The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 2009
Filed:
Oct. 19, 2006
Applicants:
Gary Peter Widdowson, Hong Kong, HK;
Dazhang Liao, Hong Kong, HK;
Inventors:
Gary Peter Widdowson, Hong Kong, HK;
Dazhang Liao, Hong Kong, HK;
Assignee:
ASM Assembly Automation Ltd., Hong Kong, HK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 41/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A linear motor is provided that includes a magnetic assembly, a movable element and a coil assembly that is operative to interact with the magnetic assembly to drive the movable element along a direction. The coil assembly further includes a first coil section having a first motor force constant and a second coil section having a second motor force constant that is lower than that of the first coil section for driving the movable element along the said direction.