CN202187910U - Novel four-wire meshing internal pressure seal pump - Google Patents
Novel four-wire meshing internal pressure seal pump Download PDFInfo
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- CN202187910U CN202187910U CN2011201954803U CN201120195480U CN202187910U CN 202187910 U CN202187910 U CN 202187910U CN 2011201954803 U CN2011201954803 U CN 2011201954803U CN 201120195480 U CN201120195480 U CN 201120195480U CN 202187910 U CN202187910 U CN 202187910U
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- rotor shaft
- compensating disc
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Abstract
A novel four-wire meshing internal pressure seal pump comprises a pump body (4), a rotor shaft (1) mounted in a central through hole (41) of the pump body (4), and auxiliary rotors (2) mounted on eccentric half holes (42) of the pump body (4), wherein, the working inner end surfaces of the two rotors are attached to the bottom plane surfaces (40) of the eccentric half holes (42), and the working outer end surfaces are attached to the positive plane surfaces of compensation plates (6); a positioning pin (7) fixed on an eccentric end cover (5) is used to limit the compensation plates (6) for axial sliding only; the space between the back sides of the compensation plates (6) and the eccentric end cover (5) is communicated with an internal pressure reflow passage (9); and the rotor shaft (1) and the auxiliary rotors (2) are mutually meshed in the revolution so as to form four work spaces, namely, A, B, C, and D. According to the utility model, the structure is provided with both end surface abrasion seal compensation and radial abrasion seal compensation so as to allow a high-pressure cavity and a low-voltage cavity to be in good dynamic isolation seal state for a long time.
Description
Technical field
The utility model belongs to mechanical engineering field, and International Classification of Patents is the F04D non-varactor pump, relate to a kind of with mechanical energy convert into fluid pressure can the transformation of energy displacement pump, be meant a kind of four lines engagement inner pressuring sealing new pump especially.
Background technique
Known displacement pump main structure form has: plunger pump, screw pump, Roots pump and sliding vane pump.Have the high advantage of efficient as displacement pump, but all exist its efficient of long-time running wearing and tearing back obviously to reduce, cause the main cause of above-mentioned defective to be that the end face dynamic isolation between hyperbaric chamber and the low pressure chamber fails to play effective sealing.The undersized easy heat expansion of end face fit tolerance is stuck firmly; The end face fit tolerance is oversize then fails to play effective sealing; And long-time running wearing and tearing back sealing effect is poorer, and the production line of having to stop is changed pumping unit, causes very big direct waste and indirect loss.
Plunger pump is fit to high pressure but pulse is big, does not possess self-compensating after the wearing and tearing; Screw pump be fit to high viscosity but on unit volume manufacture cost high, do not possess self-compensating after the wearing and tearing yet; Roots pump is fit to liquids and gases but radially there is the gap in it, and radially with behind the end wear does not possess self-compensating; Sliding vane pump can be accomplished self-compensating after the gauge wear, but does not still possess self-compensating behind the end wear, and the slide plate stuck phenomenon happens occasionally.So far fail to see a kind of effective displacement pump both at home and abroad, can possess the structure function of end wear sealing compensation and gauge wear sealing compensation simultaneously.(its English full name of " SCI " U.S. " science citation index " is Science Citation Index to the U.S.'s three large-engineerings science and technology magazine, is called for short SCI; " EI " U.S. its English full name of EI is The Engineering Index, is called for short EI; Its English full name of " ISTP " U.S. " scientific and technical conference record index " is Index to Scientific & Technical Proceedings, is called for short ISTP.) take in global engineering science and technology paper, also not seen has a kind of displacement pump that can possess end wear sealing compensation and gauge wear sealing compensation simultaneously.
Summary of the invention
The purpose of the utility model provides a kind of four lines engagement inner pressuring sealing new pump; The technology that possesses end wear sealing compensation and gauge wear sealing compensation simultaneously; To realize being in good dynamic isolation sealing state for a long time between hyperbaric chamber and the low pressure chamber; Remedy the deficiency of existing technology, fill up the technological gap that displacement pump possesses end wear sealing compensation and gauge wear sealing compensation simultaneously.
To achieve these goals; The utility model provides following technological scheme: a kind of four lines engagement inner pressuring sealing new pump; Comprise the pump housing 4 and be installed on rotor shaft 1 and off-centre half hole 42 that is installed in the pump housing 4 on the central through bore 41 of the pump housing 4 from rotor 2; The work inner end of two rotors is pasting the bottom plane 40 in eccentric half hole 42; The horizontal frontal plane of compensating disc 6 is also being pasted in the work exterior edge face of two rotors, and has the locating stud that is fixed on the eccentric end cap 57 restriction compensating discs 6 to do to endwisely slip the screw 8 airtight exterior edge faces, working area that are fixed on eccentric half hole 42 that eccentric end cap 5 usefulness are at least three; Space between the back side of described compensating disc 6 and the eccentric end cap 5 with in push back runner 9 and communicate, in push back runner 9 the other end lead to outlet 49; And rotor shaft 1 and rotation, be meshing with each other from rotor 2, four axially extended sealing strips of synchronized generation constitute A, B, C and four working spaces of D.In push back the pressure that runner 9 introduces and make that the back side of compensating disc 6 is stressed stressed greater than the front, the work exterior edge face of two rotors can be close in its front, forces the work inner end of two rotors also to be close to bottom plane 40 then, possesses the end wear sealing compensation; And rotor shaft 1 and from four axially extended sealing strips of rotor 2 synchronized generation; Constitute A, B, C and four working spaces of D; Can guarantee that still four axially extended sealing strips form synchronously after the long-term use of the experience uniform wear, four axially extended sealing strips of synchronized generation have guaranteed that radially sliding of four working spaces is in effective sealing all the time.This structure has accomplished to possess simultaneously end wear sealing compensation and gauge wear sealing compensation, realizes being in good dynamic isolation sealing state for a long time between hyperbaric chamber and the low pressure chamber.
Central through bore on the said pump housing 4 is with " O " type ring recess, the central axis O of central through bore 41 for 41 li
2Central axis O with off-centre half hole 42
1Between have throw of eccentric t; Crescent shape suction inlet 47 UNICOMs on the bottom plane 40 import 46; Another crescent shape row mouthful 48 UNICOMs on the bottom plane 40 outlet 49, outlet 49 have a bypass in push back runner 9 and lead to the back side of compensating disc 6 and the space between the eccentric end cap 5.
Said rotor shaft 1 comprises four five equilibrium cambered surface active sections 13 and does not have keyway shaft part 11 and shaft with keyway section 12; The work inner end of four five equilibrium cambered surface active sections 13 is pasting the work exterior edge face of bottom plane 40, four five equilibrium cambered surfaces active section 13 and is being close to by the horizontal frontal plane of compensating disc 6.
Saidly comprise complete section of five five equilibrium cambered surfaces, the size equal uniform of the width of full section both ends of the surface and the both ends of the surface width of four five equilibrium cambered surface active sections 13 from rotor 2.
The central axis O of band " O " the type ring recess through hole 61 on the described compensating disc 6
2Central axis O with band " O " type ring recess cylindrical 62
1Between have throw of eccentric t, the eccentric positioning hole of compensating disc 6 67 is slidingly matched with locating stud 7.Push back the outlet pressure that runner 9 is introduced by means of interior; The front of causing compensating disc 6 is the half the outlets of leading to, and second half leads to import, and to be gross area lead to outlet at the back side; Make that the back side of compensating disc 6 is stressed stressed greater than the front; The horizontal frontal plane of compensating disc 6 can be close to the work exterior edge face of two rotors all the time, forces the work inner end of two rotors also to be close to bottom plane 40 then, guarantees that the end face slip of four working spaces is in effective sealing all the time.
The central axis O of described rotor shaft 1
2With central axis O from rotor 2
1Between have throw of eccentric t; Four five equilibrium cambered surface active sections 13 of rotor shaft 1 and between five five equilibrium cambered surfaces of rotor 2, rotation, being meshing with each other; Four point of contact of synchronized generation; Cross point of contact and form four axially extended sealing strips, the horizontal frontal plane in conjunction with bottom plane 40 and compensating disc 6 constitutes A, B, C and four working spaces of D; Can guarantee that still four axially extended sealing strips form synchronously after the long-term use of the experience uniform wear, four axially extended sealing strips of synchronized generation guarantee that radially sliding of four working spaces is in effective sealing all the time.
Possess in the time of end wear sealing compensation and gauge wear sealing compensation, realize being in good dynamic isolation sealing state for a long time between hyperbaric chamber and the low pressure chamber.
Installation steps and working principle:
The shaft with keyway section 12 of rotor shaft 1 is 40 1 sides from the bottom plane, pass central through bore 41 and are slidingly matched with it, and the work inner end of four five equilibrium cambered surface active sections 13 is pasting bottom plane 40.Be placed in eccentric half hole 42 from rotor 2 and be slidingly matched, also pasting bottom plane 40 from the work inner end of rotor 2.The central axis O of rotor shaft 1
2With central axis O from rotor 2
1Between have throw of eccentric t; Four five equilibrium cambered surface active sections 13 of rotor shaft 1 and between five five equilibrium cambered surfaces of rotor 2, rotation, being meshing with each other, four point of contact of synchronized generation are crossed point of contact and are formed four axially extended sealing strips; Horizontal frontal plane in conjunction with bottom plane 40 and compensating disc 6; Constitute A, B, C and four working spaces of D, can guarantee that still four axially extended sealing strips form synchronously after the long-term use of the experience uniform wear, guarantee the radially effectively sealing all the time of four working spaces.
The central axis O of the band on the compensating disc 6 " O " type ring recess through hole 61
2Central axis O with band " O " type ring recess cylindrical 62
1Between have throw of eccentric t, the eccentric positioning hole of compensating disc 6 67 is slidingly matched with locating stud 7.The horizontal frontal plane of compensating disc 6 inwardly, band " O " type ring recess through hole 61 is inserted in from no keyway shaft part 11 1 ends of rotor shaft 1 and is slidingly matched, band " O " type ring recess cylindrical 62 is slidingly matched with eccentric half hole 42.
Band " O " type ring recess through hole 51 on the eccentric end cap 5 is inserted in from no keyway shaft part 11 1 ends of rotor shaft 1 and is slidingly matched, and locating stud 7 is fastened on the eccentric end cap 5 inboard faces.With eccentric end cap 5 shimmings 54 backs with at least three screw 8 on the exterior edge face, working area in airtight off-centre half hole 42 that is fixed on the pump housing 4 of the outer circular edge of eccentric end cap 5.
The back side of compensating disc 6 has positioning hole 67 and locating stud 7 to be slidingly matched, and locating stud 7 is fixedly connected with eccentric end cap 5, thereby compensating disc 6 can only be made axial slip with respect to eccentric end cap 5." O " type circle in all " O " type ring recess plays the motive sealing effect at position of living in.
During work; External force drives rotor shafts 1 rotation through shaft with keyway section 12, stirs then from rotor 2 rotations, has throw of eccentric t from both rotating centers of rotor 2 and rotor shaft 1; Four five equilibrium cambered surface active sections 13 of rotor shaft 1 and between five five equilibrium cambered surfaces of rotor 2, rotation, being meshing with each other; Four axially extended sealing strips of synchronized generation, the horizontal frontal plane in conjunction with bottom plane 40 and compensating disc 6 constitutes A, B, C and four working spaces of D.During rotation, A, B, C and four working spaces of D along with rotation will become a big side gradually and be crescent shape suction inlet 47, lead to import 46; One side that will diminish gradually along with rotation of A, B, C and four working spaces of D is a crescent shape row mouth 48, leads to outlet 49.Rotor shaft 1 continuously rotation order about A, B, C and four working spaces of D go round and begin again accomplish inhale, row's work.
The beneficial effect of the utility model is: rotor shaft 1 and between rotor 2, rotation, being meshing with each other; Four axially extended sealing strips of synchronized generation; Make that by means of the interior runner 9 that pushes back the back side of compensating disc 6 is stressed stressed greater than the front; Anomaly face one side of compensating disc 6 is close to the work exterior edge face of two rotors all the time; Then force the work inner end of two rotors also to be close to bottom plane 40, constitute A, B, C and four working spaces of D and possessed end wear sealing compensation and gauge wear sealing compensation simultaneously, realize being in good dynamic isolation sealing state for a long time between hyperbaric chamber and the low pressure chamber.
Description of drawings
Fig. 1 is the sectional drawing of the utility model integral body through axis;
Fig. 2 is the sectional drawing in W-W cross section among Fig. 1;
Fig. 3 is the relative position relation of inner rotor shaft 1 with respect to four working spaces of synchronized generation that are in operation from rotor 2;
Fig. 4 is with respect to Fig. 3, rotor shaft 1 be rotated counterclockwise 50 the degree, from rotor 2 be rotated counterclockwise 40 the degree after relative position relation;
Fig. 5 is with respect to Fig. 3, rotor shaft 1 be rotated counterclockwise 100 the degree, from rotor 2 be rotated counterclockwise 80 the degree after relative position relation;
Fig. 6 is with respect to Fig. 3, rotor shaft 1 be rotated counterclockwise 150 the degree, from rotor 2 be rotated counterclockwise 120 the degree after relative position relation;
Fig. 7 is with respect to Fig. 3, rotor shaft 1 be rotated counterclockwise 200 the degree, from rotor 2 be rotated counterclockwise 160 the degree after relative position relation;
Fig. 8 is with respect to Fig. 3, rotor shaft 1 be rotated counterclockwise 250 the degree, from rotor 2 be rotated counterclockwise 200 the degree after relative position relation;
Fig. 9 is with respect to Fig. 3, rotor shaft 1 be rotated counterclockwise 300 the degree, from rotor 2 be rotated counterclockwise 240 the degree after relative position relation;
Figure 10 is with respect to Fig. 3, rotor shaft 1 be rotated counterclockwise 350 the degree, from rotor 2 be rotated counterclockwise 280 the degree after relative position relation.
Figure 11 is the exterior perspective view of rotor shaft 1.
Figure 12 is a rotor shaft 1 and from the camberline construction drawing of rotor 2.
Embodiment
In conjunction with accompanying drawing and embodiment, further structure and the working principle to the utility model elaborates.
Figure 12 illustrates rotor shaft 1 by means of CAD and from the camberline working process of rotor 2:
Setting-out X of elder generation and vertical with it line Y1 and line Y2, intersection point is respectively O
1, O
2, O
1With O
2Be throw of eccentric t apart.Here getting throw of eccentric t is 6mm;
With O
1Be the center of circle, R1 is that radius is made basic circle R1.Here getting the R1 radius is 60mm;
An intersection point with basic circle R1 and line X is the center of circle, and R2 is that radius is made arc section R2, again with O
1Be the center of circle, with arc section R2 around O
1Five five equilibrium annular arrays.Here getting the R2 radius is 33mm;
The distance that is extended to R3 with the intersection point of arc section R2 and line X is the center of circle, is that the intersection point that radius is crossed arc section R2 and line X is made arc section R3 with R3, again with O
2Be the center of circle, with arc section R3 around O
2Quartering annular array.Here getting the R3 radius is 50mm;
Choose two arc section R3 and an arc section R2 respectively, the tangent arc section R4 that does of four lines gets the R4 radius here and is approximately 4.8mm;
With R5 is that radius is made two adjacent arc section R2 of arc section R5 connection respectively, and the R5 radius is 40mm here.
Article four, arc section R4 alternately with four point of contact of five arc section R2 synchronized generation, cross point of contact and form four axially extended sealing strips, constitute A, B, C and four working spaces of D.Even after using uniform wear for a long time, four point of contact of synchronized generation form four axially extended sealing strips can guarantee that still four axially extended sealing strips form synchronously, and that guarantees four working spaces radially is in effective sealing all the time.
The both ends of the surface width of four five equilibrium cambered surface active sections 13 of rotor shaft 1 and size equal uniform from the both ends of the surface width of rotor 2; Here getting the both ends of the surface width all is 50mm; The both ends of the surface width of four five equilibrium cambered surface active sections 13 of rotor shaft 1 with from rotor 2 the size equal uniform of both ends of the surface width; The work inner end of two rotors is pasting bottom plane 40 respectively, and the horizontal frontal plane of compensating disc 6 is pasting the work exterior edge face of two rotors respectively.Make that by means of the interior runner 9 that pushes back the back side of compensating disc 6 is stressed stressed greater than the front; The horizontal frontal plane of compensating disc 6 is close to the work exterior edge face of two rotors all the time; Then force the work inner end of two rotors also to be close to bottom plane 40, guarantee that the end face slip of four working spaces is in effective sealing all the time." O " type circle in all " O " type ring recess plays the motive sealing effect at position of living in.
A kind of four lines engagement inner pressuring sealing new pump; Comprise the pump housing 4 and be installed in rotor shaft 1 and the off-centre that is installed in the pump housing 4 half hole 42 on the central through bore 41 of the pump housing 4 from rotor 2; There is eccentric end cap 5 exterior edge face, working area in eccentric half hole 42; There is the horizontal frontal plane of compensating disc 6 pasting work exterior edge face between described work exterior edge face and the eccentric end cap 5 from rotor 2, locating stud 7 slip fixed compensation dishes 6 circumferential positions with respect to eccentric end cap 5 from rotor 2.
Central through bore on the pump housing 4 is with " O " type ring recess, the central axis O of central through bore 41 for 41 li
2Central axis O with off-centre half hole 42
1Between have throw of eccentric t, crescent shape suction inlet 47 UNICOMs on the bottom plane 40 import 46, another crescent shape row mouthful 48 UNICOMs outlet 49, outlet 49 have a bypass in push back runner 9 and lead to the back side of compensating disc 6 and the space between the eccentric end cap 5.
Earlier with the shaft with keyway section 12 of rotor shaft 1 from the bottom plane 40 1 sides, pass central through bore 41 and be slidingly matched with it, the work inner end of four five equilibrium cambered surface active sections 13 is pasting bottom plane 40.To be placed in eccentric half hole 42 from rotor 2 and be slidingly matched, also paste bottom plane 40 from the work inner end of rotor 2.Make the central axis O of rotor shaft 1
2With central axis O from rotor 2
1Between have throw of eccentric t.From no keyway shaft part 11 1 ends, load onto compensating disc 6 successively again; Locating stud 7 is fixed on the back side of eccentric end cap 5; At last with eccentric end cap 5 shimmings 54, with the outer circular edge of four screws 8, on the exterior edge face, working area in airtight off-centre half hole 42 that is fixed on the pump housing 4 along eccentric end cap 5.
During work; External force drives rotor shaft 1 rotation through shaft with keyway section 12; Then stir from rotor 2 rotation, have throw of eccentric t, four five equilibrium cambered surface active sections 13 of rotor shaft 1 and from four axially extended sealing strips of synchronized generation between five five equilibrium cambered surfaces of rotor 2 from both rotating centers of rotor 2 and rotor shaft 1; Horizontal frontal plane in conjunction with bottom plane 40 and compensating disc 6 constitutes A, B, C and four working spaces of D.During rotation, A, B, C and four working spaces of D along with rotation will become a big side gradually and be crescent shape suction inlet 47, lead to import 46; One side that will diminish gradually along with rotation of A, B, C and four working spaces of D is a crescent shape row mouth 48, leads to outlet 49.Push back runner 9 on outlet 49 bypass and pressure is sent to the back side of compensating disc 6 and the space between the eccentric end cap 5; Make that the back side of compensating disc 6 is stressed stressed greater than the front; The horizontal frontal plane of compensating disc 6 can be close to the exterior edge face of two rotors all the time; Then force the inner end of two rotors also to be close to bottom plane 40, guarantee that the end face slip of four working spaces is in effective sealing all the time.Rotor shaft 1 continuously rotation order about A, B, C and four working spaces of D go round and begin again accomplish inhale, row's work.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be regarded as the protection domain of the utility model.
Claims (6)
1. a line meshes the inner pressuring sealing new pump; Comprise the pump housing (4) and be installed in the rotor shaft (1) on the central through bore (41) of the pump housing (4) and be installed in off-centre half hole (42) of the pump housing (4) from rotor (2); The work inner end of two rotors is pasting the bottom plane (40) in eccentric half hole (42); The horizontal frontal plane of compensating disc (6) is also being pasted in the work exterior edge face of two rotors; And have locating stud (7) the restriction compensating disc (6) that is fixed on the eccentric end cap (5) to do to endwisely slip; Eccentric end cap (5) comes the airtight exterior edge face, working area that is fixed on eccentric half hole (42) with at least three screw (8), it is characterized in that: the space between the back side of described compensating disc (6) and the eccentric end cap (5) with in push back runner (9) and communicate, in push back runner (9) the other end towards exporting (49); And rotor shaft (1) and rotation, be meshing with each other from rotor (2), four axially extended sealing strips of synchronized generation constitute A, B, C and four working spaces of D.
2. a kind of four lines engagement inner pressuring sealing new pump according to claim 1, it is characterized in that: " O " type ring recess, the central axis O of central through bore (41) are with in central through bore (41) lining on the said pump housing (4)
2Central axis O with off-centre half hole (42)
1Between have throw of eccentric t; Crescent shape suction inlet (47) UNICOM on the bottom plane (40) import (46); Another crescent shape row mouthful (48) UNICOM on the bottom plane (40) outlet (49), outlet (49) have a bypass in push back runner (9) and lead to the back side of compensating disc (6) and the space between the eccentric end cap (5).
3. a kind of four lines engagement inner pressuring sealing new pump according to claim 1; It is characterized in that: said rotor shaft (1) comprises four five equilibrium cambered surface active sections (13) and does not have keyway shaft part (11) and shaft with keyway section (12); The work inner end of four five equilibrium cambered surface active sections (13) is pasting bottom plane (40), and the work exterior edge face of four five equilibrium cambered surface active sections (13) is being pasted by the horizontal frontal plane of compensating disc (6).
4. a kind of four lines engagement inner pressuring sealing new pump according to claim 1; It is characterized in that: saidly comprise complete section of five five equilibrium cambered surfaces, the size equal uniform of the width of full section both ends of the surface and the both ends of the surface width of four five equilibrium cambered surface active sections (13) from rotor (2).
5. a kind of four lines engagement inner pressuring sealing new pump according to claim 1 is characterized in that: the central axis O of band " O " the type ring recess through hole (61) on the compensating disc (6)
2Central axis O with band " O " type ring recess cylindrical (62)
1Between have throw of eccentric t, the eccentric positioning hole (67) of compensating disc (6) and locating stud (7) are slidingly matched.
6. a kind of four lines engagement inner pressuring sealing new pump according to claim 1 is characterized in that: the central axis O of described rotor shaft (1)
2With central axis O from rotor (2)
1Between have throw of eccentric t; Four five equilibrium cambered surface active sections (13) of rotor shaft (1) and between five five equilibrium cambered surfaces of rotor (2), rotation, being meshing with each other; Four point of contact of synchronized generation; Cross point of contact and form four axially extended sealing strips,, constitute A, B, C and four working spaces of D in conjunction with the horizontal frontal plane of bottom plane (40) and compensating disc (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201954803U CN202187910U (en) | 2011-06-01 | 2011-06-01 | Novel four-wire meshing internal pressure seal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201954803U CN202187910U (en) | 2011-06-01 | 2011-06-01 | Novel four-wire meshing internal pressure seal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202187910U true CN202187910U (en) | 2012-04-11 |
Family
ID=45919365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201954803U Expired - Fee Related CN202187910U (en) | 2011-06-01 | 2011-06-01 | Novel four-wire meshing internal pressure seal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202187910U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182677A (en) * | 2011-06-01 | 2011-09-14 | 张意立 | Novel four-line meshed internal-pressure sealed pump |
-
2011
- 2011-06-01 CN CN2011201954803U patent/CN202187910U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182677A (en) * | 2011-06-01 | 2011-09-14 | 张意立 | Novel four-line meshed internal-pressure sealed pump |
| CN102182677B (en) * | 2011-06-01 | 2016-04-27 | 张意立 | A kind of four line engagement inner pressuring sealing new pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120411 Termination date: 20150601 |
|
| EXPY | Termination of patent right or utility model |