US4960760A
Expired / Lapsed
US
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Contactless mass transfer system
Assignee: WRG TECHNOLOGIES
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Filing: 1989-08-10
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Granted: 1990-10-02
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Expires: 2009-08-10
Abstract
Abstract An apparatus designed to move mass without contact is described. The apparatus contains a chamber which is formed by alternating sections of superconducting material and electromagnetic coils. The chamber is cooled to below the critical temperature of the superconducting material, and a magnetic object is disposed in the center of the chamber. A series of coils along the chamber are sequentially energized by direct current to form electromagnetic fields. The sequence and direction of these fields causes the movement of the magnetized object within the chamber.
Inventors
- 👤 Xingwu Wang
- 👤 James D. Royston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:54
CPC Classifications
F; F41; F41B; F41B6/00; H; H02; H02K; H02K35/00; H02K55/00; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/902; Y10S505/903; Y10S505/907
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
240 words
A contactless mass transfer system, comprised of a chamber formed by alternating sections of superconductive material and electromagnetic coils, means for cooling said chamber, and means for delivering asynchronous direct current pulses to said chamber, wherein: (a) the interior surfaces of said chamber define a symmetrical shape; (b) said chamber is comprised of at least two sections, each of which consists essentially of superconductive material which has a first critical field value greater than about 10 Gauss and a second critical field value of greater than about 30 Tesla, wherein: 1. said sections consisting essentially of superconductive material are separated from each othger by an air gap, wherein: (a) each of the air gaps between two adjacent sections of superconductive material are less than 50 percent of the levitation height of the system, and (b) said levitation height is the average distance between the top surface of said chamber and the center of said chamber; (c) and electromagnetic coil is disposed within each said air gaps, wherein: 1. the length of the each of said sections of superconductive material is at least four times as great as the width of each of said coils, 2. said chamber is comprised of at least two of said electromagnetic coils disposed within said air gaps, 3. said means for delivering asynchronous direct current pulses provides direct current pulses to at least two of said coils in said chamber at different points in time.
Claim 2
Dependent Claim
240 words
A contactless mass transfer system, comprised of a chamber formed by alternating sections of superconductive material and electromagnetic coils, means for cooling said chamber, and means for delivering asynchronous direct current pulses to said chamber, wherein: (a) the interior surfaces of said chamber define a symmetrical shape; (b) said chamber is comprised of at least two sections, each of which consists essentially of superconductive material which has a first critical field value greater than about 10 Gauss and a second critical field value of greater than about 30 Tesla, wherein: 1. said sections consisting essentially of superconductive material are separated from each othger by an air gap, wherein: (a) each of the air gaps between two adjacent sections of superconductive material are less than 50 percent of the levitation height of the system, and (b) said levitation height is the average distance between the top surface of said chamber and the center of said chamber; (c) and electromagnetic coil is disposed within each said air gaps, wherein: 1. the length of the each of said sections of superconductive material is at least four times as great as the width of each of said coils, 2. said chamber is comprised of at least two of said electromagnetic coils disposed within said air gaps, 3. said means for delivering asynchronous direct current pulses provides direct current pulses to at least two of said coils in said chamber at different points in time.
Claim 3
Dependent Claim
23 words
The mass transfer system as recited in claim 1, wherein said superconductive material has a critical temperature greater than about 85 degrees Kelvin.
Claim 4
Dependent Claim
18 words
The mass transfer system as recited in claim 1, wherein said superconductive material is a Type II superconductor.
Claim 5
Dependent Claim
26 words
The mass transfer system as recited in claim 3, wherein the first critical field of said superconductive material is from about 10 to about 100 Gauss.
Claim 6
Dependent Claim
26 words
The mass transfer system as recited in claim 4, wherein the second critical field of said superconductive material is from about 30 to about 100 Tesla.
Claim 7
Dependent Claim
26 words
The mass transfer system as recited in claim 5, wherein said superconductive material is comprised of from about 0.1 to about 10 weight percent of silver.
Claim 8
Dependent Claim
21 words
The mass transfer system as recited in claim 5, wherein the interior surfaces of said chamber define a circular cross section.
Claim 9
Dependent Claim
16 words
The mass transfer system as recited in claim 7, wherein said chamber has a circular cross-section.
Claim 10
Dependent Claim
16 words
The mass transfer system as recited in claim 5, wherein said chamber has a square cross-section.
Claim 11
Dependent Claim
20 words
The mass transfer system as recited in claim 5, wherein said sections of superconductive material are formed from heat-treated powder.
Claim 12
Dependent Claim
26 words
The mass transfer system as recited in claim 10, wherein said coils are comprised of a metal selected from the group consisting of copper and silver.
Claim 13
Dependent Claim
14 words
The mass transfer system as recited in claim 11, wherein said metal is copper.
Claim 14
Dependent Claim
17 words
The mass transfer system as recited in claim 10, wherein said coils are comprised of magnet wire.
Claim 15
Dependent Claim
24 words
The mass transfer system as recited in claim 13, wherein said magnet wire has an AWG gauge of from about 20 to about 30.
Claim 16
Dependent Claim
27 words
The mass transfer system as recited in claim 14, wherein each of said electromagnetic coils is contiguous with at least one of said sections of superconductive material.
Claim 17
Dependent Claim
29 words
The mass transfer system as recited in claim 15, wherein at least one of said electromagnetic coils is contigous with at least two of said sections of superconductive material.
Claim 18
Dependent Claim
27 words
The mass transfer system as recited in claim 16, wherein said means for delivering asynchronous direct current pulses to said chamber is comprised of a power supply.
Claim 19
Dependent Claim
27 words
The mass transfer system as recited in claim 17, wherein said means for delivering asynchronous direct current pulses to said chamber is comprised of a power transistor.
Claim 20
Dependent Claim
26 words
The mass transfer system as recited in claim 18, wherein said means for delivering asynchronous direct current pulses to said chamber is comprised of a microprocessor.
Claim 21
Dependent Claim
19 words
The mass transfer system as recited in claim 5, wherein said superconductive material comprises at least one inorganic oxide.
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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) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |