US3626858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear induction motor stator assembly
Assignee: Tracked Hovercraft Ltd
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Filing: 1969-07-10
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Granted: 1971-12-14
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Expires: 1989-07-10
Abstract
Abstract To control the thrust and hence the acceleration produced by a linear induction motor, an actuator is provided to vary the gap between the stator and the cooperating linear induction motor reaction rail. A tracked air cushion vehicle is shown propelled by a double sided linear motor. In one arrangement the stator has two parts which are disposed one on either side of the reaction rail, the stator parts are pivoted and a hydraulic actuator can pivot them apart. In another arrangement where the stator has two parts, the stator parts remain parallel to each other as the actuator moves them apart.
Inventors
- 👤 Norman Whitfield Colling
- 👤 George Philip Quayle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:59
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025; B; B60; B60L; B60L15/00; B60L15/002; B60L15/005; B60L2200/00; B60L2200/26; B60L2220/00; B60L2220/10; B60L2220/12; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
127 words
A linear induction motor stator assembly for providing a propulsive thrust to propel a tracked air cushion vehicle along a predetermined path along which the said vehicle is constrained to travel, by electromagnetic cooperation with an elongate linear induction motor reaction rail extending along the predetermined path, the stator assembly having at least one stator part spaced from and adapted to cooperate with the elongate reaction rail, the stator assembly being movable relative to the rail along the length thereof, in which the improvement comprises means for varying the propulsive thrust produced by the stator including actuator means operable while the stator assembly is moving along the rail for applying a force to the stator part to vary the gap betwEen the stator part and the rail.
Claim 2
Dependent Claim
127 words
A linear induction motor stator assembly for providing a propulsive thrust to propel a tracked air cushion vehicle along a predetermined path along which the said vehicle is constrained to travel, by electromagnetic cooperation with an elongate linear induction motor reaction rail extending along the predetermined path, the stator assembly having at least one stator part spaced from and adapted to cooperate with the elongate reaction rail, the stator assembly being movable relative to the rail along the length thereof, in which the improvement comprises means for varying the propulsive thrust produced by the stator including actuator means operable while the stator assembly is moving along the rail for applying a force to the stator part to vary the gap betwEen the stator part and the rail.
Claim 3
Dependent Claim
30 words
A stator assembly as claimed in claim 1 arranged so that the stator part is maintained parallel to the rail while the gap is being varied by the actuator means.
Claim 4
Dependent Claim
27 words
A stator assembly as claimed in claim 1 in which the stator part is pivoted and swings towards or away from the rail to vary the gap.
Claim 5
Dependent Claim
16 words
A stator assembly as claimed in claim 1 in which the actuator means is hydraulically operated.
Claim 6
Dependent Claim
78 words
A linear induction motor stator assembly having two stator parts disposed in use on opposite sides of and spaced from an elongate reaction rail, the stator assembly being movable relative to the rail along the length thereof, in which the improvement comprises actuator means operable while the stator assembly is moving along the rail for applying a force to move the stator parts away from each other to vary the gap between each stator part and the rail.
Claim 7
Dependent Claim
78 words
A linear induction motor stator assembly having two stator parts disposed in use on opposite sides of and spaced from an elongate reaction rail, the stator assembly being movable relative to the rail along the length thereof, in which the improvement comprises actuator means operable while the stator assembly is moving along the rail for applying a force to move the stator parts away from each other to vary the gap between each stator part and the rail.
Claim 8
Dependent Claim
32 words
A stator assembly as claim in claim 5 arranged so that the stator parts are maintained parallel to one another while the stator parts are being moved apart by the actuator means.
Claim 9
Dependent Claim
27 words
A stator assembly as claimed in claim 5 in which the stator parts are pivoted and swing towards or away from each other to vary the gap.
Claim 10
Dependent Claim
16 words
A stator assembly as claimed in claim 5 in which the actuator means is hydraulically operated.
Claim 11
Dependent Claim
18 words
A stator assembly as claimed in claim 1 connected to a track guided vehicle for propelling the vehicle.
Claim 12
Dependent Claim
127 words
A linear induction motor stator assembly for providing a propulsive thrust to propel a tracked air cushion vehicle along a predetermined path along which the said vehicle is constrained to travel, by electromagnetic cooperation with an elongate linear induction motor reaction rail extending along the predetermined path, the stator assembly comprising a body connected to the said vehicle, a linear induction motor stator having a winding energizable to produce the propulsive thrust, interconnection means movably interconnecting the body and the stator with the stator in spaced relation to the reaction rail, and means for varying the propulsive thrust produced by the stator including actuator means controllable to vary the spacing between the stator and the reaction rail during movement of the stator assembly along the predetermined path.
Claim 13
Dependent Claim
127 words
A linear induction motor stator assembly for providing a propulsive thrust to propel a tracked air cushion vehicle along a predetermined path along which the said vehicle is constrained to travel, by electromagnetic cooperation with an elongate linear induction motor reaction rail extending along the predetermined path, the stator assembly comprising a body connected to the said vehicle, a linear induction motor stator having a winding energizable to produce the propulsive thrust, interconnection means movably interconnecting the body and the stator with the stator in spaced relation to the reaction rail, and means for varying the propulsive thrust produced by the stator including actuator means controllable to vary the spacing between the stator and the reaction rail during movement of the stator assembly along the predetermined path.
Claim 14
Dependent Claim
22 words
A stator assembly according to claim 10, wherein the interconnection means and the actuator means comprise at least one actuator in common.
Claim 15
Dependent Claim
46 words
A stator assembly according to claim 10, which includes further actuator means connecting the stator to the body and controllable to move the stator laterally of the reaction rail during movement of the stator assembly along the predetermined path whereby to further vary the propulsive thrust.
Claim 16
Dependent Claim
145 words
A linear induction motor stator assembly for providing a propulsive thrust for propelling a tracked air cushion vehicle along a predetermined path along which said vehicle is constrained to travel, by electromagnetic cooperation with an elongate linear induction motor reaction rail extending in the manner of a fin along the predetermined path, the stator assembly comprising a body connected to said vehicle, a linear induction motor stator formed with a winding energizable to produce the propulsive thrust and having two stator parts, interconnection means movably interconnecting the body and the stator with the stator parts disposed one on either side of the reaction rail in spaced relation thereto, and means for varying the propulsive thrust produced by the stator including actuator means controllable to vary the spacing between each stator part and the reaction rail during movement of the stator assembly along the predetermined path.
Claim 17
Dependent Claim
145 words
A linear induction motor stator assembly for providing a propulsive thrust for propelling a tracked air cushion vehicle along a predetermined path along which said vehicle is constrained to travel, by electromagnetic cooperation with an elongate linear induction motor reaction rail extending in the manner of a fin along the predetermined path, the stator assembly comprising a body connected to said vehicle, a linear induction motor stator formed with a winding energizable to produce the propulsive thrust and having two stator parts, interconnection means movably interconnecting the body and the stator with the stator parts disposed one on either side of the reaction rail in spaced relation thereto, and means for varying the propulsive thrust produced by the stator including actuator means controllable to vary the spacing between each stator part and the reaction rail during movement of the stator assembly along the predetermined path.
Claim 18
Dependent Claim
46 words
A stator assembly according to claim 13, which includes further actuator means connecting the stator to the body and controllable to move the stator laterally of the reaction rail during movement of the stator assembly along the predetermined path whereby to further vary the propulsive thrust.
Claim 19
Dependent Claim
63 words
A stator assembly according to claim 13, whiCh includes a plurality of actuators individually connecting the stator parts to the body and controllable to vary the spacing of the stator parts from the reaction rail during movement of the stator assembly along the predetermined path whereby to vary the propulsive thrust, the interconnection means and the actuator means comprising the actuators in common.
Claim 20
Dependent Claim
75 words
A stator assembly according to claim 13, wherein the interconnection means comprises two arms each attached to a respective one of the stator parts and extending to beyond the free edge of the reaction rail, the actuator means comprising an actuator extending between the arms beyond the free edge of the reaction rail and controllable to vary the spacing between each stator part and the reaction rail by moving the arms relatively to one another.
Claim 21
Dependent Claim
22 words
A stator assembly according to claim 16, wherein the arms are each pivotally mounted between the respective stator part and the actuator.
Claim 22
Dependent Claim
15 words
A stator assembly according to claim 10 in combination with a tracked air cushion vehicle.
Claim 23
Dependent Claim
15 words
A stator assembly according to claim 13 in combination with a tracked air cushion vehicle.
References Cited (Backward Citations)
US3516361A
Cited
US3434083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |