Patent US4939976A successfully refreshed from Google Patents.
US4939976A
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US
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Electromagnetic ground to orbit propulsion method and operating system for high mass payloads
Assignee: Individual
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Filing: 1988-04-01
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Granted: 1990-07-10
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Expires: 2008-04-01
Abstract
Abstract A reusable and regenerative electromagnetic propulsion method and operating system is provided for propelling high mass payloads to orbital velocities which does not require a vacuum environment. The propulsion system comprises a self supporting superconducting dipole coil several kilometers in diameter that is accelerated by magnetic repulsive forces generated by a plurality of giant superconducting field coils mounted in underground tunnels. The propulsion dipole is mounted inside a circular hypersonic wing-like structure equipped with movable aerodynamic control surfaces for guidance. The propulsion system can accelerate a payload with any desired launch azimuth by accelerating along a line of magnetic induction generated by the field coils having the desired azimuth angle. The payload is attached to the propulsion system by a plurality of cables. After reaching orbital velocity, the payload is detached from the propulsion system and the propulsion system is decelerated back to the earth's surface by magnetic repulsive forces generated by the field coils. A large fraction of the orbital energy of the propulsion system is reconverted back into electrical energy by the inductive coupling between the magnetically decelerated propulsion coil and the field coils which is used to launch another payload.
Inventors
- 👤 Michael A. Minovitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:02
CPC Classifications
F; F41; F41B; F41B6/00; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/888; Y10S505/896
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
116 words
A method for accelerating a body to high velocities comprising the steps of: mounting a plurality of stationary spaced apart superconducting field coils with increasing radii with approximately concentric and coplanar relative positions on mounting structures; charging said field coils with electric current thereby creating a primary magnetic field represented by the vector summation of magnetic fields generate by the individual field coils charged with said electric current; charging a movable superconducting propulsion coil with current so as to create a secondary magnetic field opposing said primary magnetic field; attaching said body to said superconducting propulsion coil; and accelerating said body by magnetic repulsive forces exerted on said propulsion coil by said field coils acting simultaneously.
Claim 2
Independent Claim
116 words
A method for accelerating a body to high velocities comprising the steps of: mounting a plurality of stationary spaced apart superconducting field coils with increasing radii with approximately concentric and coplanar relative positions on mounting structures; charging said field coils with electric current thereby creating a primary magnetic field represented by the vector summation of magnetic fields generate by the individual field coils charged with said electric current; charging a movable superconducting propulsion coil with current so as to create a secondary magnetic field opposing said primary magnetic field; attaching said body to said superconducting propulsion coil; and accelerating said body by magnetic repulsive forces exerted on said propulsion coil by said field coils acting simultaneously.
Claim 3
Dependent Claim
23 words
A method as set forth in claim 1 wherein said propulsion coil is a self supporting dipole with an aspect ratio exceeding 100.
Claim 4
Dependent Claim
37 words
A method as set forth in claim 1 further comprising the step of varying said repulsive forces acting on said propulsion coil by changing the direction of a portion of said current flowing around said propulsion coil.
Claim 5
Dependent Claim
30 words
A method as set forth in claim 1 further comprising the step of constructing said stationary and said movable superconducting coils with superconducting material having critical temperatures above 77° K.
Claim 6
Dependent Claim
43 words
A method as set forth in claim 1 further comprising the step of mounting said field coils beneath the earth's surface in coaxial planes approximately parallel to the earth's surface such that said primary magnetic field extends into space above the earth's surface.
Claim 7
Dependent Claim
28 words
A method as set forth in claim 5 wherein said accelerating step comprises the step of accelerating said body in an upward direction away from the earth's surface.
Claim 8
Dependent Claim
24 words
A method as set forth in claim 6 further comprising the step of mounting said movable superconducting propulsion coil inside an aerodynamically streamlined housing.
Claim 9
Dependent Claim
29 words
A method as set forth in claim 7 further comprising the step of mounting movable aerodynamic control surfaces on said housing for guiding said coil through the earth's atmosphere.
Claim 10
Dependent Claim
28 words
A method as set forth in claim 7 further comprising the step of maintaining said propulsion coil at cryogenic temperature by cryogenic cooling means mounted inside said housing.
Claim 11
Independent Claim
148 words
An apparatus for accelerating a body to high velocities comprising: a plurality of stationary superconducting field coils with increasing radii; means for mounting said field coils with approximately concentric and coplanar relative positions; means for charging said superconducting field coils with electric current thereby generating a primary magnetic field represented by the vector suction of magnetic fields generated by the individual field coils charged with said electric current; a movable superconducting propulsion coil; means for charging said movable superconducting propulsion coil with electric current so as to generate a secondary magnetic field that opposes said primary magnetic field generated by said stationary superconducting field coils; means for attaching said body to said movable superconducting propulsion coil; and means for launching said body such that said body is accelerated away from said field coils by magnetic repulsive forces exerted on said propulsion coil by said field coils acting simultaneously.
Claim 12
Independent Claim
148 words
An apparatus for accelerating a body to high velocities comprising: a plurality of stationary superconducting field coils with increasing radii; means for mounting said field coils with approximately concentric and coplanar relative positions; means for charging said superconducting field coils with electric current thereby generating a primary magnetic field represented by the vector suction of magnetic fields generated by the individual field coils charged with said electric current; a movable superconducting propulsion coil; means for charging said movable superconducting propulsion coil with electric current so as to generate a secondary magnetic field that opposes said primary magnetic field generated by said stationary superconducting field coils; means for attaching said body to said movable superconducting propulsion coil; and means for launching said body such that said body is accelerated away from said field coils by magnetic repulsive forces exerted on said propulsion coil by said field coils acting simultaneously.
Claim 13
Dependent Claim
23 words
An apparatus as set forth in claim 10 wherein said propulsion coil is a self supporting dipole with an aspect ratio exceeding 100.
Claim 14
Dependent Claim
38 words
An apparatus as set forth in claim 10 wherein said propulsion coil comprises a plurality of current carrying loops and switching means for reversing the direction of current flow in said loops for varying said magnetic repulsive forces.
Claim 15
Dependent Claim
28 words
An apparatus as set forth in claim 10 wherein said field coils and said propulsion coil are constructed with superconducting material having a critical temperature above 77° K.
Claim 16
Dependent Claim
55 words
An apparatus as set forth in claim 10 wherein said means for mounting said field coils comprises: a plurality of circular underground tunnels; and means for mounting said field coils inside said tunnels in parallel planes approximately parallel to the earth's surface such that said primary magnetic field extends into space above the earth's surface.
Claim 17
Dependent Claim
22 words
An apparatus as set forth in claim 14 wherein said body is accelerated in an upward direction away from the earth's surface.
Claim 18
Dependent Claim
24 words
An apparatus as set forth in claim 15 further comprising: a circular airfoil; and means for mounting said movable superconducting coil inside said airfoil.
Claim 19
Dependent Claim
41 words
An apparatus as set forth in claim 16 further comprising: movable aerodynamic control surfaces mounted on said airfoil; and means for moving said control surfaces such that said airfoil can be guided by aerodynamic forces while traversing through the earth's atmosphere.
Claim 20
Dependent Claim
26 words
An apparatus as set forth in claim 16 further comprising cryogenic cooling means mounted inside said airfoil for maintaining said movable superconducting coil at cryogenic temperature.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |