US3561776A - Composite ring seal and method of making - Google Patents

Composite ring seal and method of making Download PDF

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Publication number
US3561776A
US3561776A US777227A US3561776DA US3561776A US 3561776 A US3561776 A US 3561776A US 777227 A US777227 A US 777227A US 3561776D A US3561776D A US 3561776DA US 3561776 A US3561776 A US 3561776A
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US
United States
Prior art keywords
jacket
channel
spring
strip
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US777227A
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English (en)
Inventor
John D Wilson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Performance Plastics Corp
Original Assignee
Fluorocarbon Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fluorocarbon Co filed Critical Fluorocarbon Co
Application granted granted Critical
Publication of US3561776A publication Critical patent/US3561776A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
    • F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/935—Seal made of a particular material
    • Y10S277/944—Elastomer or plastic
    • Y10S277/945—Containing fluorine
    • Y10S277/946—PTFE

Definitions

  • awrlwrafion ofcalifflrma ABSTRACT A radial loaded ring seal having an annular jacket of suitable material such as Teflon, the jacket being of l COMPOSITE RING SEAL AND METHOD OF channel-shaped cross sectlon surrounding a loading spring of M AKING channel-shaped cross sectlon, the loading spring being 23 claims 15 Drawing Figs fabncated from a s prlng strlp of sultable materlal suchas stainless steel by belng hellcally wound lnto a tube m which U-S.
  • the present invention relates to ring seals.
  • the inherent disadvantages of the prior art structures have been overcome by a unique spring design which eliminates openings and gaps and provides a relatively smooth loading surface, while at the same time enabling the use of a U-shaped section spring of generally conventional configuration but offering high compliance when utilized in a radial loaded orientation. Since the loading is substantially continuous, the spring of the present invention permits a thinner jacket than is possible in conventional designs. This is a vital advantage as in many applications it avoids the possibility of a thick jacket overpowering the spring under certain operating conditions which could cause a failure of the seal.
  • the spring structure of the present invention provides a longer jacket life in dynamic applications, and overcomes the disadvantages of springs of the prior art structure under static conditions where, for example, helical wound springs, particularly those utilizing wire, have been known to cut through the jackets.
  • the spring structure of the present invention further pennits the fabrication of a radial loaded seal with a W cross section jacket which is particularly advantageous to form a shield over the spring as a protection against types of sealed media which would be damaging to the spring material.
  • the jacket is "clean,” easily rinsed, and not a source of entrapment for fluid which may later act as a contaminant. In the case of food processing, it is apparent that media such as milk cannot be sealed in commercial equipment with open spring seals, since this design does not insure complete removal of entrapped milk, even with steam cleaning.
  • the present invention relates generally to scaling rings and is more particularly concerned with sealing rings of the type which are radially spring loaded, and an improved method for the fabrication thereof.
  • a further object is to provide a composite ring seal in which an annular sealing jacket is energized by a loading spring comprised of an imperforate helically wound strip in which the marginal edges of adjacent convolutions are in overlapping relation.
  • a further object is to provide a composite sealing ring ineluding an annular sealing jacket of Teflon or the like having a channel cross section and a helically wound imperforate loading spring having a channel cross section, and wherein the jacket provides a protective shield for the spring.
  • a still further object is to provide a composite ring seal structure in which the loading spring comprises a helically wound flat strip having edge margins of successive convolutions in overlapping relation so as to provide an imperforatc surface, and wherein the wound strip structure is deformed transversely into a channel configuration.
  • Another object is to provide a ring seal loading spring of helically wound construction which is transversely of channel configuration, and wherein the channel embodies double imperforate walls.
  • Still another object is to provide an improved method of fabricating an annular loading spring and associated jacket to provide a composite ring seal structure
  • FIG. 1 is a sectional view through a ring seal embodying the features of the present invention as it would appear when installed in a seal cavity;
  • FIG. 2 is an enlarged transverse sectional view through a strip such as used for fabricating the spring means embodied in the ring seal of the present invention
  • FIG. 3 is an elevational view, partly in section of mechanism for winding the spring strip
  • FIG. 4 is a sectional view of the same, taken substantially on line 4-4 of FIG. 3;
  • FIG. 5 is an enlarged view of the wound strip as it appears during the winding operation, portions being in section to show the overlap of the edge margins of the successive convolutions;
  • FIGS. 6, 7, and 8 are enlarged fragmentary perspective views showing the successive steps for joining the ends of a length of the helically wound strip to provide a ring configuration for the seal spring;
  • FIG. 9 is a sectional view taken substantially on line 9-9 of FIG. 8;
  • FIG. 10 is an enlarged plan view of the spring ring as it appears prior to deformation into its final channel configuration
  • FIG. 11 is a view illustrating mechanism for deforming the spring ring, by means of cooperable die members shown in open position;
  • FIG. 12 is a fragmentary view showing the die members in closed position with the deformed ring therein;
  • FIG. I3 is an enlarged fragmentary perspective showing the channel configuration of the spring, including a transverse section therethrough to indicate the doublewalled structure thereof;
  • FIG. 14 is an enlarged fragmentary perspective view showing the preformed seal jacket as initially applied to the completed spring means during fabrication of the ring seal.
  • FIG. is an enlarged fragmentary view illustrating the completed composite ring seal, a transverse section being taken therethrough for disclosing the cooperative association of the jacket and spring parts.
  • a composite sealing ring as generally indicated at 10 which embodies the features of the present invention and essentially includes a flexible annular jacket A and associated loading spring means B mounted in the jacket to reinforce and resist undue deformation thereof, as well as energize the jacket to assure a proper sealing action thereof.
  • the jacket is constructed with a ring configuration having a channel-shaped cross section. More specifically, this jacket is fabricated so as to provide outer and inner circumferentially extending sidewalls Ila and llb which extend over the associated sidewalls 12a and 12b of the loading spring means B.
  • the loading spring structure B as in the case of the jacket, is of ring configuration with a channel cross section which is U-shaped, the sidewalls 12a and 12b being bridged by bottom wall portion 12c. As will be seen in FIG.
  • the bottom wall portion of the loading spring means is intimately engaged by inwardly extending wall portions 13a and 13b which are integrally formed with the jacket sidewalls and extend inwardly into embracing engagement with the bridging wall portion of the loading spring means.
  • the sidewalls 11a and 1112 are interconnected by an integrally formed wall portion 11c, this portion being deflected between its ends so as to provide inner sidewalls 14a and 141; connected by a bridging wall 140 which are conformed to the inner wall surfaces of the loading spring means.
  • the loading spring means is of substantially U-shaped cross section, while the jacket is of substantially W-shaped cross section.
  • the jacket provides a protecting shield for the spring means with respect to its side opening and prevents the sealed medium from coming into contact with the loading spring means.
  • the sidewalls 11a and Ilb are respectively provided with circumferentially extending sealing surface faces lSa and 15b which are adapted to engage circumferentially extending surfaces 160 and 16b which are to be sealed when the sealing ring is positioned within a seal cavity 17 which is in communication with a source of fluid pressure through an annular passage as indicated by numeral 18.
  • the seal cavity is provided with a backup wall 19 which provides an abutment surface for circumferentially extending end faces 20a and 20b formed respectively on the wall portions 13a and 13b. Adjacent the surfaces 160 and 16b, the wall portions 13a and 13b have circumferentially extending surfaces 21a and 21b which are slightly recessed with respect to the sealing faces 15a and 15b so as to provide a small clearance.
  • the jacket A be formed of a tough, dura blc, flexible material such as polytetrafluoroethylene resin, commonly known as Teflon" or some similar plastic material having the desired characteristics, and which will permit the fabrication of the jacket so as to have the preferred configura tion as explained above by using extrusion, molding, or machining processes as conventionally employed.
  • Teflon polytetrafluoroethylene resin
  • a main feature of the present invention resides in the unique construction embodied in the loading spring, and the method of its fabrication and embodiment into the composite sealing ring structure as described above.
  • a most important factor contributing to the success of applicants sealing ring resides in a design concept which permits the utilization of a spring unit which embodies a helically coiled spring element in a manner whereby the inherent disadvantages of conventional arrangements will be successfully eliminated. It is believed that the construction of the loading spring unit will be best understood by explaining the method or manner of its fabricatron.
  • a strip 22 of flat ribbonlike material for example, stainless steel or other suitable material is helically wound into the form of a flexible tube in such a manner that the marginal edges of successive convolutions will have overlapping relationship in which the leading edge 24 of each convolution will be outwardly exposed, while the trailing edge of the convolutions as indicated at 25 will be concealed by successive strip turns.
  • the mechanism for winding such a tube may vary as to details.
  • a mechanism for this purpose is disclosed in FIGS. 3 and 4 as including a frame member 26 having edge seating flanges 27-27.
  • An annular hub 26 on one side is positioned between these flanges and extends outwardly from a surrounding recessed planar surface 27a.
  • An associated plate member 28 is provided with an opening 29 adapted to receive the hub thereinto to permit mounting of the plate 28 into assembled relation in face engagement with the seating flanges 27-27 in which position it can be secured by threaded screws 30.
  • the hub 26' and associated plate 28 are provided with a series of aligned passages 31 which rotatably support a mandrel 32 therein.
  • the mandrel 32 extends through a winding passage 33 of sufficiently increased diameter to permit the winding of the tube structure 23 therein.
  • the strip 22 is fed edgewise to the mandrel through the space 34 between the inner surface of plate 28 and the recessed planar surface 27a during a winding operation.
  • the wound strip is heated to a suitable temperature, for example, a temperature of the order of 900 F. in the case of stainless steel materials to relax the material and achieve a tightening of the winding.
  • a suitable temperature for example, a temperature of the order of 900 F. in the case of stainless steel materials to relax the material and achieve a tightening of the winding.
  • the wound strip is removed from the mandrel, cleaned, and cut to required lengths.
  • the cut length of tube 23 is then formed into a circular or a ring configuration 36 (FIG. 10) by juxtaposing the opposite ends of the tube length, as shown in FIG. 6, wherein opposite ends of the strip, as indicated at 220 and 22b, are positioned so that upon telescoping the ends of the tubular structure, the strip ends 22a and 22b, may be easily guided and worked into an overlapping initial engagement, as shown in FIG. 7.
  • the overlapped strip ends 220 and 22b may be caused to reach a desired fully lapped engagement as shown in FIGS. 8 and 9.
  • FIGS. 11 and 12 One mechanism for deforming the ring configuration 36 is disclosed in FIGS. 11 and 12 as comprising a lower female die member 37 and an operatively associated upper male die member 38, the die members being supported for relative movement to open and closed positions.
  • the female die member is disclosed as having an annular groove 39 having an upwardly opening side defined by outer and inner concentric walls 401: and 40!) leading downwardly to downwardly converging sidewall portions 4la'and 41b respectively, which are interconnected at their lower extremities by a curved bottom wall 410.
  • a ring 36 may be placed in an initial position at the upper end of the annular groove between the concentric walls 40a and 40b.
  • the male die member 38 is provided with an appropriate annular projection 42 which isprovided at its base portion with inner and outer concentric wall portions 43a and 43b which lead to downwardly converging wall portions 440 and 44b, which terminate at their lower extremities in a curved end portion Me.
  • the annular groove 39 and annular projection 42 are so dimensioned that when the die members 37 and 38 are moved into closed position, as shown in H6. 12, the inserted ring 36 will be deformed into the bottom of the groove 39 in such a manner as to produce a double walled U -shaped channel configuration such as forms the loading spring means B of the composite sealing ring of the present invention.
  • deforming the ring 36 it is desirable to allocate the ring so that'the overlapped strip ends 22a and 22b will be positioned within the bottom of the channel as shown in FIG. 13. The overlapped ends are then spot welded together as indicated at 45.
  • the deformed, U-shaped spring structure is then passivated and is ready for assembly into the preformed jacket structure A as shown in FIG. 14 for the final assembly operation.
  • the jacket A and loading spring means B oriented as shown in FIG. 14, with the sidewalls 11a and llb of the jacket outwardly spaced with respect to the sidewalls 12a and 12b of the spring means, so that the wall portion 110 is of straight undeformed configuration, the assembled parts are placed in a suitable mold where they are heated to a temperature of sub stantially 250 F. and then cooled.
  • the wall portion llc is deflected into the channel of the spring means, and the sidewalls 11a and llb moved into engaged position with the sidewalls 12a and 12b to provide the finished structure as shown in FIG. 15.
  • the loading spring may have the sealing material applied directly as a surface coating or covering.
  • the sealing material in such case would include any of a variety of materials such as plastics, metals, e.g., lead, and the like, which would be applied to the spring material either prior to or after the coiling operation.
  • a composite sealing ring comprising:
  • annular flexible sealing jacket of channel-shape in cross section formed to provide spaced opposed side walls
  • said spring means comprising a helically wound flat strip and being of generally channel shape configuration in cross section and formed to provide spaced opposed sidewalls respectively acting on said jacket sidewalls to resist deformation thereof.
  • a sealing ring according to claim I wherein the edge margins of successive convolutions of the wound strip are in overlapping relation.
  • a sealing ring according to claim 3' wherein the exposed overlapped edge is of less thickness than the concealed edge.
  • a sealing ring according to claim 1, wherein the spring means channel is substantially U-shaped and formed with a double wall.
  • annular spring means comprising:
  • a. a ring formed by a helically wound ribbonlike strip having overlapped convolutions, said wound strip having its opposite ends connected;
  • said ring having a double-walled U-shaped cross section including an inner wall and an outer wall;
  • annular spring means of generally channelshaped cross section having a side opening and in which a helically wound ribbonlike strip of spring material has marginally material successive convolutions;
  • edge of the wound strip which is outwardly exposed is of less thickness than the other edge, whereby the tubular structure will have a substantially smooth outer surface.
  • leading edge is stretched by feeding the strip edgewise, prior to winding, over an arcuate path in which the leading edge is radially outwardly positioned with respect to the other strip edge.
  • a sealing ring comprising:
  • a sealing ring according to claim 20, wherein the spring eluding a helically wound ribbonlike strip having overmeans has a substantially Ushapcd cross section with lapped convolutions coac ing to provid a l all in sidewalls extending from a bottom bridging portion and the Said sccl-ionian'j jacket sidewalls include portions overlapping said bottom b. a sealing medium overlying surfaces of the wound strip b id i portion on i inner d outer u facg5 adapted to sealingly engage a surface under the loading 23,
  • a om osite sealing ring comprising:
  • cfoss Section formed to provide Spaced Opposed
  • circumferentially extending spring loading means sidewalls; between said sidewalls, said spring means being of clrcumferemlauy extendmg sprmg oadmg means generally channel shape configuration in cross section l l i z F spmfg w i of and formed to provided spaced opposed sidewalls respecgenera y 0 ape guratmn cross mono" tively acting on said jacket sidewalls to resist deformation and formed to provide spaced opposed sidewalls respecthereof. and
  • jacket sidewalls having inner and outer wall portions i a h g i z g embracing and shielding the spring means in an operative i e .Sprmg mcdlis emg n e i e sides of said channels in confronting relation, and the position from the sealed medium.
  • i 21. A sealing ring according to claim 20, wherein the jacket Jacket wan Pomons embracmg and shleldmg the Sprmg means in an operative position from the sealed medium outer wall portions have circumferentially extending outer sealing faces.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)
  • Sealing Devices (AREA)
US777227A 1968-11-20 1968-11-20 Composite ring seal and method of making Expired - Lifetime US3561776A (en)

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US77722768A 1968-11-20 1968-11-20

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001562A1 (en) * 1979-02-02 1980-08-07 Caterpillar Tractor Co Sheave block and seal assembly therefor
EP0033221A1 (de) * 1980-01-28 1981-08-05 W.S. SHAMBAN EUROPA A/S (W.S.SHAMBAN & COMPANY A/S) Abdichtungsvorrichtung mit einer umschlossenen, wirksamen Feder
US4477091A (en) * 1983-02-24 1984-10-16 Gray Tool Company Fire resistant connections and U-like sealing means therefor
US4592558A (en) * 1984-10-17 1986-06-03 Hydril Company Spring ring and hat ring seal
US4671326A (en) * 1984-09-17 1987-06-09 Westinghouse Electric Corp. Dual seal nozzle dam and alignment means therefor
US4900041A (en) * 1988-04-27 1990-02-13 Fmc Corporation Subsea well casing hanger packoff system
US5163692A (en) * 1989-07-24 1992-11-17 Furon Company One-piece composite lip seal
US5265890A (en) * 1990-12-03 1993-11-30 Peter J. Balsells Seal with spring energizer
US5517958A (en) * 1994-10-25 1996-05-21 Yamaha Hatsudoki Kabushiki Kaisha Cylinder head gasket
US5599600A (en) * 1993-02-09 1997-02-04 Edlon, Inc. Nozzle repair shield
US6663112B1 (en) * 1999-05-31 2003-12-16 Enebacken Skrea Ab Sealing device
US6860484B2 (en) * 2000-02-12 2005-03-01 Alstom (Switzerland) Ltd. Rotor seal with folding strip
EP1567793A2 (de) * 2002-11-22 2005-08-31 Dionex Corporation Dichtung für hochdruckpumpsystem
US20060113730A1 (en) * 2003-04-07 2006-06-01 Takao Suzuki Combination oil ring
US20060157116A1 (en) * 2005-01-14 2006-07-20 Flow-Safe, Inc. Balanced safety relief valve
WO2009023824A2 (en) 2007-08-15 2009-02-19 Federal-Mogul Corporation Lateral sealing gasket and method
US20090322039A1 (en) * 2006-09-27 2009-12-31 Wilhelm Kullen Sealing system for exhaust-gas lines
US20100326737A1 (en) * 2009-06-24 2010-12-30 Peddle Darron G Flexible extrusion resistant ring for seal assembly
US20110012313A1 (en) * 2009-07-17 2011-01-20 Gm Global Technology Operations, Inc. Seal performance for hydrogen storage and supply systems
US20130099451A1 (en) * 2011-10-25 2013-04-25 Judson B. Estes Self-sealing gasket
US20150054226A1 (en) * 2013-08-22 2015-02-26 Hubert Sonleiter Shaft Seal and Method for Producing a Shaft Seal
WO2019144181A1 (en) * 2018-01-29 2019-08-01 BYRNE, Jeanette Hose coupling seal
CN110762218A (zh) * 2018-07-26 2020-02-07 舍弗勒技术股份两合公司 密封圈
CN115255129A (zh) * 2022-07-27 2022-11-01 哈尔滨东安实业发展有限公司 一种金属储能弹簧中空结构的加工方法及其加工装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923988C2 (de) * 1989-07-20 1993-10-21 Daimler Benz Ag Dichtungsanordnung
DE10110798C2 (de) * 2000-07-11 2003-09-25 Heinz Hartmann Holzbauelement zur Erstellung einer Holzklimawand sowie Holzklimawand unter Verwendung der Holzbauelemente

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114561A (en) * 1959-10-13 1963-12-17 Creath Composite seal with resilient expansion member
US3223426A (en) * 1964-08-03 1965-12-14 Aeroquip Corp Sealing ring
US3341211A (en) * 1963-04-01 1967-09-12 Garlock Inc Packing rings and method of making them
US3357693A (en) * 1963-05-28 1967-12-12 Fmc Corp Energizer for fluid seal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114561A (en) * 1959-10-13 1963-12-17 Creath Composite seal with resilient expansion member
US3341211A (en) * 1963-04-01 1967-09-12 Garlock Inc Packing rings and method of making them
US3357693A (en) * 1963-05-28 1967-12-12 Fmc Corp Energizer for fluid seal
US3223426A (en) * 1964-08-03 1965-12-14 Aeroquip Corp Sealing ring

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001562A1 (en) * 1979-02-02 1980-08-07 Caterpillar Tractor Co Sheave block and seal assembly therefor
US4240614A (en) * 1979-02-02 1980-12-23 Caterpillar Tractor Co. Sheave block and seal assembly therefor
EP0033221A1 (de) * 1980-01-28 1981-08-05 W.S. SHAMBAN EUROPA A/S (W.S.SHAMBAN & COMPANY A/S) Abdichtungsvorrichtung mit einer umschlossenen, wirksamen Feder
US4477091A (en) * 1983-02-24 1984-10-16 Gray Tool Company Fire resistant connections and U-like sealing means therefor
US4671326A (en) * 1984-09-17 1987-06-09 Westinghouse Electric Corp. Dual seal nozzle dam and alignment means therefor
US4592558A (en) * 1984-10-17 1986-06-03 Hydril Company Spring ring and hat ring seal
US4900041A (en) * 1988-04-27 1990-02-13 Fmc Corporation Subsea well casing hanger packoff system
US5163692A (en) * 1989-07-24 1992-11-17 Furon Company One-piece composite lip seal
US5265890A (en) * 1990-12-03 1993-11-30 Peter J. Balsells Seal with spring energizer
US5599600A (en) * 1993-02-09 1997-02-04 Edlon, Inc. Nozzle repair shield
US5517958A (en) * 1994-10-25 1996-05-21 Yamaha Hatsudoki Kabushiki Kaisha Cylinder head gasket
US6663112B1 (en) * 1999-05-31 2003-12-16 Enebacken Skrea Ab Sealing device
US6860484B2 (en) * 2000-02-12 2005-03-01 Alstom (Switzerland) Ltd. Rotor seal with folding strip
EP1567793A2 (de) * 2002-11-22 2005-08-31 Dionex Corporation Dichtung für hochdruckpumpsystem
EP1567793A4 (de) * 2002-11-22 2006-03-01 Dionex Corp Dichtung für hochdruckpumpsystem
AU2003295815B2 (en) * 2002-11-22 2009-07-23 Dionex Corporation Seal for high-pressure pumping system
US20060113730A1 (en) * 2003-04-07 2006-06-01 Takao Suzuki Combination oil ring
US7513270B2 (en) * 2005-01-14 2009-04-07 Flow-Safe, Inc. Balanced safety relief valve
US20060157116A1 (en) * 2005-01-14 2006-07-20 Flow-Safe, Inc. Balanced safety relief valve
US8328203B2 (en) * 2006-09-27 2012-12-11 Elringklinger Ag Sealing system for exhaust-gas lines
US20090322039A1 (en) * 2006-09-27 2009-12-31 Wilhelm Kullen Sealing system for exhaust-gas lines
EP2179201A2 (de) * 2007-08-15 2010-04-28 Federal-Mogul Corporation Seitliche dichtung und verfahren
WO2009023824A2 (en) 2007-08-15 2009-02-19 Federal-Mogul Corporation Lateral sealing gasket and method
JP2014077546A (ja) * 2007-08-15 2014-05-01 Federal-Mogul Corp 横方向シールガスケットおよび方法
EP2179201A4 (de) * 2007-08-15 2012-01-18 Federal Mogul Corp Seitliche dichtung und verfahren
US20100326737A1 (en) * 2009-06-24 2010-12-30 Peddle Darron G Flexible extrusion resistant ring for seal assembly
US8444185B2 (en) 2009-06-24 2013-05-21 Parker-Hanninfin Corporation Flexible extrusion resistant ring seal assembly
US8251373B2 (en) * 2009-07-17 2012-08-28 GM Global Technology Operations LLC Seal performance for hydrogen storage and supply systems
US20110012313A1 (en) * 2009-07-17 2011-01-20 Gm Global Technology Operations, Inc. Seal performance for hydrogen storage and supply systems
US20130099451A1 (en) * 2011-10-25 2013-04-25 Judson B. Estes Self-sealing gasket
US20150054226A1 (en) * 2013-08-22 2015-02-26 Hubert Sonleiter Shaft Seal and Method for Producing a Shaft Seal
US9726291B2 (en) * 2013-08-22 2017-08-08 Karl Storz Gmbh & Co. Kg Shaft seal and method for producing a shaft seal
WO2019144181A1 (en) * 2018-01-29 2019-08-01 BYRNE, Jeanette Hose coupling seal
US11585442B2 (en) 2018-01-29 2023-02-21 Jeanette Byrne Hose coupling seal
CN110762218A (zh) * 2018-07-26 2020-02-07 舍弗勒技术股份两合公司 密封圈
CN115255129A (zh) * 2022-07-27 2022-11-01 哈尔滨东安实业发展有限公司 一种金属储能弹簧中空结构的加工方法及其加工装置
CN115255129B (zh) * 2022-07-27 2023-04-18 哈尔滨东安实业发展有限公司 一种金属储能弹簧中空结构的加工方法及其加工装置

Also Published As

Publication number Publication date
DE1935702B2 (de) 1974-07-11
GB1249574A (en) 1971-10-13
DE1935702A1 (de) 1970-06-04
DE1935702C3 (de) 1975-02-27

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