Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
  • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
  • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
  • F04C18/32—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members
  • F04C18/324—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members with vanes hinged to the inner member and reciprocating with respect to the outer member
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
  • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
  • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
  • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C2250/00—Geometry
  • F04C2250/10—Geometry of the inlet or outlet
  • F04C2250/101—Geometry of the inlet or outlet of the inlet
• • 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
  • F05B2250/00—Geometry
  • F05B2250/50—Inlet or outlet
  • F05B2250/501—Inlet

Definitions

• the present invention relates to a rotary compressor mainly used for a refrigeration system.
• a rotary compressor for example, a rotary compressor described in Japanese Utility Model Laid-Open Publication No. 63-548882 has been known.
• this conventional compressor as shown in FIG. 9, a roller C inserted into an eccentric shaft portion S of a drive shaft is provided in a cylinder chamber A1 of a cylinder A, and the cylinder A A front head (not shown) is provided on one side in the axial direction, and a liya head (not shown) is provided on the other side in the free side, while a suction hole D opening in the cylinder chamber A1 is provided.
• a discharge hole E is formed at a predetermined interval in the circumferential direction, and a blade holding groove F extending in the radial direction is provided between the suction hole!) And the discharge hole E, and the blade G advances and retreats in the holding groove F.
• the tip of the blade G is always in contact with the outer peripheral surface of the roller C, so that the inside of the cylinder chamber A1 communicates with the low-pressure chamber X communicating with the suction hole D and the discharge hole E. It is divided into a high-pressure chamber Y.
• the suction hole D is located near the blade G of the cylinder A in the radial direction toward the center of the cylinder chamber A1, in other words, the center line force of the suction hole D ⁇ the intersection with the center line. It is formed in a direction perpendicular to the tangent to the inner peripheral surface of the cylinder chamber A1 at the point where the pressure is changed.
• the roller C is composed of two inner and outer roller members.
• An object of the present invention is to provide a rotary compressor that can reduce the flow resistance when a gas fluid is sucked from a suction hole into a low-pressure chamber of a cylinder chamber, and reduce suction pressure loss in the low-pressure chamber. It is in.
• a rotary compressor is provided with a cylinder having a cylinder chamber in which a suction hole and a discharge hole are opened, fitted to an eccentric shaft portion of a drive shaft, and housed in the cylinder chamber.
• a center line is formed to be inclined toward the blade with respect to a normal line perpendicular to a tangent to a virtual point intersecting the center line on the inner peripheral surface of the cylinder chamber.
• the center line of the suction hole at least on the opening side to the cylinder chamber is perpendicular to a tangent to an imaginary point intersecting the center line on the inner peripheral surface of the cylinder chamber.
• the center line of the suction hole on the suction pipe connection side is directed to the center of the cylinder chamber. Therefore, when the suction pipe or the inlet tube connecting the suction pipe is press-fitted into the suction hole, the suction pipe or the like can be connected toward the center of the cylinder.
• the cylinder When press-fitting in the same direction as the center line on the opening side, i.e., the cylinder is subjected to a rotating action by press-fitting in the direction of the center line on the opening side, and a rotational moment is generated. It is possible to solve the problem that the parts are easily distorted and the gap of the assembly gap is easily generated.
• the arrangement position of the blade and the suction hole are close to each other, and the closing member of the front head and the lid head is connected to the cylinder by bolt tightening.
• the front head and the lid head disposed in the axial direction of the cylinder and the end face of the cylinder.
• the surface pressure between the end surfaces of the closing members decreases, and as a result, a force that causes leakage between the end surfaces can also be solved.
• the flow resistance of the suction gas fluid is reduced, and the pressure loss in the low pressure chamber is reduced. It is possible to prevent the distortion of parts and the displacement of the assembly gap, while securing a space between the arrangement position of the blade and the inlet side of the suction hole, thereby enabling bolt tightening. Leakage from the end face of the member can be prevented, and the hand pipe that was attached when connecting the suction pipe can also be connected toward the center of the cylinder. Therefore, welding work can be easily performed.
• a closing member attached to one side in the axial direction of the cylinder and closing one side in the axial direction of the cylinder chamber is provided with a suction passage communicating with the suction pipe.
• the side is formed to be inclined toward the cylinder, and is connected to the suction hole.
• the flow resistance can be reduced from the closing member. That is, when the roller and the cylinder chamber have a large diameter and a flat shape and their axial dimensions are reduced to be small, or by using a plurality of cylinders,
• the diameter of the suction pipe connected to the cylinder becomes smaller due to the flattening of the cylinder, and a sufficient suction hole size cannot be obtained.
• a suction passage in the closing member such as a head
• a required suction hole size can be secured.
• the tip end of the suction passage is inclined toward a cylinder, and Since it is continuous with the suction hole inclined to the blade side with respect to the normal to the tangent line of the inner peripheral surface of the chamber, a required amount of gas fluid corresponding to the volume of the cylinder chamber is supplied from the suction pipe.
• the flow resistance can be reduced into the low pressure chamber in the cylinder chamber through the suction passage and the suction hole, and the pressure loss in the low pressure chamber can be reduced.
• suction in a suction passage formed in the closing member The center line on the inlet side communicating with the pipe faces the center of the cylinder chamber, and the center line on the side of the suction passage connected to the suction hole is the center of the opening side of the suction hole to the cylinder chamber. It is inclined in the same direction as the line.
• the suction pipe can be connected toward the center of the cylinder. Therefore, a required amount of gas fluid corresponding to the volume of the cylinder chamber is introduced from the suction pipe through the suction passage and the suction hole into the low pressure chamber in the cylinder chamber with a small flow resistance, so that the pressure loss in the low pressure chamber is reduced. In addition, distortion of parts and displacement of assembly gap can be prevented, and a space for bolt tightening can be secured between the blade installation position and the inlet side of the suction hole, thereby preventing leakage. It is.
• the blade is coupled to an outer peripheral portion of the roller in a protruding manner
• the cylinder has a swing bush having a receiving groove for freely receiving a protruding tip side of the blade.
• a guide groove for guiding the suction gas introduced from the suction hole into the low-pressure chamber is recessed in the outer peripheral surface of the roller, which is movably held and faces the suction hole opened to the cylinder chamber.
• the space between the outlet of the suction hole and the outer peripheral surface of the roller can be increased, and this space can reduce the suction resistance of the gas fluid sucked into the cylinder chamber from the suction hole.
• the guide groove allows the suction gas fluid to be more smoothly guided to the low pressure chamber side. Therefore, the flow resistance can be further reduced, and the pressure loss of the suction gas fluid in the low-pressure chamber X can be further reduced.
• FIG. 1 is a cross-sectional view showing a main part of a rotary compressor according to a first embodiment of the present invention.
• FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.
• FIG. 3 is a cross-sectional view showing the second embodiment.
• FIG. 4 is a cross-sectional view showing the third embodiment.
• FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG.
• FIG. 6 is a transverse sectional view showing the fourth embodiment.
• FIG. 7 is a partially cutaway plan view showing the fifth embodiment.
• FIG. 8 is a partially omitted longitudinal sectional view showing the entire structure of the rotary compressor.
• FIG. 9 is a cross-sectional view showing a conventional example.
• a motor 2 is provided in an upper inside portion of a closed casing 1, and a compression element 4 rotationally driven by a drive shaft 3 extending from the motor 2 is provided below the motor 2. It is arranged.
• the compression element 4 includes a cylinder 5 having a cylinder chamber 51 therein, a closing member 6.6 composed of a front and a lid for closing both sides in the axial direction of the cylinder 5, and the drive shaft 3.
• a roller 7 is fitted to the eccentric shaft 31 and is provided inside the cylinder chamber 51.
• one end of the cylinder 5 is connected to a suction pipe 8 inserted from the outside of the closed casing 1 through an inlet tube 81, and the other end is connected to the cylinder 5.
• a suction hole 52 opening to the chamber 51 and a discharge hole 53 opening to the discharge space in the casing 1 are formed, and the suction hole 52 and the discharge hole 53 are provided between the suction hole 52 and the discharge hole 53.
• a blade 9 is provided for partitioning the interior of the cylinder chamber 51 into a low-pressure chamber X communicating with the suction hole 52 and a high-pressure chamber Y communicating with the discharge hole 53.
• the rotary compressor of the first embodiment shown in FIG. 1 constitutes an oscillating compressor in which the blade 9 can be oscillated. That is, the outer circumference of the roller 7 The base end side of the blade 9 is embedded in the portion to protrude radially outward. Between the suction hole 52 and the discharge hole 53 on the cylinder chamber side in the radial direction of the cylinder 5, the blade is provided.
• the cylindrical driving bush 10 having a receiving groove 10 a for receiving the protruding tip side of 9 freely reciprocatingly is held so as to be rotatable in the circumferential direction.
• the blade 9 By inserting the protruding tip side of the blade 9 back and forth, and swingably into the a, the blade 9 can be inserted into the receiving groove 10 O of the bundle 10 with the rotation drive of the II dynamic shaft 3.
• the roller 7 is revolved in the cylinder chamber 51 without rotating while the blade 9 is moved forward and backward with respect to a, and the blade 9 is moved relative to the cylinder 5 through the bush 10 without rotating.
• the blade 9 suctions the inside of the cylinder chamber 51. It is to be partitioned into a high pressure chamber Y communicating to 5 2 and the low pressure chamber X communicating with the discharge hole 5 3.
• the blade 9 since the blade 9 is coupled to the roller 7 and the roller 7, the revolving compression in which the protruding tip side of the blade 9 is always in contact with the outer peripheral surface of the roller 7.
• the high-pressure fluid in the high-pressure chamber Y can be more effectively prevented from leaking from the contact surface between the roller 7 and the blade 9 to the low-pressure chamber X, thereby increasing the compression efficiency. be able to.
• the blade 9 since the blade 9 does not slide on the outer peripheral surface of the roller 7, the power loss can be reduced by eliminating the friction loss between the roller 7 and the blade 9.
• the suction hole 52 is formed such that the center line a of the suction hole 52 at least on the opening side to the cylinder chamber 51 is the cylinder chamber. 51 is formed so as to be inclined in a direction approaching a tangent line b of an imaginary point intersecting with the center line a on the peripheral surface of FIG.
• the center line of the suction hole 52 is a
• the inside of the cylinder chamber 51 is
• the center line a of the suction hole 52 is the straight line
• the suction hole 52 is formed in the cylinder 5 so as to lie on the blade 9 side with respect to c and incline in a direction approaching the tangent line b.
• the center line a passing through the suction hole 52 is positioned on the inner peripheral surface of the cylinder chamber 51 where the suction hole 52 is formed.
• the suction gas fluid is Collides with the outer peripheral surface at an angle approaching a tangent to the outer peripheral surface without vertically hitting the outer peripheral surface. Therefore, the suction gas fluid after the collision is reflected in the rotation direction of the drive shaft 3, so that the suction gas fluid can smoothly flow into the low-pressure chamber X.
• the gas fluid can be smoothly introduced into the low pressure chamber X with low flow resistance, and the pressure loss of the suction gas fluid in the low pressure chamber X can be reduced.
• the shape of the suction hole 52 formed in the cylinder 5 is modified, and the center line d of the suction hole 52 on the suction pipe contact side is the cylinder chamber 5. 1 toward the center, the center line a of the suction hole 52 on the opening side to the cylinder chamber 51 intersects with the virtual center point a on the inner peripheral surface of the cylinder chamber 51.
• the suction hole 52 is formed by bending the suction hole 52 in the same plane so as to be inclined in a direction approaching the tangent line b, so as to solve a problem occurring in the first embodiment described later.
• the suction pipe 8 is connected to the inlet tube.
• the suction tube 52 is connected to the suction tube 52 by press-fitting and fixed in the direction of the center line a when reading the suction hole 52 through the valve 81, the flow resistance in the cylinder chamber 51 is reduced.
• the press-fitting in the direction of the center line a produces the effect of rotating the cylinder 5, generating a rotation moment, distorting parts, and displacing the assembly gap. Is likely to occur.
• the arrangement position of the blade 9 and the suction hole 52 come close to each other, and a space for bolting cannot be secured between the blade 9 and the suction hole 52.
• the center line d on the suction pipe connection side of the suction hole 52 is directed toward the inside of the cylinder, I :, and the cylinder chamber side opening of the suction hole 52 is formed.
• the suction pipe 8 is connected to the suction hole 52 via the inlet tube 81, the shape of the center line a in the shape close to the tangent b on the inner peripheral surface of the cylinder 5 is obtained. Since the inlet tube 81 can be press-fitted toward the center of the cylinder 5, a problem occurs when the above-described inlet tube 81 is press-fitted in the same direction as the center line a. Can be eliminated.
• a space can be secured between the inlet side of the suction hole 52 and the inlet side.
• a fixing bolt for connecting the closing member 6 and the cylinder 5 between the UI blade 9 and the suction hole 52 is provided.
• B can be arranged, and by cultivating the bolts B, it is possible to prevent leakage from between the end faces of the cylinder 5 and the closing member 6, and to attach the inlet tube 81 when press-fitting the inlet tube 81. Since the manual pipe 82 can be connected toward the center of the cylinder 5, the joint pipe generally used conventionally can be used in common, and the welding operation can be easily performed.
• the axial dimension of the cylinder 5 and the roller 7 is shortened so that the axial length of the compressor is reduced, or when the compressor is composed of a plurality of cylinders, the compressor is made flat.
• the diameter of the suction pipe 8 depends on the thickness of the cylinder 5, and the smaller the thickness is, the smaller the suction hole size is, which leads to pressure loss. 4.
• one side of each of the closing members 6, for example, the rear head of the lower closing member 6 is made thicker, and the suction passage is formed in the rear head 6.
• the center line a of the suction passage 61 is formed so as to be inclined in a direction approaching a tangent line b at the intersection of the inner peripheral surface of the cylinder chamber 51 and the center line a as shown in FIG. Yes, and as shown in FIG. 1 is inclined upward toward the cylinder chamber 51 of the cylinder 5, and the suction pipe 8 is connected to the outside of the suction passage 61 via the inlet tube 81.
• the suction hole 52 provided in the cylinder 5 is inclined in the direction in which the center line a approaches the tangent line b of the inner peripheral surface of the cylinder chamber 51, similarly to the suction passage 61.
• the suction hole 52 is directed downward so as to be continuous with the distal end of the suction passage 61.
• the suction pressure loss due to the restriction of the suction hole size can be avoided: That is, with the above configuration, the diameter of the suction passage 61 is sufficiently large regardless of the thickness of the cylinder 5.
• the suction gas fluid since the suction gas fluid is inclined from the suction hole 52, the suction gas fluid flows from the suction passage 61 to the low-pressure chamber X in the cylinder chamber 51 via the suction hole 52. Flow resistance can be introduced smoothly with a small amount, and the pressure loss of the suction gas fluid in the low-pressure chamber X can be reduced, while the shortage of the suction amount of the gas fluid into the cylinder chamber 51 can be avoided. It is.
• the above-described configuration allows the suction chamber 61 to move from the suction passage 61 to the cylinder chamber 51 via the suction hole 52 of the cylinder 5.
• the flow resistance is introduced into the low-pressure chamber X with low flow resistance, the pressure loss in the low-pressure chamber X can be reduced, and the shortage of the gas fluid suction into the cylinder chamber 51 can be avoided. It is.
• the blade 9 is integrally formed on a part of the outer peripheral surface of the roller 7 so as to protrude.
• the suction pipe 8 when the structure in which the suction pipe 8 is connected to the closing member 6 in the case where the axial dimension of the cylinder 5 and the roller 7 is formed short, as in the fourth embodiment shown in FIG.
• the center line on the inlet side communicating with the suction pipe 8 in the suction passage 61 formed at the center faces the center of the cylinder chamber 51, and the center line on the continuous side to the suction hole 52 in the suction passage 61 is
• the suction hole 52 is formed so as to be inclined in the same direction as the center line on the opening side of the cylinder chamber 51 to the cylinder chamber 51. In this way, as in the second embodiment, the suction pipe 8 can be connected to the center of the cylinder 5 via the inlet tube 81.
• a required amount of gas fluid corresponding to the volume of the cylinder chamber 51 is supplied from the suction pipe 8 to the suction passage 61.
• a low flow resistance is introduced into the low-pressure chamber X in the cylinder chamber 51 through the suction hole 52 to reduce the pressure loss in the low-pressure chamber X while distorting parts and shifting the assembly gap.
• a space for bolting is secured between the arrangement position of the blade 9 and the inlet side of the suction hole 52, thereby preventing leakage.
• the suction passage 61 is formed in the lid of the lower-side closing member 6.
• the suction passage 61 is formed in the front head of the upper-side closing member 6.
• the suction passage 6 may be formed in the dollar plate.
• the oscillating rotary compressor has been described.
• the roller 7 is oscillated by the oscillating motion of the blade 9 on the base constituted by the oscillating rotary compressor. Does not rotate, the position of the portion facing the suction hole 52 does not fluctuate. Therefore, by utilizing the revolving motion of the roller 7, as shown in FIG.
• An arc-shaped guide groove 7 for smoothly guiding the suction gas introduced from the suction hole 52 to the low-pressure chamber X is provided on a portion of the outer peripheral surface of the ring 7 facing the suction hole 52 provided in the ring 5. It is preferred that 1 be recessed.
• the space between the outlet of the suction hole 52 and the outer peripheral surface of the roller 7 can be increased, and this space reduces the suction resistance of the gas fluid sucked into the cylinder chamber 51 from the suction hole 52. Since the suction gas fluid sucked into the cylinder chamber 51 from the suction hole 52 can be smoothly guided to the low-pressure chamber X through the arc-shaped guide groove 71, the cylinder can be made smaller. The flow resistance of the gas fluid sucked into the chamber 51 can be further reduced, The pressure loss of the gas fluid in the low-pressure chamber X can be further reduced: In the embodiment of FIG. 7, the guide for guiding the gas fluid sucked from the suction hole 52 to the outer periphery of the roller 7 is provided.
• the groove 71 is recessed, it is necessary to use a swing type. However, in the above-described first to fourth embodiments, it is not always necessary to use a swing type. Good. Further, in the third and fourth embodiments, the cylinder 5 and the roller 7 are formed flat, but when the suction pipe 8 is connected to the closing member 6, the cylinder 5 and the roller 7 does not necessarily have to be flat.
• the rotary compressor of the present invention is mainly used for a refrigeration system.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Applications Or Details Of Rotary Compressors (AREA)
• Rotary Pumps (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=18255412

Family Applications (1)

Country Status (9)

Cited By (1)

Families Citing this family (5)

Citations (4)

Family Cites Families (3)

• 1994
  • 1994-12-07 SG SG1996005992A patent/SG45400A1/en unknown
  • 1994-12-07 DK DK95902916T patent/DK0686772T3/da active
  • 1994-12-07 DE DE69409508T patent/DE69409508T2/de not_active Expired - Fee Related
  • 1994-12-07 KR KR1019950703562A patent/KR100322270B1/ko not_active IP Right Cessation
  • 1994-12-07 CN CN94191269A patent/CN1042851C/zh not_active Expired - Fee Related
  • 1994-12-07 EP EP95902916A patent/EP0686772B1/de not_active Expired - Lifetime
  • 1994-12-07 ES ES95902916T patent/ES2116065T3/es not_active Expired - Lifetime
  • 1994-12-07 WO PCT/JP1994/002052 patent/WO1995018309A1/ja active IP Right Grant
  • 1994-12-23 MY MYPI94003492A patent/MY115326A/en unknown

Patent Citations (4)

Non-Patent Citations (1)

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