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| Number | Title | Issue Date |
| 7454839 | Portable reference laser unit and attachment accessory A laser unit for providing at least one of a laser level line and a laser plumb line, where the unit includes both a locked mode and an unlocked (or auto-leveling) mode. In the unlocked mode, the laser unit is configured to provide at least one of a level line or a ... | 11/25/2008 |
| 7310887 | Intersecting laser line generating device A line generating device generates two fan-shaped beams of light at an angle to each other, and projects the beams onto an adjacent surface, where the beams are visible as lines on the surface. A user has access to the intersection of the lines, so that the intersec... | 12/25/2007 |
| 7287336 | Apparatus for producing a visible line of light on a surface, particularly a wall An apparatus and method for efficiently generating a visible line of light on a surface such as a wall or a floor for the purpose of facilitating the layout process used in construction. Reference marking elements on the instrument correspond to the light beam's pos... | 10/30/2007 |
| 7266897 | Self-aligning, self plumbing baseline instrument A self aligning baseline instrument including a first light assembly operable to generate a first vertical light plane, a second light assembly operable to generate a second vertical light plane at a predetermined angle to the first vertical light plane, a third lig... | 09/11/2007 |
| 7181853 | Modular laser layout system A light emitting module and a modular light emitting system with leveling capability. The system relates to light-based (e.g. lower-based) layout tools of the type used in the construction industry. More specifically, the system relates to a modular light emitting s... | 02/27/2007 |
| 7178250 | Intersecting laser line generating device A line generating device generates two fan-shaped beams of light at an angle to each other, and projects the beams onto an adjacent surface, where the beams are visible as lines on the surface. A user has access to the intersection of the lines, so that the intersec... | 02/20/2007 |
| 7174647 | Laser line projector with spherically rotatable support and level/plumb indicators for the support A spherically rotatable support for a light image projector has level and/or plumb indicators for leveling or plumbing a central reference frame of its spherical rotation. A projected light image, such as a laser line segment of relatively short length may be succes... | 02/13/2007 |
| 7167500 | Laser apparatus such as a construction laser apparatus The invention relates to a laser apparatus as construction laser apparatus (10) comprising a light source accommodated inside a housing (12). For providing an increased protection of the apparatus and for adjusting the housing and thus the laser plane ... | 01/23/2007 |
| 7134212 | Laser level 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 pat... | 11/14/2006 |
| 7121010 | Line generating device A line generating device may include a housing having a bottom surface, a top surface, a front surface connecting the top and bottom surfaces, a rear surface connecting the top and bottom surfaces, and a side surface connecting the top and bottom surfaces, a support... | 10/17/2006 |
| 7111406 | Laser calibration apparatus and method A laser calibration device includes a housing and a pendulum pivotally coupled to the housing and suspending downwards therefrom. A laser deck is mounted to the pendulum. At least one laser for emitting a laser line is mounted to the laser deck. The laser includes a... | 09/26/2006 |
| 7076880 | Two wire circuit for a laser pendulum A two wire laser control circuit for a laser leveler includes a switch mounted on a housing and having an electrical current passing therethrough. The switch has a first position and a second position. A diode bridge is mounted on a pendulum. A plurality of laser di... | 07/18/2006 |
| 7059057 | Laser level 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, and a lens disposed on the pendulum in the first path ... | 06/13/2006 |
| 7051446 | Construction layout and angle measurement tool A construction layout and angle measurement tool includes opposite working sides having unique indicia for establishing angles from side edges or corners of building materials. When used with a reference line, and when attached to the workpiece, the tool allows site... | 05/30/2006 |
| 6996910 | Laser leveling device for generating parallel lines A laser leveling device includes a laser instrument having a base rotatably received in a cavity of a housing and having a light emitting device to generate a light beam, such as a line-shaped light beam. One or more batteries may be used to energize the light emitt... | 02/14/2006 |
| 6964106 | Laser level An improved laser level has a housing and a first shaft connected to the housing. Two bearings are disposed on the first shaft. A gimbal body is disposed on the two bearings. A second shaft is connected to the gimbal body. A third bearing is disposed on the second s... | 11/15/2005 |
| 6948252 | Light projecting goniometer This device is a handheld, battery-operated instrument that utilizes light beams to project visible lines for increasing the accuracy in determining angles. A linear potentiometer is incorporated at the pivot point between the two diodes and measures a voltage chang... | 09/27/2005 |
| 6938350 | Apparatus for producing a reference plane The present invention provides an apparatus and method for projecting a reference plane. The invention features emitting a light beam, splitting the light bean into two or more resulting beams, and converting the resulting beams into respective projected lines. The ... | 09/06/2005 |
| 6931739 | Multidirectional laser indicator A laser indicator includes a weight mechanism having a bracket with a weight secured to the bracket in a manner where the weight is suspended by gravity. A plurality of laser generators are arranged about the weight, including a horizontal beam generator, a center l... | 08/23/2005 |
| 6922901 | Light leveling device having remote control A light leveling device includes a stationary light instrument received in a housing, and a rotatable light instrument rotatably attached to the housing, to allow the rotatable light instrument to be rotated and adjusted relative to the housing and the stationary li... | 08/02/2005 |
| 6914930 | Laser level 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, and a lens disposed on the pendulum in the first path ... | 07/05/2005 |
| 6829834 | Multi-angle self-leveling line generation A self-leveling tool for projecting a line of light along a wall or other vertical surface at one of a plurality of predetermined angles. The tool self-aligns to emit a plane of light at one of the predetermined angles (e.g., 0, 90, 180 or 270 degrees), thereby proj... | 12/14/2004 |
| 6810595 | Laser angle guide assembly for computed tomography and method for the same A laser angle guide assembly has a stand and a laser guide. The laser guide is rotatably attached to the stand and has a laser pointer, a transparent column, a guiding rod, an index stick and a protractor. The laser pointer has a head for emitting a laser. The trans... | 11/02/2004 |
| 6792685 | Stabilized laser plumb A laser plumb includes a laser, and a mass that is rotatable about a spin axis to stabilize the laser. The mass is mounted to a support to be pivotable about at least one axis, and preferably two axes. The two axes are perpendicular to each other and the spin axis. ... | 09/21/2004 |
| 6782034 | Laser plumbing and leveling instrument which adjusting height of horizontal line The present invention discloses a laser-plumbing leveler with adjustable height of the horizontal line, which comprises a laser emitting device, a laser line (plane) projecting optical system, and a laser line (plane) rotating and/or moving unit, wherein the laser l... | 08/24/2004 |
| 6754969 | Self-leveling constructional laser A constructional laser including a self-leveling optical system located in the laser housing (2) and generating a visible plumb light beam (5a) and/or visible horizontal light beam (5b), and a stand (7) fixedly secured to th... | 06/29/2004 |
| 6742269 | Verticality/horizon indicator for construction A laser verticality/horizon indicator for construction is provided that realizes irradiation of laser beam, and indication of both a vertical point and a horizontal line using optical refraction. The laser verticality/horizon indicator embodies a scientific and syst... | 06/01/2004 |
| 6694630 | Multiple-axis laser emitter with optical beam splitter A multiple axis laser emitter (1) comprising an optical beam splitter (4) having at least two reflectively coated mirror surfaces (7a, 7b, 7c, 7d) oriented perpendicular to each other and each oriented at an angle of 45° to a collimated main beam (H) of ... | 02/24/2004 |
| 6688009 | Laser survey instrument A laser survey instrument, comprising a laser projector for projecting a laser beam onto a plane by rotary irradiation, a tilting unit for tilting the laser projector in two directions running perpendicularly each other and a tilt setting unit for setting... | 02/10/2004 |
| 6651355 | Range finder for bow hunter A device for determining the range/height of distant objects using the triangulation method. The device includes a palm-sized housing having merely four main components; (1) a retractable tape measure; (2) a sighting slot; (3) a pendulum and (4) a calibra... | 11/25/2003 |
| 6640453 | Clinometer The current invention discloses an improved clinometer which can be used as an inexpensive form of builder's level or transit due to its capability of orienting itself to a predetermined vertical angle, and maintaining said angle through the use of gravit... | 11/04/2003 |
| 6625895 | Servo-controlled automatic level and plumb tool A method and apparatus for leveling at least one output light beam in a construction tool. One embodiment of the apparatus includes a laser optical assembly for producing output light beams that define plumb, level, and right angle beams for use in constr... | 09/30/2003 |
| 6604291 | Self-leveling device A self-leveling device having a modular unitary suspension (1) for a measurement system carrier (2) of a tiltable housing (3), with the carrier oscillating freely in at least one direction, and the device being distinguished by a flexible connector assemb... | 08/12/2003 |
| 6568094 | Compact optical calibrating apparatus for multiple orientations A compact optical calibrating apparatus includes: a housing having a base formed on a bottom of the housing, a horizontality calibrator universally pendulously mounted in the housing, a plurality of illuminators embedded or secured in a plumb pendulously ... | 05/27/2003 |
| 6536122 | Laser line beam emitting apparatus having functions of laser marking or plumb instrument, or leveler There is provided a laser line beam emitting apparatus with high durability. The apparatus according to the present invention has avoidance of deformed or damaged shafts by construction where possible free maintenance of the balance of the pendulum being ... | 03/25/2003 |
| 6101728 | Versatile VH laser plumb A plumb system for construction projects having a laser module embedded within includes a spring or the like device acting as a connecting device to a tripod or the like apparatus for projecting a vertical laser beam to a vertical end point, from the floo... | 08/15/2000 |
| 6035540 | Automatic optical levelling, plumbing, and verticality-determining apparatus An automatic optical levelling, plumbing and verticality-determining appartus includes: a base, a supporting and driving means adjustably standing on the base for supporting a frame having a plumb device secured to a horizontality calibrator universally p... | 03/14/2000 |
| 5992029 | Automatic laser plumb line A laser line device suitable for construction. The laser line instrument automatically aligns a vertical laser beam so that the beam is perpendicular to the earth's core. The laser module is connected to a pendulum which serves to automatically level the ... | 11/30/1999 |
| 5839199 | Laser gradient setting device A laser gradient setting device, having such arrangement that a reference laser beam with a gradient emitted and a reference laser beam in vertical direction is emitted, whereby the laser gradient setting device can be easily positioned by the reference l... | 11/24/1998 |
| 5790248 | Laser beam levelling device The present invention provides a laser beam levelling device which is provided with two rotatable heads wherein a horizontal laser plane can be emitted from the first head which is rotatable round a vertical axis and a vertical laser plane can be emitted ... | 08/04/1998 |
