IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
US007197815B2
(12) United States Patent ao) Patent No.: Us 7,197,815 B2
Yasuda et al. (45) Date of Patent: Apr. 3,2007
(54) METHOD OF MANUFACTURING THE ELECTROMAGNETIC ACTUATOR
(75) Inventors: Susumu Yasuda, Tokyo (JP); Futoshi Hirose, Atsugi (JP)
(73) Assignee: Canon Kabushiki Kaisha, Tokyo (JP)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 11/149,531
(22) Filed: Jun. 10, 2005
(65) Prior Publication Data
US 2005/0231310 Al Oct. 20, 2005
Related U.S. Application Data
(62) Division of application No. 09/654,394, filed on Sep. 1, 2000, now Pat. No. 6,943,928.
(30) Foreign Application Priority Data
Sep. 3, 1999 (JP) 11-250281
(51) Int. CI.
H01F 7/06 (2006.01)
(52) U.S. CI 29/606; 29/592.1; 29/596;
29/602.1; 29/605; 205/119; 205/122; 310/12;
310/13; 359/198; 359/199; 359/224; 359/225;
359/877
(58) Field of Classification Search 29/592.1,
29/596,602.1,605,606; 205/119,122; 310/12, 310/14; 359/198, 199, 224, 225, 877 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
3,777,292 A * 12/1973 Fulenwider 335/126
5,025,346 A 6/1991 Tang et al 361/283.1
5,539,267 A 7/1996 Fan et al 310/309
5,629,918 A 5/1997 Ho et al 369/112
