump. The sealing arrangement can include a first pump component having a first face surface. The first face surface can have a sealing protrusion thereon. A second pump component can have a second face surface positioned in confronting relation to the first face surface. The second pump component can define a sealing cavity for holding a fluid under pressure. The sealing protrusion is positioned to engage the second face surface when the first face surface is pressed against the second face surface so that the sealing protrusion seals against the second face surface to prevent movement of the fluid from the sealing cavity past the sealing protrusion. Other embodiments are described and claimed.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: February 5, 2019
    Assignee: CICOR PUMPS NORTH AMERICA, LLC
    Inventors: Philip Taylor Alexander, Robert E. Oehman
  • Patent number: 10138889
    Abstract: An oil-free screw compressor with good assemblability of a shaft seal device that reduces leakage of a compressed gas, where the oil-free screw compressor accommodates male and female screw rotors in a rotor chamber of a casing, supports each screw rotor by a bearing through a rotor shaft, and has shaft seal devices in a shaft seal space. The shaft seal devices include an oil seal on the side of the bearing, a packing case on the side of the rotor chamber, and a gas seal. An end of the packing case on the side of the bearing and an end of the oil seal on the side of the rotor chamber are fitted and fixed by interference fit to form a gas seal accommodation space, the gas seal accommodation space accommodating the seal ring.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: November 27, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Yoshio Yano, Toshiyuki Miyatake
  • Patent number: 9835155
    Abstract: A gear pump apparatus includes a gear pump and a sealing mechanism which includes an annular rubber member, an outer member, and an inner member. One of the outer member and a casing of the gear pump apparatus has a contact member located outside a portion of the outer member which contacts the gear pump in a radial direction of the gear pump. The contact member is placed to create a physical contact between the outer member and the casing to absorb a part of force by which the outer member is pressed against the gear pump. This results in a decrease in pressure acting on an area of contact between the outer member and the gear pump, which leads to a drop in resistance to sliding between the gear pump and the outer member, thus decreasing a loss of torque required for the pumping operation of the gear pump.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: December 5, 2017
    Assignee: ADVICS Co., Ltd.
    Inventors: Takashi Hashiba, Naoki Hakamada, Takahiro Naganuma, Tomoaki Kawabata
  • Patent number: 9435454
    Abstract: A tungsten carbide seat for high-pressure oilfield well service pumps is disclosed. A bonding agent, in conjunction with an interference tapered fit between the valve seat and fluid end housing eliminates stresses created in prior art interference fits. Three interface embodiments are disclosed: a shallow taper combined with a shoulder, a steep taper without a shoulder, and a compound surface in which the seat has an external concave surface and the housing surface that mates with the seat has a convex surface.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: September 6, 2016
    Inventor: George H Blume
  • Patent number: 9022760
    Abstract: A compressor for compressing refrigerant in a refrigerant circuit includes a housing defining a compression chamber. A screw rotor is mounted within the housing and configured to form a pocket of high pressure refrigerant and a pocket of low pressure refrigerant within the compression chamber. The screw rotor has a rotor shaft rotating about an axis. A bearing cavity includes at least one bearing rotatably supporting the rotor shaft. A partition through which the rotor shaft extends separates the bearing cavity from the compression chamber. A contacting seal is sealingly engaged with the rotor shaft and disposed in the bearing cavity proximate the partition. A passage has an opening adjacent the rotor shaft between the contacting seal and the compression chamber and in fluid communication with the pocket of low pressure refrigerant.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: May 5, 2015
    Assignee: Trane International Inc.
    Inventors: Robert S. Bakkestuen, Jay H. Johnson
  • Publication number: 20150093278
    Abstract: The present invention relates to an engine or pump called rotary piston engine or pump, comprising a shape of revolution F relative to a delta axis, and rotatably movable about said delta axis in relation to an envelope V, and n cavities distributed over the perimeter of F. In each cavity is housed a rotating roller, characterized in that at least one roller has its centre angle determined so as to obtain the closed volumes it delimits, as large as possible.
    Type: Application
    Filed: May 7, 2013
    Publication date: April 2, 2015
    Inventor: William Gruet
  • Patent number: 8992194
    Abstract: A seal member is configured so that an annular rubber member is disposed in an annular storage chamber of a resin annular member. Thus, the rubber annular member is not directly in contact with a drive shaft, and the rubber annular member can be prevented from wearing or peeling without requiring a rotation stopping structure for the seal member. Furthermore, the seal member is provided with first and second communication mouths, so that a brake fluid pressure is applied to compartments obtained by dividing the annular storage chamber using the rubber annular member. Thus, the rubber annular member is pressed, and then is elastically deformed, and accordingly, the resin annular member is expanded by the elastic force. Thus, a self-sealing operation can be performed on the basis of a high pressing force.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: March 31, 2015
    Assignee: Advics Co., Ltd.
    Inventors: Yuki Nakamura, Tomoaki Kawabata
  • Publication number: 20150071806
    Abstract: A rotary vane air motor comprises a rotor, stator and vanes. The rotor has slots for the vanes, and the vanes may move between a retracted position and a contact position in which the vanes contact the cylinder. Each vane may have a longitudinal portion whose shape conforms generally to the slot, and a transverse portion that is radially outside of the slot and extends at least in part in a direction that is transverse to the longitudinal portion and that may be tangential to the perimeter of the rotor at the slot. The shape of the perimeter may be a polygon with rounded corners. The vanes may also include a magnetic portion or a rotating portion.
    Type: Application
    Filed: November 17, 2014
    Publication date: March 12, 2015
    Inventors: Davey Z. Liang, Daniel S. Cox
  • Patent number: 8974204
    Abstract: In a scroll compressor, a sealing portion of a discharge cover placed between a suction spacer and a discharge space is formed to be spaced apart in an axial direction from a fixed scroll, whereby the discharge cover is in contact with a fixture in an axial direction only on a single circumference, facilitating fabrication and assembling of the discharge cover. Also, after assembly, when the discharge cover is pressurized toward the fixed scroll by a discharge pressure of a refrigerant discharged to the discharge space, the discharge cover does not transfer pressurization force to the fixed scroll, thus reducing a frictional loss between the fixed scroll and an orbiting scroll.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: March 10, 2015
    Assignee: LG Electronics Inc.
    Inventors: Junhong Park, Jangheon Choi, Gisub Roh, Honggyun Jin
  • Patent number: 8905735
    Abstract: According to one embodiment of the invention, an engine system comprises a housing, an outer gerotor, an inner gerotor, a tip inlet port, a face inlet port, and a tip outlet port. The housing has a first sidewall, a second sidewall, a first endwall, and a second endwall. The outer gerotor is at least partially disposed in the housing and at least partially defines an outer gerotor chamber. The inner gerotor is at least partially disposed within the outer gerotor chamber. The tip inlet port is formed in the first sidewall and allows fluid to enter the outer gerotor chamber. The face inlet port is formed in the first endwall and allows fluid to enter the outer gerotor chamber. The tip outlet port is formed in the second sidewall and allows fluid to exit the outer gerotor chamber.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: December 9, 2014
    Assignees: The Texas A&M University System, StarRotor Corportion
    Inventors: Mark T. Holtzapple, Andrew Rabroker, Michael Kyle Ross, Steven D. Atmur, Gary P. Noyes
  • Patent number: 8894395
    Abstract: A front housing configuring a scroll compressor is provided in its shaft hole with a first bearing, and the front housing rotatably supports a rotation shaft. The first bearing includes a ball bearing having a plurality of balls. First and second seal rings and are provided between an outer ring fixed to the front housing and an inner ring which abuts against an outer peripheral surface of the rotation shaft. A first seal ring disposed on the side of one side surface of the outer ring is provided such that the first seal ring is in non-contact with the inner ring, and the second seal ring disposed on the side of the other side surface of the outer ring abuts against the inner ring.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: November 25, 2014
    Assignee: Keihin Corporation
    Inventors: Yusuke Nishimura, Kazuaki Higuchi, Satsuki Muraoka, Hiroki Kuwata
  • Publication number: 20140271296
    Abstract: The subject matter of this specification can be embodied in, among other things, a rotary vane actuator. A rotor assembly includes longitudinal vanes disposed radially on a central shaft, with each vane connected at their ends to a circular plates secured to the shaft. Each vane has an outer edge, wherein the shaft, a surface of each plate, and the vanes define interior pockets in the rotor assembly. A stator assembly includes two stator elements each having a first longitudinal edge and a second longitudinal edge.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: WOODWARD, INC.
    Inventors: Joseph H. Kim, Robert P. O'Hara, Shahbaz H. Hydari
  • Patent number: 8821141
    Abstract: Various rotary pumps are disclosed that are designed to pump viscous fluids or slurries. Often, the seals of such pumps can become over heated. The disclosed pumps include slots disposed in the rotors and/or slots disposed in the openings through which the drive and driven shafts task so that some of the fluid being pumped through the pumping chamber can migrate through the proximal wall of the pump casing to the seal assemblies disposed on the other side of the proximal wall of the pump casing. Thus, the seal assemblies of the pumps are cooled without resorting to the use of a cooling jacket or other cooling mechanism.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: September 2, 2014
    Assignee: Wright Flow Technologies Limited
    Inventors: Bruce Helgeson, Joe Thompson, Jim Mayer, Chris Mihm, Keith Feeley, Juan Jose Mejia
  • Patent number: 8784086
    Abstract: Rotary piston steam engine with equal double rotary pistons is provided with a balanced rotary variable inlet cut-off valve for enhanced efficiency. The exhaust steam from the primary expansion is routed to secondary expansion avoiding back pressure for additional efficiency. The rotary valve has balanced dual inputs and outputs on opposite sides. The exhaust steam from the primary expansion is taken off when the trailing face of the rotary piston passes the inlet port of the expansion chamber housing, the exhaust outlet secondary expansion being placed approximately 180 degrees from the primary expansion inlet in the curved portion of the expansion chamber housing wherein back pressure is not imparted to the primary expansion.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: July 22, 2014
    Inventors: Errol John Smith, Kenneth Murray Smith
  • Publication number: 20140178234
    Abstract: An internal rotor-type fluid machine includes a rotary shaft, a rotor which rotates together with the rotary shaft, a support portion which is provided on the rotary shaft or the rotor, and which supports the rotary shaft to be tiltable with respect to the rotor, and a pressure chamber inner wall surface which configures a pressure chamber by contacting an end surface of the rotor in an axial direction. The rotor is pressed toward the rotary shaft by a high fluid pressure, based on a pressure difference in the pressure chamber between a high pressure side and a low pressure side having a lower pressure than the high pressure side. The support portion is deviated in a direction away from the pressure chamber inner wall surface further than a center position of the rotor in the axial direction.
    Type: Application
    Filed: December 24, 2013
    Publication date: June 26, 2014
    Applicant: DENSO CORPORATION
    Inventors: Tomoaki KAWABATA, Yuki NAKAMURA
  • Patent number: 8753099
    Abstract: According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor with a rotation of the second gerotor. The synchronizing system includes a earn plate coupled to the first gerotor, wherein the cam plate includes a plurality of cams, and an alignment plate coupled to the second gerotor. The alignment plate includes at least one alignment member, wherein the plurality of cams and the at least one alignment member interact to synchronize a rotation of the first gerotor with a rotation of the second gerotor.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: June 17, 2014
    Assignees: The Texas A&M University System, Starrotor Corporation
    Inventors: Mark T. Holtzapple, George A. Rabroker, Michael K. Ross
  • Patent number: 8747089
    Abstract: An O-ring has a shape including a first portion that is arranged side by side with a suction port in an axial direction, a second portion that is arranged side by side with a suction port, and a third portion that connects these portions. The first portion and the second portion are arranged to be displaced from each other in the axial direction. The third portion is arranged to extend in a direction different from a circumferential direction between the suction port and the suction port when a pump body is viewed in a radial direction. Thus, the suction ports can be located closer to each other in the axial direction. Therefore, the axial direction length of the pump body can be reduced, and size reduction of a rotary pump device can be achieved.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: June 10, 2014
    Assignees: Advics Co., Ltd., Denso Corporation
    Inventors: Yuki Nakamura, Kunihito Ando, Nobuhiko Yoshioka, Takahiro Naganuma, Tomoaki Kawabata
  • Patent number: 8678798
    Abstract: A rotary pump device is provided in which a drive shaft is inserted into a center hole of a cylinder that forms rotor chambers, and into outer rotors and inner rotors of rotary pumps. In the rotary pump device, seal mechanisms that include hollow-shaped resin members and annular rubber members are arranged on an opposite side to the cylinder with respect to the rotary pumps. Metal rings are arranged in hollow portions of the resin members in the seal mechanisms so that the drive shaft is inserted into an inner periphery of the metal rings with a minimum clearance.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: March 25, 2014
    Assignees: Advics Co., Ltd., Denso Corporation
    Inventors: Yuki Nakamura, Kunihito Ando, Nobuhiko Yoshioka, Takahiro Naganuma, Tomoaki Kawabata
  • Publication number: 20130343942
    Abstract: A rotary compressor (100) includes a compression mechanism (3), a motor (2), a suction path (14), a back-pressure chamber (18), a return path (16), an inverter (42), and a controller (44). A check valve (73) of a reed valve type for opening and closing a return port (3c) of the compression mechanism (3) is disposed in the back-pressure chamber (18). The return path (16) functions to return a working fluid to the suction path (14) from the back-pressure chamber (18). A volume-varying valve (17) is provided in the return path (16). The volume-varying valve (17) allows the working fluid to flow through the return path (16) when the suction volume of the compression mechanism (3) should be set relatively small, and precludes the working fluid from flowing through the return path (16) to increase the pressure in the back-pressure chamber (18) when the suction volume of the compression mechanism (3) should be set relatively large.
    Type: Application
    Filed: February 23, 2012
    Publication date: December 26, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Takeshi Ogata, Yu Shiotani, Akira Hiwata, Hiroshi Hasegawa
  • Patent number: 8597007
    Abstract: A pump rotor for a screw pump includes a shaft, a first set of threads disposed on a portion of an outer surface of the shaft, at least one thread of the first set of threads including a groove disposed on an end portion thereof, and a ring seal disposed on the groove such that the ring seal is configured to protrude outwardly from the groove and to rest against an inner surface of a liner of the screw pump, and the groove is sized so as to allow the ring seal to move radially with respect to the plurality of threads as the rotor is deflected.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: December 3, 2013
    Assignee: General Electric Company
    Inventors: Vasanth Srinivasa Kothnur, David Deloyd Anderson
  • Patent number: 8591210
    Abstract: A scroll compressor 40 comprises: housing 12, orbiting scroll 26 and fixed scroll 41. The drive shaft 14 has an eccentric shaft portion 18 so that rotation of the eccentric shaft portion imparts an orbiting motion to the orbiting scroll relative to the fixed scroll. Axial spacers 42 are located between the fixed scroll and the housing for spacing the fixed scroll relative to the orbiting scroll. When the scroll compressor 40 is assembled and tested and it is desired to perform shimming, the fixed scroll can be removed and a selected spacer placed in position prior to re-assembling the fixed scroll.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: November 26, 2013
    Assignee: Edwards Limited
    Inventor: Clive Frederick Collie
  • Patent number: 8556608
    Abstract: A rotor drive mechanism 25 is configured to transfer rotation of a driving shaft 38 to an external screw type rotor 22 of a uniaxial eccentric screw pump 23 via a connecting shaft 39, the driving shaft 38 being rotated such that the center thereof is located at a fixed position. The rotor drive mechanism 25 is configured such that: the driving shaft 38 includes an inner space 46 which is open toward the rotor 22; the connecting shaft 39 is inserted in the inner space 46; and a first seal portion 55 seals between an inner peripheral surface of an opening of the driving shaft 38, the opening being open toward the rotor 22, and an outer peripheral surface of the rotor shaft 37 connected to the rotor 22 configured to carry out an eccentric rotational movement.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: October 15, 2013
    Assignee: Heishin Ltd
    Inventor: Noriaki Sakakihara
  • Patent number: 8556606
    Abstract: A screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft located on the high pressure side, and in this order from the rotor chamber side. It includes a pressurized communicating channel for introducing high-pressure target gas into a pressurized space formed between the first and second non-contact seals, a pressurized pressure detecting device for detecting the pressure of the pressurized space, and an alarm device for generating an alarm when a value detected by the pressurized pressure detecting device falls out of a predefined range of pressurized pressures. The screw fluid machine is capable of detecting or predicting a condition of the shaft sealing device and accurately and reliably reporting the detected condition to an operator.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: October 15, 2013
    Assignee: Kobe Steel, Ltd.
    Inventor: Toru Noguchi
  • Patent number: 8550797
    Abstract: A scroll compressor that includes: a housing, a drive unit configured to generate a rotating force; and a scroll compression unit having a fixed scroll having a spiral scroll wrap for compressing a suctioned fluid and fixed irrespective of a rotation of a drive shaft of the drive unit and a swivel scroll swiveled according to rotation of the drive shaft and having a spiral scroll wrap, comprises: a main frame disposed within the housing to support a rear surface of the swivel scroll and having a back pressure chamber in an interior thereof; a thrust plate disposed between the swivel scroll and the main frame; and a sealing member inserted between the swivel scroll and the main frame. The sealing member includes a first sealing member inserted between the swivel scroll and the thrust plate, and a second sealing member inserted between the thrust plate and the main frame.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: October 8, 2013
    Assignees: Doowon Technical College, Doowon Electronic Co., Ltd.
    Inventors: Geon Ho Lee, In Hwe Koo
  • Patent number: 8539936
    Abstract: A pressure equalization system reduces or eliminates a pressure differential across supercharger rotor shaft seals. Under high boost, rotor shaft seals often fail, allowing hot compressed air into an oil lubricated space containing rotor bearings and gears (and vented to ambient pressure), reducing oil lubricating effectiveness and resulting in increased wear and failure. Under low or non boost operation, the pressure differential is reversed causing the lubricating oil to leak into the supercharger interior and accelerated rotor seal wear. The pressure equalization system includes flow restrictive seals on both rotor shafts, separated from the rotor shaft seals by vented spaces, thereby isolating the rotor shaft seals from boost or vacuum in the supercharger interior and reducing or eliminating the pressure differential across the rotor shaft seals. Maintaining close to atmospheric pressure on both sides of the rotor shaft seals during boost and vacuum operation reduces wear and failures.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: September 24, 2013
    Inventors: James E. Bell, Jan Erik Oscarsson
  • Patent number: 8529234
    Abstract: A water-lubrication type screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft. The bearing is located on the high pressure side and in this order from the rotor chamber side. the bearing includes a low pressure communicating channel for allowing an outflow space formed on the rotor chamber side with respect to the first non-contact seal to communicate with a low pressure channel for the target gas communicating with a low pressure space inside the rotor chamber or the rotor chamber, a pressurized communicating channel for introducing high-pressure target gas into a pressurized space formed between the first and second non-contact seals, and an open communicating channel through which an open space formed between the second non-contact seal and the lip seal opens to the outside of the casing.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: September 10, 2013
    Assignee: Kobe Steel, Ltd.
    Inventors: Shoji Yoshimura, Toru Noguchi
  • Publication number: 20130209306
    Abstract: Rotary displacement machines are known for their uses as compressors, expansion engines and the like. Many comprise two or more rotors mounted for simultaneous rotation within a casing, with inter-meshing or interengagement of lobes and pits as surface features of the rotors, thereby to handle a working fluid. Disclosed herein are rotary displacement machines with improved structures and rotor configurations.
    Type: Application
    Filed: August 19, 2011
    Publication date: August 15, 2013
    Inventor: Peter South
  • Publication number: 20130202470
    Abstract: A rotary vane air motor comprises a rotor, stator and vanes. The rotor has slots for the vanes, and the vanes may move between a retracted position and a contact position in which the vanes contact the cylinder. Each vane may have a longitudinal portion whose shape conforms generally to the slot, and a transverse portion that is radially outside of the slot and extends at least in part in a direction that is transverse to the longitudinal portion and that may be tangential to the perimeter of the rotor at the slot. The shape of the perimeter may be a polygon with rounded corners. The vanes may also include a magnetic portion or a rotating portion.
    Type: Application
    Filed: February 8, 2013
    Publication date: August 8, 2013
    Applicant: Shining Golden Yida Welding & Cutting Machinery Manufacture Ltd.
    Inventor: Shining Golden Yida Welding & Cutting Machinery Manufacture Ltd.
  • Publication number: 20130129547
    Abstract: The invention comprises a rotary engine method and apparatus configured with an exhaust system. The exhaust system includes an exhaust cut or exhaust channel into one or more of a housing or an endplate of the rotary engine, which interrupts the seal surface of the expansion chamber housing. The exhaust cut directs spent fuel from the rotary engine fuel expansion/compression chamber out of the rotary engine either directly or via an optional exhaust port and/or exhaust booster. The exhaust system vents fuel to atmosphere or into a condenser for recirculating of fuel in a closed-loop circulating rotary engine system. Exhausting the engine reduces back pressure on the rotary engine thereby enhancing rotary engine efficiency.
    Type: Application
    Filed: March 8, 2012
    Publication date: May 23, 2013
    Applicant: Fibonacci International, Inc.
    Inventor: Merton W. Pekrul
  • Patent number: 8444404
    Abstract: The invention relates to a hydraulic machine comprising a housing section with a housing, a commutation section and a gear wheel section, the gear wheel section comprising a gear wheel set with an internally toothed gear ring and an externally toothed gear wheel, which engage each other and form working chambers that are connected to at least one inlet connection and at least one outlet connection via the commutation section that comprises a rotary slide valve and a valve plate. It is endeavored to provide such a hydraulic machine that requires only little space. For this purpose, a sealing is arranged between the rotary slide valve and the housing.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: May 21, 2013
    Assignee: Sauer-Danfoss Aps
    Inventors: Henning Lund Larsen, Peter Randlev Larsen
  • Patent number: 8430657
    Abstract: An external gear pump including seals, bearings, bushing/seal housings, choke collars and shafts that are all removable for maintenance and/or replacement without removing either endplate or internals from the case assembly. The preferred pump includes four bearing caps that can be removed without removing the pump from its mounted position. By removing the four bearing caps, access is gained inside the pump housing to all of the seals, bearings, bushing/seal housings, choke collars and most importantly, the drive and idler shafts within the pump housing. Further, the two shafts can be slipped out of the pump without disturbing the internal parts and endplates. This capability facilitates maintenance and replacement of major components without removing the pump from its mounted position.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: April 30, 2013
    Assignee: Roper Pump Company
    Inventors: James K. Simonelli, Michael A. Ingram, Laney A. Seabolt
  • Publication number: 20130064704
    Abstract: A seal member is configured so that an annular rubber member is disposed in an annular storage chamber of a resin annular member. Thus, the rubber annular member is not directly in contact with a drive shaft, and the rubber annular member can be prevented from wearing or peeling without requiring a rotation stopping structure for the seal member. Furthermore, the seal member is provided with first and second communication mouths, so that a brake fluid pressure is applied to compartments obtained by dividing the annular storage chamber using the rubber annular member. Thus, the rubber annular member is pressed, and then is elastically deformed, and accordingly, the resin annular member is expanded by the elastic force. Thus, a self-sealing operation can be performed on the basis of a high pressing force.
    Type: Application
    Filed: May 20, 2011
    Publication date: March 14, 2013
    Applicant: ADVICS CO., LTD.
    Inventors: Yuki Nakamura, Tomoaki Kawabata
  • Patent number: 8388322
    Abstract: A fuel pump for deployment in a fuel system for an internal combustion engine comprises a 3-phase brushless direct current motor, a sling vane impeller with blade-shaped sling vanes, sensorless electronic motor drive and an electronic controller. The controller is adapted to receive analog or pulse-width modulation inputs to control pump speed.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: March 5, 2013
    Assignee: Fluid Control Products, Inc.
    Inventor: Robert E. Scharfenberg
  • Patent number: 8388328
    Abstract: In an inner wall surface of a casing, grooves are formed that correspond to end faces of an outer rotor and an inner rotor, and seal members are disposed within the grooves, the seal members presses against the end faces of the outer rotor and the inner rotor. Inclined portions are provided in sealing portions of resin members of seal members, the sealing portions covering a closed portion. With this configuration, an internal pressure in the closed portion causes the inclined portions to separate from an outer rotor and an inner rotor when a brake fluid pressure within the closed portion increases to the point that the brake fluid is excessively compressed, releasing the brake fluid that is inside the closed portion. It is therefore possible to prevent the brake fluid pressure from increasing excessively within the closed portion.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: March 5, 2013
    Assignees: Advics Co., Ltd., Nippon Soken, Inc.
    Inventors: Takahiro Yamaguchi, Hiroyuki Shinkai, Takutou Takahashi, Kazunori Uchiyama, Naoki Hakamada
  • Publication number: 20130011289
    Abstract: The present invention relates to a compressor or pump unit for the production or flow of compressed fluid and more particularly to a new uniquely designed compressor which has the capabilities to both draw fluid from an intake opening and direct dischargeable compressed fluid to a storage tank utilising a single compressor chamber simultaneously.
    Type: Application
    Filed: November 12, 2010
    Publication date: January 10, 2013
    Applicant: EXODUS R & D PTE LTD
    Inventor: George Flenche
  • Patent number: 8348650
    Abstract: A housing of a Roots pump is configured by joining a lower housing member and an upper housing member that are separable from each other. With the upper and lower housing members joined together, an upper accommodating portion and a lower accommodating portion form a front bearing accommodating portion and a rear bearing accommodating portion, which accommodate whole bearings, respectively. The Roots pump further includes bearing holders attached to the bearings and fixed to the lower housing member so that the bearings are received in the lower accommodating portion in a positioned state.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: January 8, 2013
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Masahiro Inagaki, Shinya Yamamoto, Makoto Yoshikawa, Yuya Izawa
  • Patent number: 8348623
    Abstract: The present invention describes an apparatus (1) and a method for use in regulation of the energy potential in a fluid column located within a pipeline (13), the apparatus (1) including two impellers (2), either one including a rotatable shaft (6) which is provided with a plurality of vanes or plate-shaped blades (8), the impellers (2) being disposed in a housing (4) which constitutes a portion of the pipeline (13), the apparatus (1) communicating with a load (19, 21) and/or an energy source, so that the impellers (2) of the apparatus (1) are arranged to influence the movement of the fluid column within the pipeline (13), the apparatus (1) being arranged to receive the fluid column between the shafts (6) of the impellers (2), the centre axis of said shafts (6) being substantially in the same plane as wall portions of the housing (4) upstream and downstream of the vanes, whereby the rate of the fluid column through the apparatus substantially corresponds to the rate of the fluid column immediately upstream and
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: January 8, 2013
    Assignee: Energreen AS
    Inventors: Jan Kristian Vasshus, Trond Melhus
  • Patent number: 8342828
    Abstract: A pump includes a housing and a shaft rotatable about an axis. The shaft has a shaft diameter and has a portion disposed within the housing. A plurality of retractable vanes is coupled to the shaft and each vane includes a first end that contacts the housing. A seal element is positioned to define a seal between the shaft and the housing. The seal element includes a first bushing, a second bushing, and a dry seal assembly including a wiper that defines a diameter that is smaller than the shaft diameter.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: January 1, 2013
    Assignee: Rapco, Inc.
    Inventor: John L. Wicht
  • Publication number: 20120288391
    Abstract: The present invention relates to a heat engine having a housing. A generally triangular shaped rotor can drive an offset crank as it eccentrically rotates within the housing. Two inlets with valves and two exhausts are provided. The volume between each face of the rotor and the housing defines three expansion chambers. Six power cycles are provided (one by each expansion chamber times two inlets) per revolution of the rotor. Each valve controls the length of time that high pressure gas is allowed to enter each expansion chamber. The valves are controlled by a processor and close when enough pressure is supplied so that the pressures inside and outside the expansion chamber are equal when the chamber is fully expanded just prior to exhaust. Gates can provide a mechanical advantage to the rotor by reducing the amount of pressure applied to the back side of the fulcrum.
    Type: Application
    Filed: May 11, 2012
    Publication date: November 15, 2012
    Inventor: Brian Davis
  • Patent number: 8267677
    Abstract: The invention relates to a gasket part for a pump to be used in conjunction with a bearing part (1) of the pump, through which there is arranged a drive shaft (2). According to the invention, the gasket part includes a mechanical gasket (7) and a detachable part (4) of the drive shaft, which detachable part is arranged substantially in conjunction with the bearing part (1) and can be detachably connected between the other parts (3, 5) of the drive shaft; the gasket (7) is arranged in conjunction with the detachable part (4) of the drive shaft; and the detachable part (4) of the drive shaft includes means (8) for arranging it so as to be compacted in the longitudinal direction. Moreover, the invention concerns a method for detaching the gasket part and use of the gasket part.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: September 18, 2012
    Assignee: Flowrox OY
    Inventor: Jussi Forsström
  • Publication number: 20120224986
    Abstract: A rotary vane compressor includes a cylinder chamber having an ellipsoidal inner wall shape, a rotor rotatably provided in the cylinder chamber, a vane held in the rotor so as to contact with an inner wall surface of the cylinder chamber along with a rotation of the rotor, a vane slot provided on the rotor and offset on a reverse rotational side of the rotor from a radial line passing over a rotational center of the rotor, and a controller for controlling a rotation of the rotor. The controller reversely rotates the rotor for a predetermined time upon activating the compressor. According to the compressor, chattering can be prevented by surely protruding the vane from the vane slot without providing extra parts. In addition, the vane can be produced with easy working processes at low cost.
    Type: Application
    Filed: October 15, 2010
    Publication date: September 6, 2012
    Inventors: Hirotada Shimaguchi, Takashi Kubo, Junichirou Terazawa
  • Patent number: 8257070
    Abstract: A seal apparatus includes at least one pair of gears; a side plate arranged adjacent to the pair of gears; and a housing sandwiching the side plate. At least one of the side plate and the housing includes a shoulder portion. The seal apparatus further includes a seal member arranged between the housing and the side plate and arranged at the shoulder portion. The seal member separates a low pressure area from a high pressure area in a radial direction of the gear. The shoulder portion is located in the low pressure area. At least a part of the seal member faces the high pressure area. The seal apparatus further includes a backup member reinforcing the seal member and facing a tip portion of the shoulder portion; and a containing portion formed between a root portion of the shoulder portion and the seal member to be capable of containing a part of the seal member at least when the seal member is elastically deformed.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: September 4, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Ryohei Maruo, Toshihiro Koizumi, Norihiro Saita
  • Patent number: 8257069
    Abstract: An improved high torque rotary abutment motor is provided that is capable of producing ultra high pressures, while still remaining light weight and reliably efficient. The rotary abutment motor is provided with a body and rotor are sealed in the axial direction with two face spring seals compensating for tolerance and wearing gap. In such a configuration, increasing pressures create increasing force of sealing, thereby allowing operational pressures in excess of what is currently available today.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: September 4, 2012
    Inventor: Yan Satanovskiy
  • Patent number: 8225968
    Abstract: A pump adapted for coupling in a fluid circuit between a source of coating material and a dispensing device. The pump includes an operating member which extends through a pump housing to a location adjacent the fluid circuit. The passage of the operating member to a location adjacent the fluid circuit includes a seal system permit operation of the pump while reducing the likelihood of leakage of the coating material from the circuit out of the housing along the operating member. The seal system includes at least first and second seals defining between them a flushable seal chamber facing a pump chamber containing the coating material being pumped.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: July 24, 2012
    Assignee: Illinois Tool Works Inc.
    Inventors: John F. Schaupp, Martin J. Selmek
  • Patent number: 8215934
    Abstract: A pneumatic vane motor includes a stator with a cylinder, an inlet connectable to a pressure air source and an outlet connectable to an exhaust passage, a rotor journalled in the stator, and an output shaft. The stator has a front opening forming a clearance seal relative to the output shaft and an annular front cover with at least one elastic annular seal element encircling the output shaft at a distance from the clearance seal, wherein a low pressure chamber is formed between the clearance seal and the seal element or elements and communicates with the exhaust passage.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: July 10, 2012
    Assignee: Atlas Copco Tools AB
    Inventors: Sven Olov Roger Edlund, Heino Elmessaar, Johan Fredrik Lindgren, Hans Reinhold Svedman
  • Publication number: 20120164015
    Abstract: A water-lubrication type screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft. The bearing is located on the high pressure side and in this order from the rotor chamber side. the bearing includes a low pressure communicating channel for allowing an outflow space formed on the rotor chamber side with respect to the first non-contact seal to communicate with a low pressure channel for the target gas communicating with a low pressure space inside the rotor chamber or the rotor chamber, a pressurized communicating channel for introducing high-pressure target gas into a pressurized space formed between the first and second non-contact seals, and an open communicating channel through which an open space formed between the second non-contact seal and the lip seal opens to the outside of the casing.
    Type: Application
    Filed: November 22, 2011
    Publication date: June 28, 2012
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Shoji Yoshimura, Toru Noguchi
  • Patent number: 8202070
    Abstract: A positive displacement rotary machine with a body having an internal spherical cavity, a rotor, and a ring working cavity formed by the body and the rotor. The working cavity is functionally divided into bypass and propulsion halves. A separator embodied in the form of a wobble plate is mounted in the working cavity at an angle to the rotor. A piston with a sealable through-slot for the separator passage is mounted in a slot made in the rotor. Multiple openings made through the separator in the propulsion half of the cavity make the separator transparent for the working medium flow. The openings are small enough so the separator seals the through-slot of the piston. The configuration allows for one input port and one output port on the opposite sides of the separator in the bypass half to make the supply steady.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: June 19, 2012
    Inventors: Alexandr Vladimirovich Didin, Ilya Yakovlevich Yanovsky
  • Publication number: 20120141314
    Abstract: The invention relates to a vacuum pump having a cup-shaped housing, a rotor, eccentrically mounted for rotation in the housing, at least one blade mounted in or on the rotor, and a housing cover closing the cup-shaped housing, wherein the rotor has a rotor shaft that passes through the cup-shaped housing and by which the rotor is driven, wherein the rotor shaft is sealed by means of a seal in the housing.
    Type: Application
    Filed: July 14, 2010
    Publication date: June 7, 2012
    Applicant: Joma-Polytec Gmbh
    Inventor: Bernd Hess
  • Patent number: 8192187
    Abstract: A compressor includes a screw rotor and a gate rotor. The screw rotor has a plurality of spirally extending groove portions disposed radially outwardly from the center axis of the screw rotor. The gate rotor has a plurality of tooth portions circumferentially arranged on an outer circumference to engage the groove portions. Preferably, an inclination angle of a groove portion side face contacting the tooth portions is inclined relative to a circumferential direction of the gate rotor varies. Alternatively a first plane contains the screw rotor center axis, a second plane orthogonally intersects the screw rotor center axis, a third plane orthogonally intersects the first and second planes, the gate rotor center axis is on the third plane, and the tooth portions do not overlap the first plane as viewed orthogonally relative to the third plane.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: June 5, 2012
    Assignee: Daikin Industries, Ltd.
    Inventors: Kaname Ohtsuka, Takanori Murono