Split Single Piece Piston Ring Having Opposed Asymmetrical Mirrored Ends Patents (Class 277/496)
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Patent number: 11542819Abstract: A gas turbine engine rotor assembly, comprising: a shaft about an axis having an outer surface radially outward and a groove radially into the outer surface; a disc surrounding the shaft rotatable with the shaft about the axis, the disc having an inner surface extending axially defining an inner diameter, having a disc profile around the groove and axially away from and radially inwardly of the inner diameter, the shaft and the disc defining a gap circumscribed outwardly by the inner diameter and inwardly by the outer surface; and a seal including a split ring fitted into the groove and rotatable with the shaft about the axis, the ring having a ring profile complementary to the disc profile, the ring resiliently expandable radially in the gap to the inner diameter, the disc profile cooperable with the ring profile to axially load the shaft via the ring expanded across the gap.Type: GrantFiled: February 17, 2021Date of Patent: January 3, 2023Assignee: PRATT & WHITNEY CANADA CORP.Inventor: Jeffrey Bernard Heyerman
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Patent number: 10648567Abstract: The present disclosure relates generally to seal rings useful in rotating systems such as automobile transmissions, torque converters and automatic clutches. In one embodiment, the disclosure provides a seal ring in which the first end includes a platform in a radially inward portion of each lateral region thereof, and a vertically-extending blade in a radially outward portion of its central region; and the second end of the seal ring has two vertically extending fingers in a radially outward portion of each lateral region thereof, and a platform in a radially inward portion of its central region. When the ends are engaged, a portion of the extension of the blade is disposed radially directly over the central platform, a portion of each finger is disposed radially directly over a lateral platform, and the blade of the central region of the first end is disposed between the fingers.Type: GrantFiled: January 9, 2018Date of Patent: May 12, 2020Assignee: SAINT-GOBAIN PERFORMANCE PLASTICS L+S GMBHInventor: Mirco Gronitzki
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Patent number: 10309539Abstract: The present invention provides a seal ring capable of maintaining excellent low torque generation performance for a long term. A seal ring (1) is mounted on an annular groove formed on one member consisting of either a housing having a shaft hole or a rotary shaft inserted into the shaft hole, partly projects from the annular groove and contacts a surface of other member consisting of either the housing or the rotary shaft, and slidably contacts a side wall surface of the annular groove at a non-sealed fluid side thereof, thereby sealing an annular gap between the one member and the other member. An outer diameter side (2a) of the side surface (2) of the ring to be subjected to at least the side wall surface of the annular groove is formed as an inclined surface having an inclined angle in such a way as to decrease a width of the ring from the outer diameter side of the side surface of the ring to an inner diameter side of the side surface thereof.Type: GrantFiled: September 30, 2015Date of Patent: June 4, 2019Assignee: NTN CORPORATIONInventors: Kohzoh Kakehi, Takumi Kondou
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Publication number: 20150107796Abstract: A wear ring for a piston of a die-casting apparatus comprises an annular body having a gap extending therethrough. The gap is configured to define at least two circumferentially offset pairs of circumferentially spaced apart facing surfaces. The facing surfaces of each pair are angled and configured to contact each other in a flush manner when the wear ring is circumferentially compressed.Type: ApplicationFiled: October 17, 2014Publication date: April 23, 2015Inventor: Paul Henry Robbins
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Patent number: 8876116Abstract: A sealing structure capable of reducing oil leakage while preventing the oil from being deteriorated by a temperature rise of the oil. The sealing structure is configured to seal a clearance between two members tightly by a seal ring interposed therebetween. The seal ring is provided with a slidable structure, which is configured to seal the clearance between the two members by a hydraulic pressure applied thereto, and to unseal the clearance between the two members by a relative movement thereof resulting from a thermal expansion thereof.Type: GrantFiled: April 20, 2011Date of Patent: November 4, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yuji Hattori, Kenta Kimura, Takafumi Inagaki, Tomokazu Inagawa
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Publication number: 20140246835Abstract: A component is disclosed. The component includes a base body with a first end section and a second end section. The first end section has a first locking protrusion with a first guide surface and a first guide section with a first support surface. The second end section has a second guide section with a second guide surface and a second locking protrusion with a second support surface. The first guide surface is contactable with the second guide surface with respect to a guide plane and the first support surface is contactable with the second support surface with respect to the guide plane such that the first locking protrusion is engageable with the second locking protrusion in a locked position.Type: ApplicationFiled: July 20, 2012Publication date: September 4, 2014Applicant: MTU Aero Engines AGInventors: Frank Stiehler, Lars Schellhorn
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Patent number: 8807516Abstract: A blowout preventer (BOP) is provided in which each ram includes a primary rope packing seal formed from a first length of rope packing extending horizontally across the front face, rearwardly and then either or both of upwardly and downwardly over the top and/or bottom portion of the ram. The primary rope packing seal is held in, so as to protrude radially outwardly from, a continuous first groove formed in the ram. The continuous first groove is adapted to accommodate joined abutting ends or overlapping ends of the first length of rope packing. A secondary rope packing seal and a circumferential rope packing seal may be provided on the ram.Type: GrantFiled: December 14, 2010Date of Patent: August 19, 2014Assignee: Stream-Flo Industries Ltd.Inventors: Tianle Guo, Tony M. Lam
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Patent number: 8720901Abstract: A seal ring that seals an annular gap formed between a shaft and a housing that has a shaft hole into which the shaft is inserted. The seal ring is configured such that one of both the ends and has a projection projecting in the direction of the circumference of the seal ring. The other end has a recess used in combination with the projection. The seal ring is characterized in that the recess has an inclining side face, which inclines from the direction of the circumference, and the projection and the recess form a sliding part so that a part of the edge of the leading end of the projection slides over the inclining side face of the recess, and portion of the sliding part is formed as a linear sliding portion.Type: GrantFiled: February 1, 2008Date of Patent: May 13, 2014Assignee: NOK CorporationInventors: Yosuke Kondo, Iwao Taira, Kazunari Seki
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Patent number: 8459655Abstract: A sealing device (1) having: a slide ring (2) and a back ring (3). The sealing device (1) is configured to seal an annular gap between a housing having a shaft hole, and a shaft inserted through the shaft hole. The slide ring (2) has: a through-cut (22), comprising a circumferential cut (22A), and axial cuts (22B) extending from both ends of the circumferential cut, along the axial direction; and multiple parting lines (23A, 23B) formed on a surface of the slide ring (2). The parting lines (23A, 23B) are arranged so that the parting lines (23A, 23B) are not overlapped with the circumferential cut (22A) exposed at the junction surface of the slide ring (2) with the back ring (3), throughout the lengthwise direction of the circumferential cut.Type: GrantFiled: September 22, 2010Date of Patent: June 11, 2013Assignee: NOK CorporationInventors: Toshiyuki Maeda, Yoshiyuki Abe
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Patent number: 8454024Abstract: In a seal ring, first and second abutments that are opposed to each other at a cut-apart portion have first and second protrusions 3a and 3b and first and second recesses 4a and 4b that are juxtaposed to each other in the axial direction, and a radial gap 5a is defined between the first protrusion 3a of the first abutment 1a that is pressed against a side wall 13a of an annular groove 13 formed in a shaft member 12 near a non-oil pressure side 14b and the second recess 4b of the second abutment 1b, with the radial gap 5a and a circumferential gap 2 between the first and second abutments 1a and 1b forming a passage through which an oil pressure side 14a of the annular gap 14 communicates with the non-oil pressure side 14b. The abutments 1a and 1b are not complicated in shape, and still, foreign matter contained in oil in the oil pressure side 14a can be smoothly discharged into the non-oil pressure side 14b.Type: GrantFiled: March 8, 2007Date of Patent: June 4, 2013Assignee: NTN CorporationInventor: Kouzou Kakehi
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Patent number: 8348280Abstract: A seal apparatus including at least first and second adjacent seal segments, each including an elongate body with ends defined at opposing elongate body ends, to be arranged such that an end of the first seal segment joins with a complementary end of the second seal segment, the end of the first seal segment including a first male component protruding from a plane of a first seal surface to define a first female mating section about the first male component, the end of the second seal segment including a second male component protruding from a plane of a second seal surface to define a second female mating section about the second male component, the first and second male components being receivable in the second and first female mating sections, respectively, to form first and second male component overlaps in at least two dimensions.Type: GrantFiled: October 22, 2010Date of Patent: January 8, 2013Assignee: General Electric CompanyInventors: Vishwas Kumar Pandey, Upendra Prabhu Nath Vemula Gopinath, Bhaskar Mani, Donkada Santhosh
