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. 21, 2003
Filed:
Dec. 20, 2001
Hiromi Inoguchi, Tokyo, JP;
Ikuichiro Nawa, Atsugi, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
An electromagnetic linear actuator comprises a movable portion holding an object so that the object is movable up and down with respect to a fixed portion, a guide for constraining the movement of the movable portion except in upward and downward directions, and a base for mounting the guide. The guide comprises a cylindrical bushing fixed onto the base, a guide shaft having a lower end press-fitted into the bushing, and upper and lower dampers directly attached to upper and lower ends of the guide shaft by means of elasticity of the dampers, respectively, so as to limit a stroke of the movable portion and to absorb mechanical shock. Each of the upper and the lower dampers is preferably made of an elastic material such as rubber.