US20090081060A1 - Compressor - Google Patents

Compressor Download PDF

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Publication number
US20090081060A1
US20090081060A1 US12/297,941 US29794107A US2009081060A1 US 20090081060 A1 US20090081060 A1 US 20090081060A1 US 29794107 A US29794107 A US 29794107A US 2009081060 A1 US2009081060 A1 US 2009081060A1
Authority
US
United States
Prior art keywords
suction
reed valve
valve
suction reed
hole
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.)
Abandoned
Application number
US12/297,941
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English (en)
Inventor
Kazuhiko Takai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanden Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20090081060A1 publication Critical patent/US20090081060A1/en
Assigned to SANDEN CORPORATION reassignment SANDEN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TAKAI, KAZUHIKO
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1045—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1009—Distribution members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1066—Valve plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise

Definitions

  • the present invention relates to, for example, a piston-reciprocating compressor in which a piston is provided free to reciprocate in a cylinder bore, and specifically, to a compressor suitable as a compressor used in an air conditioning system for vehicles.
  • a piston-reciprocating compressor where a plurality of cylinder bores are provided in a cylinder block and a piston is provided free to reciprocate in each cylinder bore is known.
  • a suction chamber and a discharge chamber are provided in a cylinder head, and in a suction stroke, a suction hole is opened by an operation that refrigerant gas pushes to open a suction reed valve provided in a valve plate so that the refrigerant gas in the suction chamber is sucked into the cylinder bore.
  • the suction reed valve is closed, and a discharge valve is opened by being pushed. Then, the compressed refrigerant gas is discharged from the cylinder bore into the discharge chamber.
  • the pressure in the cylinder bore is reduced down to a pressure lower than the pressure in the suction chamber, the suction reed valve is pushed toward and opened into the cylinder bore when a difference between both inner pressures is caused, and at that time, there is a fear that a pressure loss at the suction valve portion becomes great and the efficiency of the compressor (e.g. adiabatic compression efficiency or volumetric efficiency) may be reduced.
  • the efficiency of the compressor e.g. adiabatic compression efficiency or volumetric efficiency
  • a technology is proposed wherein a recessed portion smaller in width than an arm section of the suction reed valve is provided in a region of the valve plate with which the arm section is in contact, and by providing the recessed portion, while a sticking force due to the presence of lubricant oil, which causes a delay of valve opening operation, is reduced, the valve opening operation is smoothened by enlarging the pressure receiving area of the suction reed valve due to the pressure difference between the pressure in the cylinder bore and the pressure in the suction chamber (Patent document 1).
  • Patent document 1 Japanese Utility Model Laid-Open 5-89876
  • the object of the present invention is to provide a compressor which can prevent deformation etc. of a suction valve in a suction stroke, can improve the suction efficiency etc., and can suppress vibration of a suction reed valve by reducing pressure loss.
  • a compressor according to the present invention has a cylinder bore where fluid is compressed, a valve plate for partitioning the cylinder bore and a suction chamber, a suction hole provided in the valve plate and communicating the cylinder bore and the suction chamber, and a suction reed valve for opening and closing the suction hole and caused, when being closed, to be in contact with a suction reed valve seal section of the valve plate which is located outside a suction hole-provided region, and is characterized in that a suction reed valve support section, with which the suction reed valve can be in contact when the suction reed valve is closed, is provided also in the suction hole-provided region of the valve plate, a valve function is provided between an outer periphery portion of a suction reed valve contact section of the suction reed valve support section and the suction reed valve, and a through hole is provided in a part inside a portion where the valve function of
  • the suction reed valve support section is provided in the suction hole-provided region which can be in contact with the suction reed valve when the suction reed valve is closed, when the pressure in the cylinder bore increases and the suction reed valve is closed and strongly pressed onto the valve plate side in the compression step, the suction reed valve is supported by the suction reed valve support section and the suction reed valve is prevented from being deformed.
  • valve function is provided between the outer periphery portion of the suction reed valve contact section of the suction reed valve support section and the suction reed valve and the through hole is provided in the part inside the portion where the valve function of the suction reed valve is provided, refrigerant gas from the suction chamber is to be flowed into the cylinder bore passing the through hole. Further, in the embodiment provided with the through hole, substantially the same effect as that due to an enlarged suction channel can be expected, and the pressure loss at the time of suction operation can be greatly reduced.
  • a groove or a recessed portion is provided on the contact surface side of the suction reed valve support section to be in contact with the suction reed valve.
  • a problem of a delay of valve opening operation ascribed to a sticking force due to lubricant oil can be surely dissolved.
  • the above-described groove or the recessed portion is communicated with the suction chamber, because refrigerant gas in the suction chamber can be flowed into the groove or the recessed portion, a quicker and smoother valve opening operation can be ensured utilizing the pressure of the refrigerant gas flowed in.
  • the contact surface at the outer periphery portion of the suction reed valve contact section of the suction reed valve support section to be in contact with the suction reed valve is preferably located to be flush relative to the suction reed valve seal section of the suction reed valve, which is located outside the suction reed valve support section, alternatively, closer to the cylinder bore than the suction reed valve seal section, or closer to the suction chamber than the suction reed valve seal section.
  • suction reed valve support section either can be formed integrally with the valve plate, or can be formed the suction reed valve support section and the valve plate separately.
  • the position where the suction reed valve support section contacts with the suction reed valve can be adjusted by press forming after polishing of the valve plate, for example.
  • the suction reed valve support section which can be in contact with the suction reed valve when the suction reed valve is closed, is provided in the suction hole-provided region, deformation of the suction reed valve can be surely prevented.
  • the valve function is provided between the outer periphery portion of the suction reed valve contact section of the suction reed valve support section and the suction reed valve, and the through hole is provided in a part inside the portion where the valve function of the suction reed valve is provided.
  • the contact surface with the suction reed valve in the outer periphery portion of the suction reed valve contact section of the suction reed valve support section is located to be flush relative to the suction reed valve seal section of the suction reed valve, otherwise closer to the cylinder bore than the suction reed valve seal section, a part of the suction valve is lifted toward the cylinder bore side by the contact surface when the suction reed valve closes the suction hole.
  • FIG. 1 is a partial, vertical sectional view of a compressor according to an embodiment of the present invention.
  • FIG. 2 is an enlarged sectional view of a connecting section between a cylinder block and a cylinder head of the compressor depicted in FIG. 1 .
  • FIG. 3 is a diagram for explaining the position where the suction reed valve support section is provided on the valve plate in the compressor depicted in FIG. 1 .
  • FIGS. 1 to 3 show a compressor according to an embodiment of the present invention.
  • symbol 1 indicates a compressor.
  • Compressor 1 has cylinder block 2 , front housing 3 and cylinder head 4 .
  • Crank chamber 5 is formed between cylinder block 2 and front housing 3 .
  • a plurality of cylinder bores 6 are provided in the circumferential direction of cylinder block 2 .
  • Drive shaft 7 is provided in crank chamber 5 so as to extend through crank chamber 5 .
  • Rotor 8 is fixed to drive shaft 7 .
  • Rotor 8 is supported by front housing 3 via thrust bearing 9 .
  • drive shaft 7 is inserted through inclined plate 10 .
  • Inclined plate 10 is connected to rotor 8 via link mechanism 11 so that the inclination angle of inclined plate 10 can be changed by link mechanism 11 .
  • the amount in movement of piston 12 connected to inclined plate 10 in cylinder bore 6 is regulated by changing the inclination angle of inclined plate 10 , thereby changing the displacement of compressor 1 .
  • Piston 12 is provided free to be reciprocated in cylinder bore 6 .
  • Shoes 13 are held in the end portion 12 a of piston 12 located at crank chamber 5 side. Shoes 13 are in sliding contact with the surfaces of the outer periphery portion of inclined plate 10 so that rotating movement of inclined plate 10 is transformed into reciprocating movement of piston 12 by the sliding contact.
  • suction chamber 15 The inside of cylinder head 4 is partitioned to suction chamber 15 and discharge chamber 16 by wall 14 .
  • Suction port 17 for sucking refrigerant gas into suction chamber 15 is provided in suction chamber 15 .
  • Valve plate 18 is interposed between cylinder block 2 and cylinder head 4 .
  • Suction hole 19 which communicates cylinder bore 6 with suction chamber 15 and discharge hole 20 which communicates cylinder bore 6 with discharge chamber 16 are provided in valve plate 18 .
  • Suction hole 19 is opened and closed by suction reed valve 29 .
  • the opening degree of suction reed valve 29 is restricted by a condition where the tip of suction reed valve 29 is brought into contact with stopper 22 which is formed integrally with cylinder block 2 .
  • discharge hole 20 is opened and closed by discharge valve 23 which is formed as a reed valve.
  • the opening degree of discharge valve 23 is restricted by retainer 24 .
  • suction reed valve 29 When suction hole 19 is closed, suction reed valve 29 is in contact with suction reed valve seal section 26 located outside of suction hole-provided region 25 of valve plate 18 so that suction hole 19 is closed.
  • suction reed valve support section 28 which can be in contact with suction reed valve 29 when the suction reed valve is closed, is provided in suction hole-provided region 25 .
  • Contact surface 28 a to be in contact with the suction reed valve of suction reed valve support section 28 is located to be flush relative to suction reed valve seal section 26 of valve plate 18 which is located outside suction reed valve support section 28 . Where, it is also possible to dispose contact surface 28 a so as to be located closer to the suction chamber than suction reed valve seal section 26 .
  • suction reed valve support section 28 is formed integrally with valve plate 28 in this embodiment, contact surface 28 a can be located to be flush relative to suction reed valve seal section 26 or closer to the suction chamber than suction reed valve seal section 26 , for example, by performing press forming on suction reed valve support section 28 after polishing and manufacturing valve plate 18 .
  • FIG. 3(A) is a sectional view of valve plate 18 along A 1 -O 1 -B 1 line of FIG. 3(B) and FIG. 3(C) is an elevational view showing a state in which reed valve 29 is stacked on the state shown in FIG. 3(B) .
  • suction reed valve support section 28 which can be in contact with suction reed valve 29 when the suction reed valve 29 is closed is provided in suction hole-provided region 25 , suction reed valve 29 is supported by contact surface 28 a of suction reed valve support section 28 when the pressure in cylinder bore 6 is increased and suction reed valve 29 is closed and pressed strongly onto the valve plate side at the stage of compression operation, thereby preventing deformation of suction reed valve 29 etc. Further, even in a case where suction hole 19 is enlarged for the purpose of reduction of the pressure loss, deformation of the part of suction reed valve 29 corresponding to suction hole-provided region 25 can be surely prevented.
  • suction reed valve 29 is brought into contact with contact surface 28 a of suction reed valve support section 28 in the compression stroke.
  • suction reed valve 29 receives the pressure difference between cylinder bore 6 and suction chamber 15 so as to be quickly got away from contact surface 28 a , a quick and smooth valve opening operation can be ensured.
  • recessed portion 28 b is communicated with suction chamber 25 , refrigerant gas in suction chamber 15 is flowed into recessed portion 28 b so that the valve opening operation can be ensured more quickly and more smoothly.
  • suction reed valve support section 28 is formed integrally with valve plate 18 .
  • suction reed valve support section 28 has contact surface 28 a with suction reed valve 29 and recessed portion 28 b which is formed outside of it and is communicated with suction chamber 15 .
  • a valve function is provided between the outer periphery portion of contact surface 28 a with suction reed valve 29 of valve plate support section 28 and suction reed valve 29 .
  • valve function is exhibited by the contact of suction reed valve 29 with contact surface 28 a of suction reed valve support section 28 when suction reed valve 29 is closed. Further, through hole 32 is provided in a part inside the portion of suction reed valve 29 to be in contact with contact surface 28 a , in other words, inside the portion where the valve function is provided. Where, symbols 40 , 41 indicate valve seats.
  • contact surface 28 a is located to be flush relative to suction reed valve seal section 26 located outside suction reed valve supported section 28 as depicted in FIG. 3 , the sealing state with contact surface 28 a is canceled almost simultaneously with the cancelling of sealing state of suction reed valve seal section 26 . Therefore, a quick and smooth opening operation of suction reed valve 29 can be ensured. Further, contact surface 28 a with suction reed valve 29 can also be located closer to the cylinder bore than suction reed valve seal section 26 located outside suction reed valve support section 28 .
  • suction valve 29 sticks onto contact surface 28 a by lubricant oil and it causes a delay of valve opening operation can be dissolved, and a quick and smooth opening operation of suction reed valve 29 can be ensured.
  • contact surface 28 a with suction reed valve 29 so as to be located closer to the suction chamber side than suction reed valve seal section 26 located outside suction reed valve support section 28 .
  • suction reed valve support section 28 may decrease the opening area of suction hole 19 and cause an increase of the pressure loss of flow path, for such a case, the pressure loss at an entrance portion of suction hole 19 can be reduced by performing R chamfering or C chamfering at the edge around the opening portion of suction hole 19 at the side of suction chamber 15 .
  • the present invention can be broadly applied to piston-reciprocating compressors provided with pistons freely reciprocating in cylinder bores, and these compressors are suitable as compressors used in air conditioning systems for vehicles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compressor (AREA)
US12/297,941 2006-04-21 2007-04-05 Compressor Abandoned US20090081060A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2006117934 2006-04-21
JP2006117934A JP2007291881A (ja) 2006-04-21 2006-04-21 圧縮機
PCT/JP2007/057660 WO2007123002A1 (ja) 2006-04-21 2007-04-05 圧縮機

Publications (1)

Publication Number Publication Date
US20090081060A1 true US20090081060A1 (en) 2009-03-26

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ID=38624908

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/297,941 Abandoned US20090081060A1 (en) 2006-04-21 2007-04-05 Compressor

Country Status (6)

Country Link
US (1) US20090081060A1 (de)
EP (1) EP2012011A4 (de)
JP (1) JP2007291881A (de)
KR (1) KR20080106988A (de)
CN (1) CN101421516A (de)
WO (1) WO2007123002A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110126701A1 (en) * 2008-08-21 2011-06-02 Erich Kopp Reciprocating piston engine
CN103415701A (zh) * 2011-03-08 2013-11-27 三电有限公司 压缩机的阀装置
US20140134026A1 (en) * 2011-04-28 2014-05-15 Whirlpool S.A. Valve arrangement for hermetic compressors
US8998592B2 (en) 2011-09-27 2015-04-07 Kabushiki Kaisha Toyota Jidoshokki Compressor
US9243621B2 (en) 2011-09-29 2016-01-26 Kabushiki Kaisha Toyota Jidoshokki Compressor having suction reed valve and valve plate arrangement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5756737B2 (ja) * 2011-11-17 2015-07-29 株式会社豊田自動織機 圧縮機
JP2018048597A (ja) * 2016-09-21 2018-03-29 サンデン・オートモーティブコンポーネント株式会社 圧縮機
CN107605450B (zh) * 2017-08-23 2022-02-08 四川达灿石油设备有限公司 一种压裂开采设备的液力端总成
CN109268274B (zh) * 2018-12-06 2020-04-28 山东金鹏石化设备有限公司 一种离心泵及其装配方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642037A (en) * 1984-03-08 1987-02-10 White Consolidated Industries, Inc. Reed valve for refrigeration compressor
US5885064A (en) * 1997-06-30 1999-03-23 General Motors Corporation Compressor valve assembly with improved flow efficiency
US6336795B1 (en) * 1999-06-01 2002-01-08 Sanden Corporation Fluid displacement apparatus with suction reed valve stopper
US20050056329A1 (en) * 2003-09-17 2005-03-17 Lg Electronics Inc. Discharge valve for compressor

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JPS5333854Y2 (de) * 1973-05-30 1978-08-21
JPS5223603B2 (de) * 1973-06-08 1977-06-25
GB2161583B (en) * 1984-07-10 1988-01-27 Prestcold Ltd Reed valve
US4976284A (en) * 1990-01-16 1990-12-11 General Motors Corporation Reed valve for piston machine
JPH041682U (de) * 1990-04-13 1992-01-08
JPH041682A (ja) * 1990-04-18 1992-01-07 Nec Corp 印刷装置
JP2587085Y2 (ja) 1992-05-06 1998-12-14 株式会社豊田自動織機製作所 ピストン式圧縮機の吸入リード弁機構
US7004734B2 (en) * 1999-12-28 2006-02-28 Zexel Valco Climate Control Corporation Reciprocating refrigerant compressor
JP2003176783A (ja) * 2001-12-10 2003-06-27 Toyota Industries Corp バルブプレートの製造方法
DE102004003137A1 (de) * 2004-01-21 2005-08-11 Behr Gmbh & Co. Kg Kompressionsvorrichtung für gasförmige Medien

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642037A (en) * 1984-03-08 1987-02-10 White Consolidated Industries, Inc. Reed valve for refrigeration compressor
US5885064A (en) * 1997-06-30 1999-03-23 General Motors Corporation Compressor valve assembly with improved flow efficiency
US6336795B1 (en) * 1999-06-01 2002-01-08 Sanden Corporation Fluid displacement apparatus with suction reed valve stopper
US20050056329A1 (en) * 2003-09-17 2005-03-17 Lg Electronics Inc. Discharge valve for compressor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110126701A1 (en) * 2008-08-21 2011-06-02 Erich Kopp Reciprocating piston engine
CN103415701A (zh) * 2011-03-08 2013-11-27 三电有限公司 压缩机的阀装置
US9188117B2 (en) 2011-03-08 2015-11-17 Sanden Corporation Valve device for compressor
US20140134026A1 (en) * 2011-04-28 2014-05-15 Whirlpool S.A. Valve arrangement for hermetic compressors
US8998592B2 (en) 2011-09-27 2015-04-07 Kabushiki Kaisha Toyota Jidoshokki Compressor
US9243621B2 (en) 2011-09-29 2016-01-26 Kabushiki Kaisha Toyota Jidoshokki Compressor having suction reed valve and valve plate arrangement

Also Published As

Publication number Publication date
CN101421516A (zh) 2009-04-29
EP2012011A1 (de) 2009-01-07
WO2007123002A1 (ja) 2007-11-01
KR20080106988A (ko) 2008-12-09
JP2007291881A (ja) 2007-11-08
EP2012011A4 (de) 2010-05-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SANDEN CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TAKAI, KAZUHIKO;REEL/FRAME:022976/0241

Effective date: 20090219

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION