Patent US4922830A successfully refreshed from Google Patents.
US4922830A
Expired / Lapsed
US
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Conveyor system utilizing linear motor
Assignee: Daifuku Co Ltd
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Filing: 1988-12-16
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Granted: 1990-05-08
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Expires: 2008-12-16
Abstract
Abstract A conveyor system comprising a conveyor vehicle, a guide rail for supporting the conveyor vehicle to be freely movable relative thereto, and a linear motor including a primary coil and a secondary conductor for driving the conveyor vehicle. The primary coil is mounted on the conveyor vehicle and the secondary conductor is mounted on the guide rail. The guide rail defines a secondary conductor support portion for limiting downward and transverse movements of the secondary conductor.
Inventors
- 👤 Shigeyoshi Fujita
- 👤 Naobumi Sekiya
- 👤 Takashi Okamura
- 👤 Yoshitaka Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:42
CPC Classifications
B; B65; B65G; B65G54/00; B65G54/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
168 words
A conveyor system utilizing a linear motor comprising: a conveyor vehicle having running wheels; a guide rail for supporting said conveyor vehicle to be freely movable relative thereto; a linear motor disposed downwardly of said running wheels and including a primary coil and a secondary conductor for driving said conveyor vehicle, said secondary conductor including a magnetic member and a conducting member, said primary coil attached to said conveyor vehicle, with said primary coil disposed downwardly of and horizontally opposed to said secondary conductor attached to said guide rail; magnetic member support means formed by said conducting member and defined integrally with said guide rail, said magnetic member support means limiting downward and transverse movements of said magnetic member with said support means surrounding said magnetic member; an opening defined at least one end of said magnetic member support means in a longitudinal direction of said guide rail; and an electromagnetic brake for acting on one of said running wheels, said brake biased to an operative position thereof.
Claim 2
Dependent Claim
168 words
A conveyor system utilizing a linear motor comprising: a conveyor vehicle having running wheels; a guide rail for supporting said conveyor vehicle to be freely movable relative thereto; a linear motor disposed downwardly of said running wheels and including a primary coil and a secondary conductor for driving said conveyor vehicle, said secondary conductor including a magnetic member and a conducting member, said primary coil attached to said conveyor vehicle, with said primary coil disposed downwardly of and horizontally opposed to said secondary conductor attached to said guide rail; magnetic member support means formed by said conducting member and defined integrally with said guide rail, said magnetic member support means limiting downward and transverse movements of said magnetic member with said support means surrounding said magnetic member; an opening defined at least one end of said magnetic member support means in a longitudinal direction of said guide rail; and an electromagnetic brake for acting on one of said running wheels, said brake biased to an operative position thereof.
Claim 3
Dependent Claim
24 words
A conveyor system as claimed in claim 1 wherein said brake is operatively connected to one of said running wheels through a reduction mechanism.
Claim 4
Dependent Claim
15 words
A conveyor system as claimed in claim 2 wherein said sensor comprises a rotary encoder.
Claim 5
Dependent Claim
14 words
A conveyor system as claimed in claim 2 wherein said sensor comprises a tachogenerator.
Claim 6
Dependent Claim
33 words
A conveyor system defined in claim 1, further comprising: limiting means for preventing said magnetic member inserted into said magnetic member support means from moving in the longitudinal direction of said guide rail.
Claim 7
Dependent Claim
25 words
A conveyor system as claimed in claim 5 wherein the conveyor vehicle includes a sensor for detecting an amount of rotation of said running wheels.
Claim 8
Dependent Claim
134 words
A conveyor system utilizing a linear motor comprising: a conveyor vehicle having running wheels, a guide rail for supporting said conveyor vehicle to be freely movable relative thereto, a linear motor disposed downwardly of said running wheels and including a primary coil and a secondary conductor for driving said conveyor vehicle, said primary coil attached to said conveyor vehicle and disposed downwardly of said secondary conductor, which is attached to said guide rail, wherein said guide rail integrally defines secondary conductor support means for limiting downward and transverse movements of said secondary conductor with said support means surrounding said secondary conductor, and an electromagnetic brake means acting on one of said running wheels and biased to an operative position, said brake means operatively connected to one of said running wheels through a reduction mechanism.
Claim 9
Dependent Claim
134 words
A conveyor system utilizing a linear motor comprising: a conveyor vehicle having running wheels, a guide rail for supporting said conveyor vehicle to be freely movable relative thereto, a linear motor disposed downwardly of said running wheels and including a primary coil and a secondary conductor for driving said conveyor vehicle, said primary coil attached to said conveyor vehicle and disposed downwardly of said secondary conductor, which is attached to said guide rail, wherein said guide rail integrally defines secondary conductor support means for limiting downward and transverse movements of said secondary conductor with said support means surrounding said secondary conductor, and an electromagnetic brake means acting on one of said running wheels and biased to an operative position, said brake means operatively connected to one of said running wheels through a reduction mechanism.
Claim 10
Dependent Claim
25 words
A conveyor system as claimed in claim 7 wherein said conveyor vehicle includes a sensor for detecting an amount of rotation of said running wheels.
Claim 11
Dependent Claim
15 words
A conveyor system as claimed in claim 8 wherein said sensor comprises a rotary encoder.
Claim 12
Dependent Claim
14 words
A conveyor system as claimed in claim 8 wherein said sensor comprises a tachogenerator.
Claim 13
Dependent Claim
154 words
A conveyor system utilizing a linear motor comprising: a conveyor vehicle having running wheels, a guide rail for supporting said conveyor vehicle to be freely movable relative thereto, a linear motor disposed downwardly of said running wheels and including a primary coil and a secondary conductor for driving said conveyor vehicle, said primary coil attached to said conveyor vehicle and disposed downwardly of said secondary conductor, which is attached to said guide rail, wherein said guide rail integrally defines secondary conductor support means for limiting downward and transverse movements of said secondary conductor with said support means surrounding said secondary conductor, said secondary conductor support means having at least one longitudinal end defining an opening for inserting said secondary conductor, said primary coil being horizontally opposed to said secondary conductor, and an electromagnetic brake for acting on one of said running wheels through a reduction mechanism, said brake biased in an operative position thereof.
Claim 14
Dependent Claim
154 words
A conveyor system utilizing a linear motor comprising: a conveyor vehicle having running wheels, a guide rail for supporting said conveyor vehicle to be freely movable relative thereto, a linear motor disposed downwardly of said running wheels and including a primary coil and a secondary conductor for driving said conveyor vehicle, said primary coil attached to said conveyor vehicle and disposed downwardly of said secondary conductor, which is attached to said guide rail, wherein said guide rail integrally defines secondary conductor support means for limiting downward and transverse movements of said secondary conductor with said support means surrounding said secondary conductor, said secondary conductor support means having at least one longitudinal end defining an opening for inserting said secondary conductor, said primary coil being horizontally opposed to said secondary conductor, and an electromagnetic brake for acting on one of said running wheels through a reduction mechanism, said brake biased in an operative position thereof.
Claim 15
Dependent Claim
25 words
A conveyor system as claimed in claim 11 wherein said conveyor vehicle includes a sensor for detecting an amount of rotation of said running wheels.
Claim 16
Dependent Claim
15 words
A conveyor system as claimed in claim 12 wherein said sensor comprises a rotary encoder.
Claim 17
Dependent Claim
14 words
A conveyor system as claimed in claim 12 wherein said sensor comprises a tachogenerator.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |