Electricity: motive power systems – Limitation of motor load – current – torque or force
Reexamination Certificate
2005-05-24
2005-05-24
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Limitation of motor load, current, torque or force
C318S264000, C318S265000, C318S468000, C049S028000, C049S031000
Reexamination Certificate
active
06897630
ABSTRACT:
An operator system and related methods (10) for sensing forces on a movable barrier (12) includes a motor (52), a trolley (30), and a trolley arm (34) having a first end slidably supported by the trolley (38) and a second end coupled to the movable barrier. The motor moves the trolley arm which in turn moves the movable barrier. A force detection mechanism (68) is coupled to the motor to determine a first component force value applied by the motor. A controller (54) receives the first component force value and determines a detected force value by scaling the first component force value with a second component force value derived from an angular position of the trolley arm's first end with respect to the trolley. The angular position of the trolley arm may be fixed or variable. An angle potentiometer (72) is coupled to the trolley arm to generate an angle signal for use as the second component force value when the trolley arm's angular position is allowed to vary.
REFERENCES:
patent: 3909980 (1975-10-01), Courtney et al.
patent: 4311225 (1982-01-01), Tsubaki et al.
patent: 4408146 (1983-10-01), Beckerman
patent: 4726145 (1988-02-01), Rokicki
patent: 5218282 (1993-06-01), Duhame
patent: 5278480 (1994-01-01), Murray
patent: 5798681 (1998-08-01), Chang
patent: 5929580 (1999-07-01), Mullet et al.
patent: 5998950 (1999-12-01), Fitzgibbon et al.
patent: 6005361 (1999-12-01), Grinewitschus et al.
patent: 6111374 (2000-08-01), Fitzgibbon et al.
patent: 6118243 (2000-09-01), Reed et al.
patent: 6161438 (2000-12-01), Mullet et al.
patent: 6209262 (2001-04-01), Mathis
patent: 6246196 (2001-06-01), Fitzgibbon et al.
patent: 6326751 (2001-12-01), Mullet et al.
patent: 6605910 (2003-08-01), Mullet et al.
patent: 6806665 (2004-10-01), Fitzgibbon et al.
patent: 20030192254 (2003-10-01), Brookbank et al.
Bennett, III Thomas B.
Murray James S.
Leykin Rita
Renner Kenner Greive Bobak Taylor & Weber
Wayne-Dalton Corp.
LandOfFree
System and related methods for sensing forces on a movable... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and related methods for sensing forces on a movable..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and related methods for sensing forces on a movable... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3382474