Electromagnetic Transducer Apparatus
AssigneeThe Hymatic Engineering Company Limited
InventorChun Fai Cheuk
Life of this patent
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Abstract
An electromagnetic transducer apparatus (10) includes a core (30, 31) providing a pair of yokes (34, 35) between which there is an air gap (38, 39), at least one coil (32) disposed about the core (30, 31), an armature (14) moveable in the air gap (38, 39) in response to the coil (32) being energised, the armature (14) being mounted between a pair of suspension springs (22, 23), and characterised in that the armature (14) includes a cylinder (14) in which is disposed a piston (12) which is immovable relative to the core (30, 31).
Claims20
An electromagnetic transducer apparatus including a core providing a pair of yokes between which there is an air gap, at least one coil disposed about the core, an armature moveable in the air gap in response to the coil being energised, the armature being mounted between a pair of suspension springs, and characterised in that the armature includes a cylinder in which is disposed a piston which is immovable relative to the core.
(canceled)
A pressure pulsator or pump which includes an electromagnetic transducer apparatus including a core providing a pair of yokes between which there is an air gap, at least one coil disposed about the core, an armature moveable in the air gap in response to the coil being energised, the armature being mounted between a pair of suspension springs, and characterised in that the armature includes a cylinder in which is disposed a piston which is immovable relative to the core.
An electrical generator which includes an electromagnetic transducer apparatus including a core providing a pair of yokes between which there is an air gap, at least one coil disposed about the core, an armature moveable in the air gap in response to the coil being energised, the armature being mounted between a pair of suspension springs, and characterised in that the armature includes a cylinder in which is disposed a piston which is immovable relative to the core.
(canceled)
Dependencies are inferred from the claim text.