US20110280754A1 - Cam-type pump structure for a refrigerant recycling machine - Google Patents
Cam-type pump structure for a refrigerant recycling machine Download PDFInfo
- Publication number
- US20110280754A1 US20110280754A1 US12/781,051 US78105110A US2011280754A1 US 20110280754 A1 US20110280754 A1 US 20110280754A1 US 78105110 A US78105110 A US 78105110A US 2011280754 A1 US2011280754 A1 US 2011280754A1
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- US
- United States
- Prior art keywords
- cam
- type pump
- recycling machine
- pump structure
- main body
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0413—Cams
Definitions
- the present invention relates to a cam-type pump structure for a refrigerant recycling machine.
- a pump apparatus uses a cam-type structure for pistons to be reciprocated in the same direction or in opposite directions so as to pump refrigerant.
- Refrigerant is widely used in our daily living, such as domestic refrigerators, air conditioners, refrigerating equipment or car air conditioners.
- refrigerators or air conditioners need maintenance, it is required to drain out the refrigerant. This not only pollutes the ambient air but also brings poisonous substances to harm the human body when the refrigerant is burned at a high temperature.
- the existing refrigerant recycling machine doesn't have a proper design for its inside construction. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to improve the existing products.
- the primary object of the present invention is to provide a cam-type pump structure for a refrigerant recycling machine, which comprises two pairs of pistons and cylinders.
- the two pistons are driven by a cam device.
- the cam device When the cam device is activated, the two pistons are reciprocated synchronously.
- the pistons are reciprocated in the same direction or in opposite directions.
- the present invention provides a high efficiency and is compact in size.
- the present invention comprises a main body.
- the main body comprises a motor at one end thereof.
- the motor has an output end which is a shaft.
- the main body has a space therein.
- the shaft of the motor is disposed in the space.
- a cam device is inserted on the shaft.
- the cam device comprises a central rotating body and two eccentric rotating bodies at two sides of the central rotating body.
- a bearing is provided at an outer end of each of the eccentric rotating bodies.
- An outer sleeve is provided at an outer end of the bearing.
- the outer sleeve has a protrusion at one end thereof and a piston at a distal end of the protrusion.
- the main body has a pair of openings at two sides thereof. Each opening is connected with a cylinder.
- the cylinder has a chamber therein to receive the piston for reciprocation.
- a fan is provided at an outer end of the motor to lower the temperature and dissipate the heat when in operation.
- the main body has a ring portion at an outer edge of the space.
- the ring portion is covered with a plate to seal the space.
- each cylinder is connected with a valve body.
- the inside of the cylinder communicates with the inside of the valve body.
- the valve body has an inlet and an outlet.
- the piston is reciprocated in the cylinder to form pressure for the valve body to provide a pump function.
- the center of the central rotating body of the cam device is formed with an axial hole for insertion of the shaft of the motor.
- the axial hole penetrates each eccentric rotating body and isn't located at the center of each eccentric rotating body.
- the centers of the two eccentric rotating bodies are located at different axes.
- the two eccentric rotating bodies When the shaft is turned to drive the central rotating body, the two eccentric rotating bodies will be turned eccentrically at different angles and the two pistons at the two sides of the cam device will be reciprocated in opposite directions. In this way, the two valve bodies are to pump synchronously, providing a better pump function.
- the centers of the two eccentric rotating bodies are located at the same axis.
- the two eccentric rotating bodies When the shaft is turned to drive the central rotating body, the two eccentric rotating bodies will be turned eccentrically at the same angle and the two pistons at the two sides of the cam device are reciprocated in the same direction. In this way, the two valve bodies are to pump in turn, providing a smooth operation.
- FIG. 1 is a perspective view of the present invention
- FIG. 2 is an exploded view of the present invention
- FIG. 3 is an exploded view of a cam device of the present invention
- FIG. 4 is a cross-sectional showing the cam device of the present invention in an operating status
- FIG. 5 is another cross-sectional showing the cam device of the present invention in an operating status
- FIG. 6 is an exploded view of a cam device according to another embodiment of the present invention.
- FIG. 7 is a cross-sectional view of FIG. 6 showing the cam device of the present invention in an operating status.
- a cam-type pump structure for a refrigerant recycling machine comprises a main body 1 , a cam device 2 , a cylinder 3 and a valve body 4 .
- the main body 1 has a casing shape and comprises a motor 11 at one end thereof.
- a fan 12 is provided at an outer side of the motor 11 .
- the motor 11 has an output end which is a shaft 14 .
- the main body 1 has a space 13 therein.
- the shaft 14 of the motor 11 is disposed in the space 13 .
- the cam device 2 is inserted on the shaft 14 .
- a distal end of the shaft 14 is provided with a shaft bearing 141 .
- the main body 1 has a pair of openings 15 at two sides thereof to receive the cylinder 3 .
- the main body 1 has a ring portion 16 at an outer edge of the space 13 .
- the main body 1 further comprises a plate 17 and a rubber washer 171 associated with an oil seal ring 161 to seal the space 13 .
- the plate 17 and the rubber washer 171 are connected to the ring portion 16 with screws 172 .
- the cam device 2 comprises a central rotating body 21 , a pair of eccentric rotating bodies 22 at two sides of the central rotating body 21 , a pair of bearings 24 next to the pair of eccentric rotating bodies 22 and a pair of outer sleeves 25 next to the pair of the bearings 24 .
- Each outer sleeve 25 has a protrusion 26 at one end thereof and a piston 27 at a distal end of the protrusion 26 .
- the cam device 2 has an axial hole 23 along a central axis thereof. In this embodiment, the axial hole 23 penetrates through the center of the central rotating body 21 , but not through the center of each eccentric rotating body 22 .
- the cylinder 3 is coupled to the opening 15 of the main body 1 .
- the cylinder 3 has a chamber 31 therein to receive the piston 27 for reciprocating motion.
- the valve body 4 is mounted on the cylinder 3 .
- the inside of the cylinder 3 communicates with the inside of the valve body 4 .
- the valve body 4 has an inlet 41 and an outlet 42 .
- the piston 27 is reciprocated in the cylinder 3 to form pressure for the valve body 4 to provide a pump function.
- the shaft 14 When the motor 11 is started, the shaft 14 will be driven to turn the cam device 2 on the shaft 14 .
- the central rotating body 21 and the two eccentric rotating bodies 22 are turned synchronously. Because the axial hole 23 is not disposed at the center of each eccentric rotating body 22 , the cam device 2 is turned eccentrically.
- the two eccentric rotating bodies 22 are in an eccentric motion, and the two pistons 27 at the two sides of the cam device 2 are reciprocated in opposite directions, namely, they are synchronously turned inward or outward, such that the two valve bodies 4 are to pump synchronously. In this motion way, the two valve bodies 4 provide more efficiency to pump than a single piston with a single valve.
- FIG. 6 shows a second embodiment of the present invention, which is substantially similar to the first embodiment with the exceptions described hereinafter.
- a cam device 5 comprises a central rotating body 51 , a pair of eccentric rotating bodies 52 at two sides of the central rotating body 51 , a pair of bearings 54 next to the pair of eccentric rotating bodies 52 and a pair of outer sleeves 55 next to the pair of the bearings 54 .
- Each outer sleeve 55 has a protrusion 56 at one end thereof and a piston 57 at a distal end of the protrusion 56 .
- the cam device 5 has an axial hole 53 along a central axis thereof. In this embodiment, the axial hole 53 penetrates through the center of the central rotating body 51 , but not through the center of each eccentric rotating body 52 .
- the centers of the two eccentric rotating bodies 52 are located at the same axis, namely, the two eccentric rotating bodies 52 are eccentric toward the same side relative to the axial hole 53 simultaneously.
- the central rotating body 51 has an engaging groove 511 on one side thereof and a threaded hole 512 in the engaging groove 511 .
- the engaging groove 511 is adapted to receive a rib 581 of a counterweight block 58 .
- the counterweight block 58 has a hole 582 thereon for insertion of a screw 583 , such that the counterweight block 58 is coupled to the central rotating body 51 . Because the two eccentric rotating bodies 52 are eccentric toward the same side relative to the axial hole 53 simultaneously, the two eccentric rotating bodies 52 will be turned eccentrically when the shaft 14 is turned. In order to solve this problem, in this embodiment the counterweight block 58 is located at an opposite side relative to the eccentric rotating bodies 52 for balance.
- the shaft 14 When the motor 11 is started, the shaft 14 will be driven to turn the cam device 5 on the shaft 14 .
- the central rotating body 51 and the two eccentric rotating bodies 52 are turned synchronously. Because the axial hole 53 is not disposed at the center of each eccentric rotating body 52 , the cam device 5 is turned eccentrically.
- the centers of the two eccentric rotating bodies 52 are located at the same axis, and the two pistons 57 at the two sides of the cam device 5 are reciprocated in the same direction, namely, one piston 57 is turned inward and the other piston 57 is turned outward, such that the two valve bodies 4 are to pump in turn. In this motion way, the motion directions of the cam device 5 and the piston 57 are the same, providing a smooth operation.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
A cam-type pump structure for a refrigerant recycling machine includes a cam device driven by a motor for pistons to be reciprocated in conjunction with cylinders and valve bodies so as to pump liquid. The pump apparatus is compact in size and has high efficiency for the demand of recycling refrigerant.
Description
- 1. Field of the Invention
- The present invention relates to a cam-type pump structure for a refrigerant recycling machine. In particular, a pump apparatus uses a cam-type structure for pistons to be reciprocated in the same direction or in opposite directions so as to pump refrigerant.
- 2. Description of the Prior Art
- Refrigerant is widely used in our daily living, such as domestic refrigerators, air conditioners, refrigerating equipment or car air conditioners. When refrigerators or air conditioners need maintenance, it is required to drain out the refrigerant. This not only pollutes the ambient air but also brings poisonous substances to harm the human body when the refrigerant is burned at a high temperature. Recently, there is a refrigerant recycling machine on the market to pump the refrigerant or the like into a specific container, which conforms to the operation safety and protects the global environment.
- The existing refrigerant recycling machine doesn't have a proper design for its inside construction. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to improve the existing products.
- The primary object of the present invention is to provide a cam-type pump structure for a refrigerant recycling machine, which comprises two pairs of pistons and cylinders. The two pistons are driven by a cam device. When the cam device is activated, the two pistons are reciprocated synchronously. The pistons are reciprocated in the same direction or in opposite directions. By the motion of the pistons, the present invention provides a high efficiency and is compact in size.
- In order to achieve the object, the present invention comprises a main body. The main body comprises a motor at one end thereof. The motor has an output end which is a shaft. The main body has a space therein. The shaft of the motor is disposed in the space. A cam device is inserted on the shaft. The cam device comprises a central rotating body and two eccentric rotating bodies at two sides of the central rotating body. A bearing is provided at an outer end of each of the eccentric rotating bodies. An outer sleeve is provided at an outer end of the bearing. The outer sleeve has a protrusion at one end thereof and a piston at a distal end of the protrusion. The main body has a pair of openings at two sides thereof. Each opening is connected with a cylinder. The cylinder has a chamber therein to receive the piston for reciprocation.
- Preferably, a fan is provided at an outer end of the motor to lower the temperature and dissipate the heat when in operation.
- Preferably, the main body has a ring portion at an outer edge of the space. The ring portion is covered with a plate to seal the space.
- Preferably, each cylinder is connected with a valve body. The inside of the cylinder communicates with the inside of the valve body. The valve body has an inlet and an outlet. The piston is reciprocated in the cylinder to form pressure for the valve body to provide a pump function.
- Preferably, the center of the central rotating body of the cam device is formed with an axial hole for insertion of the shaft of the motor. The axial hole penetrates each eccentric rotating body and isn't located at the center of each eccentric rotating body.
- Preferably, the centers of the two eccentric rotating bodies are located at different axes. When the shaft is turned to drive the central rotating body, the two eccentric rotating bodies will be turned eccentrically at different angles and the two pistons at the two sides of the cam device will be reciprocated in opposite directions. In this way, the two valve bodies are to pump synchronously, providing a better pump function.
- Alternatively, the centers of the two eccentric rotating bodies are located at the same axis. When the shaft is turned to drive the central rotating body, the two eccentric rotating bodies will be turned eccentrically at the same angle and the two pistons at the two sides of the cam device are reciprocated in the same direction. In this way, the two valve bodies are to pump in turn, providing a smooth operation.
-
FIG. 1 is a perspective view of the present invention; -
FIG. 2 is an exploded view of the present invention; -
FIG. 3 is an exploded view of a cam device of the present invention; -
FIG. 4 is a cross-sectional showing the cam device of the present invention in an operating status; -
FIG. 5 is another cross-sectional showing the cam device of the present invention in an operating status; -
FIG. 6 is an exploded view of a cam device according to another embodiment of the present invention; and -
FIG. 7 is a cross-sectional view ofFIG. 6 showing the cam device of the present invention in an operating status. - Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
- As shown in
FIGS. 1 to 4 , a cam-type pump structure for a refrigerant recycling machine according to a first preferred embodiment of the present invention comprises amain body 1, acam device 2, acylinder 3 and avalve body 4. - The
main body 1 has a casing shape and comprises amotor 11 at one end thereof. Afan 12 is provided at an outer side of themotor 11. Themotor 11 has an output end which is ashaft 14. Themain body 1 has aspace 13 therein. Theshaft 14 of themotor 11 is disposed in thespace 13. Thecam device 2 is inserted on theshaft 14. A distal end of theshaft 14 is provided with a shaft bearing 141. Themain body 1 has a pair ofopenings 15 at two sides thereof to receive thecylinder 3. Themain body 1 has aring portion 16 at an outer edge of thespace 13. Themain body 1 further comprises aplate 17 and arubber washer 171 associated with anoil seal ring 161 to seal thespace 13. Theplate 17 and therubber washer 171 are connected to thering portion 16 withscrews 172. - The
cam device 2 comprises a centralrotating body 21, a pair of eccentricrotating bodies 22 at two sides of the centralrotating body 21, a pair ofbearings 24 next to the pair of eccentricrotating bodies 22 and a pair ofouter sleeves 25 next to the pair of thebearings 24. Eachouter sleeve 25 has aprotrusion 26 at one end thereof and apiston 27 at a distal end of theprotrusion 26. Thecam device 2 has anaxial hole 23 along a central axis thereof. In this embodiment, theaxial hole 23 penetrates through the center of the centralrotating body 21, but not through the center of each eccentricrotating body 22. - The
cylinder 3 is coupled to theopening 15 of themain body 1. Thecylinder 3 has achamber 31 therein to receive thepiston 27 for reciprocating motion. Preferably, there are twoopenings 15 in this embodiment, so thecylinder 3 corresponds in number to theopening 15. - The
valve body 4 is mounted on thecylinder 3. The inside of thecylinder 3 communicates with the inside of thevalve body 4. Thevalve body 4 has aninlet 41 and anoutlet 42. Thepiston 27 is reciprocated in thecylinder 3 to form pressure for thevalve body 4 to provide a pump function. - When the
motor 11 is started, theshaft 14 will be driven to turn thecam device 2 on theshaft 14. The centralrotating body 21 and the two eccentricrotating bodies 22 are turned synchronously. Because theaxial hole 23 is not disposed at the center of each eccentricrotating body 22, thecam device 2 is turned eccentrically. As shown inFIG. 4 andFIG. 5 , the two eccentricrotating bodies 22 are in an eccentric motion, and the twopistons 27 at the two sides of thecam device 2 are reciprocated in opposite directions, namely, they are synchronously turned inward or outward, such that the twovalve bodies 4 are to pump synchronously. In this motion way, the twovalve bodies 4 provide more efficiency to pump than a single piston with a single valve. -
FIG. 6 shows a second embodiment of the present invention, which is substantially similar to the first embodiment with the exceptions described hereinafter. Acam device 5 comprises a centralrotating body 51, a pair of eccentricrotating bodies 52 at two sides of the centralrotating body 51, a pair ofbearings 54 next to the pair of eccentricrotating bodies 52 and a pair ofouter sleeves 55 next to the pair of thebearings 54. Eachouter sleeve 55 has aprotrusion 56 at one end thereof and apiston 57 at a distal end of theprotrusion 56. Thecam device 5 has anaxial hole 53 along a central axis thereof. In this embodiment, theaxial hole 53 penetrates through the center of the centralrotating body 51, but not through the center of each eccentricrotating body 52. In particular, the centers of the two eccentricrotating bodies 52 are located at the same axis, namely, the two eccentricrotating bodies 52 are eccentric toward the same side relative to theaxial hole 53 simultaneously. In addition, the centralrotating body 51 has an engaginggroove 511 on one side thereof and a threadedhole 512 in the engaginggroove 511. The engaginggroove 511 is adapted to receive arib 581 of acounterweight block 58. Thecounterweight block 58 has ahole 582 thereon for insertion of ascrew 583, such that thecounterweight block 58 is coupled to the centralrotating body 51. Because the two eccentricrotating bodies 52 are eccentric toward the same side relative to theaxial hole 53 simultaneously, the two eccentricrotating bodies 52 will be turned eccentrically when theshaft 14 is turned. In order to solve this problem, in this embodiment thecounterweight block 58 is located at an opposite side relative to the eccentricrotating bodies 52 for balance. - When the
motor 11 is started, theshaft 14 will be driven to turn thecam device 5 on theshaft 14. The centralrotating body 51 and the two eccentricrotating bodies 52 are turned synchronously. Because theaxial hole 53 is not disposed at the center of each eccentricrotating body 52, thecam device 5 is turned eccentrically. As shown inFIG. 7 , the centers of the two eccentricrotating bodies 52 are located at the same axis, and the twopistons 57 at the two sides of thecam device 5 are reciprocated in the same direction, namely, onepiston 57 is turned inward and theother piston 57 is turned outward, such that the twovalve bodies 4 are to pump in turn. In this motion way, the motion directions of thecam device 5 and thepiston 57 are the same, providing a smooth operation. - Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.
Claims (10)
1. A cam-type pump structure for a refrigerant recycling machine, comprising a main body, a cam device and a cylinder;
the main body comprising a motor, the motor having an output end provided with a shaft, the main body having a space therein, the shaft of the motor being disposed in the space, the cam device being inserted on the shaft, the main body having an opening at one side thereof;
the cam device comprising a central rotating body and two eccentric rotating bodies, each of the two eccentric rotating bodies being connected with a piston, the cam device having an axial hole along a central axis thereof, the shaft being inserted through the axial hole and the eccentric rotating bodies; and
the cylinder being coupled to the opening of the main body, the cylinder having a chamber therein to receive the piston for reciprocation.
2. The cam-type pump structure for a refrigerant recycling machine as claimed in claim 1 , wherein the main body has a casing shape, a fan being provided at an outer side of the motor, the main body having a ring portion at an outer edge of the space, the main body further comprising a plate and a rubber washer associated with an oil seal ring to seal the space, the plate and the rubber washer being connected to the ring portion with screws.
3. The cam-type pump structure for a refrigerant recycling machine as claimed in claim 1 , wherein a distal end of the shaft is provided with a shaft bearing.
4. The cam-type pump structure for a refrigerant recycling machine as claimed in claim 1 , wherein the two eccentric rotating bodies of the cam device are located at two sides of the central rotating body.
5. The cam-type pump structure for a refrigerant recycling machine as claimed in claim 1 , wherein a bearing is provided at an outer end of each of the eccentric rotating bodies, an outer sleeve being provided at an outer end of the bearing, the outer sleeve having a protrusion at one end thereof, the piston being located at a distal end of the protrusion.
6. The cam-type pump structure for a refrigerant recycling machine as claimed in claim 1 , wherein the axial hole is located at the center of the central rotating body.
7. The cam-type pump structure for a refrigerant recycling machine as claimed in claim 1 , wherein the cylinder is connected with a valve body, the inside of the cylinder communicating with the inside of the valve body, the valve body having an inlet and an outlet.
8. The cam-type pump structure for a refrigerant recycling machine as claimed in claim 1 , wherein the centers of the two eccentric rotating bodies are located at different axes.
9. The cam-type pump structure for a refrigerant recycling machine as claimed in claim 1 , wherein the centers of the two eccentric rotating bodies are located at the same axis.
10. The cam-type pump structure for a refrigerant recycling machine as claimed in claim 9 , wherein one side of the central rotating body is provided with a counterweight block, the counterweight block being located at an opposite side relative to the eccentric rotating bodies for balance, the side of the central rotating body having an engaging groove and a threaded hole in the engaging groove, the engaging groove being adapted to receive a rib of the counterweight block, the counterweight block having a hole thereon for insertion of a screw so that the counterweight block is coupled to the central rotating body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/781,051 US20110280754A1 (en) | 2010-05-17 | 2010-05-17 | Cam-type pump structure for a refrigerant recycling machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/781,051 US20110280754A1 (en) | 2010-05-17 | 2010-05-17 | Cam-type pump structure for a refrigerant recycling machine |
Publications (1)
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US20110280754A1 true US20110280754A1 (en) | 2011-11-17 |
Family
ID=44911948
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/781,051 Abandoned US20110280754A1 (en) | 2010-05-17 | 2010-05-17 | Cam-type pump structure for a refrigerant recycling machine |
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US (1) | US20110280754A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140212299A1 (en) * | 2011-12-16 | 2014-07-31 | Rolls-Royce Plc | Propulsion engine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2071870A (en) * | 1935-09-03 | 1937-02-23 | Solar Ind Inc | Motor compressor unit |
US6132177A (en) * | 1997-08-14 | 2000-10-17 | Bristol Compressors, Inc. | Two stage reciprocating compressors and associated HVAC systems and methods |
-
2010
- 2010-05-17 US US12/781,051 patent/US20110280754A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2071870A (en) * | 1935-09-03 | 1937-02-23 | Solar Ind Inc | Motor compressor unit |
US6132177A (en) * | 1997-08-14 | 2000-10-17 | Bristol Compressors, Inc. | Two stage reciprocating compressors and associated HVAC systems and methods |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140212299A1 (en) * | 2011-12-16 | 2014-07-31 | Rolls-Royce Plc | Propulsion engine |
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Owner name: SUN-WONDER INDUSTRIAL CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHANG, AN CHAO;REEL/FRAME:024392/0923 Effective date: 20100331 |
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STCB | Information on status: application discontinuation |
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