Geometrical instruments – Straight-line light ray type – Alignment device
Reexamination Certificate
2006-11-14
2006-11-14
Guadalupe-McCall, Yaritza (Department: 2859)
Geometrical instruments
Straight-line light ray type
Alignment device
C033S281000, C033S291000, C033SDIG021, C372S109000
Reexamination Certificate
active
07134212
ABSTRACT:
A laser level disposable on a reference surface includes a housing, a pendulum pivotably connected to the housing, a first laser diode disposed on the pendulum for emitting a first laser beam along a first path, a first lens disposed on the pendulum in the first path for converting the first laser beam into a first planar beam, the first planar beam forming a first line on the reference surface, a second laser diode disposed on the pendulum for emitting a second laser beam along a second path, and a second lens disposed on the pendulum in the second path for converting the second laser beam into a second planar beam, the second planar beam forming a second line on the reference surface, wherein the first and second lines are substantially perpendicular and non-intersecting.
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Marshall James D.
Sergyeyenko Oleksiy P.
Black & Decker Inc.
Guadalupe-McCall Yaritza
Muller Wesley W.
Shapiro Bruce S.
Yun John
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