초록 ▼

Electromagnetic motor with a piston that moves linearly with respect to the stator in either direction. Embodiments include a piston internal or external the stator. The piston includes one or more magnetic flux producing elements in all embodiments, with some embodiments having a ferro-magnetic pla

Electromagnetic motor with a piston that moves linearly with respect to the stator in either direction. Embodiments include a piston internal or external the stator. The piston includes one or more magnetic flux producing elements in all embodiments, with some embodiments having a ferro-magnetic plate on either side of the flux producing element. Further, in all embodiments the stator includes three magnetic flux producing elements with either two coils with one or more magnets therebetween or with the two coils and a coil magnet substitute therebetween. All embodiments provide positive piston return to a center at rest position. In all embodiments the piston is centered with respect to the stator resulting from either magnetic interaction between the piston and stator magnets, or between the piston magnet and the stator magnet substitute coil.

대표청구항 ▼

What is claimed is: 1. An electromagnetic motor comprising: a stator having: a non-ferrous post of a selected length having a first end and a second end and a first diameter; first and second stator magnetic flux producing elements spaced apart from each other around said post; and an intermediate

What is claimed is: 1. An electromagnetic motor comprising: a stator having: a non-ferrous post of a selected length having a first end and a second end and a first diameter; first and second stator magnetic flux producing elements spaced apart from each other around said post; and an intermediate stator magnetic flux producing element around said post between said first and second stator flux producing elements; with each of said first and second stator magnetic flux producing elements and said intermediate stator magnetic flux producing element each having an internal diameter that is slightly larger than said first diameter and said stator having a third diameter being a maximum external diameter of the stator components; a piston encircling said stator having: a piston magnetic flux producing element ring having a first and second end with an internal diameter at least slightly greater than said third diameter and an external diameter being a fourth diameter; and first and second ferro-magnetic rings one of which is coupled to each of said first and second ends of said piston magnetic flux producing element ring with each of said first and second ferro-magnetic rings having an internal diameter at least slightly greater than said third diameter and an external diameter being at least as large as said fourth diameter; wherein said intermediate stator flux producing element has a first magnetic polarity and said piston magnetic flux producing element has a second magnetic polarity with said first and second magnetic polarities being in opposite axial directions relative to said post; and wherein a home position of said piston is substantially centered relative to said intermediate stator flux producing element when no magnetic flux is being supplied by said first and second stator magnetic flux producing elements. 2. An electromagnetic motor as in claim 1 wherein: said intermediate stator magnetic flux producing element and said piston magnetic flux producing element ring are each a hollow core circular magnet; each said first and second stator magnetic flux producing elements are coils wound in opposite directions around said post each having approximately the same inductance value. 3. An electromagnetic motor as in claim 1 wherein said non-ferrous post has attached to said first end a mounting device for affixing said post to a selected surface. 4. An electromagnetic motor as in claim 1 wherein said piston magnetic flux producing element ring has a width substantially equal to, or wider than, said intermediate stator magnetic flux producing element. 5. An electromagnetic motor comprising: a stator having: a non-ferrous tube of a selected axial length having a first end and a second end, a selected internal cross-sectional shape along the axial length and a selected wall thickness; first and second stator electrically conductive coils wound in the opposite direction from each other with each disposed to produce a selected magnitude and polarity of magnetic flux axially within said tube in response to a signal applied to both coils with each of said first and second stator coils spaced apart from each other and mounted externally around said tube; and at least one intermediate stator magnetic flux producing element, or elements, disposed to produce a constant magnitude and first polarity of magnetic flux axially in a first direction within said tube and mounted externally around the tube between said first and second stator electrically conductive coils; and a piston within said tube sized and shaped to move freely therewithin and having an axial length that is only a fraction of the length of said tube having a piston magnetic flux producing element disposed to produce a constant magnitude and second polarity of magnetic flux axially in a second direction within said tube; wherein during operation of said electromagnetic motor said first and second magnetic polarities are in opposite directions axially within said tube; wherein a home position of said piston is centered relative to said intermediate stator flux producing element, or elements, when no magnetic flux is being supplied by said first and second stator electrically conductive coils; wherein: said piston magnetic flux producing element includes a permanent magnet with said second magnetic polarity and has a size and shape that is smaller than said selected internal cross-sectional shape of said tube; said at least one intermediate stator magnetic producing element, or elements, with said first magnetic polarity includes a permanent hollow core magnet having a size that fits externally around said tube; and said home position of said piston is determined by the interaction of said opposite polarities of said stator and piston magnets and relative strength of the magnetic flux produced be each of said stator and piston magnets; wherein said piston further includes first and second ferro-magnetic plates affixed to opposite faces of said piston magnet with a size of said face of each of said plates being at least as large as said face of said piston magnet and smaller than said internal cross-sectional shape of said tube; wherein said first and second ferro-magnetic plates each have a fourth width that is at least equal to said second width; and wherein each of said first and second plates have a “C” shaped cross-section if cut perpendicularly to said face of each of said first and second plates. 6. An electromagnetic motor as in claim 1 wherein said stator and piston magnets are of equal strength resulting in said home position of said piston magnet being substantially centered relative to said stator magnet. 7. An electromagnetic motor as in claim 5 wherein said stator hollow core magnet has a first width and said piston magnet has a second width wherein said second width is equal to, or greater than said first width. 8. An electromagnetic motor as in claim 7 wherein: said first and second stator electrically each have conductive coils with each coil having substantially the same inductance value; and each of said coils have a same third width with said third width being at least twice said first width. 9. An electromagnetic motor as in claim 5 wherein each of said coils have a same width. 10. An electromagnetic motor as in claim 1 wherein said piston magnet and each of said first and second plates have a circular face perpendicular to a center axis of said tube with a size and shape that is smaller than said internal cross-sectional shape of said tube. 11. An electromagnetic motor as in claim 5 wherein said first and second ferro-magnetic plates each have a fourth width with the sum of twice said fourth width and said second width is the effective magnetic width of said piston with said sum being substantially greater than said first width. 12. An electromagnetic motor as in claim 5 wherein each of said first and second stator electrically conductive coils and said at least one intermediate stator magnetic flux producing element, or elements, are each a coil of wire wound externally around said tube with said first and second stator electrically conductive coils having substantially the same inductance value. 13. An electromagnetic motor as in claim 12 wherein said coil or coils of said at least one intermediate stator magnetic flux producing element, or elements, has or have a combined first width and each of said first and second stator electrically conductive coils has a third width with said third width being at least twice said first width. 14. An electromagnetic motor as in claim 12 wherein said piston magnetic flux producing element includes a permanent magnet with said second magnetic polarity. 15. An electromagnetic motor as in claim 14 wherein said piston further includes first and second ferro-magnetic plates affixed to opposite faces of said piston magnet with a size and shape of said face of each of said plates being at least as large as said face of said piston magnet and smaller than said internal size and shape of said tube. 16. An electromagnetic motor comprising: a stator having: a non-ferrous tube of a selected axial length having a first end and a second end, a selected internal cross-sectional shape along the axial length and a selected wall thickness; first and second stator electrically conductive coils wound in the opposite direction from each other with each disposed to produce a selected magnitude and polarity of magnetic flux axially within said tube in response to a signal applied to both coils with each of said first and second stator coils spaced apart from each other and mounted externally around said tube; and at least one intermediate stator magnetic flux producing element, or elements, disposed to produce a constant magnitude and first polarity of magnetic flux axially in a first direction within said tube and mounted externally around the tube between said first and second stator electrically conductive coils; and a piston within said tube sized and shaped to move freely therewithin and having an axial length that is only a fraction of the length of said tube having a piston magnetic flux producing element disposed to produce a constant magnitude and second polarity of magnetic flux axially in a second direction within said tube; wherein during operation of said electromagnetic motor said first and second magnetic polarities are in opposite directions axially within said tube; wherein a home position of said piston is centered relative to said intermediate stator flux producing element, or elements, when no magnetic flux is being supplied by said first and second stator electrically conductive coils; and wherein said at least one intermediate stator magnetic producing element, or elements, includes: an adjustable assembly including: a first circular ring having an inner diameter that is slightly greater than an outer size and shape of said tube and a fifth width, said first circular ring having an outer surface with outward facing screw threads formed thereon; a second circular ring of a sixth width with inward facing screw threads formed thereon to mate with said screw threads of said first circular ring with said sixth width being less than said fifth width; and wherein said at least one intermediate stator magnetic flux producing element includes a hollow core circular magnet mounted on an outer surface of said second ring with said magnet having a seventh width that is substantially equal to, or smaller than, said sixth width; wherein a longitudinal position of said hollow core magnet is adjustable with respect to a longitudinal axis of said tube. 17. An electromagnetic motor comprising: a stator having: a non-ferrous tube of a selected axial length having a first end and a second end, a selected internal cross-sectional shape along the axial length and a selected wall thickness; first and second stator electrically conductive coils wound in the opposite direction from each other with each disposed to produce a selected magnitude and polarity of magnetic flux axially within said tube in response to a signal applied to both coils with each of said first and second stator coils spaced apart from each other and mounted externally around said tube; and at least one intermediate stator magnetic flux producing element, or elements, disposed to produce a constant magnitude and first polarity of magnetic flux axially in a first direction within said tube and mounted externally around the tube between said first and second stator electrically conductive coils; and a piston within said tube sized and shaped to move freely therewithin and having an axial length that is only a fraction of the length of said tube having a piston magnetic flux producing element disposed to produce a constant magnitude and second polarity of magnetic flux axially in a second direction within said tube; wherein during operation of said electromagnetic motor said first and second magnetic polarities are in opposite directions axially within said tube; wherein a home position of said piston is centered relative to said intermediate stator flux producing element, or elements, when no magnetic flux is being supplied by said first and second stator electrically conductive coils; wherein said at least one intermediate stator magnetic producing element, or elements, includes two permanent hollow core magnets each with said first magnetic polarity and each has a size that fits externally around said tube with each of said two permanent hollow core magnets spaced apart from each other and spaced apart from an adjacent one of said first and second stator electrically conductive coils; and said stator further includes three non-ferrous spacer rings, one spacer ring between said two permanent hollow core magnets, a second spacer ring between one of said two permanent hollow core magnets and an adjacent one of first and second stator electrically conductive coils and a third spacer ring between a second of said two permanent hollow core magnets and an adjacent a second of said first and second stator electrically conductive coils with each of said non-ferrous spacer rings being affixable to said tube at selected locations. 18. An electromagnetic motor as in claim 17 wherein said two permanent hollow core magnets and said adjacent one of said first and second stator electrically conductive coils are each spaced apart a same distance. 19. An electromagnetic motor as in claim 17 wherein said stator further includes one of a fourth and fifth non-ferrous retainer rings on a side of each of said first and second stator electrically conductive coils toward an end of said tube.