CN1310417C - Controller for motor driving unit - Google Patents
Controller for motor driving unit Download PDFInfo
- Publication number
- CN1310417C CN1310417C CNB031003850A CN03100385A CN1310417C CN 1310417 C CN1310417 C CN 1310417C CN B031003850 A CNB031003850 A CN B031003850A CN 03100385 A CN03100385 A CN 03100385A CN 1310417 C CN1310417 C CN 1310417C
- Authority
- CN
- China
- Prior art keywords
- motor
- controller
- cycle
- predetermined period
- breaking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000284 extract Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 21
- 230000002045 lasting effect Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 206010040007 Sense of oppression Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Control Of Direct Current Motors (AREA)
Abstract
The present invention relates to a controller (12) used for a motor driving device (10) comprising a motor which responds to a load and then extracts current from a power supply (14) to lead forward rotation. The controller (12) can be conveniently coupled to the device (10) and can also be connected to the motor to detect a motor parameter indicating the load value. When the motor parameter value exceeds the first predetermined value and the first predetermined time, current is made to generate on and off pulses with the first predetermined period frequency, wherein each 'on' period in the predetermined period frequency has enough duration time to allow the motor to extract enough current to respond to the load and also has enough duration time to maintain enough current to make the motor forwards rotate normally.
Description
Technical field
The present invention relates to motor driver, such as hand-held or portable electric power tool and electric food processor, they can be the screwdrivers that electric motor drives, drilling machine, blender, mixer, grinding machine etc.Particularly, the present invention relates to control these methods of installing the load that is detected with response and controller and the motor driver of implementing this method.
Background technology
The electric motor drive unit comprises the load current that power source-responsive produces usually, and the motor that guides motor to rotate forward.Usually load mainly is made of the external loading assembly.When the operating electrical machines drive unit, motor may run into unpredictable big external loading assembly, and it may cause the motor stall.In addition, heavy load also can derive unpredictable big electric current from power supply, is using under the situation of the limited DC source storage battery of battery pack for example, if electric energy is allowed to discharge freely without limits or use control strategy, storage battery can exhaust than faster.In addition, motor also may produce unpredictable big voltage or big wattage responds big load and under overload or overvoltage or analogue the continued operation motor, this may cause motor to be burnt or shorten the working life of motor.
Detect and the whole bag of tricks of these overloads of appropriate responsive or stall or conditions of similarity in the past patent US 4,249,117, US 4,267,914, and US 4,306, are illustrated in 264 and EP0,808,011.The various parameters of electric machine are such as electric current, and the rate of change of voltage even calorific value or these parameters all can be detected.And then, the power supply supply that is connected on this motor can temporarily disconnect, at EP 0,808, disclosed a kind of method in 011, it comprises that making motor produce multiple pulses transmits a series of torque pulse, has the peak torque much larger than average torque in the pulse train of this transmission, the purpose of this method is to overcome the stall condition by giving bigger torque, and it mainly is applicable to and exchanges electrically driven (operated) motor.
Summary of the invention
Therefore target of the present invention provides another kind of method and responds overload or stall or conditions of similarity.
According to an aspect of the present invention, provide a kind of method to control motor driver, this motor driver has the responsive load of being used for and extracts the motor that the electric current guiding is rotated forward from power supply.This method comprises how to detect the parameter of electric machine such as wattage, voltage, or the parameter of indication such as electric current load numerical value, and make electric current produce electric current " logical (on) " " disconnected (off) " pulse during first scheduled time with the first predetermined period frequency when parameter of electric machine value surpasses first predetermined value, wherein each in the first predetermined period frequency " lead to " cycle and preferably had enough duration and allow the enough electric currents of motor generation to respond this load.
According to another aspect of the present invention, provide a kind of controller to control motor driver, this motor driver has the responsive load of being used for and extracts the motor that the electric current guiding is rotated forward from power supply.This controller can be advantageously connected to motor and detect the parameter of electric machine such as wattage, voltage, or the parameter of indication such as electric current load numerical value, this controller also further is suitable for making electric current produce the pulse that " leading to " " break " with the first predetermined period frequency during first scheduled time when parameter of electric machine value surpasses first predetermined value, and wherein each in the first predetermined period frequency " led to " cycle and preferably had enough duration and allow the enough electric currents of motor generation to respond this load.
In one embodiment, each in the predetermined period frequency " led to " cycle all has enough duration to keep enough electric currents to make to motor normally to rotate forward.In addition, the cycle of " breaking " of each in the predetermined period frequency all has enough duration to allow motor thoroughly to discharge from the state that rotates forward.
In fact, electric current produces " leading to " " breaking " pulse according to first predetermined lasting time, and perhaps electric current is under the pulse that " leading to " " break " always and is manually cut away the electric energy of supplying with motor up to electric current.
According to a further aspect in the invention, it provides a kind of controller to control motor driver, and it comprises that motor comes responsive load and extracts electric current from power supply and produce forward rotation with responsive load.This controller can be advantageously connected to motor and detect the parameter of electric machine such as wattage, voltage, or the parameter of indication such as electric current load numerical value, this controller also further is suitable for motor is discharged from rotate forward and guiding motor second scheduled time of backward rotation when parameter of electric machine value surpasses second predetermined value.
For convenience, the parameter of electric machine can be the wattage or the magnitude of voltage of load consumption, or the electric current that is extracted by load.
When power supply is limited DC source, this invention will provide more advantage.
Description of drawings
With reference to the accompanying drawings, the present invention will only more specifically be described by example:
Fig. 1 is a simplified block diagram of having described an embodiment of controller of the present invention.
Fig. 2 is a flow chart of having described the preferred embodiments of the present invention.
When Fig. 3 is the motor normal running of having described not with controller of the present invention is the chart of the current of electric of the function of time.
When Fig. 4 is the motor normal running of having described with controller of the present invention is the chart of the current of electric of the function of time.
Embodiment
Describe the present invention below, and with reference to the electric motor drive unit, it can be that hand or portable electric screw driver or electric drill that they have motor, this motor extracts electric current and comes responsive load and generation rotation forward from power supply.
With reference to figure 1, intelligent controller 12 is provided as the independent annex of motor driver 10.Thereby controller 12 is coupled to motor driver 10 and is connected to motor (not shown) in the motor driver.Motor driver 10 is coupled to independently voltage source or power supply 14 by controller 12.With this kind method, motor extracts electric current and comes responsive load guiding motor to rotate forward from voltage source 14.In fact, the form of controller can be the assembly or the part of motor driver.Controller can provide on the motor or console switch at motor driver on provide, perhaps separately and power supply together, such as appending on the battery pack.
In the normal running of motor driver, motor continuously rotates forward, by receiving wattage feedback from motor, and controller cycle ground or detect the value that the parameter of electric machine is indicated load continuously.The parameter of electric machine also can be the electric current that the motor responsive load is produced, or the simple voltage landing of adopting through motor.After parameter of electric machine value surpasses threshold value or predetermined value and continues the preset time section, controller will receive the wattage feedback, and the output motor control signal makes motor enter the operator scheme of improvement to motor.
Under the operator scheme of improving, motor is controlled according to the present invention.In first aspect, controller 12 can make electric current produce " lead to " pulse of " breaking " according to the predetermined period frequency, and wherein each " leads to " cycle should have enough duration to allow the enough electric currents of motor extraction with responsive load.This controller is particularly useful for electric screw driver (screwdriver).
Such as, as an example, when the motor-driven screw, the load that motor runs into becomes tight along with screw and is difficult to rotation and increases, and this speed that also causes motor to rotate forward slows down.The increase of load will cause wattage to feed back to controller.Controller provides suitable pulse operation to screwdriver, makes it " lead to " further trip bolt of cycle at each.In addition, because enough allowing electric current to reach its normal operating value, each duration of " lead to " cycle selection comes responsive load, and disconnect or the cut-out electric current in each cycle of " breaking ", so generally speaking the operation to motor does not have tangible or any significant negative effect.
" lead to " energy resource consumption that " breaking " cycle can save voltage source, especially to battery, battery pack, or limited DC power supply.The controlled improvement operation of motor allows battery to use more permanent and not be used in waste electric energy when operating under the high load condition.In one embodiment, period frequency be from 0.1 second by 13 seconds, for electric hand tool, preferably be set between 0.3 second and 1 second.
More specifically, each duration of " leading to " cycle ideally has enough duration to make it normally to rotate forward to keep enough current of electric, promptly keeps normal motor operation electric current in suitable operation time period.Pulse operation can set in advance keeping predetermined lasting time, or selects as another kind of, thereby pulse operation lasts till that always controller or electric current are cut off supply of electrical energy to motor by hand off.
Individual other, in other hand-held or portable electric tool, making each cycle of " break " that enough duration be arranged is suitable to allow motor thoroughly to discharge from rotation forward; Longer normal running interruption of current promptly should be arranged, and motor can discharge load and restarts when each " breaks " end cycle " breaking " in the cycle like this.Restarting of motor may produce " (kick-start) takeoffs " effect.
In the second aspect of improving operation, it is particularly suitable for electric drill or electric saw, and electric current is interrupted to discharge the rotation forward of motor, and controller further guides the motor backward rotation and continued for second scheduled time.When electric drill or electric saw clamped or when locking, motor will run into unpredictable heavy load and stall between the material that institute bores or saws.Under such deadlock condition, preferably adopt with normal operation or operate opposite direction of motor rotation forward, load just has been released like this, and this electric tool just can not be clamped or locked.
Similar with first aspect, the second aspect of improving operation also provides extra benefit to the occasion of the power supply that adopts limited DC source.In addition, except the electric energy of conserve batteries, " leading to " " break " pulse operation and reverse operating directly discharges the relevant load of motor, and eliminates the oppression state of motor, therefore can keep and correctly protects motor, increases its working life.
In multi-functional electric tools, can implement first and second aspects that the present invention improves operation.In fact, pulse manipulated threshold value is less than the threshold value of reverse operating.
With reference to figure 2,, electric energy is applied to the target motor driver with initialization operation in step 52 in step 51 beginning.Detect the indicated value of the load that the parameter of electric machine runs into as the motor in the motor driver at step 53 initialization controller.In normal running, motor is continual to rotate forward.When the parameter of electric machine satisfies or reaches predetermined value, such as detecting torque in step 56, motor just enters the specific operator scheme of improving in step 58, and it can be pulse operation or reverse operating, and this depends on the parameter of electric machine value that is detected, and to have surpassed first still be second predetermined toque value.Improving operation will stop oneself after step 59 is through first or second preset time, perhaps select the power supply of this device of hand off as another.
Described method can be applied to described controller, perhaps is applied to comprise the motor driver of described motor and controller.Preferably, the console switch of motor driver can comprise described controller.In addition, described controller preferably includes the operation that integrated circuit or processor are controlled motor.
In addition, the present invention can also use with other controller, and apart from speed control, as GB 2,314,980 specifications are described and disclosed such as hand electric, and the latter is combined fully therewith as a reference.
With reference to figure 3 and Fig. 4, these figure describe the operation of electric hand drill.Fig. 3 illustrates the electric drill operation that does not have improvement of the present invention, and Fig. 4 shows pulse operation of the present invention.The current of electric of these two figure demonstrations is as the function of time, and the load that current of electric and motor run into is proportional fully.
In the normal start-up course of rotating forward of motor operation, need the fast rise of electric current.Along with the continuation of drilling operation, load increase and electric current begins to occur little peak value or rising.When electric drill met with obstruction, load (and electric current) significantly increase met and exceeded threshold value.When electric drill operation was finished, electric current began to reduce, and along with the operation trigger switch of this device is released and eliminates electric current from motor.
Comparison diagram 3 and Fig. 4, in the time of during electric current meets and exceeds the some overcurrent of threshold value, motor enters pulse operation or pulse forward direction and rotates, and electric current is applied in predetermined " lead to " and " breaks " period frequency up to eliminating electric current by the release trigger switch from motor.
In Fig. 4, when operating in the rotation of pulse forward direction, during " break period frequency " in predetermined " leading to " each " led to " cycle, electric current is still kept normal operating current value, and motor just can " lead to " cycle at each and do not produce any significant negative effect with normal power and torque operation like this.
Described the present invention can also be used to protect and burn-down of electric motor or overheated relevant problem, owing to enlarged the scope of application of electric tool or prolonged service time of electric tool.The detected parameter of electric machine will be the temperature that motor coil produces.
Scope of the present invention will more clearly be defined in the claim of the present invention.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (33)
1. the controller that is used for motor driver, described motor driver has motor, described motor is used for responsive load and extracts electric current from power supply and rotate with the guiding forward direction, described controller is suitable for being connected to described motor, and the parameter of electric machine of the described load numerical value of detection indication, described controller also is further adapted for when described parameter of electric machine value and surpasses first predetermined value during first scheduled time, make electric current produce the pulse of " leading to " and " breaking " with the first predetermined period frequency, wherein, each in the described first predetermined period frequency " led to " cycle and had enough duration and allow described motor to extract enough electric currents in response to described load.
2. controller according to claim 1, wherein each in the first predetermined period frequency " led to " cycle has enough duration to keep enough electric currents to make motor produce normal forward direction to rotate.
3. controller according to claim 1, wherein the cycle of " breaking " of each in the first predetermined period frequency has enough duration that motor is thoroughly discharged from forward direction rotates.
4. controller according to claim 1, wherein " to lead to " scope in cycle or each cycle of " breaking " be from 0.1 second to 13 seconds to each in the first predetermined period frequency.
5. controller according to claim 1, wherein " to lead to " scope in cycle or each cycle of " breaking " be from 0.3 second to 1 second to each in the first predetermined period frequency.
6. according to arbitrary described controller in the claim 1 to 5, wherein said power supply is limited DC source.
7. controller according to claim 1, wherein said controller make electric current produce " leading to " and " breaking " pulse of first predetermined lasting time.
8. controller according to claim 1, wherein said controller make electric current produce " leading to " and " breaking " pulse, are manually reset up to described controller and cut off the electric energy that is supplied to motor.
9. controller according to claim 1, wherein said motor can backward rotation, and surpass second predetermined value during second scheduled time when described parameter of electric machine value, described controller can make described motor discharge from described forward direction rotates and the guiding motor carries out described backward rotation, and described second predetermined value is greater than described first predetermined value.
10. controller according to claim 8, wherein said controller guiding motor backward rotation second predetermined lasting time.
11. controller according to claim 8, wherein said controller guiding motor backward rotation is manually reset the electric energy that cut-out is supplied to motor up to described controller.
12. controller according to claim 8, wherein said power supply are limited DC source.
13. motor driver comprises:
Motor in response to load, extracts electric current from power supply and rotates forward with guiding;
And
Controller, be connected to this motor, be used to detect the parameter of electric machine of indication load numerical value, make electric current produce " leading to " and " breaking " pulse with the first predetermined period frequency during first scheduled time when described parameter of electric machine value surpasses first predetermined value, each in the first predetermined period frequency " led to " cycle and had enough duration and allow motor in response to the enough electric currents of described load extraction.
14. motor driver according to claim 13, wherein each in first predetermined period frequency " led to " cycle has enough duration to keep enough electric currents to make motor produce normal forward direction to rotate.
15. motor driver according to claim 13, wherein the cycle of " breaking " of each in the first predetermined period frequency has enough duration that motor is thoroughly discharged from forward direction rotates.
16. controller according to claim 13, wherein " to lead to " scope in cycle or each cycle of " breaking " be from 0.1 second to 13 seconds to each in the first predetermined period frequency.
17. controller according to claim 13, wherein " to lead to " scope in cycle or each cycle of " breaking " be from 0.3 second to 1 second to each in the first predetermined period frequency.
18. controller according to claim 13, wherein said motor can backward rotation, and surpass second predetermined value during second scheduled time when described parameter of electric machine value, described controller can make motor discharge from described forward direction rotates, and guiding motor to carry out described backward rotation, described second predetermined value is greater than described first predetermined value.
19., also comprise battery as power supply according to arbitrary described motor driver in the claim 13 to 18.
Be used for responsive load and extract the motor that electric current rotates forward with guiding from power supply 20. the method for control motor driver, described motor driver comprise, described method comprises: the parameter of electric machine that detects indication load numerical value; And
Make electric current produce " leading to " and " breaking " pulse with the first predetermined period frequency during first scheduled time when described parameter of electric machine value surpasses first predetermined value, each in the first predetermined period frequency " led to " cycle and had enough duration and allow motor in response to the enough electric currents of described load extraction.
21. method according to claim 20, wherein each in the first predetermined period frequency " led to " cycle has enough duration to keep enough electric currents to make motor produce normal forward direction to rotate.
22. method according to claim 20, wherein the cycle of " breaking " of each in the first predetermined period frequency has enough duration that motor is thoroughly discharged from forward direction rotates.
23. method according to claim 20, wherein " to lead to " scope in cycle or each cycle of " breaking " be from 0.1 second to 13 seconds to each in the first predetermined period frequency.
24. method according to claim 20, wherein each in the first predetermined period frequency " led to " duration in cycle or each cycle of " breaking " from 0.3 second to 1 second.
25. method according to claim 20, wherein said electric current produce " leading to " and " breaking " pulse of first predetermined lasting time.
26. method according to claim 20, wherein electric current produces the described motor of sever supply is manually reset in " leading to " and " breaking " pulse up to electric current electric energy.
27. according to arbitrary described method in the claim 20 to 26, wherein said electric energy is supplied with by limited DC source.
28. method according to claim 20, further comprise when described parameter of electric machine value and surpass second predetermined value during second scheduled time, described motor is discharged and the guiding motor carries out described backward rotation from described forward direction rotates, described second predetermined value is greater than described first predetermined value.
29. method according to claim 28, described motor are directed backward rotation second predetermined lasting time.
30. method according to claim 28, wherein said motor is directed backward rotation, is manually reset the electric energy of the described motor of sever supply up to electric current.
31. be used for the console switch of hand-held or portable motor driver, described switch includes each described controller in the claim 1 to 5.
32. be used for the console switch of hand-held or portable motor driver, described switch includes the described controller of claim 6.
33. be used for the console switch of hand-held or portable motor driver, described switch includes each described controller in the claim 7 to 12.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/052,235 | 2002-01-16 | ||
| US10/052,235 US20030132725A1 (en) | 2002-01-16 | 2002-01-16 | Controller for motor driven device |
| GB0209863.0 | 2002-04-30 | ||
| GB0209863A GB2384374B (en) | 2002-01-16 | 2002-04-30 | Controller for motor driven device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1433138A CN1433138A (en) | 2003-07-30 |
| CN1310417C true CN1310417C (en) | 2007-04-11 |
Family
ID=27665374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031003850A Expired - Lifetime CN1310417C (en) | 2002-01-16 | 2003-01-16 | Controller for motor driving unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1310417C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004045068B4 (en) * | 2003-11-28 | 2022-09-01 | Smc K.K. | Control device for electric actuators |
| KR20140131314A (en) * | 2011-09-06 | 2014-11-12 | 프랭클린 컨트롤 시스템즈, 아이엔씨. | Motor protection and control apparatus, system, and/or method |
| CN112303860B (en) * | 2019-07-24 | 2022-01-21 | 青岛海尔空调器有限总公司 | Air deflector control method and air conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2040680U (en) * | 1988-09-24 | 1989-07-05 | 沈阳电力机械厂 | Electromagnetic speed adjusting electric machinery controller |
| CN1084103A (en) * | 1992-09-15 | 1994-03-23 | 吴玉山 | The control of shredder and operation indicator device thereof |
| US5483141A (en) * | 1992-12-03 | 1996-01-09 | Kabushiki Kaisha Toshiba | Method and apparatus for controlling refrigerator cycle |
| CN2469835Y (en) * | 2001-02-06 | 2002-01-09 | 彬腾企业股份有限公司 | Motor driving device for electric curtain |
-
2003
- 2003-01-16 CN CNB031003850A patent/CN1310417C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2040680U (en) * | 1988-09-24 | 1989-07-05 | 沈阳电力机械厂 | Electromagnetic speed adjusting electric machinery controller |
| CN1084103A (en) * | 1992-09-15 | 1994-03-23 | 吴玉山 | The control of shredder and operation indicator device thereof |
| US5483141A (en) * | 1992-12-03 | 1996-01-09 | Kabushiki Kaisha Toshiba | Method and apparatus for controlling refrigerator cycle |
| CN2469835Y (en) * | 2001-02-06 | 2002-01-09 | 彬腾企业股份有限公司 | Motor driving device for electric curtain |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1433138A (en) | 2003-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2979817B1 (en) | Power tool | |
| EP3840211B1 (en) | Electric tool | |
| JP6024446B2 (en) | Impact tools | |
| US7795829B2 (en) | Electric power tool and method for operating same | |
| EP2617528A2 (en) | Rotary tool | |
| CN112140066B (en) | Electric tool | |
| US20200246954A1 (en) | Electric tool | |
| EP2027974A3 (en) | Electric power tool, control unit and program | |
| EP3226404A1 (en) | Electric tool control circuit | |
| US11533841B2 (en) | Electric working machine and method for controlling motor of electric working machine | |
| CN107912127B (en) | Working machine | |
| US20040050566A1 (en) | Motor-driven rotary tool with internal heating temperature detecting function | |
| JP4370819B2 (en) | Electric tool switch and electric tool using the switch | |
| GB2436959A (en) | Electric machine tool and method for operating the latter | |
| CN1310417C (en) | Controller for motor driving unit | |
| WO2024046498A1 (en) | Electric tool and control method | |
| CN104795795A (en) | Electric tool | |
| US20030132725A1 (en) | Controller for motor driven device | |
| CN2702778Y (en) | Controller for automatic breaking paper machine | |
| CN107508504B (en) | Control circuit, signal transmission control method and motor with control circuit | |
| WO2023243361A1 (en) | Work machine | |
| TWM643945U (en) | Electric tool | |
| CN113814943B (en) | Electric tool and electric tool control method | |
| JP2004330347A (en) | Electro-hydraulic pressing tool | |
| CN117895860A (en) | Electric tool and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: DEFENG PARTS CO., LTD. Free format text: FORMER OWNER: DEFENG INDUSTRIAL CO., LTD. Effective date: 20031203 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20031203 Applicant after: Defeng Parts Co.,Ltd. Applicant before: Defond Manufacturing Ltd. |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190308 Address after: Chai Wan, Hongkong, China Co-patentee after: DEFOND ELECTECH Co.,Ltd. Patentee after: Defeng Parts Co.,Ltd. Address before: Hongkong, China Patentee before: Defeng Parts Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070411 |