Electrical generator or motor structure – Dynamoelectric – Reciprocating
Reexamination Certificate
2011-04-26
2011-04-26
Kramer, Devon C (Department: 3746)
Electrical generator or motor structure
Dynamoelectric
Reciprocating
C310S181000, C417S417000
Reexamination Certificate
active
07932647
ABSTRACT:
An electromagnetic reciprocating fluid apparatus includes a magnetic circuit device in which magnetic pole members project inward from an annular magnetic circuit member so as to oppose each other. The magnetic pole members and the annular magnetic circuit member have a uniform thickness. First and second additional annular magnetic circuit members are set on both sides of the annular magnetic circuit member to constitute a part of the magnetic circuit device, thereby minimizing the increase in magnetic reluctance due to magnetic flux concentration at the joints between the magnetic pole members and the annular magnetic circuit member.
REFERENCES:
patent: 2954917 (1960-10-01), Bayer
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patent: 3947155 (1976-03-01), Bidol
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patent: 5222878 (1993-06-01), Osada et al.
patent: 6540491 (2003-04-01), Tanabe
patent: 0770779 (1997-05-01), None
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Office Action issued Jun. 18, 2008 in Japanese patent application No. 2005-091199 (with translation).
Combined Search and Examination Report issued in UK on Jun. 23, 2006.
Nakao Haruki
Yamamoto Kunihiro
Brinks Hofer Gilson & Lione
Hamo Patrick
Kramer Devon C
Nitto Kohki Co. Ltd.
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