CN101302703A - Barrel roll laundry machine wide band elastic granule damper - Google Patents
Barrel roll laundry machine wide band elastic granule damper Download PDFInfo
- Publication number
- CN101302703A CN101302703A CNA2007100521422A CN200710052142A CN101302703A CN 101302703 A CN101302703 A CN 101302703A CN A2007100521422 A CNA2007100521422 A CN A2007100521422A CN 200710052142 A CN200710052142 A CN 200710052142A CN 101302703 A CN101302703 A CN 101302703A
- Authority
- CN
- China
- Prior art keywords
- granule damper
- elastic
- laundry machine
- particle
- damper
- 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
Links
Images
Landscapes
- Vibration Prevention Devices (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
The invention relates to a broadband elastic particle damper of a rolling laundry machine, the elastic particle damper 3 is formed by combining an elastic vibration isolator 5 with a particle damper 10; the elastic particle damper 3 can be positioned between a case 8 of the rolling laundry machine and a supporting ground 40, or between an oscillating damper 15 and the case 8 of the rolling laundry machine or a tumbling cylinder 12, or can be simultaneously positioned between the case 8 of the rolling laundry machine and the supporting ground 40 as well as between the oscillating damper 15 and the case 8 of the rolling laundry machine or the tumbling cylinder 12; the particle damper 10 comprises a sealed cavity 80 and particles 100 that are padded in the cavity, and is mainly used for providing frictional damping for a vibrating system in a broadband range and inhibiting formants by utilizing the mutual frictional action between the particles.
Description
Technical field
The present invention relates to a kind of barrel roll laundry machine wide band elastic granule damper, especially will have elastic vibration isolation device and granule damper now organically combines, utilize the advantage of high elasticity and its aximal deformation value of existing elastic vibration isolation device, remedy existing high fill-ratio (more than or equal to 80%) granule damper poor flexibility and the limited shortcoming of deflection, utilize the advantage of big damping relevant in the broad frequency range of existing high fill-ratio granule damper, remedy a kind of barrel roll laundry machine wide band elastic granule damper of the too small shortcoming of existing elastic vibration isolation device damping with excitation.
Technical background
In recent years at the family expenses barrel roll laundry machine that enters into family in batches, because its energy-conservation and environmental protection requirement, more and more gentlier approach, drying speed is more and more higher, thereby world-famous puzzle has appearred: as long as even cloth does not become, especially under the large eccentricity amount in high speed drying process, barrel roll laundry machine is in the kitchen or jump away the toilet, redirect, migration, and very the person breaks water pipe and power line and dances.This problem has caused attention (Zheng Yi etc. " The study of computer simulation of vibration of washing machine process ", " " vibration, test and diagnostic ", the 21st the 3rd phase of volume, September calendar year 2001 " of scholar and manufacturers.
Though barrel roll laundry machine patent documentation (the Simple Non-regenertiveDeceleration Control of Permanent Magnetic Synchronous Motor for Vibration Controlin Drum-type Washer/Dryer that utilizes various balancing techniques is arranged, IEEJ Trans.IA, Vol.125, No.7,2005 by Yashio Tomigashi etc.; Modeling, Design and Control of a Portable Washing Machine during the Spinning Cycle, Proc.Of the 2001 IEEE/ASME Int.Conf.On Advanced Intelligent MechatronicsSystems, 8-11, July 2001, Como, Italy, pp.899-904, by Evangelos Papadopoulos and IakovosPapadimitriou, " balance theory and the applied analysis thereof of ring-type fluid balance device " of Chen Zhong and Zheng Shixiong, " vibration, test and diagnostic ", the 21st the 4th phase of volume, December calendar year 2001), but still have the technical economics bottleneck of widespread usage.And original when just little when washing loads, even cloth program may be useless, and Here it is vibrates the big reason of quantitative change when why washing small amount on the contrary.
The important function of barrel roll laundry machine foot pad in the vibration of control barrel roll laundry machine noticed in the 200410033945.X patent application of LG Electronics Inc. " washing machine of band damping ", and utilize hard block and flexible blocks to constitute the material of block copolymer as described pad pin, though at offset is 400 grams, do not providing under the highest drying speed conditions, providing the vibration-testing result; Only by hard and soft and with obviously being difficult to guarantee in the full range of speeds the especially not migration of washing machine under large eccentricity amount (as 2000 grams) and high drying rotating speed (as 1200RPM).Because its pad pin material firmly must not be soft must not, be difficult to satisfy simultaneously start drying and the vibration damping requirement of casing when resonating.
Though adopt existing vibration isolation technique can effectively avoid the resonance peak of controlling object, realize effective vibration isolation in the vibration isolation district, the transport at intrinsic peak value place is excessive, and is very dangerous during by resonant frequency.As at the intrinsic frequency place, the transport of metal spring vibration isolator is accompanied greater than 50, can only good result be arranged in the vibration isolation district greater than frequency ratio 1.414; At the intrinsic frequency place, the transport of rubber shock absorber is that 6-10 accompanies, and the transport of big damping viscoelastic material is that 3-4 accompanies; At the intrinsic frequency place, the transport of steel-wire isolator is 3 to accompany, and faces permanent deformation, fatigue fracture and breakdown problem; The static friction vibration isolator of function admirable can not have intrinsic peak, but easy slippage and instability.Obviously, existing vibration isolation technique is difficult to satisfy engineering and life application.
Utilize damping vibration damping effectively, utilize proper effect obvious; The adaptation frequency of frictional damping is wide, and especially the particle frcition damper is called as the broad band damp device, have in addition be operated in severally to several KHzs, this is that most of dampers institute is incompetent, thereby is widely used.Investigating Particle Impact Damping As a Means of FatigueReduction (9 as " steamed buns stuffed with sweetened bean paste damper " (" aviation journal ", in March, 1999), Vikram K.Kinra and the Bryan Witt of Li Wei etc.
ThJoint FAA/DoD/NASA Aging Aircraft Conference), Design Methodology for Particle Damping (the Smart Structures and Materials:Damping andIsolation Newport Beach of Bryce L.Fowler etc., CA, March 2001), " based on the inertial platform three-dimensional vibration isolator of friction energy-dissipating mechanism " (" the noise and vibration control " of the long vessel used to hold grain at the imperial sacrifice of Lee of Henan Electromechanical higher junior college, in August, 1997) and " particle damping isolator " (machinery, 1998 the 25th volume supplementary issue), Japan Patent JP2001355672 (Particle Vibration_IsolatingDamper), U.S. Pat 6260676B1 (Magnetic Particle Damper Apparatus), US6547049 (Particle Vibration Damper), US6802405B2 (Friction Vibration Damper), US2006/0180420A1 (Vibration Damper) and US20070012530 A1 (Bearing Damper Having Dispersed FrictionDamping Elements).
Wherein, " the steamed buns stuffed with sweetened bean paste damper " of Li Wei etc. though also flexible constraint, the rigidity of its elastomeric material is too little, thereby can not bear the gravity effect of controlled device or pretightning force correspondingly, and can not be used to support controlled device; Secondly, adopt the purpose of little rigidity to be, take place in the course of work of permission " steamed buns stuffed with sweetened bean paste damper " to collide between particle, implement the exchange of collision energy.This is that intergranular collision is of equal importance with friction because diffussion and energy exchange and frictional energy exchange are in the same order of magnitude; Simultaneously, in this paper, as other granule damper, " steamed buns stuffed with sweetened bean paste damper " also is to be attached on " body " of controlled object, vibrate with controlled device, thereby utilize the exchange of intergranular diffussion and energy exchange and frictional energy, be not arranged between side support and the controlled device, also do not exert pressure by side support and controlled device.
The Investigating Particle Impact Damping As a Meansof Fatigue Reduction (9 of Vikram K.Kiara and Bryan Witt
ThJoint FAA/DoD/NASA Aging Aircraft Conference) utilizes the terminal attaching particles damper of overhanging beam, in cantilever beam and attaching particles damper vibrate together, the filling rate of granule damper and the relation between the terminal immeasurable firm damped coefficient of described overhanging beam have been studied.Show raising along with filling rate, the space that particle moves mutually diminishes, almost there is not relative motion between particle when filling greater than 80%, thereby the kinetic energy of particle disappears, and does not have the exchange of intergranular collision and energy, does not almost have damping action (unless there is inhomogeneities in grain graininess), this is similar to wideband particle dynamic vibration absorber, obviously, for dynamic vibration absorber was used, intergranular collision seemed important than intergranular friction.
" based on the inertial platform three-dimensional vibration isolator of friction energy-dissipating mechanism " (" the noise and vibration control " of the long vessel used to hold grain at the imperial sacrifice of Lee of Henan Electromechanical higher junior college, in August, 1997), its action principle is to insert friction lever in the cavity of its granule damper, the mobile variation that can not cause the granule damper cavity volume of pole, pressure ring same up and down moved further under the effect of spring up and down, thereby can not push for particle wherein, described granule damper cavity can not hold the effect of supporting force comprehensively.
U.S. Pat 6260676 B1 (Magnetic Particle Damper Apparatus) implement damping action by the applied stress between magnetic field control magnetic-particle, and think that the substitute of MR damper is also superior; Do not have flexible cavity, can not be used to bear the gravity of controlled device or pretightning force correspondingly;
U.S. Pat 2006/0180420 A1 (Vibration Damper) is then under the cavity volume situation less than filling and immobilized particles damper, inflation being set in the variation by electromagnetic field, gas-filled cavity volume, the granule damper reservoir body in floating piston, the granule damper cavity volume controlling and the intergranular active force of adjustment movement, obviously also is attached to playing vibration with one on the controlled device.
U.S. Pat 6802405 B2 (Friction Vibration Damper) are provided with a shelves stream plate in the granule damper of complete filling not, suppress the damping vibration attenuation effect of granule damper.
The granule damper of Japan Patent JP2001355672 (Particle Vibration_Isolating Damper) by the cavity of granule damper, in the cavity particle, be arranged in cavity the driving floating piston all portion, be positioned at the granule damper cavity and form with the piston rod etc. that is connected of outer end; Its material that constitutes the granule damper cavity is generally rigid body, the moving up and down of rigid piston rod makes (' energydissipation due to a collision of the particle filled around the float ' that changes and bump of the intergranular extrusion stress in the granule damper cavity after the abundant filling
Draw from esp@cenetDatabase), the motion of friction piston almost can not cause the variation of granule damper cavity volume; Admit directly load-bearing in the patent, obviously have sizable extrusion stress between its inner particle under this operating mode, this helps strengthening intergranular friction energy-dissipating effect.Obviously its structure complicated is not suitable for the extensive use on mini-plant especially movable equipment.
US20070012530 A1 (Bearing Damper Having Dispersed Friction Damping Elements) then is the high temperature modification granule damper that proposes for the vibration damping of motive bearing specially, and is as follows to this patent analyses:
1) this patent is emphasized its granule damper cavity complete filling;
2) because the support stiffness of rotor-support-foundation system is very big, often can not utilize elastic vibration isolation; Its granule damper housing adopts the stainless steel metal material, in the course of the work radial-deformation very little (... that can flex somewhatin the radial direction of the bearing.---draws from this patent), its stiffness coefficient is big, should the vibration isolation requirement of the removable instrument and equipment of vibration damping again thereby can not be used for; Because vibration isolation is that its stiffness coefficient is little for the requirement of system, to reduce the intrinsic frequency of supporting, avoid driving frequency, and vibration damping is that must there be damping in system, to suppress intrinsic peak value for the requirement of system;
3) shape of this damper cavity is to be enclosed within the outer ring-shaped cavity of bearing, after filling and installing, under the effect of gravity, in inactive state one side distortion is only arranged, and in rotor rotation process, for dynamic balancing rotor-support-foundation system preferably, centrifugal force is very little, thereby be difficult to realize while compression for granule damper on other orientation, thereby make the applied stress between its internal particle very little, thereby utilize the catabiotic effect of intergranular phase mutual friction very little;
4) shape of this damper cavity is to be enclosed within the outer ring-shaped cavity of bearing, after filling and installing, under the effect of gravity, in inactive state the distortion of one side is only arranged, and in rotor rotation process, if dynamic balancing is bad, centrifugal force is very big, be analogous to quiet, the dynamic pressure support bearing is the same, centrifugal power will impel the particle whirling motion with the whirling motion of axle in the cavity, thereby be difficult to realize while compression for granule damper on other orientation, in case there is not pressure to fill, applied stress between its internal particle is little, thereby utilizes the catabiotic effect of intergranular phase mutual friction little;
5) but this patent also disclosed in described granule damper cavity and to have added the pressurising cavity, so that by extraneous fluid pressure, control the tightness degree of particle in the described granule damper cavity, thereby realize adjusting for damping, as seen, though adopt metal shell that the operating temperature of granule damper is improved, because the rigidity of metal is big, fill thereby can apply pretightning force, have to adopt the method for additive fluid cavity to solve unlike the elastic caoutchouc shells;
6) under the unidimensional prerequisite, obviously the processing and manufacturing cost height of profiled metal housing can not be used for supporting and vibration damping such as family expenses barrel roll laundry machine leg, because household electrical appliances are very responsive for cost;
7) simultaneously, because the product for civilian use is cheap for will the rectificating of service life, thereby because the fatigue strength of metal is low, the processing cost height is difficult to be applied to the engine vibration isolation and the driver's cabin vibration isolation of vehicle etc.
Can be on the basis of existing vibration isolation technique and device, does to have cheap elastic vibration isolation device and cheap granule damper now organically combine? thereby utilize the advantage of high elasticity and its aximal deformation value of existing elastic vibration isolation device, remedy existing high fill-ratio (more than or equal to 80%) granule damper poor flexibility and the limited shortcoming of deflection; Utilize the interior and positively related big damping advantage of excitation acceleration of broad frequency range of existing high fill-ratio granule damper, remedy the existing too small shortcoming of elastic vibration isolation device damping; Thereby design gravity or the pretightning force that promptly can bear between supporting and controlled device, can implement vibration isolation for described supporting and controlled device again, again can be in the frequency band of several KHzs in near-zero, the broad band damp type vibrating isolation device that suppresses one or more intrinsic peak values overcomes the deficiency of above technology.The motivation that this should invent just.
Summary of the invention
In order to achieve the above object, the present invention has disclosed a kind of barrel roll laundry machine wide band elastic granule damper, is to be composited by elastic vibration isolation device and granule damper; Described elastic granule damper can be the branch body structure, and between barrel roll laundry machine casing and supporting ground or between shock absorber and casing of washing machine or the drum or be arranged at described barrel roll laundry machine casing simultaneously and support between the ground and between described shock absorber and described casing of washing machine or the drum; Described elastic vibration isolation device comprises various rubber, plastics, compound, the various fibrous material of rubber and plastic or the above high-elastic gonosome that is mixed and made into, perhaps respectively or multiplely mix the high-elastic gonosome that back and metal composite form, it mainly acts on is to provide strain under the applied load effect, plays the purpose of regulating system intrinsic frequency; Described granule damper comprises airtight cavity and the particle that is filled in this cavity, and it mainly acts on is to utilize described intergranular mutual rubbing action, provides frictional damping to vibrational system in broad frequency range, suppresses formant; In actual the use, described elastic granule damper is arranged on the ground of serving as supporting and serves as between the casing of washing machine of controlled device, perhaps set between casing that serves as supporting and described shock absorber, perhaps be arranged on the shock absorber that serves as supporting and serve as between the washing machine drum of controlled device, utilize the gravity of controlled device or between described supporting and described controlled device, apply pretightning force, make the high elasticity body elasticity distortion of elastic vibration isolation device described in the described elastic granule damper, cause strain behind the described granule damper elastic shell pressurized, wherein intergranular contact compression increases and is in tight contact condition; Perhaps between described particle by applying contacting on the compression basis that pretightning force produces between the gravity of described controlled device or described supporting and described controlled device, apply electric field or magnetic field for the particle in the granule damper in the described broad band damp type vibrating isolation system, thereby make its compact stress and electric field or magnetic field applied stress superposition; When drum in the described barrel roll laundry machine vibrates under Eccentric Load, excitation is suspended on the outer drum in the described casing, after the one-level decay by shock absorber, encourage described casing and make barrel roll laundry machine with respect to the vibration of foundation, make and occur relative fricting movement between the particle that is in the granule damper in the described elastic granule damper under the tight contact condition, thereby on the one degree of freedom direction, consume in 0.1～5000Hz broadband range and at least the vibrational energy of described controlled device, the resonance peak that suppresses described controlled device, thereby make the suffered supporting force of described supporting keep stable, and make controlled device slippage or migration can not take place because of vibration; When described supporting is vibrated with respect to described controlled device, make and occur relative fricting movement between the particle that is in the granule damper in the described elastic granule damper under the tight contact condition, thereby on the one degree of freedom direction, consume in 0.1～5000Hz broadband range and at least the vibrational energy of described supporting, suppress the vibration of described supporting and pass to described controlled device.
