[특허]Concentric shaft split timing screw system

LIGHTHOUSE INSTRUMENTS, LLC.

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Concentric shaft split timing screw system

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65G-033/04 B65G-047/30
출원번호	US-0391443 (2016-12-27)
등록번호	US-10059528 (2018-08-28)
발명자 / 주소	Timmins, Michael A. Griffith, Warren Hughes, Roy
출원인 / 주소	LIGHTHOUSE INSTRUMENTS, LLC.
대리인 / 주소	Greenblum & Bernstein, P.L.C.
인용정보	피인용 횟수 : 0 인용 특허 : 13

초록
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A split shaft screw system includes a screw configured to convey an article along a movement path. The screw includes a plurality of threads, each thread having a crest, a root and a pair of sidewalls, wherein the root and pair of sidewalls are configured to capture the article. Provided are a first screw segment connected to a first drive shaft configured to be driven by a first motor, and a second screw segment immediately adjacent to the first screw segment and connected to a second drive shaft concentric to the first drive shaft, the second drive sha...

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1. A split shaft screw system comprising: a guide;a screw configured to convey an article along a movement path and against the guide, the screw comprising: a plurality of threads, each thread having a crest, a root and a pair of sidewalls, wherein the root and pair of sidewalls are configured to capture the article;a first screw segment connected to a first drive shaft configured to be driven by a first motor; anda second screw segment immediately adjacent to the first screw segment and connected to a second drive shaft concentric to the first drive shaft, the second drive shaft configured to be driven by a second motor independently of the driving of the first screw segment; anda frame configured to hold both ends of the screw, wherein the first motor and second motor are affixed to the frame at a same downstream end of the screw. 2. The split shaft screw system according to claim 1, wherein: the first screw segment is positioned upstream of the second screw segment along the movement path; andthe first drive shaft is rotatable within the second drive shaft. 3. The split shaft screw system according to claim 1, wherein the second screw segment abuts against the first screw segment. 4. The split shaft screw system according to claim 1, wherein: a thickness of the thread crests on the first screw segment increases downstream along the movement path; anda thickness of the thread crests on the second screw are constant along the movement path. 5. The split shaft screw system according to claim 1, wherein the first and second motors are servo motors. 6. A split shaft screw system comprising: a guide;a screw configured to convey an article along a movement path and against the guide, the screw comprising: a plurality of threads, each thread having a crest, a root and a pair of sidewalls, wherein the root and pair of sidewalls are configured to capture the article;a first screw segment connected to a first drive shaft configured to be driven by a first motor; anda second screw segment immediately adjacent to the first screw segment and connected to a second drive shaft concentric to the first drive shaft, the second drive shaft configured to be driven by a second motor independently of the driving of the first screw segment;a frame configured to hold both ends of the screw;a first shaft connector mounted to the frame and operably connected to the first motor;a first key affixed to an end of the first drive shaft and configured to connect with the first shaft connector in a single unique position in a rotation direction of the first drive shaft;a second shaft connector mounted to the frame and operably connected to the second motor; anda second key affixed to an end of the second drive shaft and configured to connect with the second shaft connector in a single unique position in a rotation direction of the second drive shaft. 7. The split shaft screw system according to claim 2, further comprising at least one composite plane bearing positioned between the first drive shaft and second drive shaft. 8. A method for conveying an article along a movement path and against a guide by using a screw having at least two screw segments which are independently drivable by a respective at least two concentric drive shafts, the screw further having a plurality of threads, each thread having a crest, a root and a pair of sidewalls, the method comprising: capturing the article between the root and pair of sidewalls;conveying the article by rotatably driving the at least two screw segments together at the same rate;conveying the article by rotatably driving a single one of the at least two segments while the other of the at least two segments is slowed or stopped;supporting both ends of the screw; anddriving the at least two concentric drive shafts by a respective at least two motors, wherein the at least two motors are affixed to a frame at a same downstream end of the screw. 9. The method according to claim 8, further comprising rotating one of the at least two concentric drive shafts within another of the at least two concentric drive shafts. 10. The method according to claim 8, further comprising abutting the at least two screw segments against each other. 11. The method according to claim 8, further comprising: increasing a thickness of the threads on one of the at least two screw segments downstream along the movement path;maintaining as constant a thickness of the threads on another of at least two screw segments along the movement path. 12. The method according to claim 8, further comprising introducing the article into a rotatable starwheel housing at a downstream end of the screw. 13. The method according to claim 12, wherein the introducing of the article further comprises providing for one or more unfilled starwheel housings between articles introduced into the rotatable starwheel, by the conveying of the article by rotatably driving a single one of the at least two segments while the other of the at least two segments remains stopped. 14. A method for conveying an article along a movement path and against a guide by using a screw having at least two screw segments which are independently drivable by a respective at least two concentric drive shafts, the screw further having a plurality of threads, each thread having a crest, a root and a pair of sidewalls, the method comprising: capturing the article between the root and pair of sidewalls;conveying the article by rotatably driving the at least two screw segments together at the same rate;conveying the article by rotatably driving a single one of the at least two segments while the other of the at least two segments is slowed or stopped;providing a frame configured to hold both ends of the screw;providing at least two shaft connectors mounted to the frame and operably connected to a respective at least two motors;connecting a first key to an end of one of the at least two drive shafts to a respective shaft connector of at least two shaft connectors, the first key connectable in only a single unique position in a rotation direction of the screw; andconnecting a second key to an end of another of the at least two drive shafts to a respective shaft connector of at least two shaft connectors, the second key connectable in only a single unique position in a rotation direction of the screw. 15. The method according to claim 9, further comprising providing at least one composite plane bearing between drive shafts of the at least two concentric drive shafts. 16. The method according to claim 8, further comprising, after the conveying the article by rotatably driving a single one of the at least two segments while the other of the at least two segments is slowed or stopped, resuming conveying the article by rotatably driving the at least two screw segments together at the same rate.

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Concentric shaft split timing screw system

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Concentric shaft split timing screw system

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이 특허에 인용된 특허 (13)

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IPC 상세정보(version : 201201)

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