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Patent number: 8262091Abstract: A seal assembly is provided for sealing a gap with a high pressure side and a low pressure side between a first component and a second component. The seal assembly can include a primary seal configured to be arranged on the first component and spanning the gap on the high pressure side between the first and second component; and a backup ring configured to be arranged on the first component adjacent the primary seal on the low pressure side. The backup ring includes an inner diameter and a scarf cut slit at an angle that is a function of the inner diameter of the backup ring.Type: GrantFiled: August 29, 2008Date of Patent: September 11, 2012Assignee: Honeywell International Inc.Inventor: Steven Alan Lewis
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Patent number: 8157268Abstract: The present invention relates to a piston ring (10), particularly a compression ring, for an internal combustion engine, comprising a ring-shaped body (11) having a ring joint (13) formed by butt ends (14a, 14b), the ring-shaped body (11) further having a ring contact face (12) along its perimeter, for contacting a cylinder wall in operation. According to the invention, the ring contact face (12) has a barrel-shaped profile, the barrel-shaped profile having in any of its cross-sections an area of maximum curvature, whose radius of curvature increases in the direction of the butt ends (14a, 14b).Type: GrantFiled: November 29, 2007Date of Patent: April 17, 2012Assignees: MAHLE International GmbH, MAHLE Metal Leve S/AInventors: Antonio Eduardo Meirelles Tomanik, Mauricio Ciminelli Duarte de Souza
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Patent number: 7869737Abstract: A developer cartridge includes a storing portion that stores developer and has an opening, a shutter member that opens and closes the opening, and a seal member that seals between the shutter member and the storing portion. The seal member is so provided that both end portions thereof face each other. One end portion of the seal member has at least one angled portion provided inside both side end edges of the seal member in width direction of the seal member, and the other end portion has an angled portion along the angled portion of said one end portion.Type: GrantFiled: July 23, 2008Date of Patent: January 11, 2011Assignee: Oki Data CorporationInventor: Yukiyoshi Oda
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Patent number: 7766339Abstract: A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an annular groove 71. This relief 5 is set to have a radially smaller width in the vicinity of a separate portion 2 and a radially larger width at a position apart from the separate portion 2, and the portion of the relief 5 to transit from the narrower portion to the wider portion is set to have a gradually changing width.Type: GrantFiled: July 20, 2007Date of Patent: August 3, 2010Assignee: NOK CorporationInventors: Kyohei Umetsu, Nobuyuki Eguchi
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Patent number: 7654536Abstract: A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an annular groove 71. This relief 5 is set to have a radially smaller width in the vicinity of a separate portion 2 and a radially larger width at a position apart from the separate portion 2, and the portion of the relief 5 to transit from the narrower portion to the wider portion is set to have a gradually changing width.Type: GrantFiled: May 29, 2003Date of Patent: February 2, 2010Assignee: NOK CorporationInventors: Kyohei Umetsu, Nobuyuki Eguchi
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Patent number: 7341256Abstract: A seal ring which maintains a stable sealing performance over a long term is provided. In a first seal portion, linear contact portions which come into linear contact with the sidewall surface of an annular groove on the unsealed fluid side are continuously extended over the whole circumference of the seal ring from one side of a separation portion to the other side thereof, and the linear contact part provided at the convex part of the separation portion, and the linear contact part provided at the concave part of the separation portion are located at a distance in the radial direction of the seal ring.Type: GrantFiled: July 25, 2003Date of Patent: March 11, 2008Assignee: NOK CorporationInventors: Shinya Nakaoka, Nobuyuki Eguchi, Naohiro Jotaki, Takaaki Yasudomi
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Patent number: 7165772Abstract: A self-locking seal ring is disclosed. The self-locking seal ring includes a ring body having a tab end segment on one end and a channel end segment on the opposite end. A lock tab is provided on the tab end segment, and a lock channel is provided on the channel end segment for receiving the lock tab. The self-locking seal ring is easy to install in a ring groove in a main butterfly plate of a butterfly valve, for example, and facilitates optimum sealing of the main butterfly plate with respect to the butterfly valve housing.Type: GrantFiled: October 29, 2004Date of Patent: January 23, 2007Inventor: Luis A. Camacho
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Patent number: 7121552Abstract: A piston ring includes a lateral surface which covers a circumferential surface of a piston and support segments with retaining surfaces which engage with the top and bottom of the piston. A piston ring joint allows the piston ring to be elastically deformed in the radial direction and is provided with a tongue at one end of the lateral surface, which tongue engages in an opening in the other end of the lateral surface. The tongue is designed with retaining segments which extend in the circumferential direction and continue as extensions of the support segments. The retaining segments engage supportively with the top and bottom of the piston. The opening is provided with carrier segments at least in certain areas of the circumference of the piston ring extensions of the support segments and holding the ends of the piston ring in place axially with respect to the piston, the carrier segments being supported in the axial direction of the piston on the retaining segments.Type: GrantFiled: December 4, 2003Date of Patent: October 17, 2006Assignee: ZF Sachs AGInventors: Hassan Asadi, Gerald Fenn
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Patent number: 6962343Abstract: A seal ring is provided, which is capable of maintaining a stable sealing performance for a long period, in which a cut portion is provided at one position in a circumferential direction of a seal ring, a convex portion is provided at a first cut end portion, a recess portion is provided at a second cut end portion, and the end portions of a third surface and a sixteenth surface extending in the circumferential direction among the convex portion and recess portion correspond to a portion of a second seal portion for sealing a side wall surface of an annular groove.Type: GrantFiled: April 27, 2001Date of Patent: November 8, 2005Assignee: NOK CorporationInventor: Tadashi Abiko
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Patent number: 6863277Abstract: A piston ring for the piston of a vibration damper includes a jacket and supporting segments connected to the jacket with holding surfaces. The supporting segments are supported axially on an upper side and a lower side of the piston by the holding surfaces. The piston ring has a seal carrier in which at least one seal is embedded, wherein the seal is oriented toward the piston proceeding from the seal carrier.Type: GrantFiled: September 27, 2002Date of Patent: March 8, 2005Assignee: ZF Sachs AGInventors: Peter Wirth, Gerald Fenn
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Patent number: 6726218Abstract: A compression piston ring capable of reducing excessive surface pressure at a gap and adjacent portion thereto during engine operation, and capable of being produced at a low cost. The compression piston ring has generally circular shape without any notched portion. The compression piston ring has a dimensional requirements in that d1/a1 ranges from 40 to 60, and d1/h1 ranges from 30 to 55, in which d1 represents an inner diameter of the piston ring, a1 represents a radial length between inner and outer peripheral surfaces of the piston ring, and h1 represents an axial length of the outer peripheral surface. The compression piston ring is particularly available as a first compression piston ring for a supercharging type diesel engine providing high engine pressure.Type: GrantFiled: October 4, 2001Date of Patent: April 27, 2004Assignee: Nippon Piston Ring Co., Ltd.Inventors: Hideo Negishi, Hideshi Hitosugi, Hideyo Iwama
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Patent number: 6719297Abstract: Piston ring including a covering surface which covers a circumferential surface of a piston, and supporting segments having retaining surfaces which engage the upper and lower sides of the piston. The piston ring has a butt joint which enables the piston ring to be elastically deformable radially, the butt joint being designed at one end of the covering surface with at least one tongue which engages in a cutout in the other end of the covering surface. The tongue is designed with at least one retaining segment which runs in the circumferential direction and engages in a supporting manner in each case on the upper and lower side of the piston.Type: GrantFiled: August 27, 2001Date of Patent: April 13, 2004Assignee: Mannesmann Sachs AGInventors: Gerald Fenn, Hassan Asadi, Matthias Höhn, Peter Wirth
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Publication number: 20040046329Abstract: A synthetic annular sealing ring is provided. The ring has a break therein with first and second complementary ends defining opposite sides of the break. An internally directed annular section of the ring has a first and second internal tongues protruding from the ring ends, and it has first and second internal slots formed in the internally directed section of the ring ends. The first internal tongue is aligned to fit into the second internal slot, and the second internal tongue is aligned to fit into said first internal slot. An externally directed annular section of the ring has a first and second external tongues abutting the second and first internal tongues and protruding from the ring ends, and it has first second external slots formed therein at the ring ends and abutting the second and first internal slots. The first external tongue is aligned to fit into the second external slot, and the second external tongue is aligned to fit into the first external slot.Type: ApplicationFiled: August 14, 2003Publication date: March 11, 2004Inventor: Koen Pieters
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Patent number: 6485026Abstract: A piston ring is broadly defined as a ring-shaped, non-stainless steel, iron alloy that is nitrided, and includes between about 1% and about 10% chromium by weight, and preferably includes between about 1% and about 2% chromium by weight, with additional alloying elements also included.Type: GrantFiled: October 4, 2000Date of Patent: November 26, 2002Assignee: Dana CorporationInventors: Hélène Hubert, Chantal Gral
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Patent number: 6450295Abstract: A ring-like lubricant supply device 6 is fitted into a recess 4 of a nut member 2. The lubricant supply device 6 contains a lubricant and is formed in an outer peripheral surface with notches 7. Tubular members 8 each having an outer diameter larger than the diameter of the notch 7 are inserted into the notches, pushing and widening the notches 7 in a circumferential direction. One end of the tubular member 8 is fitted into a recess 9b of a retaining ring 9 and the retaining ring 9 is fixed to a nut member 2.Type: GrantFiled: November 2, 2001Date of Patent: September 17, 2002Assignee: NSK Ltd.Inventors: Toru Tsukada, Soichiro Kato
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Patent number: 6397987Abstract: A dashpot piston in halves, the face of each resting against that of the other. The piston can be fastened to the end of a piston rod either directly or by way of a connector. Each half (1 & 2) is provided with a depression (7) along the circumference remote from the face of the other, creating a continuous groove (8) with a shorter diameter and accommodating a piston-assembly ring (9). Manufacture is facilitated by the inclusion of at least one resilient supporting ring (11) between the piston-assembly ring and the base of the groove.Type: GrantFiled: March 16, 2001Date of Patent: June 4, 2002Assignee: Krupp Bilstein GmbHInventors: Christoph Pesch, Helmut Drees
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Publication number: 20020041071Abstract: A compression piston ring includes a ring gap defined by facing first and second end faces; a ring back situated diametrically opposite the ring gap; first and fourth quadrants extending from opposite sides of the ring gap and second and third quadrants extending from opposite sides of the ring back to the respective first and fourth quadrants. The first end face is situated in the first quadrant and the second end face is situated in the fourth quadrant. The wall thickness of the compression piston ring is reduced exclusively in the first and fourth quadrants.Type: ApplicationFiled: August 24, 2001Publication date: April 11, 2002Inventors: Richard Mittler, Mario Solia
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Patent number: 5876040Abstract: The low pressure seal arrangement for sealing a space defined by an inner diameter of a pipe and a rod slidably disposed with the pipe. The low pressure seal includes a sealing insert of reusable, noncorrosive, shape retentive, resilient, boron-resistant, flexible polymeric resin with an axial passage for receiving the tubular rod. The sealing insert combines the functions of a gasket and a stopper, the sealing insert having a hub end of a larger diameter than the pipe, preventing the sealing insert from slipping into the pipe. The sealing insert is installed by hand without tools and resists a pressure of at least 350 psi. The sealing insert may be removed and reused, reducing the amount of radioactive waste generated by the nuclear reactor.Type: GrantFiled: October 15, 1996Date of Patent: March 2, 1999Inventors: Danny L. Adams, Ira I. Miles
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Patent number: 5865443Abstract: In the manufacture of a seal ring having a cut portion at one position on the circumference by injecting a molten molding material from a gate into a cavity of a forming die, the gate is provided at a position apart from the opposite position to the cut portion of the seal ring. In the case of a seal ring with a weld portion, the weld portion is set away from the cut portion.Type: GrantFiled: July 31, 1996Date of Patent: February 2, 1999Assignee: NOK CorporationInventor: Yoshiyuki Abe
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Patent number: 5836589Abstract: A sliding member used as a sealing ring for a rotary shaft made of a lightweight aluminum alloy in an automatic transmission instead of a conventional cast iron sealing ring in order to prevent leakage of oil and reduce abrasion of the shaft consists of a PEEK resin composition which includes, as binder, 15.about.20 percent by weight of amorphous alumina powder having an average particle diameter of 5.mu. or less, 3.about.8 percent by weight of graphite powder having an average particle diameter of 5.mu. or less and 6.about.9 percent by weight of carbon powder having an average particle diameter of 30.mu. or less.Type: GrantFiled: July 30, 1997Date of Patent: November 17, 1998Assignee: Kabushiki Kaisha RikenInventor: Tatsuei Sakata