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:
Apr. 28, 1998
Filed:
Oct. 17, 1995
Applicant:
Inventor:
Gregory J Gerhard, Seattle, WA (US);
Assignee:
Applied Precision, Inc., Issaquah, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 80 ; 310 12 ;
Abstract
A linear motion micropositioning device employs a housing containing fixed, electrically excited stators. A rotating permanent magnet rotor is directly attached to a spindle of a precision lead screw. The stators are provided with sufficient axial depth to permit the rotor to rotate and reciprocate axially while under continuous magnetic influence of the stators.