EP0774568B1 - Ventilschaftabdichtung - Google Patents
Ventilschaftabdichtung Download PDFInfo
- Publication number
- EP0774568B1 EP0774568B1 EP96113464A EP96113464A EP0774568B1 EP 0774568 B1 EP0774568 B1 EP 0774568B1 EP 96113464 A EP96113464 A EP 96113464A EP 96113464 A EP96113464 A EP 96113464A EP 0774568 B1 EP0774568 B1 EP 0774568B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- spring
- sealing
- sleeve
- sealing body
- 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
Links
- 238000007789 sealing Methods 0.000 title claims description 84
- 238000002485 combustion reaction Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 10
- 210000000078 claw Anatomy 0.000 claims description 8
- 239000013536 elastomeric material Substances 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 241000209035 Ilex Species 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
Definitions
- the invention relates to a valve stem seal in an internal combustion engine comprising a sleeve made of tough hard Material with a first and a second end face, the sleeve on its first end face extending in the radial direction to the outside Has flange and on the axially opposite second end face extending inwardly in the radial direction support wall, the Flange forms the abutment for a valve spring, with a valve stem sealingly enclosing ring-shaped sealing body through a press fit sealingly touches the inner circumference of the sleeve and the support wall and the Sealing body has at least one annular first sealing lip.
- valve stem seal is known from EP 0 392 893 A1.
- the sleeve is positively connected to a valve stem guide, an annular sealing body made of elastomeric material being arranged in the axial direction between the support wall, the sleeve and the end face of the valve stem guide.
- the annular first sealing lip of the sealing body surrounds the valve stem with a radial preload, and one second sealing lip is supported on the front of the valve stem guide.
- the elastic pressure on the two sealing lips is achieved by the elasticity of the material from which the sealing body is made.
- valve stem seal is from US-A-5,174,256 known.
- the sleeve has a radially outwardly extending Flange, which is designed as an abutment for the valve spring.
- To the The flange closes a cylinder section which extends essentially in the axial direction on.
- a Support body of a valve stem seal guided the valve stem seal a first sealing lip sealingly enclosing the valve stem and a second Has sealing lip, which is supported on the end face of a valve stem guide is.
- the first sealing lip is radially on the outer circumferential side of an annular spring enclosed.
- the helical spring is separate in relation to the support body created and assembled.
- a piston seal is known from EP 0 333 961 A1.
- the piston seal is formed in two parts and comprises a sealing body by a support body is enclosed.
- the invention has for its object a valve stem seal at the beginning mentioned type to develop such that the sealing body and Spring secured against loss and permanently positioned to each other, that the sealing arrangement is more compact, less weight has and is inexpensive to manufacture and easy to assemble.
- the sealing body with a support body is connected that the support body at least as a spring for pressing an annular first sealing lip is formed on the valve stem and that the spring is supported directly on the support wall.
- the sealing body consists of an elastomeric material and at least has an annular first sealing lip.
- the sealing body has a second sealing lip on the side facing away from the spring Front side of the sealing body, the second sealing lip with the frontal limit of the valve guide is sealingly engaged.
- the sleeve is pressed against the valve guide in the axial direction by a valve spring and is held in place.
- the sealing body is arranged inside the sleeve, the valve stem by a preloaded spring with its first sealing lip sealingly encloses and with its second sealing lip the valve guide touched.
- the first sealing lip seals the reciprocating one Valve stem dynamic
- the second sealing lip seals against the valve guide static.
- the dynamic sealing of the first sealing lip on the valve stem on the one hand leads to adequate lubrication in the area dynamic sealing is guaranteed and is prevented on the other hand, that an undesirably large leakage occurs, for example, via the valve stem the cylinders of the internal combustion engine arrive.
- an undesirably large leakage occurs, for example, via the valve stem the cylinders of the internal combustion engine arrive.
- the sleeve has at least two extending in the axial direction Sealing body on the circumferential enclosing claws, which in each other The circumferential direction is spaced adjacent and evenly in the circumferential direction are distributed.
- the retaining wall is preferred by the Holding claws formed.
- the advantage here is that the holding claws Material required to manufacture the sleeve - based on a circumferential direction self-contained sleeve - is significantly reduced. It can be provided that four are uniform in the circumferential direction distributed retaining claws are used, the circumference of the sealing body enclose. Both the first and the second sealing lip lie in each case under elastic prestress on the component to be sealed.
- the Assembly of the sealing arrangement simplified and easy assignment the parts are guaranteed for the entire service life.
- the Combining the two sealing lips in a sealing body is both the manufacture as well as the assembly of the seal assembly simplified.
- the inclusion of the two sealing lips in a sealing body Amount of the elastomeric material required for a reliable seal reduced to a minimum.
- the retaining wall which is the abutment for the one-piece connected to the sealing body Spring forms part of the claws.
- the sleeve can consist of a metallic or polymeric material. in the With regard to the lowest possible relaxation of the sleeve and the spring given preference to one metallic material each.
- the spring can consist of a polymeric material.
- the spring preferably has an essentially L-shaped cross section.
- the leg extending essentially in the axial direction covers the first sealing lip completely in the axial direction. This ensures that the first sealing lip always the valve stem with a predetermined bias encloses tightly.
- valve stem seal 10 includes.
- the sleeve 14 consists in this embodiment of a metallic material. Deviating from this, however, can also, for example tough, hard polymeric materials are used.
- the sealing body 24 consists of rubber or elastomer, the first sealing lip 28 by two intersecting conical surfaces is formed and the valve stem 12 sealingly touched on the circumferential side under elastic prestress.
- the valve stem 12 is guided within the valve guide 38.
- the valve acts against the spring force of the valve spring 16 by a camshaft, not shown here, in the open position and then transferred back to the closed position by the valve spring 16.
- the sleeve 14 On its first end face, the sleeve 14 has a radial direction outwardly extending flange 20 on and on the axially opposite second end face an inwardly extending in the radial direction Support wall 18.
- the support wall 18 forms the abutment for the spring 26 and touches them immediately.
- the elastomeric material also seals of the sealing body 24 from the sleeve 14.
- the one that extends radially outward Flange 20 serves as an abutment for the valve spring 16.
- the cylinder head 22 consists for example of a light metal alloy. Deviating from this the cylinder head can also consist of cast iron.
- the second sealing lip 34 of the sealing body 24 statically seals the valve guide 38 from.
- the sealing body 24 is shown, which forms a unit with the spring 26. Both the first sealing lip 28 and the second sealing lip 34 are shown in FIG are ring-shaped and touch the surfaces to be sealed below elastic pre-tension.
- the spring 26 is annular and consists in this embodiment of a polymeric material. Regarding a low weight of the sealing arrangement is one Design of advantage to be emphasized.
- the elastomeric material of the Sealing body 24 is during its manufacture with the spring 26 by vulcanization connected. In that the spring 26 and the sealing body 24 in one piece are merged into each other, is a jumping out of the Spring 26 excluded from the sleeve 14 during assembly.
- the unit, consisting of the spring 26 and the sealing body 24 is thus within the Sleeve 14 placed that the spring 26, the support wall 18 directly adjacent touched.
- the sealing body 24 is sealed within with elastic prestress the sleeve 14 arranged.
- the sealing arrangement according to the invention brings about an exact concentric assignment of sleeve 14, sealing body 24 and valve stem 12 to each other. For good performance during a long period Service life, this is a noteworthy advantage.
- the sleeve 14 is shown as a single part in a sectional view. It it can be seen that in this embodiment four are in the axial direction extending holding claws 36 are provided which are mutually circumferential spaced adjacent and even in the circumferential direction are distributed.
- the advantage here is that the entire bearing arrangement a comparatively low weight due to such a design and significant material savings are possible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Lift Valve (AREA)
- Temperature-Responsive Valves (AREA)
Description
zweite Dichtlippe ist auf der Stirnseite der Ventilschaftführung abgestützt. Die elastische Anpressung der beiden Dichtlippen erfolgt durch die Elastizität des Werkstoffs, aus dem der Dichtkörper besteht.
Claims (8)
- Ventilschaftabdichtung (10) in einer Verbrennungskraftmaschine, umfassend eine Hülse (14) aus zähhartem Werkstoff mit einer ersten und einer zweiten Stirnseite, wobei die Hülse (14) an ihrer ersten Stirnseite einen sich in radialer Richtung nach außen erstreckenden Flansch (20) aufweist und an der axial gegenüberliegenden zweiten Stirnseite eine sich in radialer Richtung nach innen erstreckende Stützwand (18), wobei der Flansch (20) das Widerlager für eine Ventilfeder (16) bildet, wobei ein einen Ventilschaft (12) dichtend umschließender, ringförmiger Dichtkörper (24) durch eine Presspassung den Innenumfang der Hülse (14) und die Stützwand (18) dichtend berührt und wobei der Dichtkörper (24) zumindest eine ringförmigen erste Dichtlippe (28) aufweist, dadurch gekennzeichnet, dass der Dichtkörper (24) mit einem Stützkörper verbunden ist, dass der Stützkörper als vorgespannte Feder (26) zur Anpressung zumindest der ringförmigen ersten Dichtlippe (28) an den Ventilschaft ausgebildet ist und dass die Feder (26) unmittelbar an der Stützwand (18) abgestützt ist.
- Ventilschaftabdichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Dichtkörper (24) aus elastomerem Werkstoff besteht.
- Ventilschaftabdichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass der Dichtkörper (24) eine zweite Dichtlippe (34) auf der der Feder (26) abgewandten Stirnseite des Dichtkörpers (24) aufweist und dass die zweite Dichtlippe (34) mit der stirnseitigen Begrenzung einer Ventilführung (38) dichtend in Eingriff ist.
- Ventilschaftabdichtung nach einem Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Hülse (14) zumindest zwei sich in axialer Richtung erstreckende, den Dichtkörper (24) umfangsseitig umschließende Haltekrallen (36) aufweist, die einander in Umfangsrichtung mit Abstand benachbart zugeordnet und gleichmäßig in Umfangsrichtung verteilt angeordnet sind und dass die Stützwand (18) durch die Haltekrallen (26) gebildet ist.
- Ventilschaftabdichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Hülse (14) aus einem metallischen oder polymeren Werkstoff besteht.
- Ventilschaftabdichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Feder (26) aus einem polymeren oder metallischen Werkstoff besteht.
- Ventilschaftabdichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Hülse (14) in axialer Richtung zwischen der Stützwand (18) und dem Flansch (20) einen Radialversatz (30) aufweist.
- Ventilschaftabdichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Feder (26) einen im wesentlichen L-förmigen Querschnitt aufweist und dass der sich im wesentlichen in axialer Richtung erstreckende Schenkel der Feder (26) die erste Dichtlippe (28) in axialer Richtung vollständig überdeckt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/557,459 US5558056A (en) | 1995-11-14 | 1995-11-14 | Two-piece valve stem seal |
| US557459 | 1995-11-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0774568A1 EP0774568A1 (de) | 1997-05-21 |
| EP0774568B1 true EP0774568B1 (de) | 2002-02-20 |
Family
ID=24225493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96113464A Expired - Lifetime EP0774568B1 (de) | 1995-11-14 | 1996-08-22 | Ventilschaftabdichtung |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5558056A (de) |
| EP (1) | EP0774568B1 (de) |
| JP (1) | JPH09177522A (de) |
| KR (1) | KR100238502B1 (de) |
| CN (1) | CN1159506A (de) |
| AT (1) | ATE213521T1 (de) |
| BR (1) | BR9605566A (de) |
| CA (1) | CA2176662A1 (de) |
| DE (1) | DE59608757D1 (de) |
Families Citing this family (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19709170C2 (de) * | 1997-03-06 | 1999-11-04 | Cr Elastomere Gmbh | Abdichtung für hin- und hergehende Maschinenteile, insbesondere Ventilschaftabdichtung |
| US5775284A (en) | 1997-05-07 | 1998-07-07 | Freudenberg-Nok General Partnership | Two-piece valve stem seal |
| US6125810A (en) * | 1998-12-10 | 2000-10-03 | Caterpillar Inc. | Ceramic valve guide with two internal diameters |
| US6202616B1 (en) * | 1999-02-17 | 2001-03-20 | Briggs & Stratton Corporation | Valve seal assembly for an internal combustion engine |
| DE19950367C1 (de) * | 1999-10-19 | 2001-02-01 | Siemens Ag | Drucktaster mit federndem Dichtelement |
| US6205969B1 (en) | 1999-12-22 | 2001-03-27 | Dana Corporation | Multi-seal retainer assembly and method for making the same |
| JP4734712B2 (ja) * | 2000-12-19 | 2011-07-27 | Nok株式会社 | バルブステムシール |
| US6412467B1 (en) | 2001-04-24 | 2002-07-02 | Dana Corporation | Valve seal assembly module with spring and retainers |
| US6877749B2 (en) * | 2002-11-25 | 2005-04-12 | International Engine Intellectual Property Company, Llc | Seal for use with a movable rod |
| US6752398B1 (en) * | 2002-12-02 | 2004-06-22 | Dana Corporation | Valve stem seal assembly |
| US6938877B2 (en) * | 2003-07-02 | 2005-09-06 | Dana Corporation | Valve stem seal assembly |
| US6901902B1 (en) * | 2004-02-25 | 2005-06-07 | Freudenberg-Nok General Partnership | Two-piece valve stem seal |
| US7438036B2 (en) * | 2005-02-03 | 2008-10-21 | Dana Automotive Systems Group, Llc | Oil metering valve seal |
| KR100716359B1 (ko) * | 2005-08-02 | 2007-05-11 | 현대자동차주식회사 | 밸브스템실 장착 확인장치 |
| KR100733072B1 (ko) * | 2005-08-09 | 2007-06-27 | 한희선 | 열교환기용 쿨러헤드 및 제조방법 |
| US7533641B1 (en) | 2006-04-17 | 2009-05-19 | Jason Stewart Jackson | Poppet valve and engine using same |
| US7311068B2 (en) | 2006-04-17 | 2007-12-25 | Jason Stewart Jackson | Poppet valve and engine using same |
| DE102009017599B4 (de) * | 2009-04-16 | 2011-06-16 | Aktiebolaget Skf | Ventilschaftdichtung |
| US9500106B2 (en) * | 2009-05-20 | 2016-11-22 | Freudenberg—NOK General Partnership | Two-piece valve stem seal |
| US9416690B2 (en) * | 2009-07-30 | 2016-08-16 | Freudenberg-Nok General Partnership | Reduced inertia valve stem seal flange |
| EP2540999B1 (de) * | 2011-06-29 | 2014-07-09 | Caterpillar Motoren GmbH & Co. KG | Ventilschaftdichtung für einen Verbrennungsmotor |
| US9052018B2 (en) * | 2011-07-11 | 2015-06-09 | Dana Automotive Systems Group, Inc. | Eccentricity tolerant valve stem seal assembly |
| US8601991B2 (en) | 2011-08-02 | 2013-12-10 | Freudenberg-Nok General Partnership | Low profile valve stem seal in cylinder head |
| US9371749B2 (en) | 2012-02-08 | 2016-06-21 | Dana Automotive Systems Group, Llc | Hybrid valve stem seal retainer assembly |
| EP2626524B1 (de) * | 2012-02-08 | 2017-10-04 | Dana Automotive Systems Group , LLC | Hybride Halterungsanordnung einer Ventilschaftdichtung |
| US8893681B2 (en) * | 2013-03-07 | 2014-11-25 | Freudenberg-Nok General Partnership | Pressure support for engine valve stem seals |
| ITTO20130894A1 (it) * | 2013-11-04 | 2015-05-05 | Corcos Ind S A S Di Extern A Italia S R L | Guarnizione per una valvola di un motore a combustione interna |
| WO2017030060A1 (ja) * | 2015-08-20 | 2017-02-23 | Nok株式会社 | バルブステムシール及び密封構造 |
| WO2017106437A1 (en) | 2015-12-15 | 2017-06-22 | Dana Automotive Systems Group, Llc | Frustoconically supported valve stem seal assembly |
| IT201600106389A1 (it) | 2016-10-21 | 2018-04-21 | Freudenberg Sealing Tech S A S Di Externa Italia S R L U | Guarnizione per una valvola di un motore a combustione interna |
| US11326696B2 (en) * | 2017-06-26 | 2022-05-10 | Schaeffler Technologies AG & Co. KG | Seal for coolant control valve |
| JP7034753B2 (ja) * | 2018-02-19 | 2022-03-14 | Nok株式会社 | 密封装置および密封構造 |
| CN113710879B (zh) * | 2019-05-13 | 2024-08-16 | Nok株式会社 | 阀杆密封件 |
| CN113840978A (zh) * | 2019-05-27 | 2021-12-24 | Nok株式会社 | 阀杆密封件 |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2157865A (en) * | 1935-07-02 | 1939-05-09 | Wilkening Mfg Co | Packing device |
| US2207400A (en) * | 1939-12-19 | 1940-07-09 | Gass Harold | Valve stem packing |
| US2418674A (en) * | 1943-11-06 | 1947-04-08 | Wright Acronautical Corp | Valve stem construction |
| US3162185A (en) * | 1962-06-08 | 1964-12-22 | Ford Motor Co | Valve stem oil seal |
| US3306621A (en) * | 1964-03-17 | 1967-02-28 | Garlock Inc | Valve stem seal |
| US3554562A (en) * | 1967-06-21 | 1971-01-12 | Gen Motors Corp | Valve stem seal assembly |
| US3554182A (en) * | 1968-11-14 | 1971-01-12 | Francis M Whitacre | Liquid heater especially adapted for liquid submerged use |
| US3554180A (en) * | 1969-03-21 | 1971-01-12 | Gen Motors Corp | Valve stem seal |
| FR2459933A1 (fr) * | 1979-06-27 | 1981-01-16 | Renault | Joint d'etancheite de passage d'une tige coulissante dans une douille de guidage |
| JPS59173510A (ja) * | 1983-03-19 | 1984-10-01 | Honda Motor Co Ltd | 四サイクル内燃機関のバルブステム・シ−ル |
| DE3610534A1 (de) * | 1986-03-27 | 1987-10-01 | Porsche Ag | Ventilfuehrung fuer ein abgasventil einer brennkraftmaschine |
| EP0333961A1 (de) * | 1988-03-25 | 1989-09-27 | Abg Semca S.A. | Dichtungsring für Kolben |
| US4822061A (en) * | 1987-10-02 | 1989-04-18 | K-Line Industries, Inc. | Valve seal retainer |
| DE3907001A1 (de) * | 1988-05-13 | 1989-11-23 | Goetze Ag | Montagevorrichtung fuer ventilfederteller von brennkraftmaschinen |
| US5017024A (en) * | 1988-07-27 | 1991-05-21 | Clark Paul H | Seal assembly |
| FR2645937B1 (fr) * | 1989-04-12 | 1991-08-30 | Peugeot | Dispositif pour le guidage et l'etancheite d'une soupape |
| US4909202A (en) * | 1989-06-30 | 1990-03-20 | Dana Corporation | Frustoconical valve stem sealing element |
| US4947811A (en) * | 1989-06-30 | 1990-08-14 | Dana Corporation | Floating valve stem seal |
| US5110142A (en) * | 1990-11-30 | 1992-05-05 | Macrotech Fluid Sealing, Inc. | Valve stem oil seal |
| US5174256A (en) * | 1991-11-25 | 1992-12-29 | Dana Corporation | Variable guide height valve seal |
-
1995
- 1995-11-14 US US08/557,459 patent/US5558056A/en not_active Expired - Lifetime
-
1996
- 1996-05-15 CA CA002176662A patent/CA2176662A1/en not_active Abandoned
- 1996-08-22 EP EP96113464A patent/EP0774568B1/de not_active Expired - Lifetime
- 1996-08-22 AT AT96113464T patent/ATE213521T1/de not_active IP Right Cessation
- 1996-08-22 DE DE59608757T patent/DE59608757D1/de not_active Expired - Lifetime
- 1996-10-25 CN CN96122663A patent/CN1159506A/zh active Pending
- 1996-11-12 JP JP8300401A patent/JPH09177522A/ja active Pending
- 1996-11-13 KR KR1019960053590A patent/KR100238502B1/ko not_active Expired - Fee Related
- 1996-11-14 BR BR9605566A patent/BR9605566A/pt not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| ATE213521T1 (de) | 2002-03-15 |
| KR100238502B1 (ko) | 2000-01-15 |
| KR970027655A (ko) | 1997-06-24 |
| CN1159506A (zh) | 1997-09-17 |
| JPH09177522A (ja) | 1997-07-08 |
| DE59608757D1 (de) | 2002-03-28 |
| EP0774568A1 (de) | 1997-05-21 |
| BR9605566A (pt) | 1998-08-18 |
| CA2176662A1 (en) | 1997-05-15 |
| US5558056A (en) | 1996-09-24 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| AK | Designated contracting states |
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| 17P | Request for examination filed |
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| 17Q | First examination report despatched |
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| RTI1 | Title (correction) |
Free format text: VALVE STEM SEALING ARRANGEMENT |
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| GRAG | Despatch of communication of intention to grant |
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| GRAG | Despatch of communication of intention to grant |
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| GRAH | Despatch of communication of intention to grant a patent |
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| GRAH | Despatch of communication of intention to grant a patent |
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| RTI1 | Title (correction) |
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