Magnetic scale
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 1, 2009
Grant Date -
Oct 5, 2006
app pub date -
Mar 29, 2006
filing date -
Mar 31, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed herein is a magnetic scale including a pipe, a strip-shaped magnetic member having a one side surface in the direction across the thickness thereof as a contact surface adapted to be closely attached to the inner surface of the pipe and the other side surface opposite to the one side surface as a back surface, the magnetic member being inserted in the pipe so as to extend straight in the longitudinal direction of the pipe, the magnetic member being formed with magnetic marks provided by a plurality of N poles and S poles alternately arranged in the longitudinal direction of the magnetic member, and a retainer member inserted in the pipe to press the back surface of the magnetic member toward the contact surface of the magnetic member, thereby maintaining a closely contact condition of the contact surface to the inner surface of the pipe. Accordingly, the magnetic member can be reliably protected to thereby improve its durability.
First Claim
Other Claims data not available
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