Geometrical instruments – Straightedge type – Cord type
Reexamination Certificate
2007-04-10
2007-04-10
Gutierrez, Diego (Department: 2859)
Geometrical instruments
Straightedge type
Cord type
C033S770000, C033S758000
Reexamination Certificate
active
11207952
ABSTRACT:
The motorized chalk box includes a chalk line reel having an internal ring gear. An electric motor drives a pinion gear, which engages the ring gear, thus resulting in a very compact assembly. The motor and gearing are sealed from the chalk dust reservoir, through which the chalk line passes. The housing comprises two components secured by a single screw to facilitate minor maintenance. A spring loaded, automatically releasing line clip extends from the distal end of the chalk line. The line clip includes a spring-loaded sleeve, which is biased against the anchor (screw, nail, etc.) when in place. Releasing the tension on the chalk line causes the sleeve to spring against the anchor, thus kicking the line clip away from the anchor. The chalk box may thus be operated using only one hand, greatly improving safety for workers in elevated environments.
REFERENCES:
patent: 680557 (1901-08-01), Wilson
patent: 1100325 (1914-06-01), Pronovost
patent: 1290350 (1919-01-01), Rand
patent: 1407429 (1922-02-01), Simmons
patent: 2549287 (1951-04-01), Brennan
patent: 2770883 (1956-11-01), Hackney
patent: 3183595 (1965-05-01), Jopperi
patent: 4561189 (1985-12-01), Hirneise
patent: 4565011 (1986-01-01), Karger
patent: 4765557 (1988-08-01), Kahmann
patent: 4773162 (1988-09-01), Lin
patent: 4819337 (1989-04-01), Noyes
patent: 5042613 (1991-08-01), Hermann
patent: 5163230 (1992-11-01), Gast
patent: 5212875 (1993-05-01), Corso
patent: 5444919 (1995-08-01), Alves
patent: 5470029 (1995-11-01), Dufour
patent: 5509616 (1996-04-01), Millen et al.
patent: 5683055 (1997-11-01), Dufour
patent: 5822874 (1998-10-01), Nemes
patent: 5920997 (1999-07-01), Girtman
patent: 5937532 (1999-08-01), Eirich et al.
patent: 5947790 (1999-09-01), Gordon
patent: 6289597 (2001-09-01), Beyers
patent: D454804 (2002-03-01), Zuniga
patent: 6705018 (2004-03-01), Guhse
patent: D490329 (2004-05-01), Glessman
patent: 6745485 (2004-06-01), Shor
patent: D493377 (2004-07-01), Brugger
patent: 6931743 (2005-08-01), Scarborough
patent: 2002/0194744 (2002-12-01), Shor
patent: 2003/0221325 (2003-12-01), Dekort
patent: 55-052865 (1980-04-01), None
patent: 63-082302 (1988-04-01), None
Website, “http://www.kaufmann-goefis.at/en/10products/99schlagschnur,” Kaufmann Chalk Line Marker, One Page, Printed Mar. 15, 2005.
Elliott Bill
Leslie Troy A.
Cohen Amy R.
Gutierrez Diego
Litman Richard C.
LandOfFree
Motorized chalk box does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motorized chalk box, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motorized chalk box will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3744327