CN202971173U - Novel gear pump - Google Patents
Novel gear pump Download PDFInfo
- Publication number
- CN202971173U CN202971173U CN 201220543249 CN201220543249U CN202971173U CN 202971173 U CN202971173 U CN 202971173U CN 201220543249 CN201220543249 CN 201220543249 CN 201220543249 U CN201220543249 U CN 201220543249U CN 202971173 U CN202971173 U CN 202971173U
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- gear
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- slidably matched
- driven shaft
- air bag
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Abstract
The utility model discloses a novel gear pump. The novel gear pump comprises a driving shaft, a right driven shaft, a left driven shaft, a main gear, a right sub-gear, a left sub-gear, a front outer end cover, a rear outer end cover, a middle gasbag ring, a right gasbag ring, a left gasbag ring and a pump body. The novel gear pump is characterized in that two arc sections at the center of an inner cavity of the pump body are in sliding fit with the outer circle of the main gear; the right large half arc section of the inner cavity of the pump body is in sliding fit with the outer circle of the right sub-gear, and the left large half circular arc section of the inner cavity of the pump body is in sliding fit with the outer circle of the left sub-gear; the driving shaft at the center of the main gear is parallel with the right driven shaft at the center of the right rub-gear, and is also parallel with the left driven shaft at the center of the left sub-gear; the flat surface in a rear cover of the rear outer end cover is fixed on the rear end surface of the pump body in an enclosed manner, and the flat surface in a front cover of the front outer end cover is fixed on the front end surface of the pump body in the enclosed manner; and the front flat surface of an end surface compensating disc simultaneously attaches to the main gear, the right sub-gear and the left sub-gear, and the middle gasbag ring, the right gasbag ring and the left gasbag ring are respectively arranged on the back surface of the end surface compensating disc and the flat surface of the inner side of the front outer end cover as well as between the end surface compensating disc and the front outer end cover.
Description
Technical field
The utility model belongs to mechanical engineering field, and International Classification of Patents is the F04D non-varactor pump, relates to a kind of transformation of energy rotary volume pump that mechanical energy is converted to the fluid pressure energy, refers to especially a kind of gear pump.
Background technique
Known gear pump is all the mated gear pump in work, because inlet outlet pressure differential is larger, certainly will cause gear one-sided stressed, particularly driving gear is one-sided stressed, directly cause the uneven wear leakage in advance of driving gear shaft place, cause the gear pump life-span short, boost in pressure is restricted.Perplex gear pump always and can not get effective problem that solves in addition: after long-term high speed operation, must wearing and tearing of its end face can not get effective compensation.China's license notification number: CN1059019C pendulum rotary vane pump; China's license notification number: CN100374725C rotating vane pump; China's license notification number: CN1316162C medium-high pressure gear pump having asymmetric double-circular-arc gear shape; China's license notification number: CN1081750C is with the internal gear pump of plastic shell; China's license notification number: CN101120175B and China's license notification number: a CN101403382B gear pump for micro-miniature turbojet engine etc. are showed no practicable method and solve the stressed asymmetric of gear pump and end wear gap control problem.
Summary of the invention
The purpose of this utility model is to provide a kind of gear pump, adopts the symmetrical stressed structure of driving gear and end wear compensation isolation technology, to realize simultaneously the technological gap of symmetrical stressed and end wear auto-compensation.
To achieve these goals, the utility model provides following technological scheme:
A kind of gear pump, comprise driving shaft, right driven shaft, left driven shaft, master gear, right from gear, left from gear, front outer end cap, rear outer end cap, air bag ring, the right ring of air bag, the left ring of air bag, the pump housing, as improvement: two sections, the center of described pump housing inner chamber arc and master gear cylindrical are slidably matched; Right more than half circular arc of described pump housing inner chamber is slidably matched from top circle with right; Left more than half circular arc of described pump housing inner chamber is slidably matched from top circle with left; The driving shaft at described master gear center parallels with the right driven shaft of the described right side from Gear center; The driving shaft at described master gear center parallels with the left driven shaft of a described left side from Gear center; 4 to 12 rear end cover screws are fixed on described pump housing ear end face from the bonnet counterbore with the bonnet inner plane of described rear outer end cap is airtight; After 4 to 12, the front cover screw is fixed on described pump housing front-end face from the protecgulum counterbore with the protecgulum inner plane of described front outer end cap is airtight; Described end-face compensate dish horizontal frontal plane is pasting master gear and right from gear and left from gear simultaneously; The described end-face compensate dish back side and described front outer end cap inner side plane and between ring and the right ring of air bag and the left ring of air bag are arranged respectively in air bag.
As further improvement: described master gear with right from gear with leftly equate from the gear width; Described master gear is spent at a distance of 180 from gear and left being meshed from gear synchronous with right.
As further improvement: described bonnet inner plane is pasting master gear and right from gear and left ear end face from gear simultaneously; After during described bonnet inner plane has, through hole and driving shaft rear end section are slidably matched; Described bonnet inner plane has rear right blind hole and right driven shaft rear end section to be slidably matched; Described bonnet inner plane has rear left blind hole and right driven shaft rear end section to be slidably matched.
As further improvement: described end-face compensate dish horizontal frontal plane is pasting master gear and right from gear and left front-end face from gear simultaneously; Have respectively in dish the scrobicular ring isolation be fixed wtih a side of encircling in air bag on the described end-face compensate dish back side, coil the side that right scrobicular ring isolation is fixed wtih the right ring of air bag, the scrobicular ring of facing left is isolated a side that is fixed wtih the left ring of air bag.
As further improvement: described protecgulum inner plane is pasting in air bag ring and the right ring of air bag and the left ring of air bag another side simultaneously; Have on described protecgulum inner plane seal ring before band in before through hole and driving shaft front end rigion be slidably matched, the driving shaft front end rigion passes through outside front outer end cap and has located main shaft key; Described protecgulum inner plane has front right blind hole and right driven shaft front end rigion to be slidably matched, and does not contact bottom surface, front right hole; Described protecgulum inner plane has front left blind hole and right driven shaft front end rigion to be slidably matched, and does not contact bottom surface, front left hole.
As further improvement: have on described bonnet inner plane seal ring after band in after through hole and driving shaft rear end section be slidably matched; Described bonnet inner plane has rear right blind hole and right driven shaft rear end section to be slidably matched, and does not contact bottom surface, rear right hole; Described bonnet inner plane has rear left blind hole and right driven shaft rear end section to be slidably matched, and does not contact bottom surface, rear left hole.
As further improvement: before described end-face compensate dish has compensating disc mesopore and driving shaft, the middle-end section is slidably matched; Before described end-face compensate dish has the right hole of compensating disc and right driven shaft, the middle-end section is slidably matched; Described end-face compensate dish has the compensation front middle-end section of hole and left driven shaft of facing left to be slidably matched; Two sections arcs of the disk center that described end-face compensate dish is placed outward, the right outlet arc of dish, the right import arc of dish, the outlet arc of facing left, face left import arc and the right more than half circular arc of dish, more than half circular arc of facing left are slidably matched with the right more than half circular arc of two sections, center arc, the right outlet arc of body, the right import arc of body, the left outlet arc of body, the left import arc of body and the body of described pump housing inner chamber, the left outlet arc of body respectively.
As further improvement: the right outlet arc of described body is connected with right export pipeline; The right import arc of described body is connected with right inlet ductwork; The left outlet arc of described body is connected with left export pipeline; The left import arc of described body is connected with left inlet ductwork.
The beneficial effects of the utility model are: adopt three gears to reach the compact structure of twice flow, make be positioned in the middle of the symmetrical stressed complete equilibrium that obtains of master gear, guarantee uniquely to be in the main gear shaft long-time running of sealing state without wearing and tearing.No matter pass in and out pipeline pressure reduction much, master gear is meshed from gear synchronous from gear and a left side with right at a distance of 180 degree, the overall stressed complete equilibrium that obtains of master gear, wearing and tearing, also full symmetric is even, can keep master gear and right from gear and left from leaking in long-time pressurize operation between gear, and guarantee seal ring (61) before band on driving shaft 11 and protecgulum inner plane in before the long-time effective sealing of through hole do not leak outside.
The axial rebounding force that produces by means of ring and the right ring of air bag and the left ring of air bag in air bag, make the horizontal frontal plane of end-face compensate dish be close to simultaneously master gear and right from gear and left front-end face from gear, force master gear and the right side to be close to the bonnet inner plane from gear and a left side from the ear end face of gear, guarantee that the utility model is in high-efficiency operation all the time.The utility model realizes also possessing simultaneously radial force balancing technique and axial end wear compensation gap control technology, and is novel, simple in structure, the convenient manufacturing, and the market application potential is huge.
Description of drawings
Fig. 1 is the whole sectional drawing by three main axiss of the utility model;
Fig. 2 is the P-P sectional view in Fig. 1;
Fig. 3 is the sectional view in Q-Q cross section in Fig. 1;
Fig. 4 is the back side stereogram of the end-face compensate dish 40 in Fig. 1;
Fig. 5 is R-R sectional view in Fig. 3.
Embodiment
In conjunction with the accompanying drawings and embodiments, further structure of the present utility model and working principle are elaborated:
In Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a kind of gear pump, comprise driving shaft 11, right driven shaft 12, left driven shaft 13, master gear 21, right from gear 22, leftly encircle 81 from gear 23, front outer end cap 50, rear outer end cap 70, air bag, the right ring 82 of air bag, the left ring 83 of air bag, the pump housing 90, as improvement: two sections, the center arc 91 on the described pump housing 90 inner chambers is slidably matched with master gear 21 cylindricals; Right more than half circular arc 92 on the described pump housing 90 inner chambers is slidably matched from gear 22 cylindricals with right; Left more than half circular arc 93 on the described pump housing 90 inner chambers is slidably matched from gear 22 cylindricals with left; The driving shaft 11 at described master gear 21 centers and the described right side parallel from the right driven shaft 12 at gear 22 centers; The driving shaft 11 at described master gear 21 centers and a described left side parallel from the left driven shaft 13 at gear 23 centers; 4 to 12 rear end cover screws 40 from bonnet counterbore 76 with the airtight described pump housing end face after 90s that is fixed on of the bonnet inner plane 79 of described rear outer end cap 70; After 4 to 12, front cover screw 60 is fixed on the described pump housing 90 front-end faces from protecgulum counterbore 56 with the protecgulum inner plane 59 of described front outer end cap 50 is airtight; Described end-face compensate dish 30 horizontal frontal planes are pasting master gear 21 and right from gear 22 and left from gear 23 simultaneously; Described end-face compensate dish 30 back sides and described front outer end cap 50 inner side plane and between ring 81 and the right ring 82 of air bag and the left ring 83 of air bag are arranged respectively in air bag.
As further improvement: described master gear 21 with right from gear 22 with leftly equate from gear 23 width; Described master gear 21 meshes at a distance of 180 degree from gear 22 locking phases from gear 22 and a left side with right.
As further improvement: described bonnet inner plane 79 is pasting master gear 21 and right from gear 22 and left ear end face from gear 23 simultaneously; After during described bonnet inner plane 79 has, through hole 71 is slidably matched with driving shaft 11 rear end section; Described bonnet inner plane 79 has rear right blind hole 72 and right driven shaft 12 rear end section to be slidably matched; Described bonnet inner plane 79 has rear left blind hole 73 and right driven shaft 13 rear end section to be slidably matched.
As further improvement: described end-face compensate dish 30 horizontal frontal planes are pasting master gear 21 and right from gear 22 and left front-end face from gear 23 simultaneously; Have respectively 37 isolation of scrobicular ring in dish to be fixed wtih a side of ring 81 in air bag on described end-face compensate dish 30 back sides, coil the side that right scrobicular ring 38 isolation are fixed wtih the right ring 82 of air bag, the scrobicular ring 39 of facing left is isolated a side that is fixed wtih the left ring 83 of air bag.
As further improvement: described protecgulum inner plane 59 is pasting in air bag ring 81 and the right ring 82 of air bag and the left ring of air bag 83 another sides simultaneously; Have on described protecgulum inner plane 59 seal ring 61 before band in before through hole 51 be slidably matched with driving shaft 11 front end rigions, driving shaft 11 front end rigions pass through outside front outer end cap 50 and have located main shaft key 17; Described protecgulum inner plane 59 has front right blind hole 52 and right driven shaft 12 front end rigions to be slidably matched, and does not contact bottom surface, front right hole 62; Described protecgulum inner plane 59 has front left blind hole 53 and right driven shaft 13 front end rigions to be slidably matched, and does not contact bottom surface, front left hole 63.
As further improvement: have on described bonnet inner plane 79 seal ring 41 after band in after through hole 71 be slidably matched with driving shaft 11 rear end section; Described bonnet inner plane 79 has rear right blind hole 72 and right driven shaft 12 rear end section to be slidably matched, and does not contact bottom surface, rear right hole 42; Described bonnet inner plane 79 has rear left blind hole 73 and right driven shaft 13 rear end section to be slidably matched, and does not contact bottom surface, rear left hole 43.
As further improvement: described end-face compensate dish 30 has compensating disc mesopore 31 and the front middle-end section of driving shaft 11 to be slidably matched; Described end-face compensate dish 30 has the right hole 32 of compensating disc and the front middle-end section of right driven shaft 12 to be slidably matched; Described end-face compensate dish 30 has compensation face left hole 33 to be slidably matched with the front middle-end section of left driven shaft 13; The outer two sections arcs 34 of disk center placed of described end-face compensate dish 30, the right outlet arc 69 of dish, the right import arc 67 of dish, the outlet arc 66 of facing left, face left import arc 68 and the right more than half circular arc 35 of dish, face left more than half circular arc 36 respectively with the described pump housing 90 inner chambers on the right more than half circular arc 92 of two sections, center arc 91, the right outlet arc 89 of body, the right import arc 87 of body, the left outlet arc 86 of body, the left import arc 88 of body and body, the left outlet arc 93 of body be slidably matched.
As further improvement: the right outlet arc 89 of described body is connected with right export pipeline 49; The right import arc 87 of described body is connected with right inlet ductwork 47; The left outlet arc 86 of described body is connected with left export pipeline 46; The left import arc 88 of described body is connected with left inlet ductwork 48.
Embodiment's installation steps and working principle are described as follows:
Installation steps:
In Fig. 1, it is 17 numbers of teeth that embodiment selects master gear 21, and right is respectively 17 numbers of teeth from gear 22 and a left side from gear 23.8 rear end cover screws 40 place the airtight described pump housing end face after 90s that is fixed on of rear lid gasket 78 from bonnet counterbore 76 with the bonnet inner plane 79 of described rear outer end cap 70.
Driving shaft 11 is tightened to one in advance with master gear 21, and right driven shaft 12 is tightened to one with right in advance from gear 22, and left driven shaft 13 is tightened to one with left in advance from gear 23.
After in driving shaft 11 rear ends insertion bonnet inner planes 79, through hole 71 passes rear middle seal ring 41 and outer stretching, right driven shaft 12 rear ends are inserted the rear right blind hole 72 of bonnet inner planes 79 but are not contacted bottom surface, rear right hole 42, and right driven shaft 13 rear ends are inserted the rear left blind hole 73 of bonnet inner planes 79 but do not contact bottom surface, rear left hole 43.
End-face compensate dish 30 horizontal frontal planes are being pasted master gear 21 and right from gear 22 and left front-end face from gear 23 simultaneously.Compensating disc mesopore 31 and the front middle-end section of driving shaft 11 of end-face compensate dish 30 are slidably matched, the right hole of the compensating disc of end-face compensate dish 30 32 is slidably matched with the front middle-end section of right driven shaft 12, and the compensation of end-face compensate dish 30 hole 33 of facing left is slidably matched with the front middle-end section of left driven shaft 13.
Ring 81 1 sides during scrobicular ring 37 isolation fix air bag in the dish on end-face compensate dish 30 back sides respectively coils right scrobicular ring 38 isolation and are fixed the right ring of air bag 82 1 sides, and the scrobicular ring 39 of facing left is isolated and fixed the left ring of air bag 83 1 sides.
Rear through hole 71 in seal ring 41 after band on the bonnet inner plane 79 of rear outer end cap 70 is slidably matched with driving shaft 11 rear end section; Rear right blind hole 72 and right driven shaft 12 rear end section of bonnet inner plane 79 are slidably matched, and do not contact bottom surface, rear right hole 42; Rear left blind hole 73 and right driven shaft 13 rear end section of bonnet inner plane 79 are slidably matched, and do not contact bottom surface, rear left hole 43.
From protecgulum counterbore 56, the protecgulum inner plane 59 of described front outer end cap 50 is placed with 8 rear end cover screws 60 that front cover gasket 58 is airtight is fixed on the described pump housing 90 front-end faces.Make protecgulum inner plane 59 paste simultaneously in air bag ring 81 and the right ring 82 of air bag and the left ring of air bag 83 another sides, install.
Working principle:
In embodiment, external force by main shaft key 17 input, is turned clockwise by the related master gear 21 of driving shaft 11, by master gear 21 with right from gear 22 and left synchronize from gear 23 intermeshing, order about right from gear 22 with a left side from gear 23 opposite spins.Right inlet ductwork 47 and left inlet ductwork 48 be feed liquor simultaneously, and right export pipeline 49 and left export pipeline 46 be fluid simultaneously.
No matter pass in and out pipeline pressure reduction much, master gear 21 is at a distance of 180 degree and right from gear 22 and left from gear 23 locking phase engagements, the overall stressed complete equilibrium that obtains of master gear 21, wearing and tearing, also full symmetric is even, can keep master gear 21 and right from gear 22 and left from leaking in long-time pressurize operation between gear 23, and guarantee seal ring 61 before band on driving shaft 11 and protecgulum inner plane 59 in before the long-time effective sealing of through hole 51 do not leak outside.
The right side is revolved to turn around from gear 22 liquid of right inlet ductwork 47 is sent into right export pipeline 49; A left side is revolved to turn around from gear 23 liquid of left inlet ductwork 48 is sent into left export pipeline 46, goes round and begins again.
After long-time running, master gear 21 and right from gear 22 and left both ends of the surface wearing and tearing from gear 23, can use has respectively on end-face compensate dish 30 back sides that in dish, scrobicular ring 37 isolation are fixed wtih ring 81 1 sides in air bag, coil 38 isolation of right scrobicular ring and be fixed wtih the right ring of air bag 82 1 sides, scrobicular ring 39 isolation of facing left are fixed wtih the left ring of air bag 83 1 sides.Utilize protecgulum inner plane 59 pasting simultaneously in air bag the rebounding force that ring 81 and the right ring 82 of air bag and the left ring of air bag 83 another sides produce, force end-face compensate dish 30 horizontal frontal planes pasting simultaneously master gear 21 and right from gear 22 and left front-end face from gear 23, then force master gear 21 and right from gear 22 and the left bonnet inner plane 79 that is pasting simultaneously rear outer end cap 70 from the ear end face of gear 23, guarantee internal leakage does not occur between the long-play ear end face, realize high-voltage operation.
Claims (8)
1. gear pump, comprise driving shaft (11), right driven shaft (12), left driven shaft (13), master gear (21), right from gear (22), left (81), the right ring of air bag (82), the left ring of air bag (83), the pump housing (90) of encircling from gear (23), front outer end cap (50), rear outer end cap (70), air bag, it is characterized in that: the two sections arcs in center (91) on the described pump housing (90) inner chamber are slidably matched with master gear (21) cylindrical; Right more than half circular arc (92) on the described pump housing (90) inner chamber is slidably matched from gear (22) cylindrical with right; Left more than half circular arc (93) on the described pump housing (90) inner chamber is slidably matched from gear (23) cylindrical with left; The driving shaft (11) at described master gear (21) center and the described right side parallel from the right driven shaft (12) at gear (22) center; The driving shaft (11) at described master gear (21) center and a described left side parallel from the left driven shaft (13) at gear (23) center; 4 to 12 rear end cover screws (40) from bonnet counterbore (76) with the airtight described pump housing (90) ear end face that is fixed on of the bonnet inner plane (79) of described rear outer end cap (70); After 4 to 12 front cover screw (60) from protecgulum counterbore (56) with the airtight described pump housing (90) front-end face that is fixed on of the protecgulum inner plane (59) of described front outer end cap (50); Described end-face compensate dish (30) horizontal frontal plane is pasting master gear (21) and right from gear (22) and left from gear (23) simultaneously; Described end-face compensate dish (30) back side and described front outer end cap (50) inner side plane and between ring (81) and the right ring of air bag (82) and the left ring of air bag (83) are arranged respectively in air bag.
2. a kind of gear pump according to claim 1 is characterized in that: described master gear (21) with right from gear (22) and leftly equate from gear (23) width; Described master gear (21) meshes at a distance of 180 degree from gear (22) locking phase from gear (22) and a left side with right.
3. a kind of gear pump according to claim 1 is characterized in that: described bonnet inner plane (79) is pasting master gear (21) and right from gear (22) and left ear end face from gear (23) simultaneously; After during described bonnet inner plane (79) has, through hole (71) is slidably matched with driving shaft (11) rear end section; Described bonnet inner plane (79) has rear right blind hole (72) and right driven shaft (12) rear end section to be slidably matched; Described bonnet inner plane (79) has rear left blind hole (73) and right driven shaft (13) rear end section to be slidably matched.
4. a kind of gear pump according to claim 1 is characterized in that: described end-face compensate dish (30) horizontal frontal plane is pasting master gear (21) and right from gear (22) and left front-end face from gear (23) simultaneously; There is respectively scrobicular ring in dish (37) isolation to be fixed wtih a side of ring (81) in air bag on described end-face compensate dish (30) back side, coil right scrobicular ring (38) and isolate a side that is fixed wtih the right ring of air bag (82), the scrobicular ring of facing left (39) isolation is fixed wtih a side of the left ring of air bag (83).
5. a kind of gear pump according to claim 1 is characterized in that: described protecgulum inner plane (59) is pasting in air bag ring (81) and the right ring of air bag (82) and the left ring of air bag (83) another side simultaneously; Have on described protecgulum inner plane (59) seal ring (61) before band in before through hole (51) and driving shaft (11) front end rigion be slidably matched, driving shaft (11) front end rigion passes through and located main shaft key (17) outside front outer end cap (50); Described protecgulum inner plane (59) has front right blind hole (52) and right driven shaft (12) front end rigion to be slidably matched, and does not contact bottom surface, front right hole (62); Described protecgulum inner plane (59) has front left blind hole (53) and right driven shaft (13) front end rigion to be slidably matched, and does not contact bottom surface, front left hole (63).
6. a kind of gear pump according to claim 1 is characterized in that: have on described bonnet inner plane (79) seal ring (41) after band in after through hole (71) be slidably matched with driving shaft (11) rear end section; Described bonnet inner plane (79) has rear right blind hole (72) and right driven shaft (12) rear end section to be slidably matched, and does not contact bottom surface, rear right hole (42); Described bonnet inner plane (79) has rear left blind hole (73) and right driven shaft (13) rear end section to be slidably matched, and does not contact bottom surface, rear left hole (43).
7. a kind of gear pump according to claim 1 is characterized in that: described end-face compensate dish (30) has compensating disc mesopore (31) and the front middle-end section of driving shaft (11) to be slidably matched; Described end-face compensate dish (30) has the right hole of compensating disc (32) and the front middle-end section of right driven shaft (12) to be slidably matched; Described end-face compensate dish (30) has face left hole (33) and the front middle-end section of left driven shaft (13) of compensation to be slidably matched; the outer two sections arcs of disk center (34) placed of described end-face compensate dish (30), coil right outlet arc (69), coil right import arc (67), face left and export arc (66), face left import arc (68) and the right more than half circular arc (35) of dish, face left more than half circular arc (36) respectively with the described pump housing (90) inner chamber on the two sections arcs in center (91), the right outlet arc of body (89), the right import arc of body (87), the left outlet arc of body (86), the right more than half circular arc (92) of the left import arc of body (88) and body, the left outlet arc of body (93) is slidably matched.
8. a kind of gear pump according to claim 7, it is characterized in that: the right outlet arc of described body (89) is connected with right export pipeline (49); The right import arc of described body (87) is connected with right inlet ductwork (47); The left outlet arc of described body (86) is connected with left export pipeline (46); The left import arc of described body (88) is connected with left inlet ductwork (48).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220543249 CN202971173U (en) | 2012-10-04 | 2012-10-04 | Novel gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220543249 CN202971173U (en) | 2012-10-04 | 2012-10-04 | Novel gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202971173U true CN202971173U (en) | 2013-06-05 |
Family
ID=48512257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220543249 Expired - Fee Related CN202971173U (en) | 2012-10-04 | 2012-10-04 | Novel gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202971173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878075A (en) * | 2012-10-04 | 2013-01-16 | 张意立 | Novel gear pump |
-
2012
- 2012-10-04 CN CN 201220543249 patent/CN202971173U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878075A (en) * | 2012-10-04 | 2013-01-16 | 张意立 | Novel gear 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: 20130605 Termination date: 20151004 |
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| EXPY | Termination of patent right or utility model |