CN1162708A - Improved seal with embedded garter spring - Google Patents
Improved seal with embedded garter spring Download PDFInfo
- Publication number
- CN1162708A CN1162708A CN 97103062 CN97103062A CN1162708A CN 1162708 A CN1162708 A CN 1162708A CN 97103062 CN97103062 CN 97103062 CN 97103062 A CN97103062 A CN 97103062A CN 1162708 A CN1162708 A CN 1162708A
- Authority
- CN
- China
- Prior art keywords
- sealing
- spring
- garter spring
- lip body
- radially
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 91
- 230000036316 preload Effects 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 229920001971 elastomer Polymers 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- 230000008602 contraction Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 5
- 239000000806 elastomer Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 4
- 238000000429 assembly Methods 0.000 claims 4
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000009434 installation Methods 0.000 claims 2
- 239000013536 elastomeric material Substances 0.000 claims 1
- 238000005253 cladding Methods 0.000 description 8
- 230000014509 gene expression Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Images
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Abstract
A sealing member includes a casing unit and an elastomeric lip body portion. Frustoconical air and oil side surfaces of the lip body meet at an inner diameter portion to form a fluid seal band contacting an associated shaft in use. A continuous, circumferentially extending garter spring is embedded in the seal lip body. An axially inner surface of the lip body is defined in part by plural spaced apart ribs and the remainder is defined by pockets having portions lying closely adjacent the radially and axially innermost portions of the garter spring. In the free state of said seal, the garter spring exerts a radially inwardly directed preload force so as to resist radial expansion of said seal. The spring also resists dimensional shrinkage of the seal band and the remainder of the sealing member.
Description
The present invention relates to be used to make the improved method and apparatus of fluid seal.This method and apparatus has overcome and has had at fluid seal,, has the existing issue of the Sealing of the so-called embedded garter spring in the lip body portion of Sealing of sealed lip of a housing and an elastic material that is.
In most of seal configurations, garter spring has increased the radial load that the elasticity by the sealing lip body provides.Spring is located in the groove that is molded in the lip body.In some Sealing, exist annular spring to collapse a difficult problem of promptly separating with the remaining part of Sealing always.
Someone once proposed garter spring and can be embedded in the Sealing to guarantee that it does not break away from it position should be arranged.But the location of spring in mould in use causes unsettled effect.Because the power that forms in molded is very big, spring has the tendency of itself locating once more sometimes.The rubber that flows can make garter spring remove from its due use position, causes the off-centre of spring to embed.
According to the present invention, can provide a kind of artificer of making accurately to determine the spring space of garter spring with respect to the position of die cavity.Therefore, spring can occupy desirable position in finished product.
In addition, suitably the spring of location can be used for obtaining following advantage,, makes the different Sealing of actual size in identical seal mold that is.
Have been found that if, so just can limit the contraction of inner seal diameter (I.D.) leaving sealing strip suitably apart from the interior garter spring that in seal body, embeds.Also find equally, make spring make the spring preload just not only spring can be placed on the appropriate location in placed under tension, and can totally control the radial load characteristic of Sealing by changing preload, spring diameter and spring silk size.
Consequently, can use identical mould production to have the Sealing of different molded internal diameters and different preloads and residual interference variation.
Because all make different moulds in the slightly different size of many large diameter seals each, its cost is difficult to bear, so method and apparatus of the present invention can be made the spending of new die and the Sealing that can be suitable for many different application occasions is provided.
The present invention includes provides a kind of mould, this mould has a mould part, it comprises the part of a part that is suitable for forming the sealing lip body, the part of this lip comprises the empty G﹠O of truncated cone shape side, it is joined to form a sealing strip, it also comprise be suitable for the location and support annular helical spring other parts, these parts comprise a plurality of pins spaced apart that stretch into die cavity.
In addition, the invention provides a kind of Sealing manufacture method, this method is included in pre-aligned and tensioning one garter spring in the seal mold, inject die cavity to form Sealing with the curable elastic material that flows then, Sealing has the garter spring that embeds at least in part, has the character that needs of deflection and memory.
Brief Description Of Drawings is as follows:
Fig. 1 is the stereogram of Sealing made in accordance with the present invention;
Fig. 2 is the partial perspective view of amplifying, and represents the part of Sealing shown in Figure 1, the contiguous part of making the mould of sealing part of this part;
Fig. 3 is the vertical sectional view of amplification of a part of Sealing of making the equipment and mold of Sealing;
Fig. 4 is the vertical sectional view of the part of Sealing shown in Figure 3 and mould, the Sealing that is illustrated in the mould of open position and partly unloads from mould;
Fig. 5 is the vertical sectional view of the part of Sealing of the present invention;
Fig. 6 is the vertical sectional view of another part of Sealing of the present invention;
Fig. 7 is the end elevation along the part of the mould 7-7 line, that be used to form Sealing of the present invention of Fig. 4;
Fig. 8 is the local amplification view along the part 8-8 line, mould of the present invention of Fig. 7;
Fig. 8 A is to use the part schematic sectional view of the Sealing of the present invention that part of seal mold shown in Figure 8 makes;
Fig. 9 is the partial sectional view along the part 9-9 line, mould of the present invention of Fig. 7;
Fig. 9 A is the diagrammatic cross-section fragmentary with the part of the Sealing of that part manufacturing of mould shown in Figure 9;
Figure 10 is the sectional view of a modification of spring space of the present invention;
Figure 11 is the view that is similar to Fig. 7, but expression is by the pin and the garter spring of locating under initial tension is preload;
Figure 12 is the schematic representation of a kind of modification of the spring space that uses of expression the present invention.
One or more forms that Sealing are described below and are used to produce the molding equipment of Sealing.
Fig. 1-4 represents a black box 10, and it comprises that the rigid crust portion 12 of a steel or similar material, axial ledge 14, radial flange 16 and one can reduce the available end crimping 18 that thickness is made by case material.Shell portion 12 is almost entirely surrounded by an elastomer 20.Elastomer 20 comprises the 22 and annular axial lip internal surface caps 26 of annular external diameter lid that have outer attachment face 24.Two surfaces 24,26 are engaged by an axial inner ends surface 28.
The garter spring 38 of an extending circumferentially is embedded with a sealing lip body 30.Garter spring 30 preferably one has the radially garter spring of outmost surface, this radially outmost surface covered other place by a thin rubber plate portion and then coat by the rubber of thicker mode cross section.
Spring space enters surface 42,44 and form L shaped bag 46 in lip body 30.Each bag 46 and adjacent bag 46 rib 48 of being separated by.Bag is 46 uncovered towards the oily side of Sealing with the relation of axially facing, rib radially outer spring cap surface 40 and oily side 32 begin substantially radially extend between the place, these ribs form the axial inner ends face 50 of lip body 30 jointly.The meaning of " axially in " is to be seal area towards oily side, and the meaning of " axially outer " is promptly to deviate from seal area towards air side.
Fig. 8 A is illustrated in bag 46 formation place, and it is minimum that the rubber of garter spring covers, and, on the axial penetrale of garter spring 38 thin rubber cladding 60 is arranged that is, and same thin rubber cladding 62 is arranged on the radially penetrale of spring 38.Fig. 9 A represents that cladding 60 and 62 has more tangible, thicker elastic material.This is because have the rib 48 that extends and make its joint between surface 32,40 herein.Thinner at bag 46 formation place claddings 60,62.
The sealing lip body 30 that Fig. 2-6 expression is limited by surface 32,34,40,50 is connected in the radially penetrale 59 of housing radial flange 18 by a flex section 64.In Fig. 2, the housing radial flange is also covered by the rubber exterior edge face cladding 66 that has recess 68.
Fig. 3 and 4 schematically represents a kind of mould of making Sealing by step of the present invention.Fig. 2 and die assembly 100 of 3 expressions, it comprises the Embedded Division 102 on a top, core 104 and outer portion 106 of a bottom.When complete closure (Fig. 3), the above-mentioned part of die assembly 100 constitutes a die cavity, surrounds housings 12 and molded seals with elastomer 20 therein.
In Fig. 3 and 4, the core 104 of bottom comprises an annular end face profiled surface 108, and it has circumferentially boss 110 spaced apart, so that form recess on the exterior edge face of Sealing cladding 66.The core 104 of bottom also comprises the face 112 that inclines, and its part constitutes a surface of flex section 46.Surface 114 constitutes the air side 34 of Sealing, and another frusta-conical surface 116 constitutes a part of oily side 32 of lip body 30.Above-mentioned surface forms recess 118 places at a sharp-pointed sealing strip and joins.The ring portion 106 of die assembly 100 comprises a radially outermost profiled surface part 120 that is used to form outside seal attachment face 24.
The Embedded Division 102 on top comprises the annular surface 122 and the big shoulder 124 that are suitable for forming the axial inner ends face 28 of Sealing, and the inner radial 126 of shoulder forms radially outer spring cladding surface 39 on the Sealing of making.
Fig. 2 and spring space 128 of 4 expressions, it is made of a plurality of spaced apart, L-shaped substantially pins 130, and each pin comprises a radial legs 132 and an axial shank 134, is used to contact and support the surface portion of garter spring 38.The length of each shank 132,134 of pin 130 equals the screw diameter of spring 38.
In large diameter seals, the length of the shank 132,134 of each pin 130 is about 0.230 to about 0.250 inch, and the width of pin (circumferentially) is about 0.10 inch, and rib has approximately identical width.Therefore, on the Sealing size of inch, can have about five bags and five ribs weekly.
In Fig. 2 and Fig. 9 A, not having the position of above-mentioned pin 130 at the Embedded Division 102 of mould is flat fully surfaces 136.Will there be recess 46 at position at the pin 130 with the radial component that forms lip body 30 on the Sealing of making, on the Sealing that does not have pin 130 to be in to make rib 48 will be arranged.In large diameter seals (23 inches of external diameters), hundreds of about 0.100 inch bag and rib will be arranged.
About method of the present invention, garter spring 38 is to be engaged and is formed annular spring by the helical spring that is cut into suitable length, and it is placed on the pin 130 in the die assembly 100 and leans on the elasticity of himself to remain there.When selecting the location, spring 38, the rubber that flows is pressed in the die cavity that is limited by above-mentioned die surface two-part (102,104) closure of mould.
In when sulfuration, the Sealing of making like this has a rubber outside diameter and one fully or almost completely by the spring of rubber cladding.In some part of spring, see through the profile that thin residual tablet can be seen spring.Rib 48 covers the remaining part of spring.About method of the present invention, make a Sealing test specimen that is not embedded with garter spring, the Sealing of itself and Figure 10 is alike.In the instrument equipment of Sealing, the lip of die cavity forms the internal diameter that the surface has 3.000 inches.In free state, in this mould, make, do not have the Sealing of spring to shrink 0.071 " to 2.929 " (internal diameter).Then, use Fig. 2 to make the Sealing that others are identical with the sort of mould shown in 11, spring 38 is formed a continuous ring, measure its assembling internal diameter (" A.I.D. ") and with its placement and on the axial shank 134 that remains on pin 130 under the spring tension effect.Use the assembling internal diameter to differ 0.020 " garter spring make other several Sealing, all springs are acting on tension force on the pin of mould be preload.
In all scenario that uses garter spring, even used spring has the effect that increases seal radial rigidity, initial contraction also reduces.The contraction of Sealing of spring that use has minimal fitting internal diameter (thereby having maximum preload) is bigger than the contraction of Sealing that those have less preload.Yet, the spring of any embedding, even the spring of preload, the free state internal diameter that also can make Sealing is greater than the Sealing that does not have spring.In the Sealing of 3 inches internal diameters, depend on the setting and the preload thereof of spring, its internal diameter is from about 2.929 inches to 3.00 inches variations.
Test shows that radial load can obtain sizable variation.The internal diameter of test axle is 3.00 inches, also makes several other test axles.Each is all big 0.020 inch than another.Use the spring of same line footpath and size, just change its preload, that is, the assembling internal diameter can form radial load like this and change on a large scale.Some Sealings form axle circumference per inch less than 1 ounce radial load, and the radial load of other Sealings is then greater than circumference per inch 32 big bellys of axle.The variation that has spring and do not establish the molded internal diameter of spring almost reaches 0.070 inch in the Sealing of one 3 inch diameter.The effect that spring is set is: it is big 0.035 inch but be provided with half of Sealing of garter spring that no spring and molded interference is that the radial load of the Sealing of 0.070 inch of nominal only reaches.No spring and interference be 0.70 Sealing radial load roughly be provided with spring, interfering only is that 0.010 inch Sealing is identical.In the situation of spring was set, radial load was along with the increase of test shaft diameter can increase much more sharply.Therefore, the ability of the raising radial load of spring can be utilized, and the preload that is added in the mill on the spring can be used at first the size of Sealing be determined on predetermined value.Make large diameter Sealing and need expensive equipment, and not needing of the less variation of new fully mould with size, the notable change of the Sealing size when molded can realize simply by the assembling internal diameter that changes the garter spring that suitably is positioned at the embedding in the Sealing lip body.
The Sealing that needs same size with the situation that produces different radial loads in, the degree of preload can change.The spring that embeds can provide the resistance of outside distortion, and the resistance that rubber is shunk also can be provided.Contraction when a mould can utilize the spring of different assembling internal diameters to control depanning.The size of internal diameter when using identical moulds of the spring of three kinds of different assembling internal diameters to change the Sealing depanning, form the original dimension difference with relevant different molded interference.Adopt the present invention can determine the performance of Sealing in advance.
Some die springs positioning work piece comprises each pin 130 that forms a ring.Figure 12 represents that each car pin 130b can be used as above-mentioned pin, and each pivot pin comprises that a cylindrical shank 131b and radial outward are used for the flat 133b of portion of engagement annular helical spring 38b.The Embedded Division 102b of mould comprises an opening 135b who establishes for shank 131b.
In fact, flat in other embodiments 133b of portion and radial surface 137b constitute the mating member 134B of the shank of positioning work piece, 136b.
On the surface of some pin, can make reverse incline (Figure 10).Wherein, the interior tip 135 diameter pins of shank 134a are greater than surperficial 151a.This just makes spring be held in place when forming Sealing, and reverse incline or undercutting can not hinder the removal of pin when taking out from mould.Equally, the whole spring mating face of the pin 130 in Fig. 8 can be as shown in the figure, but tilts slightly.
Fig. 8 represents to make the method for a kind of recommendation of pin.Mould is shaped on a continuous shoulder that stretches into die cavity at first.After forming shoulder, make the radial slot of the end face of a plurality of and mould, thereby make single continuous shoulder become a plurality of independent pins.In the embodiment of Figure 12, do not need above-mentioned steps, because this embodiment is provided with a series of holes simply on die face; And the shank of the bearing pin of support spring is pressed in the hole that is arranged to circular trace.
Claims (11)
1. fluid seal assemblies, mode with combination comprises that one has axially and the shell body device of radial flange, and the empty G﹠O side of the truncated cone shape of joining on path portion that included is so that form elastomeric lip body portion with the relevant fluid-tight band that touches of being coupling at work, the garter spring of one continuous extending circumferentially is embedded in the described lip body, the axial inner surface portion ground of described lip body is limited by a plurality of ribs spaced apart, remaining part is then limited by the bag that has near the part of the radial and axial penetrale of described garter spring, described lip body portion is connected in the inner radial of the radial flange of described housing by the flexible neck of a thin radial cross-section, in the free state of described black box, described garter spring applies a radially inner preload power to stop the radial dilatation of described black box, elastomeric material comprises and radially inwardly acting on the described spring so that described spring is in radially press described lip body under the load effect that described spring also stops the dimensional contraction of described sealing strip.
2. fluid seal assemblies as claimed in claim 1 is characterized in that: the axial ledge of described housing is provided the cylindrical rubber structure of radially outer cylindrical installation surface to coat by one.
3. fluid seal assemblies as claimed in claim 1 is characterized in that: described bag is basic to be L shaped structure.
4. fluid seal assemblies as claimed in claim 1 is characterized in that: whole described housing is comprised that substantially fully the same elastomer material of described lip body portion surrounds.
5. Sealing forming die assembly, mode with combination comprises that at least two can opened, close the seal mold part that moves between the position, it is used for admitting therein a Sealing housing, each described mould part has a plurality of annular surfaces, all these surfaces limit a die cavity in the operating position of described mould together, described surface comprises those surfaces that are suitable for forming a Sealing lip body, described Sealing lip body comprises a radially lip surface of outermost, part is radially inner, the empty G﹠O of the truncated cone shape side that can synthesize a sealing strip, a flexible neck that described lip body is connected in described housing, one of described mould part also comprises a garter spring positioning work piece, described garter spring positioning work piece comprises the pin that a plurality of roughly circumferential tight spacings in the described lip body that axially stretches into described die cavity forms partly come, they are positioned at garter spring in the described die cavity, described pin has the radially outer surface that prevents that described garter spring from radially moving inward of being used to, and be useful on the surface of radially extending at least in part of described garter spring axially locating, thereby when described mould part is closed, described garter spring is positioned among the described lip body, spaced apart with its radially-outer surface and axial internal surface, when opening mould, described pin is recalled from described die cavity, thereby forms the uncovered bag of a plurality of adjacent settings in the described seal band area of the described lip body part outside radially.
6. Sealing forming die assembly as claimed in claim 5 is characterized in that: the surface that limits described die cavity comprises the surface of the external diameter installation surface that is formed on the described Sealing.
7. Sealing forming die assembly as claimed in claim 5 is characterized in that: the surface that limits described die cavity comprises the surface that surrounds described Sealing housing fully, thereby its all surfaces wraps in the elastomer that is used to form described Sealing finished product.
8. die assembly as claimed in claim 5, it is characterized in that: described garter spring positioning work piece comprises the L-shaped substantially pin that many circumferential tight spacings come, and each described pin has an axle spring bearing surface and a spring positioning surface that radially extends.
9. die assembly as claimed in claim 8 is characterized in that: described pin comprises axially extended substantially spring engaging surface, and this surface has contrary inclined-plane so that make described garter spring location reliably.
10. die assembly as claimed in claim 5, it is characterized in that: described garter spring positioning work piece comprises a plurality of axially extended substantially alignment pin, each described bearing pin have the part that is suitable for engaging described garter spring axially and the surface portion that radially extends.
11. the method for a forming fluid Sealing, said method comprising the steps of: form relatively-movable mould part, described mould part has the surface that limits the profile of an oil seal in its operating position, described Sealing comprises that one has along the empty G﹠O of truncated cone shape side that a circular trace is joined to form the sealing lip body with the relevant sealing strip that touches of being coupling, and limit outermost annular lip body portion radially and described lip body is connected in the additional surface of flexible neck of the remaining part of described Sealing, described method comprises pre-tensioning on the radially outer surface of the pin that makes circumferentially continuous a plurality of circle distribution of garter spring in being located at described die cavity, the location keeps tension force on described garter spring then; When making described spring on described pin, act on radially inner power, inject the curable elastic material that flows to described mould, keep the location of described garter spring on described pin simultaneously, described elastic material is solidified, withdraw from described pin so that form a plurality of bags spaced apart at the axial internal surface of described Sealing lip body from described die cavity then, described garter spring is positioned in the described lip body and acts on one and tends to stop described sealing strip enlarged-diameter, radially inner power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97103062 CN1162708A (en) | 1996-03-08 | 1997-03-07 | Improved seal with embedded garter spring |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US613,159 | 1984-05-23 | ||
| CN 97103062 CN1162708A (en) | 1996-03-08 | 1997-03-07 | Improved seal with embedded garter spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1162708A true CN1162708A (en) | 1997-10-22 |
Family
ID=5166530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97103062 Pending CN1162708A (en) | 1996-03-08 | 1997-03-07 | Improved seal with embedded garter spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162708A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423457A (en) * | 2012-05-18 | 2013-12-04 | 弗罗伊登贝格-诺克普通合伙公司 | Low load seal with outer diameter flap |
| CN104165648A (en) * | 2013-05-15 | 2014-11-26 | 株式会社三丰 | Dustproof member and measurement device |
| CN104626407A (en) * | 2015-02-05 | 2015-05-20 | 哈尔滨东安实业发展有限公司 | Inner wrapped spring-loaded oil seal mould and method for moulding inner wrapped spring-loaded oil seal by utilizing same |
| CN106182504A (en) * | 2016-09-22 | 2016-12-07 | 成都盛帮特种橡胶制品有限公司 | A kind of encapsulated spring-loaded oil seal mould structure and production technology |
-
1997
- 1997-03-07 CN CN 97103062 patent/CN1162708A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423457A (en) * | 2012-05-18 | 2013-12-04 | 弗罗伊登贝格-诺克普通合伙公司 | Low load seal with outer diameter flap |
| CN104165648A (en) * | 2013-05-15 | 2014-11-26 | 株式会社三丰 | Dustproof member and measurement device |
| CN104165648B (en) * | 2013-05-15 | 2018-10-19 | 株式会社三丰 | Dustproof element and measuring apparatus |
| CN104626407A (en) * | 2015-02-05 | 2015-05-20 | 哈尔滨东安实业发展有限公司 | Inner wrapped spring-loaded oil seal mould and method for moulding inner wrapped spring-loaded oil seal by utilizing same |
| CN106182504A (en) * | 2016-09-22 | 2016-12-07 | 成都盛帮特种橡胶制品有限公司 | A kind of encapsulated spring-loaded oil seal mould structure and production technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU722295B2 (en) | Seal with embedded garter spring | |
| US4206930A (en) | Circumferentially compressed piston ring assembly and method | |
| CA1301785C (en) | Air spring having internal sealing band and method of installing same | |
| CN1273759C (en) | Main sealing device for piston rod or piston | |
| CN1073214C (en) | Oil seals and method of making thereof | |
| EP0646738B1 (en) | Fluid sealing means | |
| RU2403475C2 (en) | Composite high-temperature dynamic sealing, and manufacturing method thereof | |
| EP1924792B1 (en) | Radial seal and method of making | |
| AU649485B2 (en) | Live load packing system | |
| EP0020719A1 (en) | Shaft seal with retractable polytetrafluoroethylene-lined sealing lip | |
| GB2230295A (en) | Ball joint | |
| EP1691126B1 (en) | Sealing mechanism for tubular body | |
| US4468042A (en) | Anti-extrusion sealing device with interlocked retainer portions | |
| US20050173869A1 (en) | Spark plug tube seal | |
| US20020130472A1 (en) | Seal member mounted between cylinder head cover and lgnition plug tube | |
| CN101440872A (en) | Sealing device for reciprocating shaft | |
| CN1006657B (en) | Valve and its improvement of automatically assembling method | |
| US8029714B2 (en) | Radial seal and method of making | |
| CN1040667A (en) | Seal ring | |
| CN1162708A (en) | Improved seal with embedded garter spring | |
| EP0733177B1 (en) | Machined shaft seal encased in an elastomeric sleeve | |
| EP1266158B1 (en) | High pressure seal | |
| US9067346B2 (en) | Seal and procedure for its production | |
| US4660839A (en) | Endless backup ring for hydraulic apparatus seal | |
| KR870006341A (en) | Sealing or Packing by Self Force |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |