Abstract: An electric motor construction and method particularly adapted for integration in rotating final drive members. The motor includes a hollow armature assembly rotatably supported about a permanent magnet stator. The armature assembly includes a winding preferably fabricated by printed circuit techniques in the form of flat conductors clad on a flexible dielectric sheet rolled into a tube and a soft magnetic tube circumferentially surrounding the winding to provide a structural support and a heat sink for the winding and a flux return path for the poles of the permanent magnet stator. In the preferred embodiment, the motor is integrated in the cleaning brush of a vacuum sweeper unit.

Abstract: A double insulated vacuum motor assembly for use in wet/dry utility cleaners. Strategic elements of the motor assembly are shielded by or formed of electrically insulating material to prevent hazardous electrical current between the fan chamber and the motor and migration of fluids into the motor. A unique fan mounting arrangement permits a conventional motor shaft construction and use of a metal fan while preventing the possibility of electrification of the fan. Mounting arrangements and an insulating shroud for the vacuum motor and the fan chamber prevent migration of pressurized fluids into the motor.

Abstract: An electric motor construction and method particularly adapted for integration in rotating final drive members. The motor includes a hollow armature assembly rotatably supported about a permanent magnet stator. The armature assembly includes a winding preferably fabricated by printed circuit techniques in the form of flat conductors clad on a flexible dielectric sheet rolled into a tube and a soft magnetic tube circumferentially surrounding the winding to provide a structural support and a heat sink for the winding and a flux return path for the poles of the permanent magnet stator. In the preferred embodiment, the motor is integrated in the cleaning brush of a vacuum sweeper unit.