Chairs and seats – Movable back – Tiltable
Reexamination Certificate
2008-01-29
2008-01-29
McPartlin, Sarah B (Department: 3636)
Chairs and seats
Movable back
Tiltable
Reexamination Certificate
active
11317799
ABSTRACT:
Disclosed is a bracket angle adjustment mechanism which includes external-tooth and internal-tooth gears having improved tooth shapes allowing an operating force for rotating a control shaft to be reduced. In the bracket angle adjustment mechanism, each of external teeth (14b) of the external-tooth gear14has a half-round shape having a center defined by a single point “a” on a reference circle PC (14), in a region of an addendum T1between the reference circle PC (14) and a tip circle AC (14), and an undercut shape in a region of a dedendum T2between the reference circle PC (14) and a root circle DC. Further, each of internal teeth (15b) of the internal-tooth gear (15) has an arc shape free of interference with the half-round-shaped addendum region.
REFERENCES:
patent: 4149431 (1979-04-01), Rouverol
patent: 4302047 (1981-11-01), Esser
patent: 5096261 (1992-03-01), Baloche
patent: 5188571 (1993-02-01), Boltze et al.
patent: 5716159 (1998-02-01), Tomikawa
patent: 5871414 (1999-02-01), Voss et al.
patent: 7086699 (2006-08-01), Addison et al.
patent: 7090298 (2006-08-01), Lange
patent: 2005/0110322 (2005-05-01), Cha
patent: 2005/0231017 (2005-10-01), Lange
patent: 63-47443 (1994-12-01), None
patent: 7-79740 (1995-08-01), None
patent: WO 03/043847 (2003-05-01), None
Casella Anthony J.
Delta Kogyo Co. Ltd.
Hespos Gerald E.
McPartlin Sarah B
LandOfFree
Bracket angle adjustment mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bracket angle adjustment mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bracket angle adjustment mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3950527