Geometrical instruments – Straight-line light ray type – Level
Reexamination Certificate
2007-05-17
2009-02-24
Bennett, G. Bradley (Department: 2841)
Geometrical instruments
Straight-line light ray type
Level
C033S286000, C033SDIG021
Reexamination Certificate
active
07493701
ABSTRACT:
The present invention discloses a self-leveling laser apparatus, of which the pendulum can be locked, and a method for controlling the same. The self-leveling laser apparatus of the present invention comprises a housing, a pendulum hanging within the housing, at least one laser generator fixed on the pendulum, a power source electrically connected with the laser generator, and a locking device for fixing the pendulum. The locking device includes a motor, and a locking member which is activated by the motor and movable between a fixed position and a released position. The locking member has a locking surface, and the pendulum has a contacting surface. When the locking member is in the fixed position, the locking surface thereof contacts the contacting surface of the pendulum. When the locking member is in the released position, the locking surface thereof does not contact the contacting surface of the pendulum. The pendulum is fixed from swinging when the self-leveling laser apparatus is not in use so as to avoid unexpected damage or loss of precision.
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Bennett G. Bradley
Chevron Limited
Cohen Johnson Amy
McDermott Will & Emery LLP
LandOfFree
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