In a preferred embodiment, linear stepper motor, comprising; an annular stator structure; an axially extending, cylindrical, permanent magnet shaft extending coaxially through said annular stator structure; and the axially extending, cylindrical, permanent magnet shaft having a smooth external surfa
In a preferred embodiment, linear stepper motor, comprising; an annular stator structure; an axially extending, cylindrical, permanent magnet shaft extending coaxially through said annular stator structure; and the axially extending, cylindrical, permanent magnet shaft having a smooth external surface along a portion thereof with axially alternating N and S poles defined circumferentially in an outer periphery of the portion of the axially extending, cylindrical, permanent magnet shaft. The present invention also provides a method of magnetizing the shaft of such a motor and a fixture and method of manufacturing the fixture therefor.
대표청구항▼
1. A linear stepper motor, comprising:(a) an annular stator structure;(b) an axially extending, cylindrical, permanent magnet shaft extending coaxially through said annular stator structure;(c) said axially extending, cylindrical, permanent magnet shaft having a smooth external surface along a porti
1. A linear stepper motor, comprising:(a) an annular stator structure;(b) an axially extending, cylindrical, permanent magnet shaft extending coaxially through said annular stator structure;(c) said axially extending, cylindrical, permanent magnet shaft having a smooth external surface along a portion thereof with axially alternating N and S poles defined circumferentially in an outer periphery of said portion of said axially extending, cylindrical, smooth, permanent magnet shaft;(d) said portion of said axially extending, cylindrical, permanent magnet shaft has a solid core;(e) said solid core is formed from a non-magnetic material; and(f) said stator structure includes annular disks of a high lubricity material spacing apart elements of said stator structure and serving as bearing surfaces for said axially extending shaft. 2. A linear stepper motor, as defined in claim 1, wherein: said axially extending, cylindrical, smooth, permanent magnet shaft can rotate 360° continuously or intermittently in any direction, regardless of whether or not said linear stepper motor is energized. 3. A linear stepper motor, as defined in claim 1, wherein: said axially extending, cylindrical, smooth, permanent magnet shaft is back-driveable. 4. A linear stepper motor, as defined in claim 1, wherein: said linear stepper motor is constructed to operate in any orientation. 5. A linear stepper motor, as defined in claim 1, wherein: said stator structure has modular stator stacks with pole pieces to concentrate and direct magnetic flux. 6. A linear stepper motor as defined in claim 1, wherein: said stator structure has conventionally wound coils. 7. A linear stepper motor, as defined in claim 1, wherein: said linear stepper motor includes no lead screw and no ball screw. 8. A linear stepper motor, as defined in claim 1, wherein: said linear stepper motor requires no lubrication of coengaged parts thereof. 9. A linear stepper motor, as defined in claim 1, wherein: said linear stepper motor requires no conversion of rotary motion to linear motion. 10. A linear stepper motor, comprising;(a) an annular stator structure;(b) an axially extending, cylindrical, permanent magnet shaft extending coaxially through said annular stator structure;(c) said axially extending, cylindrical, permanent magnet shaft having a smooth external surface along a portion thereof with axially alternating N and S poles defined circumferentially in an outer periphery of said portion of said axially extending, cylindrical, smooth, permanent magnet shaft; and(d) said stator structure includes annular disks of a high lubricity material spacing apart elements of said stator structure and serving as bearing surfaces for said axially extending shaft. 11. A linear stepper motor, as defined in claim 10, wherein: said portion of said axially extending, cylindrical, permanent magnet shaft is hollow. 12. A linear stepper motor, as defined in claim 10, wherein: said axially extending, cylindrical, smooth, permanent magnet shaft can rotate 360° continuously or intermittently in any direction, regardless of whether or not said linear stepper motor is energized. 13. A linear stepper motor, as defined in claim 10, wherein: said axially extending, cylindrical, smooth, permanent magnet shaft is back-driveable. 14. A linear stepper motor, as defined in claim 10, wherein: said linear stepper motor is constructed to operate in any orientation. 15. A linear stepper motor, as defined in claim 10, wherein: said stator structure has modular stator stacks with pole pieces to concentrate and direct magnetic flux. 16. A linear stepper motor as defined in claim 10, wherein: said stator structure has conventionally wound coils. 17. A linear stepper motor, as defined in claim 10, wherein: said linear stepper motor includes no lead screw and no ball screw. 18. A linear stepper motor, as defined in claim 10, wherein: said linear stepper motor requires no lubrication of coengaged parts thereof. 19. A l inear stepper motor, as defined in claim 10, wherein: said linear stepper motor requires no conversion of rotary motion to linear motion.
Lee J. Kelly (Rochester NY) Reznik Svetlana (Rochester NY) Furlani Edward P. (Lancaster NY), Apparatus and system for magnetization of permanent magnet cylinder elements.
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Jaworek, Gary S.; Koch, Jr., Robert L.; Auld, Michael D.; Kimsey, John S.; Baber, Daniel L.; Leimbach, Richard L.; Ulrich, Daniel J., Articulatable surgical instruments with conductive pathways for signal communication.
Shelton, IV, Frederick E.; Morgan, Jerome R.; Yates, David C.; Baxter, III, Chester O.; Beckman, Andrew T., Charging system that enables emergency resolutions for charging a battery.
Leimbach, Richard L.; Shelton, IV, Frederick E.; Morgan, Jerome R.; Schellin, Emily A., End effector detection and firing rate modulation systems for surgical instruments.
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Shelton, IV, Frederick E.; Overmyer, Mark D.; Yates, David C.; Harris, Jason L., Mechanisms for compensating for drivetrain failure in powered surgical instruments.
Swayze, Jeffrey S.; Hueil, Joseph C.; Morgan, Jerome R.; Shelton, IV, Frederick E., Stapling assembly configured to produce different formed staple heights.
Beckman, Andrew T.; Nalagatla, Anil K.; Hibner, John A.; Shelton, IV, Frederick E., Surgical apparatus configured to assess whether a performance parameter of the surgical apparatus is within an acceptable performance band.
Beckman, Andrew T.; Nalagatla, Anil K.; Koch, Jr., Robert L.; Hibner, John A.; Shelton, IV, Frederick E., Surgical apparatus configured to track an end-of-life parameter.
Shelton, IV, Frederick E.; Swayze, Jeffrey S.; Baxter, III, Chester O., Surgical fastening apparatus with a rotary end effector drive shaft for selective engagement with a motorized drive system.
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Overmyer, Mark D.; Auld, Michael D.; Adams, Shane R.; Shelton, IV, Frederick E.; Harris, Jason L., Surgical instrument comprising a lockable battery housing.
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Shelton, IV, Frederick E.; Baxter, III, Chester O., Surgical instrument with an anvil that is selectively movable about a discrete non-movable axis relative to a staple cartridge.
Hunter, Morgan R.; Schultz, Darwin L.; Worthington, Sarah A.; Shelton, IV, Frederick E.; Weaner, Lauren S.; Vendely, Michael J., Surgical instrument with articulating and axially translatable end effector.
Hunter, Morgan R.; Schultz, Darwin L.; Dunki-Jacobs, Adam R.; Baxter, III, Chester O.; Swayze, Jeffrey S., Surgical instruments with tensioning arrangements for cable driven articulation systems.
Overmyer, Mark D.; Yates, David C.; Shelton, IV, Frederick E.; Adams, Shane R.; Leimbach, Richard L., Surgical stapler having motor control based on an electrical parameter related to a motor current.
Shelton, IV, Frederick E.; Setser, Michael E.; Weisenburgh, II, William B., Surgical stapling instrument with lockout features to prevent advancement of a firing assembly unless an unfired surgical staple cartridge is operably mounted in an end effector portion of the instrument.
Shelton, IV, Frederick E.; Harris, Jason L.; Swensgard, Brett E.; Leimbach, Richard L.; Adams, Shane R.; Overmyer, Mark D., Time dependent evaluation of sensor data to determine stability, creep, and viscoelastic elements of measures.
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