Geometrical instruments – Straight-line light ray type – Structurally installed
Reexamination Certificate
2011-07-26
2011-07-26
Smith, R. A. (Department: 2841)
Geometrical instruments
Straight-line light ray type
Structurally installed
C033S286000, C033SDIG021
Reexamination Certificate
active
07984557
ABSTRACT:
A positioning device for enabling a user to accurately position the outermost end of an extendable member, such as an extension ladder, relative to a fixed, elevated position. The device includes laser light sources that provide angularly disposed laser light beams that terminate at desired points when the outermost end of the extendable member is adjacent to the desired end position. A first laser light beam is arranged to extend parallel to the longitudinal axis of the extendable member, and a second laser light beam is arranged to extend at a predetermined angle relative to the first laser light beam.
REFERENCES:
patent: 2316751 (1943-04-01), Alder, Jr.
patent: 4142798 (1979-03-01), Barbee, Jr.
patent: 4257706 (1981-03-01), Smith
patent: 4281342 (1981-07-01), Ueda et al.
patent: 4396945 (1983-08-01), DiMatteo et al.
patent: 4696574 (1987-09-01), Penney
patent: 4744664 (1988-05-01), Offt et al.
patent: 4836671 (1989-06-01), Bautista
patent: 4908948 (1990-03-01), Gormley
patent: 5144487 (1992-09-01), Hersey
patent: 5335308 (1994-08-01), Sorensen
patent: 5363185 (1994-11-01), Zana
patent: 5383524 (1995-01-01), Rinnemaa
patent: 5403142 (1995-04-01), Stewart
patent: 5757500 (1998-05-01), Rueb
patent: 6115129 (2000-09-01), Holmquist et al.
patent: 6202013 (2001-03-01), Anderson et al.
patent: 6250588 (2001-06-01), Numbers et al.
patent: 6480271 (2002-11-01), Cloud et al.
patent: 6493952 (2002-12-01), Kousek et al.
patent: 6662457 (2003-12-01), Dameron
patent: 6693702 (2004-02-01), Rogers
patent: 6874739 (2005-04-01), Gregory
patent: 6877236 (2005-04-01), Williams
patent: 6894621 (2005-05-01), Shaw
patent: 6966525 (2005-11-01), Schroeder
patent: 7037006 (2006-05-01), Chapman
patent: 7244464 (2007-07-01), Robens et al.
patent: 7270593 (2007-09-01), Klein, II et al.
patent: 7375621 (2008-05-01), Hines
patent: 7434322 (2008-10-01), Walser et al.
patent: 7472009 (2008-12-01), Baldwin
patent: 2007/0025832 (2007-02-01), Rawdon et al.
patent: 01044808 (1989-02-01), None
patent: WO 9009560 (1990-08-01), None
patent: WO 2010126983 (2010-11-01), None
Mangels Alfred J.
Smith R. A.
LandOfFree
Laser-guided positioning device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser-guided positioning device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser-guided positioning device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2623316