The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 1992
Filed:
Sep. 12, 1990
Applicant:
Inventor:
Michael A Middleton, Cupertino, CA (US);
Assignee:
Laserline, Inc., Mountain View, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C / ;
U.S. Cl.
CPC ...
356250 ; 356138 ; 33291 ;
Abstract
A simple structure for providing a level laser beam. A pendulum is suspended by at least two suspension supports along the line parallel to a path of a laser beam emitted from a laser. An optical element is mounted on the pendulum to intercept the laser beam and reflect it along a path orthogonal to the first path. The pendulum will maintain the optical element in a vertical alignment, and accordingly the beam reflected off the optical element will be horizontal.