Permanent magnet coupling and transmission
AssigneeMagna Force, Inc.
InventorKarl J. Lamb
Life of this patent
Estimating the term…
Abstract
A magnetic coupler has a magnetic disc containing permanent magnets located between two electroconductive plates and separated therefrom by air gaps. The magnetic disc and electroconductive plates are mounted on coaxial or parallel-spaced input and output shafts so that rotation of the input shaft causes rotation of the output shaft by way of magnetic friction between the permanent magnets and the electroconductive plates.
Claims18
A coupler for two parallel input and output shafts comprising:
- a rotary member containing two sets of permanent magnets with the poles of the magnets in one set being reversed relative to the poles in the other set;
- two rotary non-ferrous electroconductive elements positioned on opposite sides of said rotary member and each separated from both of said sets by respective air gaps, at least one of said electroconductive elements having a ferrous backing disc;
- and
- mounting means for mounting said electroconductive elements and said rotary member on said shafts whereby rotation of said input shaft causes rotation of said output shaft by way of magnetic action between the permanent magnets on said rotary member and said electroconductive elements, there being substantially no magnetic attraction between said magnets and said electroconductive elements when they are stationary.
A coupler comprising:
- a magnetic disc unit concentric to a rotary axis and containing two alternating sets of permanent magnets with the poles of the magnets in one set being reversed relative to the poles in the other set;
- non-ferrous electroconductive elements axially aligned on opposite sides of said disc unit and separated therefrom by respective air gaps, said elements being backed by ferrous backing members and coupled together outwardly away from said disc unit;
- and
- means for rotating said disc unit relative to said elements and their backing members on said rotary axis.
A coupler comprising:
- first and second non-ferrous electroconductive units with ferrous backing plates arranged in spaced-apart coaxial relationship on a rotary axis,
- said first unit being arranged to be driven by a rotary power source and said, second unit being structured to be coupled to a rotary load;
- a permanent magnet unit positioned between said electroconductive units and separated therefrom by air gaps,
- said magnet unit being mounted to rotate independently about an axis parallel to said rotary axis for transferring rotational energy from said first unit to said second unit.
A coupler comprising:
- two rotary non-ferrous electroconductive plates mounted to rotate on a first rotary axis, said plates having ferrous backing plates;
- and a rotary disc containing permanent magnets and mounted to rotate on a second rotary axis which is in spaced parallel relation to said first rotary axis, adjacent of said magnets having their poles reversed;
- said disc and electroconductive plates having an overlap zone in which they are separated by air gaps, said permanent magnets being arranged to pass through said overlap zone when said rotary disc is rotated.
A coupler with a magnet unit mounted on a first rotary shaft and separated by air gaps from two electroconductive units connected together outward of the magnet unit with one of the electroconductive units mounted on a second rotary shaft coaxial with the first shaft, characterized by the electroconductive units having electroconductive discs with good electrical conductivity adjoining the air gaps, and the magnet unit having a non-ferrous carrier disc mounted on the first shaft and containing two alternating sets of multiple permanent magnets arranged so that the poles of the magnets in each set face toward said electroconductive discs and are reversed in position relative to the corresponding poles of the magnets in the other set, and characterized by the action of the magnetic flux from the magnets with the electroconductive discs resulting in the turning of one of the shafts responsive to turning of the other shaft.
A coupler for input and output shafts comprising:
- an electroconductive unit including first and second non-ferrous electroconductive elements with good electrical conductivity backed by coaxial ferrous backing discs joined together adjacent their periphery, said electroconductive elements facing one another in spaced apart coaxial relation;
- a magnet unit between said electroconductive elements and spaced therefrom, said magnet unit having a carrier containing multiple permanent magnets each having its poles facing oppositely toward respective of said electroconductive elements, half of said magnets having their poles reversed in end to end position relative to like poles of the other of said magnets, whereby magnetic flow paths between poles of opposite polarity are formed on opposite sides of said carrier with the magnetic flow paths at each side of the carrier being separated by the carrier from the magnetic flow paths at the other side of the carrier,
- and mounting means for mounting one of said units on an input shaft and for mounting the other of said units on a coaxial output shaft.
Dependencies are inferred from the claim text.