US 7,500,317 B2
Portable self-leveling laser emitter with plumb beam
Roman Steffen, Rebstein (Switzerland); and Detlef Juesten, Sennwald (Switzerland)
Assigned to Hilti Aktiengesellschaft, Schaan (Liechtenstein)
Filed on Jul. 17, 2007, as Appl. No. 11/879,678.
Claims priority of application No. 10 2006 000 359 (DE), filed on Jul. 20, 2006.
Prior Publication US 2008/0072439 A1, Mar. 27, 2008
Int. Cl. G01C 15/00 (2006.01); G01C 9/12 (2006.01)
U.S. Cl. 33—291  [33/286; 33/DIG. 21] 7 Claims
OG exemplary drawing
 
1. A self-leveling laser emitter, comprising a portable housing (2); a beam unit (5) mounted in the housing (2) so as to be swivelable in two dimensions in a self-leveling manner at a bearing point (4) arranged in an area of one third to two thirds of the height (H) of the housing exclusively by the downwardly directed gravitational force (G), the beam unit (5) emitting two axis beams (7) in axial directions, including a plumb beam (6); and at least one first beam source (8a) arranged in the beam unit (5) above the bearing point (4) and at least one second beam source (8b) arranged below the bearing point (4).