Electrical generator or motor structure – Dynamoelectric – Reciprocating
Reexamination Certificate
2007-07-10
2007-07-10
Nguyen, Tran (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Reciprocating
Reexamination Certificate
active
10901967
ABSTRACT:
A toroidal-coil multi-phase linear stepping motor includes a cylindrical housing, an axis coaxially arranged inside the housing, a cylindrical element supported by the axis and an armature fixed to the housing around the cylindrical element through an air gap in the radial direction. The axis is fixed to the housing and the cylindrical element linearly moves along the axis. The cylindrical element has toroidal permanent magnets that are alternately magnetized in N pole and S pole in the axial direction. The armature consists of armature units arranged around the axis. Each armature unit has a toroidal coil and a pair of armature yokes that hold the toroidal coil. Each armature yoke has toroidal magnetic teeth on its inner surface. The invention also includes a toroidal-coil single-phase linear reciprocating motor and a cylinder compressor and a cylinder pump using these motors.
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Patent Abstract of Japan, JP 10-191619, Jul. 21, 1998.
Japan Servo Co. Ltd.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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