US 7,536,801 B2
Laser leveling device
Yuexiang Zhang, Nanjing (China)
Assigned to Chervon Limited, (China)
Filed on Nov. 27, 2007, as Appl. No. 11/986,888.
Claims priority of application No. 2006 2 0125817 U (CN), filed on Nov. 27, 2006.
Prior Publication US 2008/0120854 A1, May 29, 2008
Int. Cl. G01C 9/00 (2006.01); G01C 5/00 (2006.01)
U.S. Cl. 33—451  [33/286; 33/DIG. 21] 18 Claims
OG exemplary drawing
 
1. A laser leveling device, comprising:
a body having a cavity formed therein;
a power source;
a laser module which is movable between a first position and a second position, the laser module comprising a laser unit for emitting a laser beam;
wherein when the laser module is in the first position, the laser unit is positioned within said cavity and disconnected from the power source; and wherein the laser module is in the second position, the laser unit is positioned outside the cavity and the laser unit is automatically electrically connected to the power source for emitting a visible laser beam from the laser unit.