1
James H Hahn: Brushless disc-type DC motor or generator. David H Rush, Darby & Darby, April 2, 1985: US04508998 (31 worldwide citation)

A brushless, preferably coreless, disc-type DC motor or generator characterized by a positive, unidirectional, nearly constant torque is disclosed. The machine in a preferred form comprises a rotor disc mounted for rotation with the shaft and a stator fixedly mounted in coaxial parallel relation to ...


2
James H Hahn: Electromechanical machine. David H Rush, Darby & Darby, August 12, 1986: US04605873 (10 worldwide citation)

An electromechanical machine is disclosed which comprises a field producing assembly mounted in a housing so as to define an air gap circumferentially disposed about an axis of rotation. The field assembly is structured to produce a distribution of magnetic flux in the air gap having P periodic extr ...


3
James H Hahn: Electromechanical machine. David H Rush, Darby & Darby, June 28, 1983: US04390805 (7 worldwide citation)

A disc-type motor characterized by increased efficiency is disclosed. The motor has two parallel spaced stator members each having a flat circular shape and an even plurality of pie-segmented permanent-magnet poles in a circular array thereon, illustratively eight in number. The facing poles of the ...


4
James H Hahn deceased: Electromechanical machine and armature structure therefor. David H Rush, Darby & Darby, May 16, 2000: US06064135 (5 worldwide citation)

The coils on the disc-type armature of an electromechanical machine are all wound in the same direction (rotational sense). The coils on each face of the armature are formed into at least two series connected groups of coils which are disposed on the surface of the member so that each coil of one gr ...


5
Stanley E Dunn: Electro mechanical machine and armature structure therefor. David H Rush, Darby & Darby, May 22, 2001: US06236138 (1 worldwide citation)

The coils on the disc-type armature of an electro mechanical machine are all wound in the same direction (rotational sense). The coils on each face of the armature are formed into at least two series connected groups of coils which are disposed on the surface of the member so that each coil of one g ...


6
James H Hahn: Electromechanical machine and armature strucgture therefor. David H Rush, wang maohua, May 16, 2001: CN99804609

The coils (I-IV) on the disc-type armature of an electromechanical machine are all wound in the same direction (rotational sense). The coils on each face of the armature are formed into at least two series connected groups of coils (A-B and C-D) which are disposed on the surface of the member so tha ...