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:
Dec. 23, 2008
Filed:
Apr. 25, 2006
Bradley Engstrand, Hartford, WI (US);
Bradley Engstrand, Hartford, WI (US);
Phaedrus, LLC, Hartford, WI (US);
Abstract
A collar, a system and a method detect a mark on a rod within an interior of the collar. The mark and the rod move from a first position to a second position within an interior of the collar between a first end and a second end of the collar. A light emitter and/or a light detector is connected to the collar for determining the first position and/or the second position of the mark and/or of the rod within the interior of the collar. An exterior surface of the rod and/or a mark on the rod absorb an amount of light emitted from the light emitter within the interior of the collar. The light detector measures and/or detects an intensity of light within the interior of the collar which is not be absorbed by the mark and/or by the exterior surface of the rod. The intensity of light within the interior of the collar detected by the light detector that is not absorbed by the mark or the exterior surface of the rod corresponds to the first position and/or to the second position of the mark within the interior of the collar.