CN103122955A - Magnetic fluid brake drum - Google Patents

Magnetic fluid brake drum Download PDF

Info

Publication number
CN103122955A
CN103122955A CN2013100235939A CN201310023593A CN103122955A CN 103122955 A CN103122955 A CN 103122955A CN 2013100235939 A CN2013100235939 A CN 2013100235939A CN 201310023593 A CN201310023593 A CN 201310023593A CN 103122955 A CN103122955 A CN 103122955A
Authority
CN
China
Prior art keywords
brake
pad
magnetic fluid
fluid
shell
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.)
Pending
Application number
CN2013100235939A
Other languages
Chinese (zh)
Inventor
郑运婷
Original Assignee
郑运婷
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 郑运婷 filed Critical 郑运婷
Priority to CN2013100235939A priority Critical patent/CN103122955A/en
Publication of CN103122955A publication Critical patent/CN103122955A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D49/00Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like
    • F16D49/16Brakes with two brake-blocks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D63/00Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
    • F16D63/002Brakes with direct electrical or electro-magnetic actuation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/14Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/78Features relating to cooling
    • F16D2065/782Features relating to cooling the brake-actuating fluid being used as a coolant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/78Features relating to cooling
    • F16D2065/783Features relating to cooling cooling control or adjustment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00Type of actuator operation force
    • F16D2121/18Electric or magnetic
    • F16D2121/20Electric or magnetic using electromagnets

Abstract

Disclosed is a magnetic fluid brake drum. The magnetic fluid brake drum comprises a shell, a brake disc, a rotating shaft, brake claws, a brake power cushion, magnetic fluid, brake fluid, an electromagnetic coil and a controller. The magnetic field of the electromagnetic coil is controlled by the controller; ratios of the magnetic fluid inside the brake power cushion are controlled through the magnetic field; the brake power cushion is control to move through change of gravity of the magnetic fluid; a brake block and the brake disc are driven to conduct friction brake through movement of the brake power cushion; and temperatures of the brake block and the brake disc are reduced through the brake fluid to prolong service life of the brake block and the brake disc.

Description

The magnetic fluid brake drum
Technical field
The present invention relates to a kind of braking device, particularly a kind of magnetic fluid brake drum.
Background technique
The braking device of existing Motor Vehicle and some equipment, during brake, utilize oil gear driving brake block and brake disc surface friction drag to brake, the impact force of brake is larger, the temperature of brake block and brake disc friction is higher, brake block easily weares and teares, and has affected the working life of brake block and brake disc.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the magnetic fluid brake drum that provides a kind of Motor Vehicle and equipment to use, utilize controller to control the magnetic field of electromagnetic coil, utilize magnetic field to control the proportion of magnetic fluid, utilize the gravity of magnetic fluid to drive brake block and brake disc friction brake, utilize brake fluid to reduce the temperature of brake block and brake disc.
The technical solution adopted in the present invention is: the magnetic fluid brake drum includes shell, brake disc, rotatingshaft, brake pad, brake power pad, magnetic fluid, brake fluid, electromagnetic coil and controller; Brake disc is fixedly connected with rotatingshaft, and rotatingshaft is connected movingly with the bearing of shell, and brake disc is sealed in the braking die cavity of shell, is provided with brake fluid in the braking die cavity; Brake pad is positioned at the top of brake disc, the brake block of brake pad is positioned at the opposite of brake disc braking surface, and brake pad and shell are hinged, and brake pad is provided with spring and is connected with shell, utilize the elastic force of spring to hold brake pad, make the brake block of brake pad leave the braking surface of brake disc; Brake power pad is positioned at the top of brake pad, be sealed with magnetic fluid in brake power pad, electromagnetic coil is located at the outside of brake power pad, the magnetic line of force of electromagnetic coil is through magnetic fluid, controller is provided with guide line and is connected with electromagnetic coil, the proportion of brake power pad makes brake power pad be suspended in the top of brake pad less than the proportion of brake fluid.
During use, shell is fixedly connected with the frame of Motor Vehicle or equipment, and rotatingshaft is fixedly connected with the rotating shaft that needs braking; During braking, utilize controller to connect the power supply of electromagnetic coil, electromagnetic coil produces magnetic field, the magnetic field magnetic fluid magnetization in the power pad of braking, the magnetic intensity of utilizing controller to control electromagnetic coil constantly increases, the proportion of magnetic fluid is constantly increased, make the proportion of brake power pad greater than the proportion of brake fluid, make the proportion of brake power pad greater than the proportion of brake fluid, the elastic force that makes brake power pad overcome spring promotes the brake block of brake pad to lower swing, make brake block and brake disc friction, utilize brake block and brake disc frictional force to hinder brake disc and rotate; When brake is removed, controller cuts off the power supply of electromagnetic coil, the magnetic field of electromagnetic coil disappears, in brake power pad, the proportion of magnetic fluid returns to original unmagnetized state, the gravity of brake power pad is padded on less than brake power the buoyancy that brake-fluid is subject to, brake pad resets at the elastic force effect lower swing of spring, and the brake block of brake pad leaves brake disc, and brake is removed; Utilize controller to control the magnetic field of electromagnetic coil, utilize magnetic field to control the proportion of magnetic fluid, utilize the proportion of the specific gravity control brake power pad of magnetic fluid, utilize the GRAVITY CONTROL brake power pad of brake power pad to move down, utilize brake power pad to move down and promote the brake pad brake, utilize controller to control brake; Shell is provided with radiating fin, the temperature of low brake block and brake disc friction.
The invention has the beneficial effects as follows: the magnetic fluid brake drum includes shell, brake disc, rotatingshaft, brake pad, brake power pad, magnetic fluid, brake fluid, electromagnetic coil and controller; Utilize controller to control the magnetic field of electromagnetic coil, utilize magnetic field to control the proportion of magnetic fluid in brake power pad, utilizing the variation of the gravity of magnetic fluid to control brake power pad moves, utilize brake power pad to move to drive brake block and brake disc friction brake, utilize brake fluid to reduce the temperature of brake block and brake disc, improve the working life of brake block and brake disc.
Description of drawings
Fig. 1 is the structural representation of magnetic fluid brake drum;
Fig. 2 is the left view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed:
The structural representation of magnetic fluid brake drum shown in Figure 1 and the left view of Fig. 1 shown in Figure 2, magnetic fluid brake drum include shell 1, brake disc 2, rotatingshaft 3, brake pad 4, brake power pad 5, magnetic fluid 6, brake fluid 7, electromagnetic coil 8 and controller 9; Brake disc 2 is fixedly connected with rotatingshaft 3, and the axis of rotatingshaft 3 is identical with the axis of brake disc 2, and rotatingshaft 3 is connected movingly with shell 1, and brake disc 2 is sealed in the braking die cavity 10 of shell 1, is provided with brake fluid 7 in braking die cavity 10; Brake pad 4 is positioned at the top of brake disc 2, the brake block 11 of brake pad 4 is positioned at the opposite of brake disc 2 braking surfaces 12, brake pad 4 is hinged with shell 1, brake pad 4 is provided with spring 13 and is connected with shell 1, spring 13 is extension spring, and spring 13 1 ends are connected with the interior connecting ring 16 of shell 1, and spring 13 the other ends are connected with the outer connecting ring 17 of brake pad 4, utilize the elastic force of spring 13 to hold brake pad 4, make the brake block 11 of brake pad 4 leave the braking surface 12 of brake disc 2; Brake power pad 5 is positioned at the top of brake pad 4, be sealed with magnetic fluid 6 in brake power pad 5, electromagnetic coil 8 is located at the outside of brake power pad 5, the magnetic line of force of electromagnetic coil 8 is through magnetic fluid 6, controller 9 is provided with guide line and is connected with electromagnetic coil 8, and the proportion of brake power pad 5 is less than the proportion of brake fluid 7.Be provided with seal ring 22 between the bearing support 21 of rotatingshaft 3 and shell 1, be used for reducing brake fluid 7 and reveal.
For the proportion that makes brake power pad 5 proportion less than brake fluid 7, brake power pad 5 is made of rubber sealant 14 and foam layer 15, foam layer 15 is sealed in rubber sealant 14, magnetic fluid 6 is sealed in foam layer 15, brake fluid 7 is water, perhaps, brake fluid is the emulsified liquid of water, and the proportion of brake power pad 5 is less than the proportion of the emulsified liquid of water or water; The excursion of magnetic fluid 6 proportions is 1.2 gram per centimeters 3To 20 gram per centimeters 3The excursion of the proportion of brake power pad 5 is 0.9 gram per centimeter 3To 19 gram per centimeters 3
In order to make the symmetrical brake of brake pad 4, brake pad 4 comprises by left brake pad 18 and right brake pad 19, is provided with positioning gap 20 between left brake pad 18 and right brake pad 19, and brake power pad 5 is provided with positioning boss 21, and positioning boss 21 is positioned at the position of positioning gap 20.
In order to improve the radiating efficiency of brake, brake fluid 7 is full of braking die cavity 10, utilizes brake fluid 7 to reduce brake block 11 and brake disc 2 friction temperatures; Shell 1 is provided with radiating fin 23, brake block 11 is delivered to shell 1 with the fricative heat of brake disc 2 through brake fluid 7, and heat is distributed by shell 1 again, improves the effect of heat radiation, reduce the temperature of brake block 11 and brake disc 2 frictions, the working life of improving brake block 11 and brake disc 2.
The non-braking state of magnetic fluid brake drum is: brake power pad 5 is subject to the buoyancy that brake fluid 7 makes progress, and the brake block 11 of brake pad 4 is gapped with the braking surface 12 of brake disc 2.The braking state of magnetic fluid brake drum is: the magnetic fluid 6 of brake power pad 5 is by the magnetic field magnetisation of electromagnetic coil 8, the proportion of brake power pad 5 increases, the downward gravity of brake power pad 5 is subject to buoyancy upwards greater than brake power pad 5 in brake fluid 7, the brake block 11 of brake pad 4 and the 12 contact friction brakes of the braking surface of brake disc 2.
For reduce ferromagnetic material to electromagnetic coil 8 magnetic fields interference, shell 1, brake disc 2, brake pad 4 and brake power pad 5 are the nonferromagnetic material formation, shell 1 and brake disc 2 are made of aluminum alloy, brake pad 4 is made of aluminum alloy and ceramic abrasive.In order to make brake power pad 5 be positioned at the top of brake pad 4, the braking die cavity 10 of shell 1 is provided with restraining groove 24, and brake power pad 5 is actively tied in restraining groove 24, makes brake power pad 5 in the interior rising of restraining groove 24 or decline.

Claims (10)

1. magnetic fluid brake drum is characterized in that: described magnetic fluid brake drum includes shell (1), brake disc (2), rotatingshaft (3), brake pad (4), brake power pad (5), magnetic fluid (6), brake fluid (7), electromagnetic coil (8) and controller (9); Brake disc (2) is fixedly connected with rotatingshaft (3), the axis of rotatingshaft (3) is identical with the axis of brake disc (2), rotatingshaft (3) is connected movingly with shell (1), brake disc (2) is sealed in the braking die cavity (10) of shell (1), is provided with brake fluid (7) in braking die cavity (10); Brake pad (4) is positioned at the top of brake disc (2), the brake block (11) of brake pad (4) is positioned at the opposite of brake disc (2) braking surface (12), brake pad (4) is hinged with shell (1), brake pad (4) is provided with spring (13) and is connected with shell (1), utilize the elastic force of spring (13) to hold brake pad (4), make the brake block (11) of brake pad (4) leave the braking surface (12) of brake disc (2); Brake power pad (5) is positioned at the top of brake pad (4), be sealed with magnetic fluid (6) in brake power pad (5), electromagnetic coil (8) is located at the outside of brake power pad (5), the magnetic line of force of electromagnetic coil (8) is through magnetic fluid (6), and controller (9) is provided with guide line and is connected with electromagnetic coil (8).
2. magnetic fluid brake drum according to claim 1, it is characterized in that: described brake power pad (5) is made of rubber sealant (14) and foam layer (15), foam layer (15) is sealed in rubber sealant (14), magnetic fluid (6) is sealed in foam layer (15), brake fluid (7) is water, perhaps, brake fluid (7) is the emulsified liquid of water, and the proportion of brake power pad (5) is less than the proportion of the emulsified liquid of water or water.
3. magnetic fluid brake drum according to claim 1, it is characterized in that: described spring (13) is extension spring, spring (13) one ends are connected with the interior connecting ring (16) of shell (1), and spring (13) the other end is connected with the outer connecting ring (17) of brake pad (4).
4. magnetic fluid brake drum according to claim 1, it is characterized in that: described brake pad (4) comprises by left brake pad (18) and right brake pad (19), be provided with positioning gap (20) between left brake pad (18) and right brake pad (19), brake power pad (5) is provided with positioning boss (21), and positioning boss (21) is positioned at the position of positioning gap (20).
5. magnetic fluid brake drum according to claim 1, it is characterized in that: the non-braking state of described magnetic fluid brake drum is: brake power pad (5) is subject to the buoyancy that brake fluid (7) makes progress, and the brake block (11) of brake pad (4) is gapped with the braking surface (12) of brake disc (2).
6. magnetic fluid brake drum according to claim 1, it is characterized in that: the braking state of described magnetic fluid brake drum is: the magnetic fluid (6) of brake power pad (5) is by the magnetic field magnetisation of electromagnetic coil (8), the proportion of brake power pad (5) increases, the downward gravity of brake power pad (5) is subject to buoyancy upwards greater than brake power pad (5) in brake fluid (7), and the brake block (11) of brake pad (4) brakes with braking surface (12) contact friction of brake disc (2).
7. magnetic fluid brake drum according to claim 1, is characterized in that: be provided with seal ring (22) between the bearing support (21) of described rotatingshaft (3) and shell (1), be used for reducing brake fluid (7) and reveal.
8. magnetic fluid brake drum according to claim 1, it is characterized in that: described shell (1), brake disc (2), brake pad (4) and brake power pad (5) consist of for nonferromagnetic material, shell (1) and brake disc (2) are made of aluminum alloy, and brake pad (4) is made of aluminum alloy and ceramic abrasive.
9. magnetic fluid brake drum according to claim 1, it is characterized in that: described shell (1) is provided with radiating fin (23), brake block (11) is delivered to shell (1) with the fricative heat of brake disc (2) through brake fluid (7), and heat is distributed by shell (1) again.
10. magnetic fluid brake drum according to claim 1, it is characterized in that: the braking die cavity (10) of described shell (1) is provided with restraining groove (24), and brake power pad (5) is actively tied in restraining groove (24).
CN2013100235939A 2013-01-03 2013-01-03 Magnetic fluid brake drum Pending CN103122955A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013100235939A CN103122955A (en) 2013-01-03 2013-01-03 Magnetic fluid brake drum

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN2013100235939A CN103122955A (en) 2013-01-03 2013-01-03 Magnetic fluid brake drum
PCT/CN2013/091192 WO2014106448A1 (en) 2013-01-03 2013-12-31 Magnetic fluid brake drum
CN201380032770.8A CN104718395A (en) 2013-01-03 2013-12-31 Magnetic fluid brake drum

Publications (1)

Publication Number Publication Date
CN103122955A true CN103122955A (en) 2013-05-29

Family

ID=48454039

Family Applications (2)

Application Number Title Priority Date Filing Date
CN2013100235939A Pending CN103122955A (en) 2013-01-03 2013-01-03 Magnetic fluid brake drum
CN201380032770.8A Pending CN104718395A (en) 2013-01-03 2013-12-31 Magnetic fluid brake drum

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201380032770.8A Pending CN104718395A (en) 2013-01-03 2013-12-31 Magnetic fluid brake drum

Country Status (2)

Country Link
CN (2) CN103122955A (en)
WO (1) WO2014106448A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014106448A1 (en) * 2013-01-03 2014-07-10 Yang Guohui Magnetic fluid brake drum
WO2014106450A1 (en) * 2013-01-03 2014-07-10 Yang Guohui Magnetic fluid brake drum device
WO2014106454A1 (en) * 2013-01-03 2014-07-10 Yang Guohui Brake drum device
WO2014106451A1 (en) * 2013-01-03 2014-07-10 Yang Guohui Magnetic fluid buoyancy brake drum

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999022156A1 (en) * 1997-10-29 1999-05-06 Lord Corporation Magnetorheological brake with integrated flywheel
KR100455790B1 (en) * 1996-06-07 2004-12-17 스미토모덴키고교가부시키가이샤 Vibration damper
KR20060081260A (en) * 2005-01-07 2006-07-12 주식회사 태화에레마 A magnetic brake
CN102141100A (en) * 2011-03-14 2011-08-03 林智勇 Magnetic fluid brake device
CN102162497A (en) * 2011-03-14 2011-08-24 林智勇 Magnetic fluid brake device
CN203146652U (en) * 2013-01-03 2013-08-21 郑运婷 Magnetic fluid brake drum

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02127373A (en) * 1988-11-07 1990-05-16 Mitsubishi Electric Corp Drive control device
CN102261405B (en) * 2011-04-09 2013-01-09 林智勇 Magnetic fluid oil pressure disc brake device
CN102829104A (en) * 2012-08-01 2012-12-19 林智勇 Magnetic fluid drum brake
CN102817939A (en) * 2012-08-11 2012-12-12 林智勇 Magnetofluid disc brake
CN103122955A (en) * 2013-01-03 2013-05-29 郑运婷 Magnetic fluid brake drum
CN103075443B (en) * 2013-01-03 2015-05-20 郑运婷 Magnetofluid brake drum device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100455790B1 (en) * 1996-06-07 2004-12-17 스미토모덴키고교가부시키가이샤 Vibration damper
WO1999022156A1 (en) * 1997-10-29 1999-05-06 Lord Corporation Magnetorheological brake with integrated flywheel
KR20060081260A (en) * 2005-01-07 2006-07-12 주식회사 태화에레마 A magnetic brake
CN102141100A (en) * 2011-03-14 2011-08-03 林智勇 Magnetic fluid brake device
CN102162497A (en) * 2011-03-14 2011-08-24 林智勇 Magnetic fluid brake device
CN203146652U (en) * 2013-01-03 2013-08-21 郑运婷 Magnetic fluid brake drum

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014106448A1 (en) * 2013-01-03 2014-07-10 Yang Guohui Magnetic fluid brake drum
WO2014106450A1 (en) * 2013-01-03 2014-07-10 Yang Guohui Magnetic fluid brake drum device
WO2014106454A1 (en) * 2013-01-03 2014-07-10 Yang Guohui Brake drum device
WO2014106451A1 (en) * 2013-01-03 2014-07-10 Yang Guohui Magnetic fluid buoyancy brake drum

Also Published As

Publication number Publication date
CN104718395A (en) 2015-06-17
WO2014106448A1 (en) 2014-07-10

Similar Documents

Publication Publication Date Title
CN203146652U (en) Magnetic fluid brake drum
CN103075443B (en) Magnetofluid brake drum device
CN103122955A (en) Magnetic fluid brake drum
CN104508313B (en) magnetic fluid buoyancy brake drum device
CN103062253A (en) Buoyancy brake drum with magnetic fluid
CN203023340U (en) Magnetic fluid buoyancy brake drum
CN103062251B (en) Buoyancy disc brake device with magnetic fluid
CN103089855B (en) Brake drum device
CN203023346U (en) Hydromagnetic buoyancy disc brake
CN103089856B (en) Brake drum
CN104494635A (en) Single magnetic type permanent magnet track braking device
CN203962800U (en) A kind of electric brake dedicated brake
CN203146651U (en) Brake drum
CN103089862B (en) Magnetic fluid float force disk brake
CN204858862U (en) Frequency conversion brake motor's arresting gear
CN203023338U (en) Magnetic fluid floating disc brake
CN104494634A (en) Dual magnetic type permanent magnet track braking device
CN203967900U (en) A kind of new brake motor
CN103062250A (en) Floating disc brake device with magnetic fluid
CN103089861A (en) Magnetic fluid float disk brake
CN204784332U (en) Initiative heat dissipation dish device of stopping
CN205101436U (en) Flexible magnetic brake
CN204250074U (en) Double-magnetic permanent magnet track brakes device
CN204250075U (en) Single magnet type permanent magnet track brakes device
CN208257595U (en) A kind of motor applied to parking lot banister

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130529