US4652800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moving object stop control method by a linear motor
Assignee: Hitachi Kiden Kogyo Ltd
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Filing: 1985-03-01
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Granted: 1987-03-24
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Expires: 2005-03-01
Abstract
Abstract A moving object stop control method using a linear motor comprising a movable element mounted to the moving object and a pair of stators disposed to put therebetween the stop position of the moving object, the pair of stators being applied with exciting voltages opposite phase to each other, the exciting voltages each being reduced of amplitude only by a desired magnitude intermittently with the predetermined timing.
Inventors
- 👤 Ichiro Fukuwatari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:07
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025; B; B60; B60L; B60L15/00; B60L15/002; B60L15/005; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A stop control method for stopping a moving object with a linear motor wherein a pair of stators are disposed in proximity to a stop position for said moving object such that said stop position is positioned longitudinally between said stators, wherein said stop control method comprises the steps of: applying exciting voltages to said stators, each with an opposite phase and opposite direction of phase rotation; and reducing the amplitude of each of said exciting voltages by a desired magnitude intermittently with a desired timing on the basis of a signal from a movable object detection sensor disposed near said stop position, whereby said moving object is stopped at said stop position without hunting.
Claim 2
Dependent Claim
115 words
A stop control method for stopping a moving object with a linear motor wherein a pair of stators are disposed in proximity to a stop position for said moving object such that said stop position is positioned longitudinally between said stators, wherein said stop control method comprises the steps of: applying exciting voltages to said stators, each with an opposite phase and opposite direction of phase rotation; and reducing the amplitude of each of said exciting voltages by a desired magnitude intermittently with a desired timing on the basis of a signal from a movable object detection sensor disposed near said stop position, whereby said moving object is stopped at said stop position without hunting.
References Cited (Backward Citations)
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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) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |