CN202847680U - Malfunction prevention braking main valve - Google Patents
Malfunction prevention braking main valve Download PDFInfo
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- CN202847680U CN202847680U CN 201220474093 CN201220474093U CN202847680U CN 202847680 U CN202847680 U CN 202847680U CN 201220474093 CN201220474093 CN 201220474093 CN 201220474093 U CN201220474093 U CN 201220474093U CN 202847680 U CN202847680 U CN 202847680U
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Abstract
The utility model discloses a malfunction prevention braking main valve which comprises an upper valve body, a middle valve body and a lower valve body. The upper valve body is used for providing pushing power. The middle valve body is an air pressure valve structure of normal condition. The lower valve body is used for timely and effectively compensating braking torque through carrying out deflation control on an air outlet when a system fails and causes blocking, stuck components, air pressure reduction and rapid leakage, and is capable of achieving that when front wheels fail, the front wheels are remedied, when rear wheels fail, the rear wheels are remedied, and when the whole car fails, the whole car is remedied. A malfunction prevention braking system which is composed of the malfunction braking main valve and other components has the advantages of being high in safety and reliability, superior in performance, simple in structure, convenient to install, good in practical applicability, good in social benefit and economic benefit, wide in development prospect and easy to popularize.
Description
Technical field
The utility model relates to a kind of brake activation valve in the brake system of car, particularly relates to a kind of automobile with preventing malfunctioning main brake valve.
Background technology
Brake failure and bad minute back axle, propons and full car---and since the gas braking technology be mainly used in, full-sized car, and often, the full-sized car operating mode is relatively poor and the many reasons such as traditional braking technological deficiency easily causes brake failure, poor stop.Badly influence the braking reliability such as: cryogenic system pipeline ponding obstruction, the system element ponding many factors such as hair fastener, high low temperature system pipes part and component wear gas leakage that freeze that freeze.
According to traditional gas braking technology safety basic demand, also must possess following two auxiliary brakings when possessing the main brake function.1. spring energy-storage braking: its objective is Parking and driving emergency brake; 2. slow braking: its objective is to rise under given conditions and stablize inertia and driving emergency brake.The essential defect that the traditional braking technology exists is: a little less than spring energy-storage braking and the slow lock torque, and only control trailing wheel 1.; 2. in order to prevent braking force overload damage drg and linkage unit, design upper spring storage brake can not overlap use with main brake.Therefore the emergent usefulness of traditional braking technology is relatively poor when main brake is malfunctioning and bad, and given indicating brake action loses artificial safe range internal control speed and parking timely and reasonably.
The consequence that brake failure and poor stop bring is the generation of major traffic accidents often, easily causes casualties, damaged vehicle and common facilities damage, to country and individual harm or loss.
The utility model content
The utility model provides a kind of automobile with preventing malfunctioning main brake valve for the problem and shortage that the brake activation valve in the existing brake system of car exists.
Technical scheme: a kind of anti-malfunctioning main brake valve, comprise the upper valve body that is tightly connected successively, middle valve body and lower valve body from top to bottom, wherein, be set with valve seat in the upper valve body, the top, lower end of valve seat is connected with the central movable of a lateral balance lever or docks, and the two ends of this horizontal parallel bar contact with the thimble of two symmetries respectively; Perhaps top, the lower end of valve seat directly contacts with a thimble;
The inside of middle valve body and lower valve body is respectively arranged with convex platform and lower bulge;
At middle valve body inner seal sleeve upper piston is housed, described thimble is positioned at center, upper piston upper end; The upper end of upper piston arranges flanging, is connected by spring between this flanging and the described convex platform; The outside, lower end at upper piston is set with valve seat, the upper and lower end of valve seat is respectively arranged with valve and lower valve, upper and lower valve respectively with valve seat between sealing contact and be connected by spring, wherein go up valve and cooperate the formation valve mechanism with the convex platform downside, lower valve cooperates the formation valve mechanism with the lower bulge upper side; The epimere external diameter of upper piston forms step greater than the hypomere external diameter, and this step is positioned near the convex platform or a little more than convex platform, and the step surface of described step cooperates formation valve drive configuration with upper valve; Side at upper valve body is disposed with air gate and induction opening from top to bottom, and wherein admission port is positioned at the convex platform downside, and air extractor duct is positioned at the convex platform upside; Be provided with the through hole that is communicated with its inner chamber in the upper piston bottom, be provided with the through hole corresponding with the upper piston bottom through-hole on the valve seat;
At lower valve body inner seal sleeve piston bush is housed, at the piston bush inner seal sleeve lower piston is housed, the upper end sealing shroud is equipped with middle piston in piston head, and wherein lower piston is arranged in the piston inboard; Be provided with the hollow channel that is connected in the upper and lower piston; The middle part of lower piston is provided with outward flange, and the inwall middle part of piston bush is provided with inward flange, and described outward flange is positioned at the inward flange downside; The upper end of described middle piston contacts with described lower valve;
The upper and lower end of piston bush is respectively arranged with upper and lower catch, and the lower end of middle piston is provided with the evagination part that contacts with the piston bush sealing, and this evagination partly is positioned at the upper stop piece downside; The lower stop piece upside of piston bush is provided with an annular elastomeric spring abutment, is connected by spring between the outward flange of lower piston and the annular elastomeric spring abutment, and the evagination part of middle piston is connected by spring with the inward flange of piston bush;
Be disposed with from top to bottom control air extractor duct and control admission port at lower body wall, have the Sealed sandwich chamber between piston bush and lower valve body, the control admission port is communicated with this interlayer chamber, is provided with simultaneously the through hole that is communicated with between interlayer chamber and the inside and outside flange;
Lower valve body lower end inner seal sleeve is equipped with plug, forms the interlayer chamber between plug and the described spring chair, and this interlayer chamber is connected with the control air extractor duct, and its passage is positioned at lower body wall.
Described plug hollow, its inner chamber communicates with the lower piston inner chamber, and the end of plug is provided with the noise control net.
Be connected by spring between described plug and the annular elastomeric spring abutment.
Described valve seat is with base plate, and base plate center band is fluted, and groove one side arranges deflation hole; Valve seat upper end inner seal is set with tip-lever support, is connected with retracing spring between tip-lever support circumferential edges and the valve seat base plate; Center, tip-lever support lower end is with valve rod, and this valve rod coupling is inserted in the described bottom plate groove; Center, tip-lever support upper end is provided with the push rod groove, and the push rod groove is used for installing push rod; Be tightly connected between tip-lever support upper end and the upper valve body.
Be provided with spherical groove on the top, lower end of valve seat, the lateral balance lever upper center is provided with spherical groove, and Matching installation has steel ball in the groove.
Be positioned on one section lower piston sidewall of described outward flange downside and annular elastomeric spring abutment upside, be provided with through hole.
Described valve seat is the internal and external casing structure, and its inner sleeve coupling is sleeved on the valve outside, and the middle part of its outer tube and inner sleeve is connected to form upper and lower circular groove; Described upper and lower valve is respectively the internal and external casing structure, and the bottom of the internal and external casing of upper valve and lower valve is connected to form circular groove; The annular groove wall of upper and lower valve is tightly connected with the upper and lower annular groove wall of valve seat respectively, and described spring is positioned at circular groove.
Beneficial effect: 1, the anti-malfunctioning main brake valve of the utility model is one of a kind of brake system constituent elements: anti-malfunctioning main brake valve coupling system element forms brake system, can accomplish to reduce and when leaking rapidly because of system failure obstruction, parts hair fastener, air pressure, by control that the control air extractor duct is exitted, compensate timely and effectively lock torque, can accomplish that front-wheel is malfunctioning to remedy that front-wheel, trailing wheel are malfunctioning remedies that trailing wheel, full car are malfunctioning remedies full car.
2, the anti-malfunctioning main brake valve of the utility model not only easy for installation, the entrucking cost is low but also operate nimble, superior performance, has improved significantly the defectives such as above-mentioned conventional art brake failure and poor stop.Solved automobile air brake technology existence technical barrier for a long time, the anti-malfunctioning brake system safe reliability that the anti-malfunctioning main brake valve of the utility model and other element form is high, superior performance, simple in structure, easy for installation, practical, have stronger social benefit and economic benefits, development prospect is open, easily promotes.
Description of drawings:
Fig. 1 be the anti-malfunctioning main brake valve of the utility model partly cut open one of structural representation;
Fig. 2 be the anti-malfunctioning main brake valve of the utility model partly cut open two of structural representation.
Number in the figure: 1. guard shield, 2. noise suppression network, 3. plug, 4. circlip, 5. spring, 6. black nut, 7. circlip, 8. piston, 9. spring, 10. piston bush, 11. bolt, 12. spring, 13. circlip, 14. middle piston, 15. lower valve body, 16. middle valve body, 17. upper piston, 18. spring, 19. circlip, 20. thimble, 21. lateral balance lever, 22. steel ball, 23. collar, 24. dust protecting cap, 25. circlip, 26. push rod, 27. O type circle, 28. safety washer, 29. O type circle, 30. O type circle, 31. O type circle, 32. O type circle, 33. O type circle, 34. O type circle, 35. O type circle, 36. O type circle, 37. lower valve, 38. packing seal, 39. valve spring, 40. valve seat, 41. upper valve, 42. valve spring, 43. O type circle 44. upper valve bodies, 45. retracing spring (pre-compressed spring), 46. rubber balance spring, 47. tip-lever support, 48. antifriction ring, 49. dummy piston, 50. circlip, 51. through hole, 52. passage, 53. through hole, 54. admission port, 55. air extractor duct, 56. control admission port, 57. control air extractor duct, 58. exhausr port, 59. annular elastomeric spring abutment, 60. convex platform, 61. lower bulge, 62. inward flange, 63. outward flange, 64. valve seat, 65 is through hole.
The specific embodiment
Embodiment 1: referring to Fig. 1 and Fig. 2, anti-malfunctioning main brake valve comprises upper valve body 44, middle valve body 16 and the lower valve body 15 that is tightly connected successively from top to bottom.
In the cross-sectional view of Fig. 1 about upper valve body, be set with valve seat 64 in the upper valve body 44, valve seat 64 is with base plate, and protrude downwards at the base plate center, and the bottom of protrusion is the top, and the top of protrusion is groove, and groove one side arranges deflation hole.The upper end inner seal of valve seat 64 is set with tip-lever support 47, is connected with retracing spring 45 between tip-lever support 47 circumferential edges and the valve seat base plate; Center, tip-lever support 47 lower end is with valve rod, and this valve rod coupling is inserted in the described bottom plate groove; Center, tip-lever support 47 upper end is provided with the push rod groove, and the push rod groove is used for installing push rod 26; Be tightly connected by dust protecting cap 24 between tip-lever support 47 upper ends and the upper valve body 44.
The lower end of valve seat 64 is provided with spherical groove, lateral balance lever 21(lever on the top) upper center is provided with spherical groove, and Matching installation has steel ball 22 in two grooves.The two ends of this horizontal parallel bar 21 contact with the thimble 20 of two symmetries respectively, and two thimble 20 corresponding two cover brake system satisfy the effect of front-rear axle synchronous brake.When push rod 26 is applied downward pressure, tip-lever support 47 moves down, the valve rod of tip-lever support lower end enters in valve seat 64 bottom grooves and to drive valve seat 64 and move down together, the top of valve seat 64 bottoms promotes steel ball 22, steel ball 22 promotes horizontal parallel bar 21, and laterally the two ends of parallel bar drive two thimbles 20 simultaneously.
In the cross-sectional view of Fig. 2 about middle valve body and lower valve body, the inside of middle valve body 16 and lower valve body 15 is respectively arranged with convex platform 60 and lower bulge 61.
At middle valve body 16 inner seal sleeves upper piston 17 is housed, described thimble 20 is positioned at center, upper piston 17 upper end.The upper end of upper piston 17 arranges flanging, is connected by spring 18 between this flanging and the described convex platform 60; The outside, lower end at upper piston 17 is set with valve seat 40, and the upper and lower end of valve seat 40 is respectively arranged with valve 41 and lower valve 37.As can be seen from Figure 2, valve seat 40 is the internal and external casing structure, and its inner sleeve coupling is sleeved on the valve outside, and the middle part of its outer tube and inner sleeve is connected to form upper and lower circular groove; Described upper and lower valve is respectively the internal and external casing structure, and the bottom of the internal and external casing of upper valve and lower valve is connected to form circular groove; The annular groove wall of upper and lower valve is tightly connected with the upper and lower annular groove wall of valve seat respectively, and spring 42 is arranged in the annular groove of valve and valve seat, and spring 39 is arranged in the annular groove of lower valve and valve seat.Wherein go up valve 41 and cooperate the formation valve mechanism with convex platform 60 downsides, lower valve 37 cooperates the formation valve mechanism with lower bulge 61 upper sides.The epimere external diameter of upper piston 17 forms step greater than the hypomere external diameter, and this step is positioned near the convex platform 61 or a little more than convex platform 61, and the step surface of described step cooperates formation valve drive configuration with upper valve 41.Side at upper valve body 16 is disposed with air gate 55 and induction opening 54 from top to bottom, and wherein admission port 54 is positioned at convex platform 60 downsides, and air extractor duct 55 is positioned at convex platform 60 upsides.When thimble 20 driving upper pistons 17 move downward, the step surface of upper piston 17 contacts and drives upper valve 41 with upper valve 41 and moves downward, upper valve 41 is in open mode, and this moment, admission port 54 was communicated with air extractor duct 55, carries out brake thereby drive brake gear.
At lower valve body 15 inner seal sleeves a piston bush 10 is housed, this piston bush 10 is positioned at the downside of lower bulge 61, these piston bush 10 interior middle piston 14 and lower pistons 8 of being set with simultaneously, and wherein middle piston 14 is positioned at the outside, lower piston 8 upper ends.Under normal circumstances, the alignment of the upper end of middle piston 14 and lower piston 8, wherein lower piston 8 upper ends are corresponding with the lower end of upper piston 16, and middle piston 14 upper ends are corresponding with lower valve 37.Be provided with the hollow channel that is connected in the upper and lower piston, the lower end of lower piston 8 is exhausr port 58.
The middle part of lower piston 8 is provided with outward flange 63, and the inwall middle part of piston bush 10 is provided with inward flange 62, and described outward flange 63 is positioned at inward flange 62 downsides.
The upper and lower end of piston bush 10 is respectively arranged with upper stop piece 13 and lower stop piece 7, and the lower end of middle piston 14 is provided with the evagination part that contacts with piston bush 10 sealings, and this evagination partly is positioned at upper stop piece 13 downsides; Lower stop piece 7 upsides of piston bush 10 are provided with an annular elastomeric spring abutment 59, are connected by spring 9 between the outward flange 63 of lower piston 8 and the annular elastomeric spring abutment 69, and the evagination part of middle piston 14 is connected by spring 12 with the inward flange 62 of piston bush 10; Wherein, the sidewall of lower piston 8 is provided with through hole 53, and this through hole 53 is positioned on the fragment position of outward flange 63 downsides and annular elastomeric spring abutment 69 upsides.
Sidewall at lower valve body 15 is disposed with control air extractor duct 57 and control admission port 56 from top to bottom, between piston bush 10 and lower valve body 15, there is the Sealed sandwich chamber, control admission port 56 is communicated with this interlayer chamber, be provided with simultaneously the through hole 65 that is communicated with between interlayer chamber and the inside and outside flange, this zone is the D air chamber.Be provided with the through hole 51 that is communicated with its inner chamber in the upper piston bottom.
Lower valve body lower end inner seal sleeve is equipped with plug 3, forms the interlayer chamber between plug 3 and the described spring chair 59, and this interlayer chamber is connected with control air extractor duct 57, and its passage 52 is positioned at the sidewall of lower valve body 15.Plug 3 hollows, its inner chamber communicates with lower piston 8 inner chambers, and the end of plug 3 is provided with noise control net 2, and noise control net 2 arranged outside have guard shield 1.Be connected by spring 5 between plug 3 and the annular elastomeric spring abutment 59.
Shown among Fig. 1 by push rod and controlled simultaneously two valve systems, the braking of driven in synchronism front-rear axle.It is long logical that through hole on the valve seat 40 is connected air pressure, enters by being located at lower valve body 15 left side passages simultaneously
EAir chamber, purpose are for balance spring 12 Hes
CAir chamber with
EThe two ends gas pressure power of air chamber.This state lower piston 8 is subject to
E9 distortion of air chamber pressure spring, piston 8 separates with piston 17, and piston 14 is subject to 12 distortion of downward pressure spring simultaneously, and lower valve 17 sealing surfaces are contracted to 1.2mm with the valve port gap that is located on the lower valve body 15.When control admission port air pressure is lower than 0.55Mpa under the equilibrium activity of spring 9 and air pressure, piston 8 returns and piston 17 combinations.Anti-malfunctioning main brake valve enters the anti-malfunctioning anxious state for the treatment of.
When system's generation brake failure or bad error, brake activation when air pressure is lower than 0.55Mpa, push rod 26 drive tip-lever support 47 and descending with relevant transmission component, eliminate piston 17 step surfaces and upper valve 41 sealing surface gaps, and namely engrave valve 41 and open,
BThe air chamber air pressure stream is to air extractor duct, artificially handle push rod 26 power with
AAir chamber counter pressure pressurized produces the main brake equilibrium air pressure in retracing spring 45 and rubber balance spring 46; Simultaneously anti-malfunctioning Function effect, by linkage units such as piston 17 pushing pistons 8, spring 9, spring 5, circlip 7, piston bush 10, spring 12, circlip 13, pistons 14, lower valve 37 is closed, the control air extractor duct
57Pneumatic pipe cleaner is crossed piston 8 interior aperture noise suppression networks 2 and is entered the anti-malfunctioning braking of dying of atmosphere generation, at once (anti-malfunctioning lock torque=anti-dead spring thrust+main brake air pressure 0.55Mpa to 0Mpa application force).Remove 26 push rod power, the main brake linkage unit returns in order, and upper valve 41 is closed, and air extractor duct 55 Pneumatic pipe cleaners are crossed piston 17, piston 8 interior aperture noise suppression networks enter atmosphere and brake simultaneously releasing; Main brake releasing simultaneously anti-malfunctioning linkage unit is returned in order, and lower valve 37 is opened, and controls give vent to anger 57 mouthfuls and the braking of source of the gas connection releasing spring energy-storage.
Claims (7)
1. prevent malfunctioning main brake valve for one kind, comprise the upper valve body that is tightly connected successively, middle valve body and lower valve body from top to bottom, it is characterized in that: be set with valve seat in the upper valve body, the top, lower end of valve seat is connected with the central movable of a lateral balance lever or docks, and the two ends of this horizontal parallel bar contact with the thimble of two symmetries respectively; Perhaps top, the lower end of valve seat directly contacts with a thimble;
The inside of middle valve body and lower valve body is respectively arranged with convex platform and lower bulge;
At middle valve body inner seal sleeve upper piston is housed, described thimble is positioned at center, upper piston upper end; The upper end of upper piston arranges flanging, is connected by spring between this flanging and the described convex platform; The outside, lower end at upper piston is set with valve seat, the upper and lower end of valve seat is respectively arranged with valve and lower valve, upper and lower valve respectively with valve seat between sealing contact and be connected by spring, wherein go up valve and cooperate the formation valve mechanism with the convex platform downside, lower valve cooperates the formation valve mechanism with the lower bulge upper side; The epimere external diameter of upper piston forms step greater than the hypomere external diameter, and this step is positioned near the convex platform or a little more than convex platform, and the step surface of described step cooperates formation valve drive configuration with upper valve; Side at upper valve body is disposed with air gate and induction opening from top to bottom, and wherein admission port is positioned at the convex platform downside, and air extractor duct is positioned at the convex platform upside; Be provided with the through hole that is communicated with its inner chamber in the upper piston bottom;
At lower valve body inner seal sleeve piston bush is housed, at the piston bush inner seal sleeve lower piston is housed, the upper end sealing shroud is equipped with middle piston in piston head, and wherein lower piston is arranged in the piston inboard; Be provided with the hollow channel that is connected in the upper and lower piston; The middle part of lower piston is provided with outward flange, and the inwall middle part of piston bush is provided with inward flange, and described outward flange is positioned at the inward flange downside; The upper end of described middle piston contacts with described lower valve;
The upper and lower end of piston bush is respectively arranged with upper and lower catch, and the lower end of middle piston is provided with the evagination part that contacts with the piston bush sealing, and this evagination partly is positioned at the upper stop piece downside; The lower stop piece upside of piston bush is provided with an annular elastomeric spring abutment, is connected by spring between the outward flange of lower piston and the annular elastomeric spring abutment, and the evagination part of middle piston is connected by spring with the inward flange of piston bush;
Be disposed with from top to bottom control air extractor duct and control admission port at lower body wall, have the Sealed sandwich chamber between piston bush and lower valve body, the control admission port is communicated with this interlayer chamber, is provided with simultaneously the through hole that is communicated with between interlayer chamber and the inside and outside flange;
Lower valve body lower end inner seal sleeve is equipped with plug, forms the interlayer chamber between plug and the described spring chair, and this interlayer chamber is connected with the control air extractor duct, and its passage is positioned at lower body wall.
2. anti-malfunctioning main brake valve according to claim 1 is characterized in that: described plug hollow, and its inner chamber communicates with the lower piston inner chamber, and the end of plug is provided with the noise control net.
3. anti-malfunctioning main brake valve according to claim 1 is characterized in that: be connected by spring between described plug and the annular elastomeric spring abutment.
4. anti-malfunctioning main brake valve according to claim 1, it is characterized in that: described valve seat is with base plate, and base plate center band is fluted, and groove one side arranges deflation hole; Valve seat upper end inner seal is set with tip-lever support, is connected with retracing spring between tip-lever support circumferential edges and the valve seat base plate; Center, tip-lever support lower end is with valve rod, and this valve rod coupling is inserted in the described bottom plate groove; Center, tip-lever support upper end is provided with the push rod groove, and the push rod groove is used for installing push rod; Be tightly connected between tip-lever support upper end and the upper valve body.
5. anti-malfunctioning main brake valve according to claim 1, it is characterized in that: be provided with spherical groove on the top, lower end of valve seat, the lateral balance lever upper center is provided with spherical groove, and Matching installation has steel ball in two grooves.
6. anti-malfunctioning main brake valve according to claim 1 is characterized in that: be positioned on one section lower piston sidewall of described outward flange downside and annular elastomeric spring abutment upside, be provided with through hole.
7. anti-malfunctioning main brake valve according to claim 1, it is characterized in that: described valve seat is the internal and external casing structure, and its inner sleeve coupling is sleeved on the valve outside, and the middle part of its outer tube and inner sleeve is connected to form upper and lower circular groove; Described upper and lower valve is respectively the internal and external casing structure, and the bottom of the internal and external casing of upper valve and lower valve is connected to form circular groove; The annular groove wall of upper and lower valve is tightly connected with the upper and lower annular groove wall of valve seat respectively, and described spring is positioned at circular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474093 CN202847680U (en) | 2012-09-18 | 2012-09-18 | Malfunction prevention braking main valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474093 CN202847680U (en) | 2012-09-18 | 2012-09-18 | Malfunction prevention braking main valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202847680U true CN202847680U (en) | 2013-04-03 |
Family
ID=47978907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220474093 Withdrawn - After Issue CN202847680U (en) | 2012-09-18 | 2012-09-18 | Malfunction prevention braking main valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202847680U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862562A (en) * | 2012-09-18 | 2013-01-09 | 河南昌通科技有限公司 | Anti-failure brake master valve |
| CN104192122A (en) * | 2014-08-26 | 2014-12-10 | 王勤黄 | Anti-failure quadruple-control master brake valve |
-
2012
- 2012-09-18 CN CN 201220474093 patent/CN202847680U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862562A (en) * | 2012-09-18 | 2013-01-09 | 河南昌通科技有限公司 | Anti-failure brake master valve |
| CN102862562B (en) * | 2012-09-18 | 2014-12-10 | 昌通科技有限公司 | Anti-failure brake master valve |
| CN104192122A (en) * | 2014-08-26 | 2014-12-10 | 王勤黄 | Anti-failure quadruple-control master brake valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHANGTONG TECHNOLOGY CO., LTD. Free format text: FORMER NAME: HENAN CHANG TONG TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 451252 No. 9 Chaoyang West Road, Yongan street, Gongyi industrial demonstration zone, Henan, Zhengzhou Patentee after: CHANGTONG TECHNOLOGY CO., LTD. Address before: 451252 No. 9 Chaoyang West Road, Yongan street, Gongyi industrial demonstration zone, Henan, Zhengzhou Patentee before: Henan Chang Tong Technology Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130403 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |