US20030164088A1 - Compressors and pistons for use in such compressors - Google Patents

Compressors and pistons for use in such compressors Download PDF

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Publication number
US20030164088A1
US20030164088A1 US10/372,337 US37233703A US2003164088A1 US 20030164088 A1 US20030164088 A1 US 20030164088A1 US 37233703 A US37233703 A US 37233703A US 2003164088 A1 US2003164088 A1 US 2003164088A1
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US
United States
Prior art keywords
shoe
shoe pocket
interior surface
piston
pocket
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
US10/372,337
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English (en)
Inventor
Keiji Shimizu
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
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to SANDEN CORPORATION reassignment SANDEN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SHIMIZU, KEIJI
Publication of US20030164088A1 publication Critical patent/US20030164088A1/en
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
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0469—Other heavy metals
    • F05C2201/0493—Tin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/14—Self lubricating materials; Solid lubricants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/12—Coating

Definitions

  • the present invention relates generally to compressors for use in automotive air conditioning systems, and pistons for use in such compressors.
  • the invention is directed towards compressors and pistons, in which sufficient lubrication is provided between a shoe and a shoe pocket which receives the shoe.
  • Known swash plate-type compressors include a housing, a swash plate, a plurality of pistons, and a plurality of shoes which each piston engages the swash plate.
  • the housing comprises a crank chamber and a plurality of cylinder bores formed therethrough.
  • the swash plate is rotated by a rotation of a drive shaft which is driven by a driving force, e.g., an engine of a vehicle.
  • Each piston is positioned within a corresponding one of the cylinder bores and reciprocates within the corresponding cylinder bore to compress a refrigerant.
  • Each piston includes a cylindrical, head portion, and the head portion comprises an engaging portion which extends from an end therefrom.
  • a pair of shoe pockets are formed opposite each other within the engaging portion of the pistons.
  • Each of the plurality of shoes are positioned within a corresponding shoe pocket, such that each shoe is positioned between the corresponding shoe pocket and the swash plate.
  • Each shoe is in sliding contact with an end surface of the swash plate.
  • each shoe pocket comprises a concave, hemispherical cross-sectional shape, and a convex, hemispherical portion of each shoe is positioned within the shoe pocket.
  • a communication hole is formed through a portion of the shoe pocket, and a recess is formed in an interior surface of the shoe pocket.
  • the recess is machined by a leading end of a drill, which is used to form the communication hole, and the recess retains lubricating oil.
  • the lubricating oil retained by the recess and blow-by gas supplied at the start of compressor operation may lubricate those portions of the shoe and the shoe pocket, which contact each other.
  • the refrigerant may condense and accumulate in a crank chamber of the compressor, or the refrigerant may evaporate. Moreover, the condensed refrigerant may wash away the lubricating oil which adheres to sliding components of such known compressors, e.g., the shoes, the pistons, the swash plate, or the like, or the lubricating oil separates from the refrigerant, which reduces the amount of lubricating oil between the sliding components of the compressors.
  • the compressor may seize shortly thereafter, e.g., within two seconds after commencement of compressor operation.
  • the piston at a side of the shoe and at a side of the head piston is less balanced relative to if double headed pistons are used. Therefore, the piston and the shoe may seize when they receive a force other than the reaction force.
  • a technical advantage of the present invention is that sufficient lubrication is provided between those portions of the shoe and the shoe pocket, which contact each other, such that the incidence of compressor seizure when compressor operation commences is reduced.
  • a compressor for use in an automotive air conditioning system comprises a front housing and a cylinder block comprising at least one cylinder bore formed therethrough.
  • the compressor also comprises a drive shaft rotatably supported by the cylinder block and the front housing, and a swash plate rotatably mounted on the drive shaft.
  • the compressor comprises at least one piston positioned within the at least one cylinder bore.
  • the at least one piston comprises a head portion and an engaging portion.
  • the engaging portion comprises a first shoe pocket and a second shoe pocket formed therein, and an interior surface of the first shoe pocket comprises a hollow portion formed therein.
  • the interior surface of the first shoe pocket also comprises a lubricant layer formed thereon.
  • the compressor comprises at least one first shoe positioned between the swash plate and the first shoe pocket, and at least one second shoe positioned between the swash plate and the second shoe pocket.
  • a piston for use in a compressor comprises a head portion and an engaging portion.
  • the engaging portion comprises a first shoe pocket and a second shoe pocket formed therein, and an interior surface of the first shoe pocket comprises a hollow portion formed therein.
  • the interior surface of the first shoe pocket also comprises a lubricant layer formed thereon.
  • a piston for use in a compressor comprises a head portion and an engaging portion.
  • the engaging portion comprises a first shoe pocket and a second shoe pocket formed therein, and an interior surface of the first shoe pocket comprises a hollow portion formed therein.
  • the interior surface of the first shoe pocket also comprises a lubricant layer formed thereon, and an interior surface of the second shoe pocket comprises a penetrating aperture formed therein.
  • FIG. 1 is a longitudinal, cross-sectional view of a swash plate-type, fixed displacement compressor, according to an embodiment of the present invention.
  • FIG. 2 a is a side view showing an engaging portion of a piston, according to an embodiment of the present invention.
  • FIG. 2 b is an enlarged, cross-sectional view of a shoe pocket of the piston at a side of a cylinder bore, which has a solid lubrication layer, according to the embodiment of FIG. 2 a.
  • FIG. 2 c is an enlarged, cross-sectional view of a shoe pocket of the piston at a side of the cylinder bore, which has a liquid lubrication layer, according to the embodiment of FIG. 2 a.
  • FIG. 2 d is an enlarged, cross-sectional view of the shoe pocket at aside of a crank chamber, according to the embodiment of FIG. 2 a.
  • FIG. 3 a is a side view showing a method of manufacturing the piston of FIGS. 2 a - 2 c.
  • FIG. 3 b is an enlarged, cross-sectional view of the shoe pocket at the side of the cylinder bore, according to the embodiment of FIG. 2 a.
  • FIG. 4 a is a side view of an engaging portion of a piston, according to another embodiment of the present invention.
  • FIG. 4 b is an enlarged, cross-sectional view of the shoe pocket at the side of the crank chamber, which has the solid lubrication layer, according to the embodiment of FIG. 4 a.
  • FIG. 4 c is an enlarged, cross-sectional view of the shoe pocket at the side of the crank chamber, which has the liquid lubrication layer, according to the embodiment of FIG. 4 a.
  • FIG. 5 a is a side view showing a method of manufacturing the piston depicted in FIGS. 4 a and 4 b.
  • FIG. 5 b is an enlarged, cross-sectional view of the shoe pocket of the piston at a side of a cylinder bore showing the method of manufacturing the piston of FIGS. 4 a and 4 b.
  • FIG. 6 is a longitudinal, cross-sectional view of a swash plate-type, variable displacement compressor, according to yet another embodiment of the present invention.
  • FIGS. 1 - 6 like numerals, being used for like corresponding parts in the various drawings.
  • a compressor 100 for use in an automotive air conditioning system may comprise a front housing 18 , a cylinder block 13 , a valve plate 24 , and a cylinder head 23 which may be fixed to each other by a plurality of bolts 50 .
  • a plurality of cylinder bores 12 may be formed in cylinder block 13 , and cylinder bores 12 may be arranged radically with respect to a center axis of cylinder block 13 .
  • Compressor 100 also may comprise a drive shaft 19 , a swash plate 14 , a plurality of pistons 16 , and a plurality of shoe pairs 15 a and 15 b .
  • Swash plate 14 may be mounted on drive shaft 19 and may maintain its angle against an end surface 11 of cylinder block 13 .
  • Each piston 16 e.g., a single headed piston, may be positioned within a corresponding one of cylinder bores 12 , such that each piston 16 reciprocates independently within the corresponding one of cylinder bores 12 .
  • Each piston 16 may be connected to swash plate 14 via a corresponding one of shoe pairs 15 a and 15 b .
  • swash plate 14 may be positioned within a crank chamber 17 and crank chamber 17 may be formed by front housing 18 and cylinder block 13 .
  • Drive shaft 19 may extend along a center axis of compressor 100 through crank chamber 17 , and drive shaft 19 may be rotatably supported by front housing 19 and cylinder block 13 .
  • a driving source e.g., an engine of a vehicle
  • swash plate 14 also rotates.
  • the rotational movement of swash plate 14 may be converted into a linear reciprocating movement which may be transmitted to piston 16 .
  • piston 16 reciprocates within cylinder bore 12 .
  • refrigerant is drawn into cylinder bore 12 from a suction chamber 21
  • piston 16 compresses the refrigerant.
  • the compressed refrigerant subsequently is discharged into a discharge chamber 22 .
  • Piston 46 may comprise a head portion 25 and an engaging portion 26 .
  • Head portion 25 may be positioned within cylinder bore 12
  • engaging portion 26 may positioned within crank chamber 17 .
  • a hollow chamber 32 may be formed within head portion 25
  • a recess 27 may be formed at engaging portion 26 .
  • a pair of shoe pockets 28 a and 28 b may be formed within a first side wall and a second wall of recess 27 , respectively, and shoe pockets 28 a and 28 b may hold shoes 15 a and 15 b , respectively.
  • Each shoe 15 a and 15 b may comprise a convex, hemispherical portion and a substantially flat portion.
  • Each shoe pocket 28 a and 28 b may comprise a concave, hemispherical portion to receive the convex, hemispherical portion of shoes 15 a and 15 b , respectively.
  • Each shoe 15 a and 15 b may be positioned slidably within a corresponding one of shoe pockets 28 a and 28 b , respectively.
  • shoe pocket 28 a may be positioned at a side of cylinder bore 12
  • shoe pocket 28 b may be positioned at a side of crank chamber 17
  • a hollow portion 31 may be formed at a center of shoe pocket 28 a .
  • Hollow portion 31 may comprise a cylindrical portion and a cone portion, and hollow portion 31 may not extend through hollow chamber 32
  • the diameter of the cylindrical portion of hollow portion 31 may be less than or equal to about three (3) mm.
  • a penetrating aperture 33 may be formed through shoe pocket 28 b which may be positioned opposite hollow portion 31 .
  • the diameter of penetrating aperture 33 may be less than or equal to about three (3) mm.
  • hollow portion 31 may be formed at a center of shoe pocket 28 b
  • penetrating aperture 33 may be formed through, shoe pocket 28 a.
  • hollow portion 31 and penetrating aperture 33 may be formed using a drill 34 .
  • penetrating aperture 33 may be formed by drill 34
  • hollow portion 31 may be formed by drill 34 .
  • lubricant layer 29 may comprise at least one solid lubricant, e.g., molybdenum disulfide, graphite, tungsten disulfide, poly-tetra-fluoro-ethylene, tin, stannum, or the like.
  • lubricant layer 29 may comprise a liquid lubricant, e.g., grease having a viscosity which is efficient for the grease to adhere to the interior surface of shoe pockets 28 a or 28 b , or both.
  • the grease may have a National Lubricating Grease Institute (“NLGI”) consistency grade of 9 .
  • NLGI National Lubricating Grease Institute
  • the interior surface of shoe pocket 28 a and shoe pocket 28 b may be lubricated with the lubricant to form lubricant layer 29 on the interior surface of shoe pocket 28 a and the interior surface of shoe pocket 28 b .
  • compressor 100 may be manufactured, and then hollow portion 31 may be sealed by the hemispherical portion of shoe 15 a . Therefore, even if lubricating oil in crank chamber 17 is washed away, e.g., when the vehicle is not used for the extended amount of time, lubricant layer 29 is not readily washed away. Consequently, when compressor operation commences, a sliding portion between the interior surface of shoe pocket 28 a and the hemispherical surface of shoe 15 a is sufficiently lubricated, and compressor 100 may not seize. Moreover, during operation, hollow portion 3 l may retain the lubricating oil, e.g., when the lubricant layer 29 comprises the liquid lubricant, as shown in FIG.
  • a compressor 100 for use in an automotive air conditioning system according to another embodiment of the present invention is shown.
  • the features and advantages of this embodiment of the present invention are similar to the features and advantages of the above-described embodiments of the present invention. Therefore, the features and advantages of the above-described embodiments of the present invention are not discussed further with respect to this embodiment of the present invention.
  • a first hollow portion 35 may be formed at a center of shoe pocket 28 b
  • a second hollow portion 31 may be formed at a center of shoe pocket 28 a , such that first hollow portion 35 may be positioned opposite second hollow portion 31 .
  • an interior surface of at least one of shoe pockets 28 a and 28 b may be coated by the lubricant to form lubrication layer 29 , as set forth with respect to the above described embodiments of the present invention.
  • Hollow portions 31 and 35 may be formed using a ball end mill 36 .
  • Ball end mill 36 may cut the surfaces of shoe pockets 28 a and 2 b , thereby forming hollow portions 31 and 35 .
  • hollow portions 31 and 35 may be formed by forging.
  • an interior surface of at least one of shoe pocket 28 a and shoe pocket 28 b may be coated by the lubricant used in the above-described embodiments of the present invention.
  • shoe pocket 28 a and shoe pocket 28 b may be coated with the lubricant.
  • compressor 100 may be manufactured, and then hollow portions 31 and 35 may be sealed by the hemispherical surfaces of shoes 15 a and 15 b.
  • a rotor 37 may be fixedly connected to a drive shaft 19
  • swash plate 14 may be slidably mounted on drive shaft 19 .
  • Swash plate 14 may be connected to rotor 37 via a hinge mechanism 38 , such that an inclination angle of swash plate 14 may vary and swash plate 14 rotates with drive shaft 19 .
  • the inclination angle of smash plate 14 is controlled by a capacity control mechanism 39 , and the inclination angle of swash plate 14 varies.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US10/372,337 2002-03-04 2003-02-25 Compressors and pistons for use in such compressors Abandoned US20030164088A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002057557A JP2003254232A (ja) 2002-03-04 2002-03-04 自動車空調用圧縮機及びそれに使用されるピストン
JPP2002-057557 2002-03-04

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US20030164088A1 true US20030164088A1 (en) 2003-09-04

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US10/372,337 Abandoned US20030164088A1 (en) 2002-03-04 2003-02-25 Compressors and pistons for use in such compressors

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JP (1) JP2003254232A (ja)
DE (1) DE10308587A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100803613B1 (ko) * 2006-12-08 2008-02-19 학교법인 두원학원 왕복동 사판식 압축기의 피스톤 자전방지 구조

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945765A (en) * 1974-04-15 1976-03-23 Sankyo Electric Co., Ltd. Refrigerant compressor
US4005948A (en) * 1974-10-09 1977-02-01 Sankyo Electric Co., Ltd. Lubrication system for compressor unit
US4236878A (en) * 1978-09-29 1980-12-02 Sankyo Electric Company Limited Lubrication system for compressor unit
US4662267A (en) * 1980-03-28 1987-05-05 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Swash plate type compressor shoe
US4893993A (en) * 1986-08-01 1990-01-16 Sanden Corporation Lubrication system for a refrigerant compressor
US5131319A (en) * 1990-02-19 1992-07-21 Sanden Corporation Wobble plate type refrigerant compressor having a ball-and-socket joint lubricating mechanism
US5393204A (en) * 1992-01-29 1995-02-28 Sanden Corporation Wobble plate type refrigerant compressor
US5415077A (en) * 1993-02-15 1995-05-16 Sanden Corporation Supporting mechanism for a wobble plate and method of making same
US5495789A (en) * 1993-03-10 1996-03-05 Sanden Corporation Swash plate type compressor with lubricating mechanism between the shoe and swash plate
US5730249A (en) * 1995-11-30 1998-03-24 Sanden Corporation Fluid displacement apparatus with a lubricating mechanism driven by a wobble plate balancing weight
US5772406A (en) * 1994-03-18 1998-06-30 Sanden Corporation Piston-type compressor with a lubricating system
US5784950A (en) * 1996-03-26 1998-07-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Single headed swash plate type compressor having a piston with an oil communication hole on a side of the piston remote from the cylinder bore and crank chamber
US5937735A (en) * 1996-12-12 1999-08-17 Sanden Corporation Swash-plate compressor having a thrust race with a radial flange insuring supply of a lubricating oil to a drive shaft bearing
US5950521A (en) * 1996-12-18 1999-09-14 Sanden Corporation Swash-plate compressor capable of insuring sufficient lubrication between a piston and a shoe slidably interposed between the piston and a swash plate
US6050783A (en) * 1997-01-10 2000-04-18 Sanden Corporation Reciprocating compressor in which a blowby gas can be returned into a suction chamber with a lubricating oil within a crank chamber kept at a sufficient level
US6098520A (en) * 1997-06-30 2000-08-08 Sanden Corporation Swash plate compressor in which a swash plate has a sliding surface non-parallel to a reference surface thereof
US6276905B1 (en) * 1998-12-14 2001-08-21 Sanden Corporation Piston-shoe arrangement for a swash plate compressor
US6321635B1 (en) * 1998-09-22 2001-11-27 Sanden Corporation Swash plate type compressor in which lubricating oil is effectively supplied to a shoe mechanism interposed between a piston and a swash plate
US6371007B1 (en) * 1999-03-25 2002-04-16 Sanden Corporation Swash plate type compressor with a lubricated shoe-and-socket piston joint
US6589021B2 (en) * 2000-07-14 2003-07-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Single-headed piston type swash plate compressor

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945765A (en) * 1974-04-15 1976-03-23 Sankyo Electric Co., Ltd. Refrigerant compressor
US4005948A (en) * 1974-10-09 1977-02-01 Sankyo Electric Co., Ltd. Lubrication system for compressor unit
US4236878A (en) * 1978-09-29 1980-12-02 Sankyo Electric Company Limited Lubrication system for compressor unit
US4662267A (en) * 1980-03-28 1987-05-05 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Swash plate type compressor shoe
US4893993A (en) * 1986-08-01 1990-01-16 Sanden Corporation Lubrication system for a refrigerant compressor
US5131319A (en) * 1990-02-19 1992-07-21 Sanden Corporation Wobble plate type refrigerant compressor having a ball-and-socket joint lubricating mechanism
US5393204A (en) * 1992-01-29 1995-02-28 Sanden Corporation Wobble plate type refrigerant compressor
US5415077A (en) * 1993-02-15 1995-05-16 Sanden Corporation Supporting mechanism for a wobble plate and method of making same
US5495789A (en) * 1993-03-10 1996-03-05 Sanden Corporation Swash plate type compressor with lubricating mechanism between the shoe and swash plate
US5772406A (en) * 1994-03-18 1998-06-30 Sanden Corporation Piston-type compressor with a lubricating system
US5730249A (en) * 1995-11-30 1998-03-24 Sanden Corporation Fluid displacement apparatus with a lubricating mechanism driven by a wobble plate balancing weight
US5784950A (en) * 1996-03-26 1998-07-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Single headed swash plate type compressor having a piston with an oil communication hole on a side of the piston remote from the cylinder bore and crank chamber
US5937735A (en) * 1996-12-12 1999-08-17 Sanden Corporation Swash-plate compressor having a thrust race with a radial flange insuring supply of a lubricating oil to a drive shaft bearing
US5950521A (en) * 1996-12-18 1999-09-14 Sanden Corporation Swash-plate compressor capable of insuring sufficient lubrication between a piston and a shoe slidably interposed between the piston and a swash plate
US6050783A (en) * 1997-01-10 2000-04-18 Sanden Corporation Reciprocating compressor in which a blowby gas can be returned into a suction chamber with a lubricating oil within a crank chamber kept at a sufficient level
US6098520A (en) * 1997-06-30 2000-08-08 Sanden Corporation Swash plate compressor in which a swash plate has a sliding surface non-parallel to a reference surface thereof
US6321635B1 (en) * 1998-09-22 2001-11-27 Sanden Corporation Swash plate type compressor in which lubricating oil is effectively supplied to a shoe mechanism interposed between a piston and a swash plate
US6276905B1 (en) * 1998-12-14 2001-08-21 Sanden Corporation Piston-shoe arrangement for a swash plate compressor
US6371007B1 (en) * 1999-03-25 2002-04-16 Sanden Corporation Swash plate type compressor with a lubricated shoe-and-socket piston joint
US6589021B2 (en) * 2000-07-14 2003-07-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Single-headed piston type swash plate compressor

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DE10308587A1 (de) 2003-09-25
JP2003254232A (ja) 2003-09-10

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AS Assignment

Owner name: SANDEN CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHIMIZU, KEIJI;REEL/FRAME:014115/0337

Effective date: 20030225

STCB Information on status: application discontinuation

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