An electric motor is adapted for driving an eccentric-motion device that employs eccentric motion about a device axis. The motor includes a stator unit and a rotor unit operatively coupled to the stator unit. The rotor unit has a rotor shaft rotatable about a rotor axis relative to the stator unit. The shaft is connectable to the eccentric-motion device so as to drive the eccentric motion thereof. The rotor unit includes a counterweight assembly that is rotatably connectable to the shaft and configured to rotate in unison therewith about the rotor axis. The counterweight assembly has a mass and a center of mass that is offset from the rotor axis at an offset distance in a radial direction that intersects the rotor axis perpendicularly, wherein at least the mass of the counterweight assembly is selected to counterbalance the eccentric-motion device.
F04C 18/24 - Rotary-piston pumps specially adapted for elastic fluids of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
F04C 18/26 - Rotary-piston pumps specially adapted for elastic fluids of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions of internal-axis type
F04C 18/48 - Rotary-piston pumps with non-parallel axes of movement of co-operating members
F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F04C 18/04 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents of internal-axis type
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Direct current motors; electric motors for machines; electric motors for power tools; electric motors, and their parts, not for land vehicles; electricity generators that may also be used as electric motors for vehicles; engines and motors for the generation of electricity; hydraulic engines and motors; motors and engines, except for land vehicles; motors and pumps for refrigerators and freezers; motors for air conditioners Motors, electric, for land vehicles
