CN102042209A - Sealing arrangement for pump piston of piston pump - Google Patents
Sealing arrangement for pump piston of piston pump Download PDFInfo
- Publication number
- CN102042209A CN102042209A CN2010105041090A CN201010504109A CN102042209A CN 102042209 A CN102042209 A CN 102042209A CN 2010105041090 A CN2010105041090 A CN 2010105041090A CN 201010504109 A CN201010504109 A CN 201010504109A CN 102042209 A CN102042209 A CN 102042209A
- Authority
- CN
- China
- Prior art keywords
- ring
- seal
- guide ring
- pump piston
- pump
- 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 title claims abstract description 33
- 238000000034 method Methods 0.000 claims description 45
- 230000035515 penetration Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 238000001746 injection moulding Methods 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0439—Supporting or guiding means for the pistons
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Sealing Devices (AREA)
Abstract
The present invention relates to a sealing arrangement for a pump piston (16) of a piston pump (10). The sealing arrangement has a flexible sealing ring (24) and a neighboring rigid protection ring (202 for the sealing ring (24) or a neighboring rigid guide ring (20) for a pump piston (16). The sealing ring (24) is formed in single-piece with the protection ring (22) or guide ring (20) by an injection molding method.
Description
Technical field
The present invention relates to the seal arrangement especially for the pump piston of the reciprocating pump of braking system, the sealing device has elastic sealing ring and is used for the rigid support ring of sealing ring or is used for the rigidity guide ring of pump piston.In addition, the invention still further relates to the method for the seal arrangement on a kind of pump piston that is used to make reciprocating pump.
Background technique
The reciprocating pump of the above-mentioned type is applied in the brake system of car, so that controllably provide retardation pressure for the function that realizes anti-lock braking system or driving dynamics control system on corresponding master cylinder there.Control to retardation pressure realizes that by pump piston described pump piston is carried brake fluid through pumping cylinder for this reason.
Seal arrangement is between pump piston and pumping cylinder.According to WO 2008/015071A1, such seal arrangement comprises elastic sealing ring, and supporting ring axially is being positioned at described seal ring next door.Guide ring is positioned at the supporting ring next door.Supporting ring should prevent in reciprocating pump work that seal ring is forced into the zone between guide ring and the piston.Described guide ring leads to pump piston in the to-and-fro motion process and has for the necessary gap of motion with respect to pump piston at this.
In view of reliability and durability, as the braking system other parts are proposed, high request has been proposed also such seal arrangement.Simultaneously, in automobile making, also exist cost pressure generally, thereby also just should produce this class seal arrangement at low cost.
Summary of the invention
According to the present invention, realized a kind of seal arrangement of pump piston of reciprocating pump, described seal arrangement comprises elastic sealing ring and adjacent rigid support ring or adjacent rigidity guide ring, and in described seal arrangement, seal ring and supporting ring or guide ring constitute one by Shooting Technique.
By solution of the present invention, seal ring and supporting ring or guide ring link into an integrated entity, thereby form a unique black box altogether.This black box compare with existing solution can be more simple and thus cost more install in the lowland, in described existing solution, seal ring and supporting ring or guide ring assemble one by one.In addition, in the sort of mode of execution that seal ring directly is injected on the guide ring, can save supporting ring fully.
Seal ring preferably is set to square ring (the roughly rectangular and seal ring have the circular seal projection respectively on its each angle of cross section) or asymmetric seal ring.Just in asymmetric seal ring, can realize identification by solution of the present invention to directed mounting point, and expending of for this reason need not to add.That is to say, in seal arrangement of the present invention, can for example supporting ring and seal ring be designed to different colors very simply, thereby only just can realize location recognition based on consequent color distinction.But, be not essential about the independent recognition feature of the directed mounting point of seal ring according to the present invention.In addition, mentioned as mentioned, saved at least one parts by assembly parts of the present invention, the operation in this also feasible assembling expends and is reduced.
First of seal arrangement kind of favourable improvement project according to the present invention, supporting ring or guide ring are designed to have at least one undercut portions, make in the Shooting Technique material of seal ring can arrive the back of undercut portions.
Make seal ring embed to a certain extent in supporting ring or the guide ring by this improvement project.Realized that with seldom expense the endurance surpasses that stable shape is connected between the seal ring of seal life and supporting ring or the guide ring thus.
In addition, also realized a kind of seal arrangement of pump piston of reciprocating pump according to the present invention, described seal arrangement has elastic sealing ring and adjacent rigid support ring or adjacent rigidity guide ring, in described seal arrangement, seal ring is pre-assembled on supporting ring or the guide ring by press-loading process.
Similarly, no longer need to be used for the independent recognition feature that forms of need of seal ring by this solution of the present invention.But realize assembly parts with low-down cost, this assembly parts can be bought and is mounted in the reciprocating pump subsequently by supplier after precheck.
Second of seal arrangement kind of favourable improvement project according to the present invention, seal ring is designed to have at least one penetration hole, makes to be used for seal arrangement is pressed onto being pressed into drift and can rabbeting penetration hole on the reciprocating pump.
With regard to no longer needing once also assembling more reliably of work is operated and can be realized altogether to supporting ring or guide ring and seal ring separately by this improvement project.When being pressed into, being pressed into drift and passing penetration hole and press to and be pressed into supporting ring or the guide ring that pulls to oneself in the reciprocating pump housing and with seal ring subsequently.At this, insert seal ring than more favourable with the mode of the pressing seal ring of packing into till order in the mode of drawing.
In addition, according to the present invention, also realized a kind of seal arrangement of pump piston of reciprocating pump of particularly the above-mentioned type, the sealing device has elastic sealing ring and adjacent rigid support ring or adjacent rigidity guide ring, in this seal arrangement, seal ring is designed to have step, and described step is used for arranging supporting ring or guide ring thereon, and seal ring has seal section at radial outside on the step next door, and described seal section opens and covers on the supporting ring.
By step of the present invention, the covering of the seal ring geometrical construction by top is opened and has been realized the particularly automatic calibration of supporting ring, even has also improved this calibration.Gu Ding seal ring is pressed to pump piston with supporting ring and has been prevented owing to supporting ring calibrated the damage that produces again at this like this.
According to the present invention, also realized the method for the seal arrangement on a kind of pump piston of making reciprocating pump, this method comprises the following steps: to make seal ring and supporting ring or guide ring constitute one by rigid material supporting ring or guide ring with by Shooting Technique.
According to first kind of the inventive method favourable improvement project, when making supporting ring or guide ring, supporting ring or guide ring formed have at least one undercut portions, make that in Shooting Technique the material of seal ring can arrive the back of undercut portions.
In addition, also realized making the method for the seal arrangement on the pump piston of reciprocating pump according to the present invention, this method comprises the following steps: by rigid material supporting ring or guide ring with by press-loading process or clamping technology seal ring to be pre-assembled on supporting ring or the guide ring.
According to second kind of the inventive method favourable improvement project, when forming seal ring, seal ring formed have at least one penetration hole, and when being pressed onto seal arrangement on the reciprocating pump, be pressed into drift and rabbet in the described penetration hole.
According to the present invention, also realized the method for the seal arrangement of the described pump piston that is used to make reciprocating pump of a kind of special as above-mentioned process, the sealing device has elastic sealing ring and rigid support ring or rigidity guide ring, this method comprises the following steps: seal ring formed has the step that is used for arranging supporting ring or guide ring thereon, make seal ring have seal section at radial outside on the step next door, described seal section opens and covers on supporting ring or the guide ring.
The advantage of Shi Xianing is identical with those advantages of mentioning at seal arrangement of the present invention by this method.
Description of drawings
To be described in detail by means of the embodiment of appended schematic representation below solution of the present invention.Among the figure:
Fig. 1 shows the reciprocating pump of braking system with the part longitudinal section, and this reciprocating pump comprises first kind of mode of execution according to the seal arrangement of prior art,
Fig. 2 shows second kind of mode of execution according to the seal arrangement of prior art with longitudinal section,
Fig. 3 with the three-dimensional view that cuts show seal arrangement according to first kind of embodiment of the present invention,
Fig. 4 shows the guide ring of the seal arrangement of Fig. 3 with three-dimensional view,
Fig. 5 shows the seal ring of the seal arrangement of Fig. 4 with three-dimensional view,
Fig. 6 shows the seal ring according to second kind of embodiment of the present invention of seal arrangement with the three-dimensional view that cuts,
Fig. 7 shows the seal arrangement as Fig. 6 that comprises seal ring and supporting ring with the three-dimensional view that cuts,
Fig. 8 shows the seal ring according to the third embodiment of the present invention of seal arrangement with the three-dimensional view that cuts,
Fig. 9 shows the seal arrangement as Fig. 8 that comprises seal ring and supporting ring with the three-dimensional view that cuts, and
Figure 10 shows the flow chart of the inventive method.
Embodiment
Fig. 1 shows the partial view of reciprocating pump 10, and described reciprocating pump comprises housing 12 and the eccentric wheel 14 that is rotatably supported in the described housing.The pump piston 16 that can move in the cylinder hole is close on the eccentric wheel 14.Described pump piston 16 is directed in guide ring 20 when this moving movement, and described guide ring is embedded in the cylinder hole 18 and by rigid material (here being plastics) and makes., be provided with gap or certain distance between guide ring 20 and the pump piston 16 here, this makes this relative movement of pump piston 16 almost not rub, but still can accurately lead to pump piston 16.
Except this rigidity guide ring 20, also will be that the supporting ring 22 and the flexible seal ring 24 of rigidity is set on the pump piston 16 equally.Described seal ring 24 here is to be constituted square ring and sealed between pump piston 16 and housing 12 in cylinder hole 18 by elastomer.Described supporting ring 22 is close on the pump piston 16 hermetically, and should prevent that seal ring 24 from moving to below the guide ring 20 when pump piston 16 motions.In such moving, may cause damage to seal ring 24.This may form " biting " (Knabberschaeden) on seal ring.
Fig. 2 shows the seal ring 24 according to prior art, and described seal ring is designed to so-called asymmetric seal ring.This means that sealing ring 24 that sealing strip towards pump piston 16 on cross section is not symmetrical fully, but have a steeply inclined side 26 gentle oblique sides 28 with replacing.Can when moving, pump piston 16 have by steeply inclined side 26 gentle oblique sides 28 at the motion of ground startup oiling agent on pump piston 16.On the seal ring 24 in Fig. 2, formed a lug boss 30 on the right side, described lug boss is arranged for the location recognition feature of asymmetric seal ring 24 when assembling.
On this seal ring 24 next doors, under mounted state, be also to be provided with supporting ring 22 and guide ring 20 with reference on the left side with Fig. 2.
Fig. 3 to Fig. 5 shows according to first kind of seal arrangement of the present invention, and in described seal arrangement, rigidity guide ring 20 and elastic sealing ring 24 constitute one by Shooting Technique.Elastic sealing ring 24 is injection-moulded on the guide ring 20 integratedly, thereby forms the black box of a unique needs assembling altogether.This black box only just can be installed in the cylinder hole 18 in an operation.In addition, saved supporting ring in this embodiment fully.
In seal ring 24 as Fig. 3 and Fig. 5, seal ring axially on formed the penetration hole 36 of finedraw shape.During together with guide ring 20, the unshowned drift that is pressed into passes these penetration holes at indentation sealing ring 24.The described drift that is pressed into directly is pressed on the rigidity guide ring 20 subsequently, prevents that thus seal arrangement from blocking in process of press in.
A kind of seal arrangement of the present invention has been shown in Fig. 6 to Fig. 9, and in this seal arrangement, rigid support ring 22 constitutes one with elastic sealing ring 24 by means of Shooting Technique.Described seal ring 24 is injected on the supporting ring 22 integratedly, thereby forms a combined labyrinth and carbon gland assembly altogether.After having placed guide ring 20 in cylinder hole 18 in advance, this black box can only just be installed in the cylinder hole 18 in an operation.
The elastic sealing ring 24 of two kinds of mode of executions of Fig. 6 to Fig. 9 is designed to have step 38, and described step is used for arranging supporting ring 22 thereon, and seal ring 24 has on step 38 next doors at radial outside and opens the seal section 40 that covers on the supporting ring 22.Described seal section 40 presses to supporting ring 22 pump piston 16 and realizes the automatic calibration of supporting ring 22 thus under mounted state.Also prevented from especially thus on seal ring 24, to form bite mark.
As the replacement scheme of the above-mentioned Shooting Technique of having set forth, so-calledly form and also can be to form by means of press-loading process prepackage by the combined labyrinth and carbon gland assembly that supporting ring 22 and seal ring 24 are formed by guide ring 20 and seal ring 24.
Figure 10 illustrates the method that is used to make according to the seal arrangement of the foregoing description of solution of the present invention.Described method comprises by the supporting ring 22 of rigid material such as Fig. 7 and Fig. 9 or as the step 42 of the guide ring 20 of Fig. 4 and by means of Shooting Technique or press-loading process makes seal ring 24 and supporting ring 22 or guide ring 20 form the step 44 of one.
When in step 42, making guide ring 20, on described guide ring, form undercut portions 34.
Subsequently, in step 46, when seal arrangement is pressed onto on the reciprocating pump 10, is pressed into drift and rabbets in the penetration hole 36 on the seal ring 24.
When in step 44, on supporting ring 22, making seal ring 24, on seal ring 24, be formed for arranging the step 38 of supporting ring 22 thereon, make described seal ring 24 have seal section 40 on step 38 next doors at radial outside.
Claims (10)
1. the seal arrangement of the pump piston (16) of reciprocating pump (10), the sealing device has elastic sealing ring (24) and is used for the adjacent rigid support ring (22) of sealing ring (24) or is used for the adjacent rigidity guide ring (20) of pump piston (16), it is characterized in that described seal ring (24) constitutes one with described supporting ring (22) or described guide ring (20) by Shooting Technique.
2. according to the described seal arrangement of claim 1, it is characterized in that, described supporting ring (22) or described guide ring (20) have at least one undercut portions (34), make the material at seal ring described in the Shooting Technique (24) can arrive the back of described undercut portions (34).
3. the seal arrangement of the pump piston (16) of reciprocating pump (10), the sealing device has elastic sealing ring (24) and adjacent rigid support ring (22) or adjacent rigidity guide ring (20), it is characterized in that described seal ring (24) is pre-assembled on described supporting ring (22) or the described guide ring (20) by press-loading process.
4. according to each described seal arrangement in the claim 1 to 3, it is characterized in that, described seal ring (24) has at least one penetration hole (36), makes to be used for described seal arrangement is pressed onto being pressed into drift and can rabbeting described penetration hole (36) on the reciprocating pump (10).
5. particularly according to the seal arrangement of the pump piston (16) of each described reciprocating pump (10) in the claim 1 to 4, the sealing device has elastic sealing ring (24) and is used for the adjacent rigid support ring (22) of sealing ring (24) or is used for the adjacent rigidity guide ring (20) of described pump piston (16)
It is characterized in that, described seal ring (24) has step (38), described step is used for arranging described supporting ring (22) or described guide ring (20) thereon, and described seal ring (24) has seal section (40) at radial outside on described step (38) next door, and described seal section opens and covers on described supporting ring (22) or the described guide ring (20).
6. be used to make the method for the seal arrangement on the pump piston (16) of reciprocating pump (10), this method has the following step:
Be used for the supporting ring (22) of seal ring (24) or be used for the step (42) of guide ring (20) of pump piston (16) and the step (44) that described seal ring (24) and described supporting ring (22) or described guide ring (20) is constituted integratedly by Shooting Technique with rigid material.
7. in accordance with the method for claim 6, it is characterized in that, in the step of making described supporting ring (22) or described guide ring (20), described supporting ring or guide ring formed and have at least one undercut portions (34), make that in Shooting Technique the material of described seal ring (24) can arrive the back of described undercut portions (34).
8. be used to make the method for the seal arrangement on the pump piston (16) of reciprocating pump (10), this method has the following step:
Be used for the supporting ring (22) of seal ring (24) or be used for the step (42) of the guide ring (20) of pump piston (16) with rigid material,
By press-loading process described seal ring (24) is pre-assembled on described supporting ring (22) or the described guide ring (20).
9. particularly according to the method for the seal arrangement of each described pump piston (16) that is used to make reciprocating pump (10) in the claim 6 to 8, described seal arrangement has elastic sealing ring (24) and adjacent rigid support ring (22) or adjacent rigidity guide ring (20), and described method has the following step:
With described seal ring (24) form step (44) with at least one penetration hole (36) and
By being pressed into drift described seal arrangement is pressed onto step (46) on the reciprocating pump (10), the described drift that is pressed into is here rabbeted in described at least one penetration hole (36).
10. particularly according to the method for the seal arrangement of each described pump piston (16) that is used to make reciprocating pump (10) in the claim 6 to 9, described seal arrangement has elastic sealing ring (24) and adjacent rigid support ring (22) or adjacent rigidity guide ring (20), and described method has the following step:
Seal ring (24) formed have the step (38) that is used for arranging described supporting ring (22) or described guide ring (20) thereon, make described seal ring (24) have the step (44) of seal section (40) at radial outside on described step (38) next door, described seal section opens and covers on described supporting ring (22) or the described guide ring (20).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910045634 DE102009045634A1 (en) | 2009-10-13 | 2009-10-13 | Sealing arrangement for pump piston of piston pump, has flexible sealing ring and neighboring rigid protection ring for sealing ring or neighboring rigid guide ring for pump piston |
| DE102009045634.1 | 2009-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102042209A true CN102042209A (en) | 2011-05-04 |
Family
ID=43734497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105041090A Pending CN102042209A (en) | 2009-10-13 | 2010-10-11 | Sealing arrangement for pump piston of piston pump |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102042209A (en) |
| DE (1) | DE102009045634A1 (en) |
| FR (1) | FR2951230A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954220A (en) * | 2011-08-26 | 2013-03-06 | 优泰科(苏州)密封技术有限公司 | Piston sealing part |
| CN104455406A (en) * | 2014-12-06 | 2015-03-25 | 无锡高卓流体设备有限公司 | Piston sealing element |
| CN108071582A (en) * | 2016-11-16 | 2018-05-25 | 江苏瑞凌新能源科技有限公司 | A kind of sealing system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013224832A1 (en) | 2013-12-04 | 2015-06-11 | Robert Bosch Gmbh | Sealing device, piston pump |
| DE102016002432A1 (en) | 2016-03-01 | 2016-11-03 | Daimler Ag | Sealing element, in particular for a motor vehicle |
| FR3049990A1 (en) * | 2016-04-08 | 2017-10-13 | Laurent Eugene Albert | HYDRODYNAMIC MACHINE |
| DE102017213320A1 (en) * | 2017-08-02 | 2019-02-07 | Robert Bosch Gmbh | Sealing ring of a piston pump, in particular for a vehicle brake system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02236062A (en) * | 1989-03-03 | 1990-09-18 | Toyota Autom Loom Works Ltd | Piston |
| US5941162A (en) * | 1997-12-23 | 1999-08-24 | Caterpillar Inc. | Piston |
| CN1271815A (en) * | 1999-09-18 | 2000-11-01 | 彭利 | Fluid transmission type reciprocating hydraulic pump |
| JP2002005038A (en) * | 2000-06-27 | 2002-01-09 | Aisin Seiki Co Ltd | Compressor |
| US6357755B1 (en) * | 1998-02-02 | 2002-03-19 | Maschinenfabrik Sulzer-Burckhardt Ag | Sealing elements for dry running piston compressors |
| CN2647551Y (en) * | 2003-07-17 | 2004-10-13 | 上海克朗宁技术设备有限公司 | Hot runner pneumatic needle valve type single-nozzle cylinder for injection moulding |
| CN1971043A (en) * | 2005-11-23 | 2007-05-30 | 株式会社万都 | Pump for brake system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19902019A1 (en) * | 1999-01-20 | 2000-07-27 | Bosch Gmbh Robert | Piston pump |
| DE10240052A1 (en) * | 2002-08-30 | 2004-03-25 | Robert Bosch Gmbh | Combined seal and guide for pump piston comprises flexible seal and rigid guide connected to form single unit |
| DE102006029391A1 (en) * | 2006-06-27 | 2008-01-03 | Robert Bosch Gmbh | Vehicle brake system piston pump, has piston sealant arranged between cylinder and piston, and formed with elastomer sealing unit and metal spring unit, which pushes section of elastomer sealing unit radially against piston |
| DE102006035055A1 (en) * | 2006-07-28 | 2008-01-31 | Robert Bosch Gmbh | Sealing and guiding unit for piston, has guide bush for guiding piston, and pretensioning unit arranged outside internal sealing region of sealing unit and bearing radially directed force on internal sealing region |
| DE102006036442A1 (en) | 2006-08-04 | 2008-02-07 | Robert Bosch Gmbh | Sealing and guiding device for a piston of a piston pump |
-
2009
- 2009-10-13 DE DE200910045634 patent/DE102009045634A1/en active Pending
-
2010
- 2010-10-11 CN CN2010105041090A patent/CN102042209A/en active Pending
- 2010-10-11 FR FR1058211A patent/FR2951230A1/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02236062A (en) * | 1989-03-03 | 1990-09-18 | Toyota Autom Loom Works Ltd | Piston |
| US5941162A (en) * | 1997-12-23 | 1999-08-24 | Caterpillar Inc. | Piston |
| US6357755B1 (en) * | 1998-02-02 | 2002-03-19 | Maschinenfabrik Sulzer-Burckhardt Ag | Sealing elements for dry running piston compressors |
| CN1271815A (en) * | 1999-09-18 | 2000-11-01 | 彭利 | Fluid transmission type reciprocating hydraulic pump |
| JP2002005038A (en) * | 2000-06-27 | 2002-01-09 | Aisin Seiki Co Ltd | Compressor |
| CN2647551Y (en) * | 2003-07-17 | 2004-10-13 | 上海克朗宁技术设备有限公司 | Hot runner pneumatic needle valve type single-nozzle cylinder for injection moulding |
| CN1971043A (en) * | 2005-11-23 | 2007-05-30 | 株式会社万都 | Pump for brake system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954220A (en) * | 2011-08-26 | 2013-03-06 | 优泰科(苏州)密封技术有限公司 | Piston sealing part |
| CN104455406A (en) * | 2014-12-06 | 2015-03-25 | 无锡高卓流体设备有限公司 | Piston sealing element |
| CN108071582A (en) * | 2016-11-16 | 2018-05-25 | 江苏瑞凌新能源科技有限公司 | A kind of sealing system |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2951230A1 (en) | 2011-04-15 |
| DE102009045634A1 (en) | 2011-04-14 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110504 |