Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Reissue Patent
2005-09-29
2008-09-16
Barrera, Ramon M (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
C310S036000
Reissue Patent
active
RE040503
ABSTRACT:
A rotary actuator (16) includes a rotor (48) which is disposed in a housing (34) between first and second pole pieces (42and44) of a stator (40). The rotor (48) is rotatable relative to the stator (48) between an unactuated position (FIG.4) and an actuated position (FIG.5). During rotation of the rotor (48), the axial extent of a first working air gap (66) between the rotor and a first pole piece (44) of the stator (40) remains constant. However, the axial extent of the working air gap (64) between the rotor (48) and the second pole piece (42) of the stator (40) decreases as the rotor moves from the unactuated position to the actuated position. In a preferred embodiment, the rotor lobes are made so that the net axial force of all of the rotor lobes is substantially zero thereby reducing stress on the rotor shaft support bearings.
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European Search Report completed May 6, 2003 in corresponding European Application No. EP 01 30 7797.
Communication pursuant to Article 96(2) EPC issued by the European Patent Office on Dec. 23, 2005.
Isliker Magnete, Swiss Application No. CH 659,725—partial translation, no date.
Barrera Ramon M
SAIA-Burgess Inc.
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