CN208267618U - Hydraulic type hinge closing device - Google Patents
Hydraulic type hinge closing device Download PDFInfo
- Publication number
- CN208267618U CN208267618U CN201820693278.5U CN201820693278U CN208267618U CN 208267618 U CN208267618 U CN 208267618U CN 201820693278 U CN201820693278 U CN 201820693278U CN 208267618 U CN208267618 U CN 208267618U
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- piston
- rotation axis
- shell
- screw thread
- maintenance
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- 238000012423 maintenance Methods 0.000 claims description 45
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 230000014759 maintenance of location Effects 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 29
- 239000010720 hydraulic oil Substances 0.000 description 12
- 230000008859 change Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses a kind of hydraulic type hinge closing devices, including capping, groups of springs, shell, piston and rotation axis, the capping is mounted on shell, the piston is mounted in shell, and enclosure interior is divided into ante-chamber and back cavity, the piston can be in moving in shell, the rotation axis is mounted in shell, internal piston is divided into rear working chamber and preceding working chamber by the rotation axis, the inner wall of working chamber is equipped with internal screw thread after described, the side of the rotation axis is equipped with the external screw thread to match with internal screw thread, the rotation axis can be in rotating in piston, the groups of springs is located in ante-chamber, one end of the groups of springs and capping connect, the other end is connect with piston, the shell is equipped with oilhole, working chamber is connected with preceding working chamber after described, the ante-chamber and preceding working chamber, oilhole and back cavity are respectively communicated with.
Description
Technical field
The utility model relates to arrive a kind of hinge closing device, a kind of hydraulic type hinge closing device is especially related to.
Background technique
Hinge closing device, is mostly installed on door, and for realizing the hinged of door and wall, facilitates the unlatching of door with this
Or it closes.Currently, common door often relies on the force of user itself to realize when being turned on or off on the market.
And the unlatching even if being mounted with hinge closing device, due to hinge closing device common on the market, for door
Or close and influence very little, when being turned on or off, if the force of user is very big, i.e., door body is by biggish unlatching
When power or closing force, the movement speed of door body can quickly, cause the position of door that can promptly change, and not have substantially among it
There is transit time, in this way, being not only easy to damage on the door, but also the people that once stands behind the door, people behind the door is often difficult to anti-in time
It should come, be easy to accidentally injure people behind the door, safety is lower.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of hydraulic type hinge closing devices, can solve above-mentioned ask
Topic one or more.
One aspect according to the present utility model provides a kind of hydraulic type hinge closing device, including capping, spring
Group, shell, piston and rotation axis, the capping are mounted on shell, and the piston is mounted in shell, and enclosure interior is divided
It is divided into ante-chamber and back cavity, the piston can be in moving in shell, and the rotation axis is mounted in shell, and the rotation axis is by piston
Inside is divided into rear working chamber and preceding working chamber, and the inner wall of the rear working chamber is equipped with internal screw thread, the side of the rotation axis
It is equipped with the external screw thread to match with internal screw thread, the rotation axis can be in rotating in piston, and the groups of springs is located in ante-chamber, institute
The one end and capping for stating groups of springs connect, and the other end is connect with piston, and the shell is equipped with oilhole, and the rear working chamber is with before
Working chamber is connected, and the ante-chamber and preceding working chamber, oilhole and back cavity are respectively communicated with.
The beneficial effects of the utility model are: door body can be connected with rotation axis in the utility model, to make door body with rotation
The rotation of axis and rotate, and through rotation axis in rotation, since internal screw thread and external screw thread can work in coordination engagement contact, can make
It obtains piston also to move therewith, to change the volume of each cavity in shell, and hydraulic oil can be housed in each cavity, as a result,
Each cavity assists the rotation of rotation axis as changes of internal pressure can correspond to when rotation axis is rotated, and due in cavity
The flowing of hydraulic oil needs the regular hour, so that the velocity of rotation of rotation axis can be influenced by hydraulic fluid pressure always, and
Always it maintaining in a certain range, i.e. the movement speed of door body has certain limitation, and it is small to the damage of door body, and behind the door
People can also have the change of time enough reaction door position, safety is good.And the playback of door, then the realization of spring is relied on, and
And return is engaged by screw thread since rotation axis is still, resume speed and noise can be substantially reduced, moreover it is possible to improve the playback of door
When stationarity.
In some embodiments, the utility model further includes fixing seat, and the fixing seat is mounted on shell.Fixing seat
Setting can be convenient the installation and fixation of the utility model.
In some embodiments, the utility model further includes check valve, the first oil duct is equipped in the shell, before described
Chamber is connected with back cavity by the first oil duct, the second oil duct is equipped in the piston, the check valve is for establishing from the second oil
To the unilaterally connected of back cavity, second oil duct is connected with rear working chamber in road.Due to rotation axis can in being rotated in piston, by
This, rotation axis in the course of rotation can take the hydraulic oil of a part in rear working chamber to, pass through the second oil duct of setting and list
Can be when the hydraulic oil in rear working chamber to be excessive to valve, the hydraulic oil in rear working chamber can unilaterally be discharged to back cavity in time
In, to guarantee the normal use of the utility model.
In some embodiments, the utility model further includes folder gate seat, and the folder gate seat installation is on the rotating shaft.Press from both sides door
The setting of seat can be in order to the connection of the utility model and door body.
In some embodiments, the utility model further includes cushion block, and the cushion block is installed in folder gate seat.Cushion block can be with
The buffering of junction as the utility model and door reduces damage of the utility model to door body.
In some embodiments, the groups of springs includes limit spring and working spring, one end of the working spring
It is fixedly connected with capping, the other end is fixedly connected with the piston, and one end of the limit spring is fixedly connected with the piston, and the other end is
Free end simultaneously faces capping.As a result, when piston motion is excessive, limit spring meeting and closure contacts prevent piston with this
Continue to move, the damage of anti-locking mechanism guarantees the functional reliability of piston.
In some embodiments, the internal screw thread includes upper internal screw thread and lower internal screw thread, the upper internal screw thread and lower interior
The position of screw thread is opposite, and the upper internal screw thread and lower internal screw thread match with external screw thread.Pair of upper internal screw thread and lower internal screw thread
The unlatching that can correspond to two inward-outward directions of door should be set, more can be suitably used for the conventional of door on the market and use.
In some embodiments, the utility model further includes maintenance door closer, and the maintenance door closer includes maintenance envelope
Plate, maintenance groups of springs, retention housing, maintenance rotation axis, cam, steel ball and steel ball seat, the maintenance sealing plate are mounted on maintenance shell
On body, the steel ball seat is mounted in retention housing, and can be in moving in retention housing, and the steel ball is mounted on steel ball seat,
The steel ball matches with cam, and the maintenance rotation axis is installed in retention housing, and the cam is installed on maintenance rotation axis
On, the steel ball is in contact with cam, and one end of the maintenance groups of springs is connect with maintenance sealing plate, and the other end is connected with steel ball seat
It connects.The utility model is by setting maintenance door closer, so that when the utility model is used, the position that can be opened on the door carries out
Maintenance realizes that door is maintained at the state of 90 ° of openings using maintenance door closer, this is practical as a result, after 90 ° of door up time needle open
The novel use for adapting to various situations, improves the wide usage of the utility model.
In some embodiments, the maintenance door closer includes retention clip gate seat, and the retention clip gate seat is mounted on solid
In the rotation axis of position.Retention clip gate seat can facilitate the connection of maintenance door closer and door body.
In some embodiments, the steel ball on cam stroke and rotation axis match in the stroke in piston.
Thus, it is possible to avoid insufficient or excessive in the stroke in piston due to rotation axis, cause steel ball in the exercise lack on cam
Or excessively, so that maintenance door closer can not effectively work, or damage that is excessive and causing maintenance door closer is shifted.
In some embodiments, the cam is equipped with recess, and the recess matches with steel ball.The setting of recess,
Can be convenient steel ball it is mobile in place when be stuck in recess, even if can still be maintained with this when not exerting a force steel ball on cam
Position, to realize that door maintains certain opening angle.
Detailed description of the invention
Fig. 1 is a kind of usage state diagram of the hydraulic type hinge closing device of embodiment of the utility model.
Fig. 2 is the cross-sectional view of the front view of the hydraulic type hinge closing device in Fig. 1.
Fig. 3 is the top view of the section B-B of the hydraulic type hinge closing device in Fig. 2.
Fig. 4 is the cross-sectional view of the top view of the hydraulic type hinge closing device in Fig. 1.
Fig. 5 is the usage state diagram of the hydraulic type hinge closing device of the another embodiment of the utility model.
Fig. 6 is the cross-sectional view of the front view of the maintenance door closer in Fig. 1.
Fig. 7 is the cross-sectional view of the top view of the maintenance door closer in Fig. 1.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
Embodiment 1
With reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, present embodiment discloses a kind of hydraulic type hinge closing device, including capping 1,
Groups of springs 2, shell 3, piston 4, rotation axis 5, fixing seat 6, check valve 7, folder gate seat 8 and cushion block 9.
Capping 1 is equipped with extension end, and extension end is extend into shell 3, and is stuck in shell 3, so that capping 1 is fixedly mounted
On shell 3, and shell 3 and the link position of capping 1 are additionally provided with sealing ring, so as to improve the sealed reliable of shell 3 and capping 1
Property.
Piston 4 is inlaid in shell 3, and piston 4 can also translate in shell 3, and piston 4 and shell 3 are in close contact, so that
The inside of shell 3 is divided into ante-chamber 31 and back cavity 32 by piston 4.The first oil duct 30 is equipped in shell 3, ante-chamber 31 and back cavity 32 are logical
It crosses the first oil duct 30 to be connected, the second oil duct 40 is equipped in piston 4, check valve 7 is mounted in the second oil duct 40, and check valve 7 is used
In unilaterally connected of the establishment from the second oil duct 40 to back cavity 32.
The middle part of rotation axis 5 is mounted in piston 4, and the both ends of rotation axis 5 pass through bearing and are mounted in shell 3,
And two tops of rotation axis 5 are pierced by from shell 3, the middle part of rotation axis 5 is located in piston 4, and the part of rotation axis 5
The inside of piston 4 is divided into rear working chamber 41 and preceding working chamber 42, rotation axis 5 can also rotate in piston 4, rear working chamber 41
It is connected between preceding working chamber 42 by oil duct, and the bottom of piston 4 is equipped with runner, preceding working chamber 42 also passes through the piston 4
Runner is connected with ante-chamber 31, and the second oil duct 40 is connected with rear working chamber 41.
The inner wall of working chamber 41 is equipped with internal screw thread 411 afterwards, and the side for the part being located in piston 4 in rotation axis 5
It is equipped with external screw thread 51, internal screw thread 411 includes upper internal screw thread 4111 and lower internal screw thread 4112, upper internal screw thread 4111 and lower internal screw thread
4112 position is opposite, and the shape and position of upper internal screw thread 4111 and lower internal screw thread 4112 with the shape of external screw thread 51 and position
It sets and matches, so that external screw thread 51 and upper internal screw thread 4111, lower internal screw thread 4112 can engage.
Groups of springs 2 is composed of limit spring 21 and working spring 22, and groups of springs 2 is located in the ante-chamber 31 of shell 3, bullet
One end of working spring 22 in spring group 21 is fixedly connected with capping, and the other end is fixedly connected with piston 4, and limit spring 21 its
One end piston 4 is fixedly connected, and the other end is free end and face capping 1, when the mobile stroke of piston 4 is more than expected, limit
The free end of spring 21 can be contacted with capping 1, prevent piston 4 from continuing to move to this, guarantee the functional reliability of piston 4.
Fixing seat 6 is mounted by means of bolts on shell 3, and the capping 1 after installation is located in fixing seat 6, and solid
Reservation 6 with capping 1 while it is concordant, in order to its install.Gate seat 8 is pressed from both sides, presss from both sides gate seat 8 by being fixedly mounted on rotation axis
5 from the both ends that shell 3 stretches out, and cushion block 9 is installed in folder gate seat 8.
In order to facilitate the connection of oil supply system, shell 3 is equipped with oilhole 421, and ante-chamber 31 is connected with oilhole 421, so that
External oil supply system can be connected by oilhole 421 with ante-chamber 31.
The utility model setting when, folder gate seat 8 can be mounted in door body by bolt, and cushion block 9 can positioned at door body with
The contact portion of gate seat 8 is pressed from both sides, in this, as buffering, fixing seat 6 can be mounted by means of bolts on wall, and the oil on shell 3
Hole 421 can be connect with oil supply system by oil pipe, finally, ante-chamber 31, back cavity 32, preceding working chamber 42 in the utility model and after
Working chamber 41 can be full of by hydraulic oil, and ante-chamber 31 can realize oil inlet and oil return with oil supply system.In addition, in order to improve this
The use reliability and stability of utility model, are symmetrically installed two the utility model in door body, another setting and above-mentioned
Set-up mode is identical.
When the utility model is used, attempting to open door when user exerts a force, rotation axis 5 is pushed to rotate, it is outer in rotation axis 5
Internal screw thread 411 in the corresponding piston 4 of 51 energy of screw thread is meshed, and when so that rotation axis 5 rotating, will drive the retrogressing of piston 4,
The volume of working chamber 41 reduces after then, and preceding working chamber 42 increases, and 31 volume of ante-chamber reduces, and the volume of back cavity 32 increases, hydraulic oil
The chamber flowing that can increase from a reduced volume of chamber toward volume, since hydraulic oil has certain flowing velocity, so that rotation axis 5 exists
It can be always by certain damping, to ensure that speed when opening is maintained within a certain range, so that door body when rotation
The changed transition effect in position it is good, improve the safety and stability opened.
And when user does not exert a force on the door, compressed groups of springs 2 releives and pushes the mobile realization return of piston 4, and lives
Plug 4 is while mobile, since the internal screw thread 411 in the corresponding piston 4 of 51 energy of external screw thread in rotation axis 5 is meshed,
So that the returning movement of piston 4 also will drive the rotation of rotation axis 5, so that rotation axis 5 also realizes return, and during return, after
The volume of working chamber 41 increases, and preceding working chamber 42 reduces, and 31 volume of ante-chamber increases, and the volume of back cavity 32 reduces, and hydraulic oil can be from
The chamber flowing that a reduced volume of chamber increases toward volume, since hydraulic oil has certain flowing velocity, thus the mobile meeting of piston 4
Always by certain damping, to ensure that a seating velocity is maintained within a certain range, the safety closed is improved
And stability.
In addition, during the opening and closing of above-mentioned door, in each cavity if there is hydraulic shortage of oil or mistake
The case where amount, can realize supplement or oil return by oil supply system.
Embodiment 2
With reference to Fig. 2-Fig. 7, present embodiment discloses a kind of hydraulic type hinge closing devices, in addition to having in embodiment 1
All structures, and the connection mounting means of each structure is also in the same manner as in Example 1, and the hydraulic type hinge in the present embodiment closes
Door gear further includes maintenance door closer 10, and maintenance door closer 10 includes maintenance sealing plate 101, maintenance groups of springs 102, retention housing
103, maintenance rotation axis 104, cam 105, steel ball 106, steel ball seat 107 and retention clip gate seat 108.
Maintenance sealing plate 101 is mounted by means of bolts on retention housing 103, and steel ball seat 107 is installed on retention housing 103
It is interior, and can be moved in retention housing 103, a part of steel ball 106 is flush-mounted on steel ball seat 107, and can be on steel ball seat 107
Rotation.
The both ends of maintenance rotation axis 104 pass through bearing respectively and are installed in retention housing 103, enable rotation axis 104 in
Rotation in retention housing 103, and two tops of maintenance rotation axis 104 are stretched out from the two sides of retention housing 103 respectively, cam
105 are fixedly installed in maintenance rotation axis 104 by detent, the size of size and position and steel ball 106 that cam 105 is arranged and
Position matches, and cam 105 and steel ball 106 are in contact, and enables steel ball 106 around the peripherally pivoted of cam 105, and cam
Recess 1051 is additionally provided on 105, the size of recess 1051 and the size of steel ball 106 match, so that steel ball 106 can be embedded in recess
On 1051, recess 1051 can be set to the angle of any needs, and recess 1051 is set to steel ball when door opens in 90 ° in the present embodiment
106 on 105 position of cam, realizes steel ball 106 in the stopping on cam 105, in addition, steel ball 106 is in the stroke on cam 105
Match with rotation axis 5 in the stroke in piston 4, thus when rotation axis 5 reaches the terminal in piston 4, steel ball 106 can also be arrived
Terminal up on cam 105, to guarantee the use reliability and stability of the two.
One end of maintenance groups of springs 102 is fixedly connected with maintenance sealing plate 101, and the other end is fixedly connected with steel ball seat 107.Gu
Position folder gate seat 108 is then mounted by means of bolts in maintenance rotation axis 104.
In setting, pressing from both sides gate seat 8 and retention clip gate seat 108 can be mounted in door body the utility model by bolt, and
It presss from both sides gate seat 8 and retention clip gate seat 108 is symmetrical arranged.Fixing seat 6 and maintenance sealing plate 101 can be mounted by means of bolts on wall
On, and the oilhole 421 on shell 3 can be connect by oil pipe with oil supply system, and finally, ante-chamber 31, back cavity in the utility model
32, preceding working chamber 42 and rear working chamber 41 can be full of by hydraulic oil, and ante-chamber 31 can by oil supply system realize oil inlet and
Oil return.
When the utility model is used, attempting to open door when user exerts a force, then rotation axis 5 is pushed, when rotation axis 5 rotates
Band piston 4 retreats, then the volume of rear working chamber 41 reduces, and preceding working chamber 42 increases, and 31 volume of ante-chamber reduces, the appearance of back cavity 32
Product increases, and the chamber flowing that hydraulic oil can increase from a reduced volume of chamber toward volume, to ensure that speed when opening is tieed up
It holds in a certain range, groups of springs 2 is in compressive state at this time.Meanwhile maintenance rotation axis 104 also can Forced rotation so that convex
Wheel 105 also rotates with it, and when door is opened to 90 °, then steel ball 106 can be on the recess 1051 of cam 105, at this point, i.e.
User is set no longer to exert a force, since cam 105 is stuck, door can still maintain the state of 90 ° of openings.
When it is required to close the door, user then exert a force make steel ball 106 be detached from cam 105 on recess 1051, meanwhile, compressed
Groups of springs 2 releive and push piston 4 is mobile to realize return, 4 return of piston also drives 5 return of rotation axis, when door returns to original position
When, i.e., piston 4 and rotation axis 5 return to original position, and thus steel ball 106 has also been returned in the original position that cam 105 contacts, with this reality
The closing of existing door.
The above is only a kind of embodiments of the utility model, it is noted that comes for those of ordinary skill in the art
It says, without departing from the concept of the present invention, various modifications and improvements can be made, these belong to this reality
With novel protection scope.
Claims (10)
1. hydraulic type hinge closing device, which is characterized in that including capping, groups of springs, shell, piston and rotation axis, the envelope
Lid is mounted on shell, and the piston is mounted in shell, and enclosure interior is divided into ante-chamber and back cavity, and the piston can be in
It is moved in shell, the rotation axis is mounted in shell, and internal piston is divided into rear working chamber and preceding work by the rotation axis
Chamber, the inner wall of the rear working chamber are equipped with internal screw thread, and the side of the rotation axis is equipped with the outer spiral shell to match with internal screw thread
Line, the rotation axis can be in rotating in piston, and the groups of springs is located in ante-chamber, and one end of the groups of springs and capping connect,
The other end is connect with piston, and the shell is equipped with oilhole, and the rear working chamber is connected with preceding working chamber, and the ante-chamber is with before
Working chamber, oilhole and back cavity are respectively communicated with.
2. hydraulic type hinge closing device according to claim 1, which is characterized in that including fixing seat, the fixing seat
It is mounted on shell.
3. hydraulic type hinge closing device according to claim 1, which is characterized in that including check valve, in the shell
Equipped with the first oil duct, the ante-chamber is connected with back cavity by the first oil duct, and the second oil duct is equipped in the piston, described unidirectional
Valve is connected for establishing the unilaterally connected from the second oil duct to back cavity, second oil duct with rear working chamber.
4. hydraulic type hinge closing device according to claim 1, which is characterized in that including pressing from both sides gate seat, the folder gate seat
Installation is on the rotating shaft.
5. hydraulic type hinge closing device according to claim 1, which is characterized in that the groups of springs includes limit spring
And working spring, one end of the working spring are fixedly connected with capping, the other end is fixedly connected with the piston, the limit spring
One end be fixedly connected with the piston, the other end is free end and to face capping.
6. hydraulic type hinge closing device according to claim 1, which is characterized in that the internal screw thread includes upper internal screw thread
With lower internal screw thread, the position of the upper internal screw thread and lower internal screw thread is opposite, and the upper internal screw thread and lower internal screw thread are and external screw thread
Match.
7. hydraulic type hinge closing device according to claim 1, which is characterized in that described solid including maintenance door closer
Position door closer includes maintenance sealing plate, maintenance groups of springs, retention housing, maintenance rotation axis, cam, steel ball and steel ball seat, described solid
Position sealing plate is mounted on retention housing, and the steel ball seat is mounted in retention housing, and can be in moving in retention housing, the steel
Pearl is mounted on steel ball seat, and the steel ball matches with cam, and the maintenance rotation axis is installed in retention housing, the cam
It is installed in maintenance rotation axis, the steel ball is in contact with cam, and one end of the maintenance groups of springs is connect with maintenance sealing plate, separately
One end is connected with steel ball seat.
8. hydraulic type hinge closing device according to claim 7, which is characterized in that the maintenance door closer includes maintenance
Gate seat is pressed from both sides, the retention clip gate seat is mounted in maintenance rotation axis.
9. hydraulic type hinge closing device according to claim 7, which is characterized in that the steel ball is in the stroke on cam
Match with rotation axis in the stroke in piston.
10. hydraulic type hinge closing device according to claim 7, which is characterized in that the cam is equipped with recess, institute
Recess is stated to match with steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820693278.5U CN208267618U (en) | 2018-05-10 | 2018-05-10 | Hydraulic type hinge closing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820693278.5U CN208267618U (en) | 2018-05-10 | 2018-05-10 | Hydraulic type hinge closing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208267618U true CN208267618U (en) | 2018-12-21 |
Family
ID=64681550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820693278.5U Active CN208267618U (en) | 2018-05-10 | 2018-05-10 | Hydraulic type hinge closing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208267618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108505864A (en) * | 2018-05-10 | 2018-09-07 | 东莞力督门控设备有限公司 | Hydraulic type hinge closing device |
-
2018
- 2018-05-10 CN CN201820693278.5U patent/CN208267618U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108505864A (en) * | 2018-05-10 | 2018-09-07 | 东莞力督门控设备有限公司 | Hydraulic type hinge closing device |
| CN108505864B (en) * | 2018-05-10 | 2024-01-23 | 东莞力督门控设备有限公司 | Hydraulic hinge door closing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 523000 Building 1, No.16, bangao Village Road, Wanjiang street, Dongguan City, Guangdong Province Patentee after: DONGGUAN DORINT DOOR CONTROL Co.,Ltd. Country or region after: China Address before: 523061 Xinhe Village, Wanjiang District, Dongguan City, Guangdong Province Patentee before: DONGGUAN DORINT DOOR CONTROL Co.,Ltd. Country or region before: China |