CN1159533C - Air cylinder - Google Patents
Air cylinder Download PDFInfo
- Publication number
- CN1159533C CN1159533C CNB001370308A CN00137030A CN1159533C CN 1159533 C CN1159533 C CN 1159533C CN B001370308 A CNB001370308 A CN B001370308A CN 00137030 A CN00137030 A CN 00137030A CN 1159533 C CN1159533 C CN 1159533C
- Authority
- CN
- China
- Prior art keywords
- main body
- barrier film
- platform
- cylinder assembly
- cylinder barrel
- 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
- 230000004888 barrier function Effects 0.000 claims description 38
- 230000000694 effects Effects 0.000 claims description 13
- 230000009471 action Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 23
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1414—Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
Disclosed is a cylinder apparatus comprising a cylinder tube (16) which includes a first body (12) and a second body (14) having flat disk-shaped configurations connected to one another in an integrated manner; a table (22) having a flat disk-shaped configuration which is movable upwardly and downwardly in a height direction of the cylinder tube (16) in accordance with a flexible bending action of a diaphragm (20) arranged at the inside of the cylinder tube (16); and rod members (26a, 26b) which are supported by bearing members (38a, 38b), for guiding upward/downward movement of the table (22) and preventing the table (22) from rotation.
Description
Technical field
The present invention relates to a kind of cylinder assembly that can move a platform according to the flexural buckling action of the barrier film that plays piston action.
Background technique
So far, cylinder has been used for moving and piston all-in-one-piece piston rod, for example, according to the effect of the pressurized gas of supplying as driving source, the cylinder chamber in the cylinder barrel and mobile piston.
For example, when when Vertical direction is used above-mentioned cylinder in upright mode, cylinder barrel just needs the wall thickness of displacement amount, piston axial dimension and the bar cover and the top cover of affix piston at the size value (size vertically) of short transverse.
Therefore, when attempting to realize planeness easily in the size of short transverse, just to shorten piston in axial size inevitably by the compression cylinder barrel.But also there is some limitation in this technology.
Summary of the invention
General purpose of the present invention provides a kind of cylinder assembly that can obtain higher planeness by compression height direction size.
For this reason, the invention provides a kind of cylinder assembly, comprise: a cylinder barrel, it includes first main body and one second main body that is mesa-shaped structure, whole connection each other; One platform has the mesa-shaped profile, and rod element, and it to guide described platform upward/downward movement, prevents described platform rotation by supporting members support simultaneously; It is characterized in that described cylinder assembly also comprises a barrier film, it is arranged in the inner diaphragm cavity that forms of described cylinder barrel, and is inserted between first main body and second main body; Described platform can be done motion up and down in the short transverse of described cylinder barrel according to the flexural buckling effect of described barrier film.
Description of drawings
Below, can more clearly show above-mentioned and other purposes of the present invention, feature and advantage in conjunction with the accompanying drawings and by following explanation, show the preferred embodiments of the present invention by illustrative example in the accompanying drawings.
Fig. 1 is the perspective view of the cylinder assembly in the expression first embodiment of the invention;
Fig. 2 is the vertical sectional view of expression along II-II line shown in Figure 1;
Fig. 3 is the vertical sectional view of the initial position that moves downward of expression platform;
Fig. 4 is the vertical sectional view that amplify local abridged in the presentation graphs 3;
Fig. 5 is the side view that expression is installed in cylinder assembly shown in Figure 1 partly cut-away on the installation surface of another element;
Fig. 6 is the vertical sectional view of the cylinder assembly in the expression second embodiment of the invention;
Fig. 7 is the vertical sectional view of the state that platform moves upward in the expression cylinder assembly shown in Figure 6;
Fig. 8 is the vertical sectional view of the cylinder assembly in the expression third embodiment of the invention;
Fig. 9 is the vertical sectional view of the cylinder assembly in the expression fourth embodiment of the invention;
Figure 10 is the vertical sectional view of the cylinder assembly in the expression fifth embodiment of the invention;
Figure 11 is the planimetric map of expression cylinder assembly shown in Figure 10; And
Figure 12 represents along the side view of arrow A direction shown in Figure 11.
Fig. 1 and 2 represents the cylinder assembly 10 in the first embodiment of the present invention.
Embodiment
As shown in Figure 1, formed first main body 12 and second main body 14 diameter separately are substantially the same.On the external peripheral surface of first main body 12, be formed with the one first pressure fluid inlet/outlet 28a that is communicated with last diaphragm cavity 18a.On the external peripheral surface of second main body 14, be formed with the one second pressure fluid inlet/outlet 28b that is communicated with lower diaphragm plate chamber 18b.
As shown in Figure 2, piston rod 32 partly is connected with the approximate centre of barrier film 20 by means of clamping element 30.First end of piston rod 32 partly is connected with the approximate centre of platform 22 lower surfaces by means of threaded piece 34.In this scheme, according to the flexural buckling action of barrier film 20, piston rod 32 integrally moves in the vertical direction with barrier film 20.Thereby, platform 22 is moved up and down.One Sealing 36 is installed in the annular groove of first main body 12, and the sealing part is round the external peripheral surface of piston rod 32, to keep the tightness of diaphragm cavity 18.
Second main body 14 is provided with cylindrical support 38a, 38b, and it has the hole that is used to insert a pair of rod element 26a, 26b.Rod element 26a, 26b are being supported reposefully by supporting member 38a, 38b and are moving linearly.
As shown in Figure 1, be formed with each other four workpiece mounting hole 40a along the circumferential direction separating on the platform 22 to 40d with the interval angles of about 90 degree.One workpiece of not expressing or analog are installed to 40d by means of workpiece mounting hole 40a.Platform 22 has mounting screw patchhole 42a, the 42b of a pair of perforation, these two holes predetermined span of being arranged to be separated from each other.All be formed with the mounting hole 44a with above-mentioned mounting screw patchhole 42a, a pair of perforation that 42b is corresponding in first main body 12 and second main body 14 each, the 44b (see figure 5).
Therefore, as shown in Figure 5, by mounting screw 43 being inserted in mounting screw patchhole 42a, the 42b of a pair of perforation that forms on the platform 22 respectively, make mounting screw 43 pass mounting hole 44a again, 44b, and screw is screwed in the tapped hole 47 that forms on the installation surface 45 of another element, thereby cylinder assembly 10 can be installed in upper surface side (from that side of platform 22).
As shown in Figure 4, respectively form a plurality of annular grooves 46 in the peripheral part clamping of barrier film 20 and top and the office, bottom that is inserted between first main body 12 and second main body 14 with different-diameter.The surface portion of barrier film 20 is engaged in a plurality of annular grooves 46.Like this, just can be reliably and closely clamp barrier film 20, can highly precisely make diaphragm cavity 18 keep tightness simultaneously.
The cylinder assembly 10 of first embodiment of the invention constitutes substantially as described above.Below, its operating process, function and effect will be described.
The first pressure fluid inlet/outlet 28a is connected with pressure fluid supply source (not shown) by the pipeline of not expressing with the second pressure fluid inlet/outlet 28b.For following explanation, suppose initial position be platform 22 move downward and with first main body, 12 state of contact, as shown in Figure 3.
At initial position, make the pressure fluid supply source of not expressing from the second pressure fluid inlet/outlet 28b supply pressure fluid.In this course, suppose that the first pressure fluid inlet/outlet 28a is in the state that is communicated with atmosphere according to the switching effect of the position control valve of not expressing.Be introduced in the 18b of lower diaphragm plate chamber from the pressure fluid of second pressure fluid inlet/outlet 28b supply.According to the effect of pressure fluid, upwards promote barrier film 20.
By the effect that upwards pressure, barrier film 20 flexural bucklings.Barrier film 20 and piston rod 32 integral body move up.Therefore, platform 22 also moves upward.In this case, the clamping element 30 that clips the approximate centre part of barrier film 20 is leaning first main body 12.Therefore, formed the state of the given displacement end posi-tion of Fig. 2.
When platform 22 when action moves upward according to the flexural buckling of barrier film 20, a pair of rod element 26a, 26b by supporting member 38a, 38b supporting to platform 22 carry out smoothly, guiding point-blank, prevent that thus platform from along the circumferential direction rotating.
When from the pressure fluid of pressure fluid supply source supply according to the transformation of the position control valve of not expressing and when the second pressure fluid inlet/outlet 28b is transformed into the first pressure fluid inlet/outlet 28a, according to the effect of introducing the pressure fluid of going up diaphragm cavity 18a, platform 22 moves downward, and is returned to initial position.In this case, suppose that the second pressure fluid inlet/outlet 28b is communicated with atmosphere.
In an embodiment of the present invention, flat and roughly disk-shaped first main body 12 and second main body 14 each other integral body connect and compose cylinder barrel 16.Barrier film 20 is arranged in the diaphragm cavity 18 that forms in the cylinder barrel 16.Flat and roughly disk-shaped platform 22 moves and moves up and down along the short transverse of cylinder barrel 16 according to the flexural buckling of barrier film 20.Therefore, can obtain such cylinder assembly 10, compare with conventional art, it has compressed size and has had higher planeness on short transverse.
The cylinder barrel 16 of dish type and platform 22 can adopt the method for extruding or drawing to process at an easy rate.Like this, just can reduce cost of production.
When being formed with the roughly disk-shaped depression (not shown) corresponding with the shape of cylinder barrel 16 so that when inserting cylinder barrel 16 in these roughly disk-shaped depressions, by with the external peripheral surface of cylinder barrel 16 as sleeve pipe, can realize the location at an easy rate.
According to the pressure difference between last diaphragm cavity 18a and the lower diaphragm plate chamber 18b, platform 22 can move up and down by the flexural buckling of barrier film 20.
By supporting member 38a, 38b the supporting a pair of rod element 26a, 26b play simultaneously smoothly and point-blank guide platform 22 leading role and prevent the anti-rotation effect that platform along the circumferential direction rotates.Therefore, can reduce the quantity of parts and reducing production costs.
Below, Fig. 6 and 7 expresses the cylinder assembly 50 of second embodiment of the invention.Among other embodiment that will illustrate below, the structural element identical with cylinder assembly 10 among above-mentioned first embodiment represented with identical reference character, do not repeat them here.
The difference of the cylinder assembly 50 among second embodiment is: set a pair of supporting member 52a, 52b basically with cylinder barrel 16 measure-alike in short transverse, the size of rod element 54a, 54b is lengthening slightly vertically, thereby makes respectively by first end of rod element 54a, the 54b of a pair of supporting member 52a, 52b supporting outstanding from the bottom surface of cylinder barrel 16.
As mentioned above, in second embodiment's cylinder assembly 50, this is sized to equate basically that with the size of cylinder barrel 16 in short transverse simultaneously, rod element 54a, 54b extend slightly in the size of axial direction at axial direction to supporting member 52a, 52b.Therefore, platform 22 can be by by this rod element 54a, 54b that supporting member 52a, 52b slidably support stably being supported.And then, can improve the supporting validity of rod element 54a, 54b.
Below, Fig. 8 is represented is cylinder assembly 60 in the third embodiment of the invention.
Be provided with a spring part 62 in the cylinder assembly 60 among the 3rd embodiment, its first end is fixed on the clamping element 30 that is connected with piston rod 32, and second end is fixed on the inwall of first main body 12.Second main body 14 is provided with a pressure fluid inlet/outlet 28 that is used for downward diaphragm cavity 18b supply pressure fluid.First main body 12 is provided with the vent 64 that is used to make diaphragm cavity 18a and atmosphere connection.
In this scheme, cylinder assembly 60 among the 3rd embodiment constitutes a single-acting cylinder, wherein, barrier film 20, clamping element 30 and platform 22 overcome the spring force of spring part 62 according to the effect that is fed to the pressure fluid of lower diaphragm plate chamber 18b and integrally move upward, utilize the effect of the spring force of spring part 62, make the platform 22 that has moved upward be returned to initial position again.
As mentioned above, the cylinder assembly 60 among the 3rd embodiment has adopted the single-acting cylinder setting that pressure fluid only is fed to lower diaphragm plate chamber 18b.Therefore, can simplify the control loop (Pneumatic pressure loop) that is used for to cylinder assembly 60 supply pressure fluids.
Below, Fig. 9 is the cylinder assembly 70 among expression the 4th embodiment.
Have an intermediary element 72 in the 4th embodiment's the cylinder assembly 70, it is inserted between first main body 12 and second main body 14, and be provided be inserted in the first barrier film 20a between first main body 12 and the intermediary element 72 and be inserted in intermediary element 72 and second main body 14 between the second barrier film 20b.The first and second barrier film 20a, 20b are separated from each other a predetermined span and constitute a double layer construction.Be formed with a vent 76 on the intermediary element 72, to send into/to discharge the air in the chamber 74 that centers on by the first and second barrier film 20a, 20b.
As mentioned above, the cylinder assembly 70 among the 4th embodiment has the double layer construction that comprises the first barrier film 20a and the second barrier film 20b.Therefore, disperse, can prolong its working life by the load that will be applied on the first and second barrier film 20a, the 20b.
Below, Figure 10 to 12 is the cylinder assemblys 80 in the expression fifth embodiment of the present invention.
As shown in figure 10, cylinder assembly 80 among the 5th embodiment is made of the two bars that have the first piston bar 88 and second piston rod 92, wherein, the first piston bar is arranged to move up and down along the hole of running through first main body 82, and this piston rod is connected with platform 86 by means of threaded piece 84; Second piston rod and 88 coaxial connections of first piston bar, and it reaches the outside from the hole of running through second main body 90.
One has the V-arrangement transverse section, is installed in the annular groove of first main body 82 around the Sealing 94a of first piston bar 88.One has the V-arrangement transverse section, is installed in the annular groove of second main body 90 around the Sealing 94b of second piston rod 92.
Clamping element 98a, the 98b that is used for clamping barrier film 96 is arranged on the attachment portion between the first piston bar 88 and second piston rod 92.Pass the hole 100 that the first piston bar 88 and second piston rod 92 are formed with axial perforation.In this scheme, owing to be formed with through hole 100, just can be with hole 100 as a pipe passage that will be placed on another pneumatic compression device (not shown) on the platform 86.
As shown in figure 11, a pair of relative circular arc shaped portion is downcut from platform 86, this platform is connected with a pair of workpiece locating stud 102a, 102b, and this is to the workpiece locating stud predetermined span that is separated from each other on the straight line at the center by the first and second disk-shaped main bodys 82,90.
Corresponding with double-rod structure, as shown in figure 12, first main body 82 and second main body 90 are formed with a pair of first mounting hole 44a, 44b and the second mounting hole 104a, 104b respectively, and wherein first mounting hole is used for mounting screw 43 (see figure 5)s are inserted from that side of first main body 82; Second mounting hole is used for mounting screw 43 is inserted from that side of second main body 90.
As mentioned above, the cylinder assembly among the 5th embodiment 80 can carry out following operation because it has double-rod structure.Promptly, one pneumatic compression device of not expressing is bearing on the first piston bar 88 on first side, the displacement of second piston rod 92 on second side simultaneously can be come out by the sensor of not expressing, thereby transmits a testing signal to the peripheral control unit (not shown).
Claims (7)
1. cylinder assembly comprises:
One cylinder barrel (16), it includes first main body (12,82) and one second main body (14,90) that is mesa-shaped structure, whole connection each other;
One platform (22,86) has the mesa-shaped profile, and
Rod element (26a, 26b, 54a, 54b), (52a 52b) supports for 38a, 38b, to guide described platform (22,86) upward/downward movement, prevents described platform (22,86) rotation simultaneously by supporting member for it; It is characterized in that described cylinder assembly also comprises a barrier film (20,20a, 20b, 96), it is arranged in the inner diaphragm cavity (18) that forms of described cylinder barrel (16), and is inserted between first main body (12,82) and second main body (14,90);
Described platform can be done motion up and down in the short transverse of described cylinder barrel (16) according to the flexural buckling effect of described barrier film (20,20a, 20b, 96).
2. cylinder assembly according to claim 1, wherein, each is all disk-shaped in described first main body (12,82), described second main body (14,90) and the described platform (22).
3. cylinder assembly according to claim 1, wherein, when described platform (22) placed with the approaching initial position of described cylinder barrel (16), (26a, 26b) length was concordant with the side surface of described cylinder barrel (16) for the rod element that sets.
4. cylinder assembly according to claim 1, wherein, when described platform (22) placed with the approaching initial position of described cylinder barrel (16), (54a, end 54b) stretched out a predetermined length from the side surface of described cylinder barrel (16) to the outside to formed rod element.
5. cylinder assembly according to claim 1, wherein, the spring part (62) that is used to make the piston rod (32) that is connected with described platform (22) to be returned to initial position is arranged in the described diaphragm cavity (18).
6. cylinder assembly according to claim 1, wherein, described barrier film comprises first barrier film (20a) and second barrier film (20b), and first barrier film is inserted between described first main body (12) and the intermediary element (72); Second barrier film (20b) separates a predetermined span with described first barrier film (20a), and is inserted between described intermediary element (72) and described second main body (14).
7. cylinder assembly according to claim 1, wherein also comprise first piston bar (88) and second piston rod (92), the first piston bar is set to and can moves up and down along a hole of passing described first main body (82), and this first piston bar is connected with described platform (86); Second piston rod (92) and coaxial connection of described first piston bar (88), and this second piston rod reaches the outside from a hole of passing described second main body (90).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33536099 | 1999-11-26 | ||
| JP335360/1999 | 1999-11-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1298065A CN1298065A (en) | 2001-06-06 |
| CN1159533C true CN1159533C (en) | 2004-07-28 |
Family
ID=18287668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001370308A Expired - Lifetime CN1159533C (en) | 1999-11-26 | 2000-11-24 | Air cylinder |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100399387B1 (en) |
| CN (1) | CN1159533C (en) |
| DE (1) | DE10058145B4 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344942C (en) * | 2006-04-03 | 2007-10-24 | 浙江大学 | Oil container for measuring oil volume changing |
| CH708932B1 (en) * | 2013-12-09 | 2017-04-13 | Besi Switzerland Ag | Downholder for holding down the substrate locations of a substrate for the purpose of mounting semiconductor components. |
| DE102014014655A1 (en) * | 2014-10-08 | 2016-04-14 | DYNA-MESS Prüfsysteme GmbH | Membrane cylinder unit with a double diaphragm |
| CN107559262A (en) * | 2017-08-25 | 2018-01-09 | 大连理工大学 | A kind of small stroke servo-cylinder of low friction |
| CN110630585A (en) * | 2019-10-11 | 2019-12-31 | 常熟市徐润机电有限公司 | Pneumatic device |
| DE202022100511U1 (en) | 2021-09-06 | 2022-04-07 | Fte Automotive Gmbh | Diaphragm cylinder and vehicle transmission with a diaphragm cylinder |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB600000A (en) * | 1945-09-27 | 1948-03-25 | Alfred Bullows & Sons Ltd | Improvements relating to diaphragms for fluid operated mechanisms |
| US4543790A (en) * | 1981-07-15 | 1985-10-01 | Bendiberica, S.A. | Master cylinder and brake booster assembly |
| DE4108312C2 (en) * | 1991-03-14 | 1993-12-23 | Ivan Ivanov | Actuator |
-
2000
- 2000-11-22 KR KR10-2000-0069671A patent/KR100399387B1/en active IP Right Grant
- 2000-11-22 DE DE10058145A patent/DE10058145B4/en not_active Expired - Lifetime
- 2000-11-24 CN CNB001370308A patent/CN1159533C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE10058145B4 (en) | 2006-12-28 |
| KR20010060378A (en) | 2001-07-06 |
| KR100399387B1 (en) | 2003-09-26 |
| CN1298065A (en) | 2001-06-06 |
| DE10058145A1 (en) | 2001-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1195947C (en) | Linear actuator | |
| CN1195605C (en) | Work-clamping means | |
| CN1892052A (en) | Locking mechanism used together with fluid pressure operation device | |
| CN1162630C (en) | Sluice valve | |
| CN1216716C (en) | Clamping device | |
| CN1150380C (en) | Linear moving device | |
| CN1159533C (en) | Air cylinder | |
| CN1264650C (en) | Pneumatic precision pliers | |
| CN1237286C (en) | Linear actuator | |
| CN1166868C (en) | Rodless cylinder | |
| CN1842663A (en) | Clamping and/or braking device | |
| CN1967257A (en) | Nozzle device for aliquoting and dispensing specimen incorporated reference | |
| CN1741874A (en) | Spring lock-type clamp device | |
| CN1393693A (en) | Low-pulse high-precision efficient liquid-phase chromatographic pump with dual plungers | |
| CN1072330C (en) | Cylinder apparatus | |
| CN1109204C (en) | Method and device for assembling hydraulic shock absorber | |
| JP2009062870A (en) | Air pump | |
| CN1227460C (en) | Cylinder with guide implement | |
| CN1116212C (en) | Cylinder device | |
| CN114986059A (en) | Bottle welding process is with butt joint mounting fixture | |
| CN1354068A (en) | Holding device | |
| CN1283482C (en) | Vehicle power unit mounting structure | |
| CN1343843A (en) | Linear actuator | |
| CN117450255A (en) | Testing device and testing method for double-sided horizontal pressurized sealing | |
| CN200943613Y (en) | Reversing valve core guiding subassembly and plunger type high pressure gas-free spraying machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20040728 |
|
| CX01 | Expiry of patent term |