Technical measures
Concrete technical measures are:
A kind of barrel roll laundry machine wide band elastic granule damper is characterized in that, described elastic granule damper 3 is to be composited by elastic vibration isolation device 5 and granule damper 10; Described elastic granule damper 3 can be the branch body structure, and between barrel roll laundry machine casing 8 and supporting ground 40 or between shock absorber 15 and casing of washing machine 8 or the drum 12 or be arranged at described barrel roll laundry machine casing 8 simultaneously and support between the ground 40 and between described shock absorber 15 and described casing of washing machine 8 or the drum 12; Described elastic vibration isolation device 5 comprises various rubber, plastics, compound, the various fibrous material of rubber and plastic or the above high-elastic gonosome that is mixed and made into, perhaps respectively or multiplely mix the high-elastic gonosome that back and metal composite form, it mainly acts on is to provide strain under the applied load effect, plays the purpose of regulating system intrinsic frequency; Described granule damper 10 comprises airtight cavity 80 and the particle 100 that is filled in this cavity, and it mainly acts on is to utilize described intergranular mutual rubbing action, provides frictional damping to vibrational system in broad frequency range, suppresses formant; The airtight cavity 80 of described granule damper 10 belongs to fully or airtight cavity 80 parts that contact described elastic vibration isolation device 5 or described granule damper 10 fully belong to or part contacts described elastic vibration isolation device 5; The airtight cavity 80 of described granule damper 10 belongs to fully or when contacting described elastic vibration isolation device 5 fully, described granule damper 10 is positioned at the body of described elastic vibration isolation device 5; Airtight cavity 80 parts of described granule damper 10 belong to or part when contacting described elastic vibration isolation device 5, and described granule damper 10 is attached to described elastic vibration isolation device 5; In actual the use, described elastic granule damper 3 is arranged on the ground 40 of serving as supporting and between the casing of washing machine 8 that serves as controlled device, perhaps described elastic granule damper 3 is arranged between the casing 8 and described shock absorber 15 that serves as supporting, perhaps described elastic granule damper 3 is arranged on the shock absorber 15 that serves as supporting and between the washing machine drum 12 that serves as controlled device, utilize the gravity of controlled device or between described supporting and described controlled device, apply pretightning force, make the high elasticity body elasticity distortion of elastic vibration isolation device 5 described in the described elastic granule damper 3, cause strain behind the described granule damper 10 elastic shell pressurizeds, wherein intergranular contact compression increases and is in tight contact condition; Perhaps between described particle by applying contacting on the compression basis that pretightning force produces between the gravity of described controlled device or described supporting and described controlled device, apply electric field or magnetic field for the particle in the granule damper in the described broad band damp type vibrating isolation system 10 100, thereby make its compact stress and electric field or magnetic field applied stress superposition; When drum in the described barrel roll laundry machine vibrates under Eccentric Load, excitation is suspended on the outer drum in the described casing, after the one-level decay by shock absorber, encourage described casing and make barrel roll laundry machine with respect to the vibration of foundation, make 100 of particles that are in the granule damper 10 in the described elastic granule damper 3 under the tight contact condition relative fricting movement occur, thereby on the one degree of freedom direction, consume in 0.1～5000Hz broadband range and at least the vibrational energy of described controlled device, the resonance peak that suppresses described controlled device, thereby make the suffered supporting force of described supporting keep stable, and make controlled device slippage or migration can not take place because of vibration; When described supporting is vibrated with respect to described controlled device, make 100 of particles that are in the granule damper 10 in the described elastic granule damper 3 under the tight contact condition relative fricting movement occur, thereby on the one degree of freedom direction, consume in 0.1～5000Hz broadband range and at least the vibrational energy of described supporting, suppress the vibration of described supporting and pass to described controlled device.
Described a kind of barrel roll laundry machine wide band elastic granule damper is characterized in that, the particle size range of described particle 100 is from 0.00001 micron to 5 millimeters.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: described particle 100 is that the monomer with certain pattern, single distribution diameter granular materials of planting are formed, as metallic particles lead, wolfram steel, steel, iron, aluminium, copper etc., as nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve, starch etc.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: the granular materials that described particle 100 is the monomer with certain pattern, multiple distribution diameter is formed, as metallic particles lead, wolfram steel, steel, iron, aluminium etc., as nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve etc.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: described particle 100 is that many bodies with certain pattern, single distribution diameter granular materials of planting are formed, as metallic particles lead, wolfram steel, steel, iron, aluminium etc. or and the mixture of nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve etc.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: described particle 100 is that the granular materials with many bodies of certain pattern, multiple distribution diameter is formed, as metallic particles lead, wolfram steel, steel, iron, aluminium etc. or and the mixture of nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve etc.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: when described particle 100 is non-metallic particles such as silica, molecular sieve, starch, can be adsorbed with liquid between described particle, cut thick rheological body or ERF thereby form, ambient pressure is strengthened its rheology damping action.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: described particle 100 is during as the magnetic conduction particle of iron powder, can be adsorbed with liquid between described particle, cut thick rheological body or magneto-rheological fluid thereby form, ambient pressure is strengthened this rheology damping action.
Beneficial effect: advantage of the present invention is: size is little, high damping, installation adaptability is strong, applicable band is wide, bearing value is strong, can significantly reduce the jump or the migration of existing barrel roll laundry machine.
Description of drawings
Figure of description is as follows:
Fig. 1 is that barrel roll laundry machine is used the schematic diagram that a kind of barrel roll laundry machine wide band elastic granule damper is implemented resonance control;
Fig. 2 is the structural representation of barrel roll laundry machine;
Fig. 3 is traditional vibration isolator leg schematic diagram of barrel roll laundry machine;
Fig. 4 is conventional particles damper " steamed buns stuffed with sweetened bean paste " schematic diagram;
Fig. 5 is with a kind of barrel roll laundry machine wide band elastic granule damper schematic diagram with traditional elastic vibration isolator and barrel roll laundry machine after conventional particles damper " steamed buns stuffed with sweetened bean paste " combines;
Fig. 6 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 1 schematic diagram;
Fig. 7 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 2 schematic diagrames;
Fig. 8 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 3 schematic diagrames;
Fig. 9 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 4 schematic diagrames;
Figure 10 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 5 schematic diagrames;
Figure 11 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 6 schematic diagrames;
Figure 12 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 7 schematic diagrames;
Figure 13 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 8 schematic diagrames;
Figure 14 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 9 schematic diagrames;
Figure 15 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 10 schematic diagrames;
Figure 16 is a kind of barrel roll laundry machine wide band elastic granule damper pad pin 11 schematic diagrames;
Figure 17 is a kind of barrel roll laundry machine wide band elastic granule damper pad schematic perspective view;
Figure 18 is a kind of barrel roll laundry machine wide band elastic granule damper pad 1 schematic diagram;
Figure 19 is a kind of barrel roll laundry machine wide band elastic granule damper pad 2 schematic diagrames;
Figure 20 is a kind of barrel roll laundry machine wide band elastic granule damper pad mounting structure 1 schematic diagram;
Figure 21 is a kind of barrel roll laundry machine wide band elastic granule damper pad mounting structure 2 schematic diagrames;
Figure 22 is that a kind of barrel roll laundry machine wide band elastic granule damper is used for shock absorber and casing or drum connection diagram.
The specific embodiment
Below with reference to Fig. 1-Figure 22 in detail a kind of barrel roll laundry machine wide band elastic granule damper is described in detail:
Fig. 1 is the diagrammatic sketch in kind of barrel roll laundry machine and this is installed invents a kind of barrel roll laundry machine of barrel roll laundry machine wide band elastic granule damper pad pin; Fig. 2 is the internal structure schematic diagram of this barrel roll laundry machine, and 12 upper end of drum is suspended on the top of casing 8 by spring 14, and its bottom is installed on the bottom of casing by shock absorber 15, two main dampers wherein, an auxiliary damper;
As Fig. 3～shown in Figure 5, a kind of barrel roll laundry machine wide band elastic granule damper is characterized in that, described elastic granule damper 3 is to be composited by elastic vibration isolation device 5 and granule damper 10;
As shown in Figure 5, described elastic granule damper 3 can be the branch body structure, and between barrel roll laundry machine casing 8 and supporting ground 40 or between shock absorber 15 and casing of washing machine 8 or the drum 12 or be arranged at described barrel roll laundry machine casing 8 simultaneously and support between the ground 40 and between described shock absorber 15 and described casing of washing machine 8 or the drum 12;
As shown in Figure 3, described elastic vibration isolation device 5 comprises various rubber, plastics, compound, the various fibrous material of rubber and plastic or the above high-elastic gonosome that is mixed and made into, perhaps respectively or multiplely mix the high-elastic gonosome that back and metal composite form, it mainly acts on is to provide strain under the applied load effect, plays the purpose of regulating system intrinsic frequency;
As shown in Figure 4, described granule damper 10 comprises airtight cavity 80 and the particle 100 that is filled in this cavity, and it mainly acts on is to utilize described intergranular mutual rubbing action, provides frictional damping to vibrational system in broad frequency range, suppresses formant;
The airtight cavity 80 of described granule damper 10 belongs to fully or airtight cavity 80 parts that contact described elastic vibration isolation device 5 or described granule damper 10 fully belong to or part contacts described elastic vibration isolation device 5;
As Fig. 7, Fig. 9～shown in Figure 22, the airtight cavity 80 of described granule damper 10 belongs to fully or when contacting described elastic vibration isolation device 5 fully, described granule damper 10 is positioned at the body of described elastic vibration isolation device 5;
As Fig. 5, Fig. 6, shown in Figure 8, airtight cavity 80 parts of described granule damper 10 belong to or part when contacting described elastic vibration isolation device 5, and described granule damper 10 is attached to described elastic vibration isolation device 5;
As Fig. 1, shown in Figure 2, in actual the use, described elastic granule damper 3 is arranged on the ground 40 of serving as supporting and between the casing of washing machine 8 that serves as controlled device, perhaps as Figure 20～shown in Figure 22, described elastic granule damper 3 is arranged between the casing 8 and described shock absorber 15 that serves as supporting, perhaps described elastic granule damper 3 is arranged on the shock absorber 15 that serves as supporting and between the washing machine drum 12 that serves as controlled device, utilize the gravity of controlled device or between described supporting and described controlled device, apply pretightning force, make the high elasticity body elasticity distortion of elastic vibration isolation device 5 described in the described elastic granule damper 3, cause strain behind the described granule damper 10 elastic shell pressurizeds, wherein intergranular contact compression increases and is in tight contact condition; Perhaps between described particle by applying contacting on the compression basis that pretightning force produces between the gravity of described controlled device or described supporting and described controlled device, apply electric field or magnetic field for the particle in the granule damper in the described broad band damp type vibrating isolation system 10 100, thereby make its compact stress and electric field or magnetic field applied stress superposition; When drum in the described barrel roll laundry machine vibrates under Eccentric Load, excitation is suspended on the outer drum in the described casing, after the one-level decay by shock absorber, encourage described casing and make barrel roll laundry machine with respect to the vibration of foundation, make 100 of particles that are in the granule damper 10 in the described elastic granule damper 3 under the tight contact condition relative fricting movement occur, thereby on the one degree of freedom direction, consume in 0.1～5000Hz broadband range and at least the vibrational energy of described controlled device, the resonance peak that suppresses described controlled device, thereby make the suffered supporting force of described supporting keep stable, and make controlled device slippage or migration can not take place because of vibration; When described supporting is vibrated with respect to described controlled device, make 100 of particles that are in the granule damper 10 in the described elastic granule damper 3 under the tight contact condition relative fricting movement occur, thereby on the one degree of freedom direction, consume in 0.1～5000Hz broadband range and at least the vibrational energy of described supporting, suppress the vibration of described supporting and pass to described controlled device.
As shown in Figure 5, the cavity 80 of the described granule damper in described a kind of barrel roll laundry machine wide band elastic granule damper is made up of the bottom surface 82 of described elastic vibration isolation device 5 and the upper side 84 of elastic shell 86 respectively, and described elastic shell 86 is made for the rubber elastomeric material;
As shown in Figure 6, the cavity 80 of the described granule damper in described a kind of barrel roll laundry machine wide band elastic granule damper is made up of the bottom surface 82 of described elastic vibration isolation device 5 and the face 84 of described supporting 40 respectively;
As shown in Figure 8, the cavity 80 of the described granule damper in described a kind of barrel roll laundry machine wide band elastic granule damper is made up of the bottom surface 82 of described elastic vibration isolation device 5 and the upper side 84 of elastic shell 86 respectively, and described elastic shell 86 is the metal material manufacturing;
As Fig. 9～shown in Figure 13, when described granule damper 10 is in the body of described elastic vibration isolation device 5 fully, can wherein be inserted particle by the axial hole (not shown) on the connecting bolt 8, seal up with screw plug then, directly enclose particle when perhaps being shaped;
As shown in figure 11, when described granule damper 10 is in the body of described elastic vibration isolation device 5 fully, can be fastening with the big end cap portions of described connecting bolt 8 with filling in the described elastic shell 86 behind the described particle, be composited with rubber etc. then;
As Fig. 9, Figure 10, Figure 14 and shown in Figure 15, when the cavity 80 of the described granule damper in described a kind of barrel roll laundry machine wide band elastic granule damper was designed to contain the structure on inclined-plane, particle wherein bore extruding and shear action simultaneously;
As Figure 14, Figure 15 and shown in Figure 16, described a kind of barrel roll laundry machine wide band elastic granule damper, the branch body structure that elastic vibration isolation device 5 wherein can be made up of first 4 and second portion 6, thus help loading described particle;
As Figure 17～shown in Figure 21, described a kind of barrel roll laundry machine wide band elastic granule damper, it is shaped as cheese;
As shown in figure 22, described a kind of barrel roll laundry machine wide band elastic granule damper is installed between damper bracket and the shock absorber;
Described a kind of barrel roll laundry machine wide band elastic granule damper is characterized in that, the particle size range of described particle 100 is from 0.00001 micron to 5 millimeters.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: described particle 100 is that the monomer with certain pattern, single distribution diameter granular materials of planting are formed, as metallic particles lead, wolfram steel, steel, iron, aluminium, copper etc., as nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve, starch etc.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: the granular materials that described particle 100 is the monomer with certain pattern, multiple distribution diameter is formed, as metallic particles lead, wolfram steel, steel, iron, aluminium etc., as nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve etc.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: described particle 100 is that many bodies with certain pattern, single distribution diameter granular materials of planting are formed, as metallic particles lead, wolfram steel, steel, iron, aluminium etc. or and the mixture of nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve etc.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: described particle 100 is that the granular materials with many bodies of certain pattern, multiple distribution diameter is formed, as metallic particles lead, wolfram steel, steel, iron, aluminium etc. or and the mixture of nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve etc.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: when described particle 100 is non-metallic particles such as silica, molecular sieve, starch, can be adsorbed with liquid between described particle, cut thick rheological body or ERF thereby form, ambient pressure is strengthened its rheology damping action.
Described a kind of barrel roll laundry machine wide band elastic granule damper, it is characterized in that: described particle 100 is during as the magnetic conduction particle of iron powder, can be adsorbed with liquid between described particle, cut thick rheological body or magneto-rheological fluid thereby form, ambient pressure is strengthened this rheology damping action.
Embodiment:
Described a kind of barrel roll laundry machine wide band elastic granule damper shown in Figure 8 is applied to certain barrel roll laundry machine, is used for substituting traditional foot pad:
1) wherein said elastic shell 86 is the metal material manufacturing, and the rigidity of described elastic vibration isolation device is about the rubber and plastic elastomeric material of 100Kgf/mm; Described particle is the irregular surface treatment iron powder of pattern; The particle size range of this iron powder is 0.0001 micron to 1 millimeter; Loading is 80%;
2) wherein said elastic shell 86 is the metal material manufacturing, and the rigidity of described elastic vibration isolation device is about the rubber and plastic elastomeric material of 200Kgf/mm; Described particle is the irregular surface treatment iron powder of pattern; The particle size range of this iron powder is 1 micron to 0.5 millimeter; Loading is 100%;
3) wherein said elastic shell 86 is the metal material manufacturing, and the rigidity of described elastic vibration isolation device is about the rubber and plastic elastomeric material of 150Kgf/mm; Described particle is the irregular surface treatment iron powder of pattern; The particle size range of this iron powder is 0.1 micron to 1 millimeter; Loading is 100%; Add electromagnetic field;
4) wherein said elastic shell 86 is the metal material manufacturing, and the rigidity of described elastic vibration isolation device is about the rubber and plastic elastomeric material of 50Kgf/mm; Described particle is the irregular surface treatment iron powder of pattern; The particle size range of this iron powder is 0.1 micron to 1 millimeter; Loading is 100%; Aircraft fluid is arranged between particle; Add electromagnetic field.
Comparing result finds that when offset was 2000 grams, the resonance peak when drying had at a high speed reduced by 50%～80%, and migration originally disappears, thereby has eliminated this barrel roll laundry machine because the migration that resonance causes.The squeezing action of gravity increases intergranular frictional force; Simultaneously, apply magnetic field, can further improve intergranular contact force, but because the leading role of gravity, contribution has about 10～20%; The interpolation of aircraft fluid is for should the effect of lowering intergranular friction being arranged with example; Thereby shown that damping is for the effective performance that suppresses formant.
Obviously, for the colleague technical staff, this invention not only is confined to structure, method and the very limited embodiment of above announcement.
Claims (8)
1, a kind of barrel roll laundry machine wide band elastic granule damper is characterized in that, described elastic granule damper (3) is to be composited by elastic vibration isolation device (5) and granule damper (10); Described elastic granule damper (3) can be the branch body structure, and is positioned between barrel roll laundry machine casing (8) and supporting ground (40) or is positioned between shock absorber (15) and casing of washing machine (8) or the drum (12) or is arranged at described barrel roll laundry machine casing (8) simultaneously and supports between the ground (40) and between described shock absorber (15) and described casing of washing machine (8) or the drum (12); Described elastic vibration isolation device (5) comprises various rubber, plastics, compound, the various fibrous material of rubber and plastic or the above high-elastic gonosome that is mixed and made into, perhaps respectively or multiplely mix the high-elastic gonosome that back and metal composite form, it mainly acts on is to provide strain under the applied load effect, plays the purpose of regulating system intrinsic frequency; Described granule damper (10) comprises airtight cavity (80) and is filled in particle (100) in this cavity, and it mainly acts on is to utilize described intergranular mutual rubbing action, provides frictional damping to vibrational system in broad frequency range, suppresses formant; The airtight cavity (80) of described granule damper (10) belongs to fully or airtight cavity (80) part that contacts described elastic vibration isolation device (5) or described granule damper (10) fully belongs to or part contacts described elastic vibration isolation device (5); The airtight cavity (80) of described granule damper (10) belongs to fully or when contacting described elastic vibration isolation device (5) fully, described granule damper (10) is positioned at the body of described elastic vibration isolation device (5); The airtight cavity (80) of described granule damper (10) part belongs to or part when contacting described elastic vibration isolation device (5), and described granule damper (10) is attached to described elastic vibration isolation device (5); In actual the use, described elastic granule damper (3) is arranged on the ground (40) of serving as supporting and between the casing of washing machine (8) that serves as controlled device, perhaps described elastic granule damper (3) is arranged between the casing (8) and described shock absorber (15) that serves as supporting, perhaps described elastic granule damper (3) is arranged on the shock absorber (15) that serves as supporting and between the washing machine drum (12) that serves as controlled device, utilize the gravity of controlled device or between described supporting and described controlled device, apply pretightning force, make the high elasticity body elasticity distortion of elastic vibration isolation device (5) described in the described elastic granule damper (3), cause strain behind described granule damper (10) the elastic shell pressurized, wherein intergranular contact compression increases and is in tight contact condition; Perhaps between described particle by applying contacting on the compression basis that pretightning force produces between the gravity of described controlled device or described supporting and described controlled device, apply electric field or magnetic field for the particle (100) in the granule damper in the described broad band damp type vibrating isolation system (10), thereby make its compact stress and electric field or magnetic field applied stress superposition; When drum in the described barrel roll laundry machine vibrates under Eccentric Load, excitation is suspended on the outer drum in the described casing, after the one-level decay by shock absorber, encourage described casing and make barrel roll laundry machine with respect to the vibration of foundation, make and occur relative fricting movement between the particle (100) that is in the granule damper (10) in the described elastic granule damper (3) under the tight contact condition, thereby on the one degree of freedom direction, consume in 0.1～5000Hz broadband range and at least the vibrational energy of described controlled device, the resonance peak that suppresses described controlled device, thereby make the suffered supporting force of described supporting keep stable, and make controlled device slippage or migration can not take place because of vibration; When described supporting is vibrated with respect to described controlled device, make and occur relative fricting movement between the particle (100) that is in the granule damper (10) in the described elastic granule damper (3) under the tight contact condition, thereby on the one degree of freedom direction, consume in 0.1～5000Hz broadband range and at least the vibrational energy of described supporting, suppress the vibration of described supporting and pass to described controlled device.
2, a kind of barrel roll laundry machine wide band elastic granule damper according to claim 1 is characterized in that, the particle size range of described particle (100) is from 0.00001 micron to 5 millimeters.
3, a kind of barrel roll laundry machine wide band elastic granule damper according to claim 1, it is characterized in that: described particle (100) is that the monomer with certain pattern, single distribution diameter granular materials of planting are formed, as metallic particles lead, wolfram steel, steel, iron, aluminium, copper etc., as nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve, starch etc.
4, a kind of barrel roll laundry machine wide band elastic granule damper according to claim 1, it is characterized in that: described particle (100) is that the granular materials of the monomer with certain pattern, multiple distribution diameter is formed, as metallic particles lead, wolfram steel, steel, iron, aluminium etc., as nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve etc.
5, a kind of barrel roll laundry machine wide band elastic granule damper according to claim 1, it is characterized in that: described particle (100) is that many bodies with certain pattern, single distribution diameter granular materials of planting are formed, as metallic particles lead, wolfram steel, steel, iron, aluminium etc. or and the mixture of nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve etc.
6, a kind of barrel roll laundry machine wide band elastic granule damper according to claim 1, it is characterized in that: described particle (100) is that the granular materials with many bodies of certain pattern, multiple distribution diameter is formed, as metallic particles lead, wolfram steel, steel, iron, aluminium etc. or and the mixture of nonmetallic materials silica, thickness sand, mica, carbon dust, diatomite, molecular sieve etc.
7, a kind of barrel roll laundry machine wide band elastic granule damper according to claim 1, it is characterized in that: when described particle (100) is non-metallic particles such as silica, molecular sieve, starch, can be adsorbed with liquid between described particle, cut thick rheological body or ERF thereby form, ambient pressure is strengthened its rheology damping action.
8, a kind of barrel roll laundry machine wide band elastic granule damper according to claim 1, it is characterized in that: described particle (100) is during as the magnetic conduction particle of iron powder, can be adsorbed with liquid between described particle, cut thick rheological body or magneto-rheological fluid thereby form, ambient pressure is strengthened this rheology damping action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100521422A CN101302703A (en) | 2007-05-10 | 2007-05-10 | Barrel roll laundry machine wide band elastic granule damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100521422A CN101302703A (en) | 2007-05-10 | 2007-05-10 | Barrel roll laundry machine wide band elastic granule damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101302703A true CN101302703A (en) | 2008-11-12 |
Family
ID=40112779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100521422A Pending CN101302703A (en) | 2007-05-10 | 2007-05-10 | Barrel roll laundry machine wide band elastic granule damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101302703A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485127A (en) * | 2013-06-25 | 2014-01-01 | 无锡小天鹅股份有限公司 | Bump leveller for washing machine and washing machine with same |
| CN105438436A (en) * | 2014-09-24 | 2016-03-30 | 湾流航空航天公司 | Aircraft and seat track assemblies for vibration isolation of floor mounted components |
| CN105671868A (en) * | 2014-11-21 | 2016-06-15 | 无锡小天鹅股份有限公司 | Balance block used for washing machine and washing machine provided therewith |
| CN108166208A (en) * | 2018-03-20 | 2018-06-15 | 江苏新安电器有限公司 | A kind of zero-g aerospace dynamical system in washer |
| CN109317706A (en) * | 2017-07-31 | 2019-02-12 | 田中金属加工（上海）有限公司 | A kind of deep hole machining damping boring cutter bar for numerically controlled lathe |
| CN109538675A (en) * | 2018-11-28 | 2019-03-29 | 南昌航空大学 | A kind of semielliptical pot box bump leveller and preparation method thereof loading iron tailings sand and haydite hybrid particles |
| CN112196939A (en) * | 2020-10-09 | 2021-01-08 | 武汉理工大学 | Cultural relic intelligent shock insulation support based on magnetorheological elastomer |
| CN113245934A (en) * | 2021-02-25 | 2021-08-13 | 李宇岗 | Glass surface treatment auxiliary assembly with prevent that glass from flying chip effect |
| US11215235B2 (en) | 2017-03-07 | 2022-01-04 | Siemens Aktiengesellschaft | Coupling element having vibration damping |
-
2007
- 2007-05-10 CN CNA2007100521422A patent/CN101302703A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485127A (en) * | 2013-06-25 | 2014-01-01 | 无锡小天鹅股份有限公司 | Bump leveller for washing machine and washing machine with same |
| CN105438436A (en) * | 2014-09-24 | 2016-03-30 | 湾流航空航天公司 | Aircraft and seat track assemblies for vibration isolation of floor mounted components |
| CN105671868A (en) * | 2014-11-21 | 2016-06-15 | 无锡小天鹅股份有限公司 | Balance block used for washing machine and washing machine provided therewith |
| CN105671868B (en) * | 2014-11-21 | 2018-04-20 | 无锡小天鹅股份有限公司 | For washing machine balance weight and there is its washing machine |
| US11215235B2 (en) | 2017-03-07 | 2022-01-04 | Siemens Aktiengesellschaft | Coupling element having vibration damping |
| CN109317706A (en) * | 2017-07-31 | 2019-02-12 | 田中金属加工（上海）有限公司 | A kind of deep hole machining damping boring cutter bar for numerically controlled lathe |
| CN108166208A (en) * | 2018-03-20 | 2018-06-15 | 江苏新安电器有限公司 | A kind of zero-g aerospace dynamical system in washer |
| CN108166208B (en) * | 2018-03-20 | 2023-04-18 | 江苏新安电器有限公司 | Zero gravity aerospace washing machine power system |
| CN109538675A (en) * | 2018-11-28 | 2019-03-29 | 南昌航空大学 | A kind of semielliptical pot box bump leveller and preparation method thereof loading iron tailings sand and haydite hybrid particles |
| CN109538675B (en) * | 2018-11-28 | 2021-05-28 | 南昌航空大学 | Semi-ellipsoidal pot vibration absorber filled with iron tailing sand and ceramsite mixed particles and preparation method thereof |
| CN112196939A (en) * | 2020-10-09 | 2021-01-08 | 武汉理工大学 | Cultural relic intelligent shock insulation support based on magnetorheological elastomer |
| CN113245934A (en) * | 2021-02-25 | 2021-08-13 | 李宇岗 | Glass surface treatment auxiliary assembly with prevent that glass from flying chip effect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101302703A (en) | Barrel roll laundry machine wide band elastic granule damper | |
| CN101303058B (en) | Broad band damp type vibrating isolation system | |
| CN1757815B (en) | Washing machine | |
| CN106930592B (en) | A kind of multidirectional compound TMD damper of ball-type | |
| CN201246436Y (en) | Large damp heavy load vibration damper | |
| CN101575882B (en) | Mixed type shape memory alloy multi-dimensional vibration isolator | |
| CN202790279U (en) | Vibration isolator of damping spring | |
| CN106936080A (en) | A kind of electrical control equipment cabinet with shock-absorbing function | |
| CN205445948U (en) | Piston compressor's vibration isolation system for oxygenerator | |
| CN203809590U (en) | Vibration attenuation mechanism | |
| CN107504125A (en) | A kind of plant equipment damping device | |
| RU2537053C2 (en) | Hydraulically damping support | |
| CN201297208Y (en) | Bearing unit with extruded oil film groove and squirrel-cage elasticity supporting structure | |
| CN108488045A (en) | Damper for blower fan pylon vibration damping | |
| CN208024759U (en) | A kind of vibration absorber of oxygenerator compressor | |
| CN206861162U (en) | A kind of damping base | |
| CN101798742A (en) | Power shock-absorbing device and washing machine provided with same | |
| CN203051611U (en) | Ball absorber | |
| CN115263992A (en) | Three-way wide-frequency large-load vibration reduction device based on frequency-adjustable vibration absorption and active vibration isolation | |
| CN209278390U (en) | A kind of vibration insulation structure and air conditioner | |
| CN205908692U (en) | Eliminate resonant damping bearing arrangement of flywheel | |
| CN101382168A (en) | Metal-rubber ring combination support high-speed rotating system for magnetic suspension bearing | |
| CN103485127A (en) | Bump leveller for washing machine and washing machine with same | |
| CN204512275U (en) | Spring damping and vibration isolating device | |
| CN207795967U (en) | A kind of vibration abatement of vertical aqua ammonia pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081112 |