Geometrical instruments – Straight-line light ray type – Alignment device
Reexamination Certificate
2001-12-26
2004-04-20
Gutierrez, Diego (Department: 2859)
Geometrical instruments
Straight-line light ray type
Alignment device
C033SDIG002, C033S281000, C033S290000
Reexamination Certificate
active
06722048
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a laser projection apparatus for projecting a point and a line (hereinafter “for point and line”), and in particular, to a laser projection apparatus for point and line that has two projection light-source mechanisms.
2. Description of the Prior Art
Recently, due to the increase of the population in cities, and the scarcity of land, building projects have focused on building upwardly, which means that many skyscrapers have been built up in cities like trees in a jungle. Because skyscrapers are built up from the ground surface, the measuring point for building up, and base line for measuring and demarcating operations, for the base and interior of buildings have become very important key-points.
When the above operations are applied to instrument measurements for demarcating distance or for plumb fixing-point, it can be difficult to create an actual straight line, and it is also difficult to control the placing directions and angles. In addition, because the plumb fixing-point is sometimes interfered with and swung by outside influences (e.g., wind), and further because the legs of the instruments are set up for the convenience of movement or adjustment, it is difficult to accurately make the plumb aim at the starting measuring-point. The quality and procedure of the operation are therefore compromised.
During building construction and decoration construction, the uneven nature of the ground can often make the arrangement and adjustment of the legs of a plumb or instrument difficult to carry out. As a result, it is often difficult to accurately carry out the measurement and demarcation for horizontal and vertical lines because the angle and direction of the measurement may be shifted, and because the measurement may not be able to bring out an actual straight line.
Thus, there remains a need for a laser projection apparatus that overcomes the drawbacks identified above.
SUMMARY OF THE DISCLOSURE
It is an object of the present invention to provide a laser projection apparatus that projects a vertical line that is vertical to the ground surface.
It is another object of the present invention to provide a laser projection apparatus that projects a horizontal line that is parallel to the ground surface, or any projection point that has the same horizontal height.
It is yet another object of the present invention to provide a laser projection apparatus that can accurately project actual horizontal and vertical lines even when the apparatus is rested on an undulated or uneven topography.
It is yet another object of the present invention to provide a laser projection apparatus that minimizes vibration and interference from external influences.
To achieve the above objectives, the present invention provides a laser projection apparatus that has an adjustment platform having a base seat, a platform portion that is adjustably coupled to the base seat, and an adjustment mechanism that is operatively coupled to the base seat and the platform portion to adjust the inclination angle of the platform portion with respect to the base seat. The apparatus also has a frame body that is connected to the adjustment platform, and a column that is suspended by the frame body and which is separated from the adjustment platform by a distance. The apparatus further includes a first projection light-source mechanism that is connected to the column and which projects a straight light that is parallel to a central axis, and a second projection light-source mechanism which is connected to the column and which projects a light ring that is transverse to the central axis.
REFERENCES:
patent: 5212889 (1993-05-01), Lysen
patent: 5272814 (1993-12-01), Key
patent: 5485266 (1996-01-01), Hirano et al.
patent: 5539990 (1996-07-01), Le
patent: 5552886 (1996-09-01), Kitajima et al.
patent: 5724744 (1998-03-01), Bozzo
patent: 5864956 (1999-02-01), Dong
patent: 5872657 (1999-02-01), Rando
patent: 6035540 (2000-03-01), Wu et al.
patent: 6195901 (2001-03-01), Falb
patent: 6202312 (2001-03-01), Rando
patent: 6427347 (2002-08-01), Butler, Sr.
patent: 6539638 (2003-04-01), Pelletier
patent: 2002/0083603 (2002-07-01), Jang
Huang Chao-Chi
Wu Sheng-Ching
Guadalupe Yaritza
Gutierrez Diego
Quarton Inc.
Sun Raymond
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