# US 5,703,422 A · Magnetic eccentric motion motor

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- Number: US 5,703,422 A
- Document ID: US5703422A
- Status: Granted
- Kind: A
- Application number: 08/467,710
- Filed: 1995-06-06
- Granted: 1997-12-30
- Earliest claimed: 1991-03-01
- Assignees: Sarcos Corp.
- Inventors: Stephen C. Jacobsen; Clark C. Davis
- Web page: https://patentgrep.com/patent/US5703422A

## CPC

- H02K 41/065: {Nutating motors}
- F04C 15/0057: {Driving elements, brakes, couplings, transmission specially adapted for machines or pumps (brakes, couplings, transmissions per se F16, B60)}
- F04C 15/0065: {for eccentric movement}
- F04C 15/008: {Prime movers}
- H02K 16/02: Machines with one stator and two {or more} rotors
- H02K 41/06: Rolling motors, i.e. motors having the rotor axis parallel to the stator axis and following a circular path as the rotor rolls around the inside or outside of the stator {; Nutating motors, i.e. having the rotor axis parallel to the stator axis inclined with respect to the stator axis and performing a nutational movement as the rotor rolls on the stator}
- H02K 16/00: Machines with more than one rotor or stator {(machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029)}
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS

## Abstract

An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.

## Claims

### Claim 1

An eccentric-motion motor comprising
a stator defining a continuous closed surface pathway,
a plurality of elongate permanent magnets disposed in an array at the closed surface, the magnets having enlarged end pieces being disposed to form the continuous closed surface pathway,
an armature comprising a bar of ferromagnetic material disposed to roll on the closed surface pathway,
an electrical conductor for receiving electrical current and helically spaced out of contact with and about the armature and out of electrical contact with the stator, said conductor suspended through electrically insulated apertures in the stator, the apertures having electrically insulated sleeves, the sleeves having an outer portion in contact with the aperture and an inner portion in contact with and compressed about leads of the conductor, and
means for supplying electrical current of selectively alternatable polarity to the conductor to successively cause the armature to switch polarities and thereby be attracted toward and repelled from the permanent magnets to thus roll on the pathway.

### Claim 2 (depends on 1)

A motor as in claim 1 wherein said permanent magnets comprise elongate bars disposed generally in parallel with one another in a circumferential array about the armature to define a hollow cylindrical stator, said stator further including a pair of tracks positioned circumferentially in a spaced-apart relationship in the stator hollow for rollably receiving the armature, wherein said conductor is disposed helically in the stator hollow so that the armature may roll on the tracks without contacting the conductor, and wherein said armature is disposed in the stator hollow to roll on the tracks.

### Claim 3 (depends on 2)

A motor as in claim 2 wherein adjacent poles of the permanent magnets have opposite polarity.