US20040223863A1 - Piston operating assembly for a linear compressor and method for manufacturing the same - Google Patents
Piston operating assembly for a linear compressor and method for manufacturing the same Download PDFInfo
- Publication number
- US20040223863A1 US20040223863A1 US10/866,935 US86693504A US2004223863A1 US 20040223863 A1 US20040223863 A1 US 20040223863A1 US 86693504 A US86693504 A US 86693504A US 2004223863 A1 US2004223863 A1 US 2004223863A1
- Authority
- US
- United States
- Prior art keywords
- piston
- operating assembly
- magnets
- coupling boss
- linear compressor
- 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
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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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- 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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
-
- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
- F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
-
- 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
- F04B39/14—Provisions for readily assembling or disassembling
Abstract
An integrated piston operating assembly for a linear compressor and a method for manufacturing the same are provided. The integrated piston operating assembly includes a piston coupling boss coupled to a piston, a plurality of magnets disposed in a cylindrical arrangement concentric with the piston coupling boss, and a linking member formed of a resin for connecting and thus integrating the piston coupling boss with the plurality of magnets. The magnets and piston coupling boss are secured to the linking member as the linking member is injection molded. By integrating the piston operating assembly of the linear compressor, geometric and assembling tolerances are improved, while deterioration of persistence due to processing and assembling processes is prevented.
Description
- 1. Field of the Invention
- The present invention relates to a linear compressor for compressing refrigerant by using a reciprocating piston. More particularly, the present invention relates to a piston operating assembly for the linear compressor and a method for manufacturing the same.
- 2. Description of the Prior Art
- Generally, a linear compressor compresses a refrigerant by reciprocating a piston with a changing magnetic field. Such a compressor is shown in FIGS. 1 through 3.
- As shown in the drawings, the linear compressor includes a
cylinder portion 10, apiston 20, apiston operating assembly 30 and anexternal lamination portion 40, all of which are disposed in a chamber 1. - As shown in FIG. 2, the
piston operating assembly 30 includes amagnet holder 32, which is a hollow cylinder having a hole formed in an outer circumference thereof, amagnet 33 inserted in the hole of themagnet holder 32, amagnet cover 35 press fit on the outer circumference of themagnet holder 32 to prevent any accidental separation of themagnet 33 from themagnet holder 32, and a linkingmember 31 having a hole formed on the center portion thereof for receiving thepiston 20. The linkingmember 31 is connected to one end of themagnet holder 32. - The
piston 20 is a hollow cylinder, having one end attached to asuction valve 25 and the other end coupled to the linkingmember 31 of thepiston operating assembly 30. Thepiston 20 can be secured to the linkingmember 31 by one of a number of methods, such as welding, etc. - The
cylinder portion 10 includes a cylinder 11, in which thepiston 20 is received for reciprocating movement, aninternal lamination 13 inserted about the outer circumference of the cylinder 11, and acoil 15 wound about the center portion of theinternal lamination 13. - An
external lamination portion 40 includes anexternal lamination 41 formed a predetermined distance from theinternal lamination 13, ahousing 43 for supporting theexternal lamination 41, and aframe 42. - The operation of the linear compressor constructed as above will be described below.
- First, when Alternating Current (AC) voltage is applied to the
coil 15 of theinternal lamination 13, a magnetic field having N-S poles is generated between the internal andexternal laminations permanent magnet 33 disposed between the internal andexternal laminations magnet 33 are varied, themagnet 33 reciprocates, and accordingly, thepiston 20 also reciprocates. - Next, a refrigerant is introduced into the chamber1 through an
inlet tube 3 by the reciprocating movement of thepiston 20. The refrigerant flows through thepiston 20 and thesuction valve 25 and into acompressing chamber 5. When the refrigerant is compressed in thecompressing chamber 5, the refrigerant is then discharged through anoutlet tube 7. - The conventional linear compressor, however, has several shortcomings. First, some parts of the compressor require forceful coupling methods, such as force fit, welding, etc., to secure the parts together. For example, the
piston 20 and linkingmember 31 are welded together, as are the linkingmember 31 and themagnet holder 32. Further, themagnet holder 32 must undergo processes like cutting, punching and welding. The force of the couplings and heat distortion of the respective parts produce an internal stress that affects the integrity of the parts. Further, the conventional linear compressor has a complex and lengthy assembly process, while producing a high possibility of defective products. As a result, productivity and throughput are deteriorated. - The manufacturing process of the
magnet holder 32 is described in greater detail with reference to FIG. 3. First, ametal plate 32 a of a predetermined size is prepared. Then, themetal plate 32 a undergoes a rolling process. Next, the ends of themetal plate 32 a are welded together to form ahollow cylinder 32 b. Thehollow cylinder 32 b is then punched to form a plurality ofholes 32 c therein. Finally, in order to prevent any accidental separation of themagnets 33 from thehollow cylinder 32 b, amagnet cover 35 is force fit onto the outer circumference of thehollow cylinder 32 b. - In the conventional linear compressor, the different sizes of and deviations among the
magnets 33 make it difficult to press fit or force fit themagnet cover 35. When themagnet cover 35 is forcefully press fit, without taking into consideration the different sizes of themagnets 33, thosemagnets 33 that are more fragile can be broken. - Further, according to a conventional way of assembling the
piston operating assembly 30 of the linear compressor, an error in concentricity occurs when thepiston 20 and themagnet holder 32 are welded to the linkingmember 31, and errors in circularity and concentricity occur when press fitting themagnet 33, which is press fit in themagnet holder 32, in themagnet cover 35. Accordingly, productivity and throughput deteriorate. Further, since there are numerous parts that must be assembled together, all of which affect the geometric tolerance of thepiston operating assembly 30, the assembly tolerance is increased due to an accumulation of the tolerances of the respective parts. When the geometric tolerance and the assembly tolerance exceed a predetermined degree, the same becomes a defect factor, which can cause problems, such as a malfunction of the linear compressor, etc. - In addition, in the conventional method of assembling the linear compressor, a non-magnetic metal is used to form the
magnet holder 32, thereby preventing a leakage of the magnetic force from themagnet 33. The non-magnetic metal of the conventional linear compressor, however, has a relatively higher conductivity, which hinders a complete absence of the magnetic force leakage from themagnet 33. Accordingly, due to the leakage of the magnetic force from themagnet 33, the compression efficiency of the linear compressor is negatively affected. - The present invention has been made to overcome the above-mentioned problems of the prior art. Accordingly, it is an object of the present invention to provide a piston operating assembly for a linear compressor having a piston coupling boss coupled with a piston, a plurality of magnets, and a linking member. The linking member connects the piston coupling boss with the magnets, all of which are integrally secured to the linking member when the linking member is injection molded. Thus, the integrated piston operating assembly has improved geometric and assembling tolerances and no deterioration of persistence.
- It is another object of the present invention to provide a method for manufacturing a piston operating assembly for a linear compressor. In the present method the processes are simplified while resulting in a higher productivity.
- The above object is accomplished by a piston operating assembly of a linear compressor for compressing a refrigerant with a piston that linearly reciprocates due to a magnetic field. The piston operating assembly includes a piston coupling boss for coupling to the piston, a plurality of magnets disposed in a cylindrical arrangement concentric with respect to the piston coupling boss, and a linking member for connecting and thus integrating the piston coupling boss and the plurality of magnets. The linking member is formed of an injection molded resin, and the piston coupling boss and the magnets are coupled to the linking member at the same time that the linking member is injection molded.
- Each of the magnets has a stepped portion that is formed along a boundary thereof.
- The above object is also accomplished by a method for manufacturing a piston operating assembly for a linear compressor. The method includes the steps of preparing a plurality of magnets and a piston coupling boss, assembling the plurality of magnets and the piston coupling boss in a core mold, and mounting the core mold in an injection molding machine. The method further includes injecting a molding resin into the core mold to form an integrated piston operating assembly, with the plurality of magnets and the piston coupling boss fixed in the molding resin. The completed integrated piston operating assembly is then separated from the core mold, once the injection molding is finished.
- Accordingly, the piston operating assembly of the linear compressor has improved geometric and assembling tolerances and persistence. In addition, the method of manufacturing such piston operating assembly is greatly simplified and results in an increase in productivity.
- The above objects and other features and advantages of the present invention will become readily apparent by reference to the following detailed description when considered in conjunction with the accompanying drawings, in which:
- FIG. 1 is a sectional view of a conventional linear compressor;
- FIG. 2 is a sectional view of a piston operating assembly for the conventional linear compressor of FIG. 1;
- FIG. 3 illustrates the steps for manufacturing a conventional magnet holder for the conventional linear compressor of FIG. 1;
- FIG. 4 is a plan view of a plurality of magnets, which are employed in a piston operating assembly for a linear compressor, in accordance with the present invention;
- FIG. 5 is a sectional view of a piston coupling boss, which is employed in the piston operating assembly for the linear compressor, in accordance with the present invention;
- FIG. 6 is a perspective view of the piston operating assembly for the linear compressor, in accordance with the present invention;
- FIG. 7A is a plan view of a core mold, which is used to manufacture the piston operating assembly of FIG. 6;
- FIG. 7B is a cross-sectional view taken generally along the line I-I of FIG. 7A;
- FIG. 8 is a sectional view of the core mold of FIGS. 7A and 7B shown mounted in an injection molding machine during manufacture of the piston operating assembly of FIG. 6; and
- FIG. 9 is a flow chart illustrating the steps in a method for manufacturing the piston operating assembly of FIG. 6.
- The preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
- FIG. 6 is a perspective view of a
piston operating assembly 50 for a linear compressor in accordance with the present invention. - The
piston operating assembly 50 includes a plurality ofmagnets 51 disposed in a cylindrical arrangement and spaced from each other at equal intervals, a hollowpiston coupling boss 52 concentrically disposed within the cylindrical arrangement, and a linkingmember 53 for connecting the cylindrical arrangement to an end of thepiston coupling boss 52. Themagnets 51,piston coupling boss 52, and linkingmember 53 are preferably secured together simultaneously with the formation of the linkingmember 53.. - In order to compress a refrigerant, a piston reciprocates in the cylinder of a linear compressor. The piston operating assembly, which moves the piston within the cylinder of the compressor, includes a
piston coupling boss 52 that has ascrew portion 52 b (FIG. 5). Thescrew portion 52 b includes threads that engage the threads formed at one end of the piston. The integrated piston operating assembly is preferably injection molded using a molding resin. As shown in FIG. 5, in order to increase the coupling force between thepiston coupling boss 52 and the molding resin, afemale screw portion 52 b is formed in one end of thepiston coupling boss 52, while a raisedportion 52 a is formed at the opposite end. It is further preferable that thepiston coupling boss 52 is made of a brass. - Because of the changes of magnetic field between the internal and
external laminations magnets 51 cause the piston to reciprocate. Eachmagnet 51 has a stepped portion formed around its boundary. As shown in FIG. 4, eachmagnet 51 is a square plate having a predetermined radius of curvature. The two opposite sides of themagnet 51 are processed to have an L-shaped cross-section, while the other two opposite sides of themagnet 51 are processed to have an upended L-shaped cross-section. By processing the sides of themagnet 51 to have L-shaped and upended L-shaped cross-sections, the coupling force between thepiston operating assembly 50 and the molding resin is increased when thepiston operating assembly 50 is integrally formed by injection molding. - The molding resin is preferably a non-magnetic and non-conductive thermosetting resin, such as a bulk molding compound composed of polyester as a main material, glass fiber as a reinforcing material, filler, and catalyst, etc.
- In the
piston operating assembly 50 for the linear compressor of the present invention, since thepiston coupling boss 52 and the plurality ofmagnets 51 are integrally formed in the integrated molding resin, which forms the linkingmember 53, the separate process steps of assembling themagnets 51 and press fitting themagnet cover 35 are no longer required. In addition, the assembly of the piston is completed by screwing the piston onto thepiston coupling boss 52. - The integrated
piston operating assembly 50 reciprocates due to a changing magnetic field, which is generated by theinternal lamination 13 andcoil 15 disposed within the cylindrical arrangement ofmagnets 51, and theexternal lamination 41 disposed outside the cylindrical arrangement ofmagnets 51. When thepiston operating assembly 50 reciprocates, the piston, which is coupled with thepiston operating assembly 50, also reciprocates linearly within the cylinder. Accordingly, the refrigerant is drawn into the compressing chamber and then compressed. - A method for manufacturing the
piston operating assembly 50 for the linear compressor in accordance with the preferred embodiment of the present invention will be described below with reference to FIGS. 7-9. - As illustrated in FIG. 9, the method for manufacturing the integrated
piston operating assembly 50 includes the steps of preparing a plurality ofmagnets 51 and a piston coupling boss 52 (step S100), assembling the plurality ofmagnets 51 and thepiston coupling boss 52 in a core mold 60 (FIGS. 7A and 7B) and mounting thecore mold 60 in an injection molding machine (step S200), integrally injection molding thepiston operating assembly 50 with the plurality ofmagnets 51 and the piston coupling boss 52 (step S300), and then separating the completed thepiston operating assembly 50 for the linear compressor from thecore mold 60 when the molding process is finished (step S400). - In the preparation step S100, the
magnets 51 and thepiston coupling boss 52, which are made by separate processes, are prepared for assembly into thecore mold 60. In this embodiment, onepiston coupling boss 52 and eightmagnets 51 are used. Accordingly, eightmagnets 51 and onepiston coupling boss 52 are prepared. Themagnets 51 are initially non-magnetized magnets. - In the mold mounting step S200, the eight
magnets 51 and thepiston coupling boss 52 are assembled in thecore mold 60. Thecore mold 60 is then mounted between anupper mold 70 and alower mold 80 of the injection molding machine. Thecore mold 60 has a plurality of linear projections 61 (FIGS. 7A and 7B) that are formed on the outer circumference thereof. Thelinear projections 61 extend parallel to the axis of thecore mold 60 and are spaced apart at equal intervals to accommodate themagnets 51. In order to magnetize thenon-magnetic magnets 51,additional magnets 62 are disposed within thecore mold 60. Further, a screw portion is formed at the center of thecore mold 60, to secure thepiston coupling boss 52. Thepiston operating assembly 50 of the present invention has less geometric error, for example, less error in concentricity, since a relatively shorterpiston coupling boss 52 is secured thereto by injection molding. In contrast, in a conventional piston operating assembly, a longer piston is welded onto the linking member. - After the
core mold 60 is mounted in the injection molding machine, the injection molding process begins. A molding resin is injected in the direction indicated by an arrow P in FIG. 8 into thecore mold 60. The molding resin fills in the area of thecore mold 60 that is indicated by the cross-hatching in FIG. 8 to surround thepiston coupling boss 52 and themagnets 51. As a result, the integratedpiston operating assembly 50 is formed at step S300. Gravity helps to draw the molding resin down through the gaps defined between the plurality ofprojections 61 of thecore mold 60 to surround themagnets 51, so that themagnets 5 1 are fixedly secured by the molding resin. - After a predetermined time period, the molding resin solidifies and cools. At step S400 the completed
piston operating assembly 50 is then removed from between the upper andlower molds - The present method for manufacturing the
piston operating assembly 50 improves the geometric and assembly tolerances of the resulting piston operating assembly, by eliminating forceful coupling methods for securing the piston coupling boss and the magnets to the linking member. Themagnets 51 and thecoupling boss 52 are each coupled to the linkingmember 53 as the linkingmember 53 is injection molded. - Furthermore, the present method for manufacturing the
piston operating assembly 50 for the linear compressor improves productivity, since the numerous assembly process steps are simplified by injection molding. The L-shaped cross-section of themagnets 51 secures the magnets to the linkingmember 53, thereby eliminating the need for a separate magnet cover. In addition, the piston is easily connected to thepiston operating assembly 50, by matingly engaging the threads at the end of the piston with thescrew portion 52 b of thepiston coupling boss 52. - As stated above, a preferred embodiment of the present invention is shown and described. Although the preferred embodiment of the present invention has been described, it is understood that the present invention should not be limited to this preferred embodiment. Various changes and modifications can be made by one skilled in the art within the spirit and scope of the present invention as hereinafter claimed.
Claims (6)
1-4. (canceled).
5. A method for manufacturing a piston operating assembly for a linear compressor comprising:
preparing a plurality of magnets and a piston coupling boss;
assembling the plurality of magnets and the piston coupling boss in a core mold;
mounting the core mold in an injection molding machine; and
injecting a molding resin in the core mold to form an integrated piston operating assembly including the plurality of magnets and the piston coupling boss.
6. The method as claimed in claim 5 , further comprising separating the integrated piston operating assembly from the core mold.
7. The method as claimed in claim 5 , wherein each magnet has a stepped portion formed along a boundary thereof, and wherein the molding resin engages the stepped portion of the magnets to secure the magnets in the piston operating assembly.
8. The method as claimed in claim 5 , wherein the piston coupling boss is comprised of brass.
9. The method as claimed in claim 5 , wherein the piston coupling boss includes a screw portion for engaging a threaded end of a piston.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/866,935 US20040223863A1 (en) | 2000-11-10 | 2004-06-14 | Piston operating assembly for a linear compressor and method for manufacturing the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2000-66866 | 2000-11-10 | ||
KR1020000066866A KR100701871B1 (en) | 2000-11-10 | 2000-11-10 | Piston-drive part of linear compressor and method of producting the same |
US09/834,344 US6761543B2 (en) | 2000-11-10 | 2001-04-12 | Piston operating assembly for a linear compressor and method for manufacturing the same |
US10/866,935 US20040223863A1 (en) | 2000-11-10 | 2004-06-14 | Piston operating assembly for a linear compressor and method for manufacturing the same |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/834,344 Division US6761543B2 (en) | 2000-11-10 | 2001-04-12 | Piston operating assembly for a linear compressor and method for manufacturing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040223863A1 true US20040223863A1 (en) | 2004-11-11 |
Family
ID=19698419
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/834,344 Expired - Fee Related US6761543B2 (en) | 2000-11-10 | 2001-04-12 | Piston operating assembly for a linear compressor and method for manufacturing the same |
US10/866,935 Abandoned US20040223863A1 (en) | 2000-11-10 | 2004-06-14 | Piston operating assembly for a linear compressor and method for manufacturing the same |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/834,344 Expired - Fee Related US6761543B2 (en) | 2000-11-10 | 2001-04-12 | Piston operating assembly for a linear compressor and method for manufacturing the same |
Country Status (6)
Country | Link |
---|---|
US (2) | US6761543B2 (en) |
JP (1) | JP3739683B2 (en) |
KR (1) | KR100701871B1 (en) |
CN (1) | CN1140702C (en) |
BR (1) | BR0101810A (en) |
IT (1) | ITTO20010605A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100486572B1 (en) * | 2002-09-04 | 2005-05-03 | 엘지전자 주식회사 | Reciprocating compressor |
AU2003250569A1 (en) * | 2003-07-25 | 2005-02-14 | Lg Electronics Inc. | Pistion assembly of cooler |
CN100383382C (en) * | 2003-10-30 | 2008-04-23 | 乐金电子(天津)电器有限公司 | Silencer fixing structure for linear compressor |
KR100619731B1 (en) * | 2004-07-26 | 2006-09-08 | 엘지전자 주식회사 | Reciprocating motor and reciprocating compressor having the reciprocating motor |
US8678789B2 (en) * | 2005-07-22 | 2014-03-25 | Fisher & Paykel Appliances Limited | Refrigeration compressor with flexible discharge conduit |
KR100796697B1 (en) * | 2007-11-02 | 2008-01-21 | 주식회사 신금하 | Manufacturing method of magnet assembly for compressor linear motor |
CN103850919A (en) * | 2012-12-03 | 2014-06-11 | 海尔集团公司 | Piston of linear compressor and linear compressor |
CN104005931B (en) * | 2013-02-21 | 2016-04-27 | 青岛海尔智能技术研发有限公司 | Linearkompressor |
US9518572B2 (en) * | 2014-02-10 | 2016-12-13 | Haier Us Appliance Solutions, Inc. | Linear compressor |
KR102424602B1 (en) * | 2018-02-26 | 2022-07-25 | 엘지전자 주식회사 | Linear compressor |
KR102401335B1 (en) | 2020-03-27 | 2022-05-23 | 엘지전자 주식회사 | Linear motor and linear compressor thereof |
Citations (6)
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US5993175A (en) * | 1995-06-23 | 1999-11-30 | Lg Electronics Inc. | Oil supply apparatus for friction portion of linear compressor |
US6024544A (en) * | 1995-06-23 | 2000-02-15 | Lg Electronics Inc. | Coolant supply apparatus for linear compressor |
US20010014292A1 (en) * | 2000-02-14 | 2001-08-16 | Matsushita Electric Industrial Co., Ltd. | Linear compressor |
US6324745B1 (en) * | 1997-02-21 | 2001-12-04 | Emerson Electric Co. | Method of assembling a rotor assembly for a rotating machine |
US20010055535A1 (en) * | 2000-06-19 | 2001-12-27 | Matsushita Electric Industrial Co., Ltd. | Linear compressor |
US6379125B1 (en) * | 1996-07-09 | 2002-04-30 | Sanyo Electric Co., Ltd. | Linear compressor |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200197564Y1 (en) * | 1997-12-19 | 2000-10-02 | 윤종용 | A linear compessor |
-
2000
- 2000-11-10 KR KR1020000066866A patent/KR100701871B1/en not_active IP Right Cessation
-
2001
- 2001-04-12 US US09/834,344 patent/US6761543B2/en not_active Expired - Fee Related
- 2001-04-19 CN CNB011107847A patent/CN1140702C/en not_active Expired - Fee Related
- 2001-05-08 BR BR0101810-8A patent/BR0101810A/en active Search and Examination
- 2001-06-22 IT IT2001TO000605A patent/ITTO20010605A1/en unknown
- 2001-09-04 JP JP2001267288A patent/JP3739683B2/en not_active Expired - Fee Related
-
2004
- 2004-06-14 US US10/866,935 patent/US20040223863A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5993175A (en) * | 1995-06-23 | 1999-11-30 | Lg Electronics Inc. | Oil supply apparatus for friction portion of linear compressor |
US6024544A (en) * | 1995-06-23 | 2000-02-15 | Lg Electronics Inc. | Coolant supply apparatus for linear compressor |
US6379125B1 (en) * | 1996-07-09 | 2002-04-30 | Sanyo Electric Co., Ltd. | Linear compressor |
US6324745B1 (en) * | 1997-02-21 | 2001-12-04 | Emerson Electric Co. | Method of assembling a rotor assembly for a rotating machine |
US20010014292A1 (en) * | 2000-02-14 | 2001-08-16 | Matsushita Electric Industrial Co., Ltd. | Linear compressor |
US6506032B2 (en) * | 2000-02-14 | 2003-01-14 | Matsushita Electric Industrial Co., Ltd. | Linear compressor |
US20010055535A1 (en) * | 2000-06-19 | 2001-12-27 | Matsushita Electric Industrial Co., Ltd. | Linear compressor |
US6565332B2 (en) * | 2000-06-19 | 2003-05-20 | Matsushita Electric Industrial Co., Ltd. | Linear compressor |
Also Published As
Publication number | Publication date |
---|---|
ITTO20010605A1 (en) | 2002-12-22 |
KR20020036610A (en) | 2002-05-16 |
US20020057973A1 (en) | 2002-05-16 |
JP2002155859A (en) | 2002-05-31 |
US6761543B2 (en) | 2004-07-13 |
KR100701871B1 (en) | 2007-04-02 |
JP3739683B2 (en) | 2006-01-25 |
CN1140702C (en) | 2004-03-03 |
BR0101810A (en) | 2002-07-02 |
CN1353246A (en) | 2002-06-12 |
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Legal Events
Date | Code | Title | Description |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |