Piston Ring Or Piston Ring Expander Or Seat Therefor Patents (Class 277/434)
  • Patent number: 10359114
    Abstract: A sealing device includes a seal ring 200 made of resin which is in close contact with a side wall surface on a low pressure side of an annular groove 410, and slides against an inner peripheral surface of a shaft hole in a housing 500 through which a shaft 400 is inserted. A metal spring 300 presses the seal ring 200 toward an outer peripheral surface side, wherein a concave portion 220 is formed on an outer peripheral surface of the seal ring 200 which extends from an end portion on a high pressure side of the outer peripheral surface to a position which does not reach an end portion on a low pressure side of the outer peripheral surface, and introduces a fluid from the high pressure side.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: July 23, 2019
    Inventors: Kazunari Seki, Koji Watanabe
  • Patent number: 10352169
    Abstract: A rotary actuator includes an output shaft, a housing, a piston, and a friction reducer. The housing includes an arcuate bore that extends around the output shaft. The piston is coupled to the output shaft and moved in the arcuate bore. Pressure fluid acts to move the piston. The friction reducer is configured to reduce friction between a peripheral surface of the piston and an inner circumferential surface of the housing forming the arcuate bore.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: July 16, 2019
    Inventors: Koji Ito, Atsushi Fukui
  • Patent number: 10253882
    Abstract: Exemplary oil control rings and methods are disclosed. An oil control ring may include an upper lamella having a first outer radial surface and a lower lamella having a second outer radial surface. An expander ring is in communication with the upper lamella and the lower lamella and generates an expander radial outward force on the lamellas. At least one of the first outer radial surface and the second outer radial surface is comprised of a first contact section and a first tapered section. The first tapered section is configured to generate a first radially inward force greater than or equal to the expander radial outward force when moved in a first direction and a second radially inward force less than the expander radial outward force when moved in a second direction.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: April 9, 2019
    Assignee: Mahle International GmbH
    Inventors: Steven J. Sytsma, Thomas J. Smith
  • Patent number: 9791831
    Abstract: An image forming apparatus includes: an exhaust fan which has a pipe portion; and a duct. One of the pipe portion and the exhaust duct is inserted and fitted into the other such that they are connected to each other. A band-shaped seal member is attached to the entire outer circumference of the pipe portion. Both end portions of the seal member overlap each other in the circumferential direction of the pipe portion and are located a predetermined gap apart in an axial direction. The end portion of the seal member on the side of connection of the pipe portion has a non-fixed portion which is extended a predetermined length from a tip end in the circumferential direction and which is not fixed to the pipe portion, to reliably prevent an air leakage from a connection portion in a fan and a duct.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: October 17, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventor: Takumi Michibata
  • Patent number: 9702382
    Abstract: A spindle of an oil hydraulic cylinder includes a main body and a circular ring shaped copper coat. The main body defines a central axis and has a large diameter segment and a small diameter segment integrally extended from the large diameter segment. The copper coat is brazed on an outer surface of the large diameter segment. The center of the copper coat is arranged at the central axis, and the radius of the spindle is greatest at a portion of the spindle coated by the copper coat. The abrasion resistance of the copper coat is greater than the abrasion resistance of the main body. Thus, the spindle of the instant disclosure is a composite structure and is provided for reducing abrasion. Additionally, the instant disclosure also provides an oil hydraulic cylinder.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: July 11, 2017
    Inventors: Kun-Shan Hsu, Mike S.C. Cheng
  • Patent number: 9581154
    Abstract: A piston with an integrated heat exchanger comprises a seal, a piston hub and a piston rod. The piston hub is further provided with a coolant reservoir and an outlet nozzle at its lateral surface. The heat exchanger integrated into the piston hub and/or the piston hub include a coolant manifold, a coolant passage communicating thereto, and a plurality of channels connecting to the coolant manifold and extending radially to the annulus. Said heat exchanger provides enhanced efficiencies of heat-exchange and debris-flushing.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: February 28, 2017
    Inventors: Jianke Wang, Mengzhen Zhang, Edwin C. Lewis, II
  • Patent number: 9394927
    Abstract: A hydraulic oil cylinder has a buffer sleeve (4), a rodless cavity sealing end face (1-2) and at least one throttle oil channel (3-1). The buffer sleeve (4) is sleeved on an additional section (3a) of a piston rod in the rodless cavity (2-2) and axially slidable along the additional section (3a) of the piston rod. The rodless cavity sealing end face (1-2) is provided in an oil cylinder cavity between a rodless cavity oil passing hole (1-1) and the termination of the rodless cavity end face of the piston for the retraction process of the piston rod (3), and enables to block the buffer sleeve (4) and attach to the first end surface (4-1) of the buffer sleeve thereby forming a sealing surface.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: July 19, 2016
    Assignees: Hunan Sany Intelligent Control Equipment Co., Ltd., Sany Heavy Industry Co., Ltd.
    Inventors: Xiaogang Yi, Yongdong Liu, Bingbing Chen
  • Patent number: 9309784
    Abstract: A positioning arrangement (142), including: an outer casing having a frame member (78); a low pressure steam turbine inner casing (140) having an appendage (60) and a threaded hole through the appendage; and an alignment constraint (10) configured to be positioned in the threaded hole and define a positional relationship between the inner casing and the frame member. The alignment constraint includes a main body (14) and a discrete piggyback body (16), both configured to rotate in the threaded hole as a unitary body when in a joined, end-to-end configuration.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: April 12, 2016
    Assignee: SIEMENS ENERGY, INC.
    Inventors: Robert F. Wasileski, III, Ira J. Campbell, Johnny R. Dickson
  • Patent number: 9133788
    Abstract: A reciprocating engine is so arranged that, in an initial period of an expansion stroke, a high-pressure combustion gas above a piston is introduced via gas passage holes provided in an upper portion of a cylinder inner surface on a thrust side into a gas chamber defined by the cylinder inner surface and a top ring, a second ring, and a second land of the piston, so as to support the piston from the thrust side by the introduced high-pressure combustion gas. A half ring is inserted in the gas chamber in a state of being placed on the second land from the thrust side and so as to be movable up and down with clearances above and below, whereby as the piston reciprocates, the half ring moves up and down an amount corresponding to the size of the clearances, thereby continually cleaning the inside of the gas chamber.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: September 15, 2015
    Assignee: BANDO KIKO CO., LTD.
    Inventor: Shigeru Bando
  • Patent number: 9109699
    Abstract: A structure for mounting a piston ring mounted around a piston head of a piston is provided. The structure includes a ring groove formed along the piston head with a guide recess circumferentially formed in the ring groove in a certain section. The piston ring is rotatably fitted into the ring groove. A guide protrusion is formed on the piston ring and is provided in the section of the guide recess such that the guide protrusion is rotated within the section. The structure is configured such that when a plurality of piston rings is mounted around the piston head, rotation sections of the end gaps of the piston rings are not aligned with each other.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: August 18, 2015
    Inventors: Mun Hwee Jang, Jin Tae Kim, Yeon Ho Shin
  • Publication number: 20150130143
    Abstract: An oil scraper piston ring and a method for producing it in which a base body is provided with a running surface profile by machining the radially outer circumferential surface thereof, the running surface profile including two running surface lands and an interposed groove, wherein the running surface profile corresponds to that of the finished oil scraper piston ring, and on the groove side, seen in the circumferential direction, drainage holes are introduced into the groove base, at least the running surface lands are provided with a wear-resistant PVD, DLC or TaC layer and, if needed, the wear-resistant layer is subjected to a polishing, honing or lapping operation.
    Type: Application
    Filed: April 25, 2013
    Publication date: May 14, 2015
    Inventors: Klaus Meyer, Dirk Baerenreuter
  • Patent number: 9027933
    Abstract: An engine in which an oil consumption and a leakage of blow-by gas can be stably reduced for a long period of time. The engine includes a first land (3), a first ring groove (4), a second land (5), a second ring groove (6), a third land (7), a third ring groove (8), and a piston skirt (9) formed on a piston peripheral wall (1) in the above-recited order from a side of a piston head (2). A first pressure ring (10) is fitted in the first ring groove (4). A second pressure ring (11) is fitted in the second ring groove (6), an oil ring (12) fitted in the third ring groove (8), and an indentation (13) is formed at the second land (5).
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: May 12, 2015
    Assignee: KUBOTA Corporation
    Inventors: Hiroki Kuwayama, Takahiro Yamazaki, Yutaka Ishigaki, Hideyuki Koyama, Manabu Miyazaki, Yoshinori Tanaka, Keita Naito, Hidetaka Morinaga
  • Publication number: 20150061230
    Abstract: A piston assembly for a nailer is provided, and includes a piston body with an upper surface, a lower surface and a peripheral edge. A peripheral gland is located between the upper and lower surfaces, the gland having an inner closed end and defining an annular space. An annular piston seal is disposed in the gland, and a plurality of spaced air ports are disposed adjacent the peripheral edge, the ports each being in fluid communication with the gland. The gland and the seal are dimensioned so that during a power cycle of the nailer, pressurized air generated during a fastener driving stroke enters the ports and radially expands the seal for enhancing friction between the seal and a surrounding cylinder. During a return stroke, the seal is radially retracted within the gland to reduce friction between the seal and the cylinder.
    Type: Application
    Filed: August 13, 2014
    Publication date: March 5, 2015
    Inventor: Nathan Thomas Mina
  • Publication number: 20150041693
    Abstract: A solenoid actuated valve (10) holds pressure and volume of an accumulator with low leakage and provides low actuation drag during a release stroke for dumping fluid contents of the accumulator at very low current draw. Two elongate valve members (10a, 10b) are assembled to be movable axially relative to one another with a gland or groove (10c) formed in one of the two valve members (10a). An o-ring (12) located within the groove (10c) is in a non-contacting relationship to the other valve member (10b) when in a non-energized state. An energizer ring (14) located within the groove (10c) can reciprocate axially with respect to the o-ring (12). The energizer ring (14) moves axially toward the o-ring (12) in response to fluid pressure against a surface (14a) of the energizer ring (14) opposite from the o-ring (12) to axially compresses the o-ring (12), causing the o-ring (12) to expand radially outwardly into sealing contact with the other valve member (10b).
    Type: Application
    Filed: March 7, 2013
    Publication date: February 12, 2015
    Inventors: Michael E. Jones, Jeffrey J. Waterstredt
  • Publication number: 20150010341
    Abstract: A lockable joint such as a lockable ball-and-socket joint comprising a first arm having a swivel head and a socket, the swivel head being pivotably mounted to the socket, and a locking device arranged for locking the swivel head with respect to the socket, the locking device having a piston, a pressure gas source, and an actuating device arranged for reversibly disconnecting the piston from the pressure gas source where in the pressure gas source is a gas cartridge. A seal suitable at a wide range of temperatures and pressures can be used with at least the pressure gas source.
    Type: Application
    Filed: July 26, 2013
    Publication date: January 8, 2015
  • Publication number: 20140346737
    Abstract: A piston seal assembly including a piston, plate, and seal is provided. The piston is slidably supported on a shaft or in a housing, and includes a recess on an inner or outer radial portion. The plate is fastened to the piston and extends at least partially adjacent to the recess. The seal is located at least partially within the recess of the piston. The seal includes a radial sealing surface that engages the shaft or the housing, and the seal is axially movable between the piston and the plate via hydraulic fluid pressure.
    Type: Application
    Filed: April 28, 2014
    Publication date: November 27, 2014
    Applicant: Schaeffler Technologies GmbH & Co. KG
    Inventors: Joshua David Harris, Brian Zaugg
  • Publication number: 20140339777
    Abstract: The present invention provides a gasket for syringes which can be stored for a long time without any chemical liquid leakage. The present invention relates to a gasket for syringes, including a film laminated to a surface of the gasket, the film having a liquid-contacting portion and a sliding portion, the liquid-contacting portion being thicker than the sliding portion. Preferably, the liquid-contacting portion has a thickness at least 1.2 times the thickness of the sliding portion.
    Type: Application
    Filed: April 30, 2014
    Publication date: November 20, 2014
    Inventors: Hiroaki NAKANO, Eiji YAO, Shinya IWANO, Naoyuki ISHIDA
  • Publication number: 20140326131
    Abstract: In a piston-ported engine, a sealing ring may be placed in a groove in the cylinder. As the groove is of greater diameter than the cylinder, the sealing ring overlaps into a helix allowing it to be enter the cylinder. However, such a helix does not fit into a groove without when in the helix. Alternatively, a shorter sealing ring is placed into the groove. However, the gap is too large. According to one embodiment, a groove of double the width of the ring is provided and the helical ring is installed and caused to unwind in the groove so that the ring sits in a plane. A spacer ring is placed in the groove to fill the extra space in the groove. An elastomeric material or a tension spring in an outer groove in the sealing ring can be used to cause the ring to press against the piston.
    Type: Application
    Filed: May 2, 2014
    Publication date: November 6, 2014
    Applicant: EcoMotors, Inc.
    Inventors: Peter Hofbauer, Diana Brehob
  • Patent number: 8876115
    Abstract: A three-piece oil control ring is provided for use in a piston groove of an internal combustion engine. The ring comprises a first annular segment and a second annular segment, associated to an expanding element. The expander has a substantially annular shape and comprises a first end facing the internal wall of the groove when the ring is mounted on the piston and a second opposite end. The ring further comprises an intermediate portion having at least one protrusion for association with the segments. Still further, the first end exhibits first thickness value (E1), the second end exhibits second thickness value (E2) and the substantially intermediate portion exhibits third thickness value (E3), wherein the value of (E1) is substantially lower than the value of (E3) and lower or similar to the value of (E2), the difference between (E1) and (E3) being substantially higher than that between (E1) and (E2).
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: November 4, 2014
    Assignees: MAHLE Metal Leve S/A, MAHLE International GmbH
    Inventors: Andre Ferrarese, Rafael Antonio Bruno
  • Publication number: 20140290619
    Abstract: A piston assembly for use in an internal combustion engine is provided by the present disclosure. The piston assembly includes a piston body having an extended piston mantel, a piston face, an internal cavity, and a wrist pin support. Two oil retainer seals are located concentrically about the extended piston mantel near a distal end, each oil retainer seal having an internal groove and being formed of a polymer material. Two compression clips are disposed within the internal grooves of the two oil retainer seals and are adapted to assist the oil retainer seals in establishing contact with an inner wall of a cavity in a cylinder of the internal combustion engine. The piston body is formed of an engineered composite material.
    Type: Application
    Filed: June 13, 2014
    Publication date: October 2, 2014
    Inventor: Heinz-Gustav A. Reisser
  • Patent number: 8844937
    Abstract: An annular sealing device for a shaft and housing that can maintain sealing properties under fluid pressure load when creep occurs in a cut portion due to thermal expansion and the perimeter is shortened. The sealing device includes a seal ring unit configured to fit within an annular groove in the shaft, and has, on the side thereof where the outer periphery is located, a sliding surface on which the seal ring unit slides on the housing; and a lip portion on the inner periphery of the seal ring. The lip portion of tip is disposed on the side of the annular groove where a groove bottom thereof is located, in such a way that the tip thereof is deformable in a direction in which the tip increases the distance between the seal ring unit and the groove bottom of the annular groove when under pressure.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: September 30, 2014
    Assignee: NOK Corporation
    Inventor: Koji Watanabe
  • Publication number: 20140265148
    Abstract: The invention provides a low tension piston ring having a finished outer diameter and negligible tangential tension. The method includes the steps of machining a stock bar to an initial outer diameter slightly greater than the finished outer diameter of the piston ring, finishing the initial outer diameter of the stock bar to a rounded profile having a nominal diameter equal to the finished outer diameter, and machining the stock bar to the preferred cross-section. Dykes-type piston rings can have keystone or semi-keystone shaped cross-sections. The method continues by detaching the piston ring from the stock bar using a parting tool in response to completing all tension inducing operations including the steps recited above. The method continues with the steps of lapping the piston ring to a final longitudinal thickness and cutting the piston ring longitudinally to form a final gap.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Inventors: Gregory Salenbien, Miguel Azevedo, Matthew Belford
  • Publication number: 20140265140
    Abstract: Exemplary pistons and oil control ring assemblies are disclosed, along with methods of making and using the same. An exemplary piston assembly includes a main body defining an outer circumferentially disposed groove, and an oil control ring assembly selectively disposed within the outer circumferentially disposed groove. The oil control ring assembly may include upper and lower oil control rails selectively disposed within the piston groove, each having a respective seal surface configured to seal against a piston bore surface of an engine. The oil control ring assembly may further an expander selectively disposed in the groove. The expander may be configured to push the upper and lower oil control rails radially outward to contact the piston bore surface. The upper and lower oil control rings may define different radial widths.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: Mahle International GmbH
    Inventor: Steven J. Sytsma
  • Patent number: 8827276
    Abstract: A sliding member for an internal combustion engine includes: a substrate and a coating obtainable by thermally spraying a powder, having the element proportions of 55 to 75 wt % of chromium, Cr; 3 to 10 wt % of silicon, Si; 18 to 35 wt % of nickel, Ni; 0.1 to 2 wt % of molybdenum, Mo; 0.1 to 3 wt % of carbon, C; 0.5 to 2 wt % of boron, B; and 0 to 3 wt % of iron, Fe.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: September 9, 2014
    Assignee: Federal-Mogul Burscheid GmbH
    Inventors: Marcus Kennedy, Michael Zinnabold, Marc-Manuel Matz
  • Patent number: 8770590
    Abstract: An oil scraper piston ring includes a ring body having two radial outer running webs on the ring body, which are arranged one behind the other in relation to the run direction of the piston and are spaced apart from one another by an external depression. Each running web respectively has two scraper lips and a wear protection coating is provided on each scraper lip.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: July 8, 2014
    Assignee: Federal-Mogul Burscheid GmbH
    Inventor: Peter Esser
  • Patent number: 8746701
    Abstract: A piston assembly includes an annular body defining a groove, with a ring disposed within the groove. The piston assembly includes a centering device disposed within the groove between an inner face of the ring and a root of the groove. The centering device centers the ring concentrically within the groove when the ring is in an uncompressed condition, prior to installation into a bore of an engine block, to prevent the inner face of the ring from moving radially outward beyond an outer edge of the groove when the ring is in the uncompressed condition.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: June 10, 2014
    Assignee: GM Global Technology Operations LLC
    Inventor: Terry A. Tomas
  • Publication number: 20140117626
    Abstract: To provide a price-competitive compression ring having excellent thermal conductivity and thermal sag resistance, which can be used in a high-thermal-load environment of high-compression-ratio engines, steel identified by the material number of SKS93 in JIS G 4404 is used, and a piston ring wire is annealed before an oil-tempering treatment such that spheroidal cementite having an average particle size of 0.1-1.5 ?m is dispersed in a tempered martensite matrix.
    Type: Application
    Filed: June 21, 2012
    Publication date: May 1, 2014
    Inventor: Yuji Shima
  • Publication number: 20140090554
    Abstract: A seal assembly for a reciprocating piston system is provided that compensates for uneven wear rates between the ring components of the seal assembly by initially sizing a portion of the width of the sealing ring larger than the width of the annular recess in the cover ring, this portion at least partially overlapping the gap in the cover ring but not the gap in the sealing ring.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Applicant: Air Products and chemicals, Inc.
    Inventors: David Jonathan Chalk, Larry Thomas Stein
  • Publication number: 20140000549
    Abstract: A compression ring for an engine is disclosed. The compression ring may have a cylindrical body having an outer surface, and a central opening formed within the cylindrical body and concentric with the outer surface of the cylindrical body. The cylindrical body may have a radial dimension from the central opening to the outer surface that is about 1.1 to 1.3 times as long as an axial dimension of the cylindrical body.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Inventors: Frank Matthew Graczyk, Aaron Gamache Foege, Farhan Ferozali Devani, Edward John Cryer, David Edward Burrell Stone
  • Publication number: 20130334774
    Abstract: A structure of a titanium-alloy piston ring is configured to be installed in an engine and includes a titanium-alloy matrix. The titanium-alloy matrix has an outer periphery receiving a hardening treatment (such as receiving a nitrogen treatment, or being coated with a diamond-like carbon film, or receiving a nitrogen treatment and then being coated with a diamond-like carbon film), so as to make the piston ring have improved abrasion-resistant strength, hardness, and wear resistance, thereby extending the normal service life of the piston ring.
    Type: Application
    Filed: March 7, 2013
    Publication date: December 19, 2013
    Inventor: Wan-Jie Lu
  • Patent number: 8597797
    Abstract: [Task] The chromium nitride ion-plating coating has a property that it is hard but is liable to peel off. Year by year, the required level of wear resistance and scuffing resistance becomes higher in a diesel engine. The property of a coating is improved to enhance the wear resistance and scuffing resistance and also to improve resistance against peeling off. [Means for Solution] (1) Composition is mainly composed of chromium, nitrogen, and carbon, and the concentration of carbon relative to the total concentration of the main components is from 4 to 8% by weight. (2) The crystal structure is that texture of the CrN (111) plane orientation is from 0.4 to 2.0 in terms of a CrN (111) structural coefficient. (3) Vickers hardness is from Hv 1600 to Hv 2000.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: December 3, 2013
    Assignee: Kabushiki Kaisha Riken
    Inventors: Takuma Sekiya, Terushige Ueda, Yuji Shima, Shigeo Inoue
  • Publication number: 20130313774
    Abstract: An objective of the present invention is to provide a sliding member for sheet-shaped recording material detachment having superior resistance to abrasion and superior heat resistant rigidity, and either a seal ring for an automobile or a seal ring or a sliding member for an industrial gas compressor, having high mechanical strength while ensuring flexibility. The objective is achieved with a sliding member for sheet-shaped recording material detachment, and either a seal ring for an automobile or a seal ring or a sliding member for an industrial gas compressor, made from a resin composite comprising: as a first element, either an adhesive fluorocarbon resin (A) or a resin compound of the resin (A) and a fluorocarbon resin (B) which differs from the resin (A), which are in a volumetric ratio (AB) of 5/95 to 99/1; and as a second element, 0.5 to 99 volume % of a thermoplastic polyimide (C).
    Type: Application
    Filed: November 10, 2011
    Publication date: November 28, 2013
    Inventors: Eiichi Nishi, Takashi Sato, Hiroyoshi Uejima, Tomokazu Ichikawa, Toru Hashimoto, Shinya Kikutani, Kazuhiro Mizutani, Ryo Hisano
  • Publication number: 20130307220
    Abstract: The oil control ring (2) extends in a circumferential direction (2x) about a center (2l) and has a longitudinal axis (2m) that passes through the center (2l), wherein the oil control ring (2) has an end face (2d) that faces the center (2l), and wherein the oil control ring (2) has a first lateral surface (2s), a second lateral surface (2t), and an outer surface (2u) facing away from the center (2l), wherein the oil control ring (2) has a plurality of channels (2c) extending toward the center (2l) on the first lateral surface (2s), said channels being arranged at mutual distances in the circumferential direction (2x) and extending over the entire width of the first lateral surface (2s) in the radial direction and thereby forming a fluid-conducting connection between the end face (2d) and the outer surface (2u), and wherein crown parts (2i) extending in the circumferential direction (2x) are arranged between pairs of channels (2c), wherein each crown part (2i) protrudes beyond the respective channel (2c) in the
    Type: Application
    Filed: January 23, 2012
    Publication date: November 21, 2013
    Inventor: Norbert Feistel
  • Publication number: 20130307221
    Abstract: A piston ring, in particular a compression piston ring, includes a main body, which has a radially outer running surface, a radially inner circumferential surface, an upper and a lower flank surface, and a joint, wherein the ruining surface is provided with at least one circumferential recess which receives a wear-resistant coating, in particular a PVD coating, and wherein, starting from respective end faces of the joint, as seen in the circumferential direction of the main body, a land Shoulder is integrally formed on the main body outside the coating and extends at a predetermined radial height over a predetermined circumferential length on both. sides of the joint.
    Type: Application
    Filed: January 9, 2012
    Publication date: November 21, 2013
    Inventor: Peter-Klaus Esser
  • Publication number: 20130274367
    Abstract: Provided are: surface modification method for imparting slidability to surface of elastic body such as vulcanized rubber or thermoplastic elastomer without using expensive self-lubricating resin; surface-modified elastic body with polymer brush formed on its surface; and gasket for injector and injector formed of surface-modified elastic body. The surface modification method applies to surface of thermoplastic elastomer or vulcanized rubber.
    Type: Application
    Filed: December 26, 2011
    Publication date: October 17, 2013
    Inventors: Yasuhisa Minagawa, Yasuhiko Kondo, Tetsuo Mizoguchi, Atsushi Takahara, Motoyasu Kobayashi
  • Patent number: 8555850
    Abstract: A compression ring assembly for a piston of an internal combustion engine includes a first compression ring and a second compression ring, with the second compression ring overlaid adjacent to and in abutting engagement with the first compression ring. When both the first compression ring and the second compression ring are uncompressed and in a free state, the second compression ring includes an outer second ring diameter that is greater than an outer first ring diameter of the first compression ring. Additionally, the first compression ring includes a first radial width that is greater than a second radial width of the second compression ring. A first gap of the first compression ring is positioned relative to a second gap of the second compression ring in a non-overlapping orientation.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: October 15, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Zheng Ma, John B. Fisher, Kenneth E. Schroeder
  • Patent number: 8517679
    Abstract: The piston ring sealing points of a sealing apparatus between the rotor and the housing of a continuous-flow machine each have a piston ring, a cylindrical contact surface, which is directed radially inward, on the housing, as well as an axial stop on the rotor. In this case, the piston ring of the outer piston ring sealing point has a larger external radius and a smaller internal radius than the piston ring of the inner piston ring sealing point. At the same time, the outer piston ring sealing point has a smaller internal radius than the inner piston ring sealing point. Because of the V-shaped arrangement concept, there is no need for a steel ring, shrunk onto the rotor, between the piston ring sealing points.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: August 27, 2013
    Assignee: ABB Turbo Systems AG
    Inventors: Joel Schlienger, Patrick Aberle
  • Patent number: 8517230
    Abstract: A valve for controlling a flow of granular material and fluid comprises a body having a first end, a second end, and defining an interior surface. An inlet is formed proximate the first end for receiving the granular material and fluid. An outlet is formed downstream of the inlet for selectively discharging the granular material and fluid. A first member is slideably captured within the body and a resilient member is operationally coupled to the first member. The first member is moveable between an open position at which the granular material and fluid flow through the outlet, and a closed position upstream of the outlet at which the granular material is substantially prevented from flowing through the outlet. The resilient member is moveable between a retracted position and an expanded position at which it is engaged with the interior surface to substantially prevent the fluid from flowing through the outlet.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: August 27, 2013
    Assignee: CNH Canada, Ltd.
    Inventor: Russell James Memory
  • Publication number: 20130213222
    Abstract: A piston ring for sealing a cylinder wall to a piston body is provided. The piston ring includes a ring body of an elastically deformable material which extends substantially circumferentially around an axis and has an inner face that faces the axis. The inner face includes a plurality of axially spaced and radially inwardly extending contact features. The ring body configured to bias the contact features into engagement with the piston body to establish a seal therebetween. At least one of the contact features extends substantially continuously around a circumference for establishing a substantially continuous seal around the piston body, and at least one of the contact features is non-continuous and has at least one recessed area for allowing the passage of oil and gas therethrough.
    Type: Application
    Filed: February 15, 2013
    Publication date: August 22, 2013
    Applicant: Federal-Mogul Corporation
    Inventor: Federal-Mogul Corporation
  • Publication number: 20130213219
    Abstract: A power cylinder assembly for an internal combustion engine is provided. The power cylinder assembly includes a cylinder wall having a channel formed therein and a piston body with a skirt. A piston ring is seated within the channel of the cylinder wall and is sealed against the skirt of the piston body. Specifically, the piston ring has a ring body with an inner face that presents two radially inwardly extending ridges spaced axially from one another by a valley region, and the outer face presents a groove which receives a spring to bias the ridges into sliding engagement with the outer surface of the skirt of the piston body. The ring body also has at least one oil drainage port which extends radially between the valley region of the inner surface and the groove of the outer face for conveying oil from between the ridges into the groove.
    Type: Application
    Filed: February 15, 2013
    Publication date: August 22, 2013
    Applicant: Federal-Mogul Corporation
    Inventor: Federal-Mogul Corporation
  • Publication number: 20130213220
    Abstract: A piston ring for sealing a cylinder wall to a piston body is provided. The piston ring includes a ring body that extends about an axis and has inner and outer faces. The inner face presents a pair of ridges that extend in a radially inward direction, and the outer face presents a groove. A spring of an elastomeric material substantially circumferentially surrounds the ring body and is seated in the groove on the inner face. The spring biases the ring body in the radially inward direction to seal the ridges against the piston body. The ring body also has at least one oil drainage port which extends at an angle relative to the radially inward direction from the inner face to a location on the outer face on one axial side of the spring for conveying oil out of a space between the ridges.
    Type: Application
    Filed: February 15, 2013
    Publication date: August 22, 2013
    Applicant: Federal-Mogul Corporation
    Inventor: Federal-Mogul Corporation
  • Publication number: 20130207350
    Abstract: An engine in which an oil consumption and a leakage of blow-by gas can be stably reduced for a long period of time. The engine includes a first land (3), a first ring groove (4), a second land (5), a second ring groove (6), a third land (7), a third ring groove (8), and a piston skirt (9) formed on a piston peripheral wall (1) in the above-recited order from a side of a piston head (2). A first pressure ring (10) is fitted in the first ring groove (4). A second pressure ring (11) is fitted in the second ring groove (6), an oil ring (12) fitted in the third ring groove (8), and an indentation (13) is formed at the second land (5).
    Type: Application
    Filed: February 6, 2013
    Publication date: August 15, 2013
    Inventor: KUBOTA Corporation
  • Publication number: 20130193648
    Abstract: A piston ring exhibiting particles capable of wear resistance on its shoulder is produced by producing a melt of the base materials of a metal material, adding ceramic particles to the melt, pouring the melt into a prefabricated mould and cooling the melt. During cooling, the mould is aligned such that the ceramic particles gather on at least one of the piston ring shoulders.
    Type: Application
    Filed: July 19, 2011
    Publication date: August 1, 2013
    Inventors: Richard Mittler, Laszlo Pelsoeczy
  • Publication number: 20130192458
    Abstract: A sliding element, in particular a piston ring or a cylinder liner, comprising at least one a-C:H:Me layer, where Me is germanium and silicon, having a layer thickness of 10-40 ?m, is provided.
    Type: Application
    Filed: May 24, 2011
    Publication date: August 1, 2013
    Inventors: Steffen Hoppe, Marcus Kennedy, Manfred Fischer, Michael Zinnabold, Robert R. Aharonov
  • Publication number: 20130174726
    Abstract: A piston ring has a body member for sitting in a ring groove of a piston. The body member has an inner periphery, upper wall, lower wall and an outer periphery. The outer periphery has a concavity therein for storing lubricant therein. The upper wall has an outer section proximate to the outer periphery is constructed to be resiliently flexible between a flexed and unflexed position such during a portion of a power stroke, the volume of the concavity to store the lubricant is decreased by the flexing of the upper wall to the flexed position for expelling lubricant therefrom to a wall of the cylinder. The wall resiliently returns to the unflexed position during other times to allow excess lubricant from the wall of the cylinder to pass into the concavity.
    Type: Application
    Filed: January 11, 2012
    Publication date: July 11, 2013
    Inventor: Gregory Mordukhovich
  • Publication number: 20130154196
    Abstract: A piston ring is formed from a ring blank, e.g., a wire, that has a cross sectional profile including upper and lower surfaces that are generally parallel and disposed between inner and outer peripheral faces. The cross sectional profile also includes a hook area at the outer portion of the lower surface that includes a nose area. The nose area is provided with a radius that is as sharp as possible, and is disposed such that a grinding operation performed on the lower surface, e.g., with a single generally planar grinding surface, will also grind the nose area, thereby truncating the nose area and increasing sharpness of the nose area without having to perform additional machining operations.
    Type: Application
    Filed: December 4, 2012
    Publication date: June 20, 2013
    Inventor: Mahle International GmbH
  • Publication number: 20130134680
    Abstract: A piston ring formed of cast iron provides improved machinability and exceptional performance and minimum costs. The cast iron includes 2.2 to 2.9 wt. % carbon, 3.2 to 4.2 wt. % silicon, 0.75 to 1.25 wt. % copper, 1.0 to 1.5 wt. % manganese, 0.09 to 0.15 wt. % sulfur, not greater than 0.2 wt. % phosphorous, and an average carbon equivalent of 3.8. The cast iron preferably includes a matrix of martensite with MnS and carbides dispersed therein. The matrix is also preferably free of ferrite, austenite, and steadite. The cast iron is formed by casting, autenitizing, quenching, and tempering the alloy.
    Type: Application
    Filed: November 29, 2012
    Publication date: May 30, 2013
    Inventor: Heron Gekonde
  • Publication number: 20130119614
    Abstract: COMPENSATIVE AND SEALING RINGS FOR PISTONS OF ENGINES, COMPRESSORS, EXHAUSTERS AND PUMPS, invention patent for piston rings according to the title, being the compensative subdivided in models AC1 (picture 1), AC2 (picture 6), AC3 (picture 12) and AC4 (picture 15), characterized by indents and saliencies or bosses that fit on their ends (pictures 1 and 6) and overlays (composed rings as seen in pictures 1, 6, 12 and 15), and the Sealing Rings subdivided in models AVCE1 (picture 20), AVCE2 (picture 27), AVCE3 (picture 33), AVCE4 (picture 40), AVCE5 (picture 45) and AVCE6 (picture 53), characterized by fitting in built-in grooves unified to the conventional, thus sealing the oil and gases escape. They are endowed with self-propulsive force or are impelled or driven by the propelling spring ring.
    Type: Application
    Filed: May 8, 2012
    Publication date: May 16, 2013
    Inventor: Jairo Antunes De Oliveira
  • Publication number: 20130075977
    Abstract: Disclosed is a piston ring for an engine and a method of manufacturing the piston ring. The piston ring includes at least a Cr (Chromium) coating layer coated on a surface of a base material, and a Si-DLC (Silicon doped Diamond Like Carbon) coating layer coated on an outermost layer above the Cr layer and the base material. More specifically, the Si-DLC layer includes about 3 to 10 wt. % of Si.
    Type: Application
    Filed: December 12, 2011
    Publication date: March 28, 2013
    Inventor: Jeong Uk An
  • Patent number: 8403334
    Abstract: A piston ring assembly includes a ring or rail defining a seal surface configured to seal against a piston bore surface of an engine. The seal surface defines a radially outer periphery. The oil control rail assembly further includes two positioning rings. A first one of the positioning rings is disposed axially above the oil control rail and a second one of the positioning rings is disposed axially below the oil control rail. Each of the positioning rings defines an outermost periphery of the positioning ring that is disposed radially inward with respect to the seal surface of the oil control rail. The outermost peripheries of the positioning rings thus generally do not contact a bore surface that is contacted by the seal surface of the oil control rail.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: March 26, 2013
    Assignee: Mahle Engine Components USA, Inc.
    Inventor: John C. Lahrman