Motors: spring – weight – or animal powered – Spring – With winding means
Reexamination Certificate
2006-06-27
2006-06-27
Fenstermacher, David M. (Department: 3682)
Motors: spring, weight, or animal powered
Spring
With winding means
C185S04000C, C185S039000, C185S011000
Reexamination Certificate
active
07066301
ABSTRACT:
A manual override mechanism is presented for a motor-driven linear actuator that allows the output rack and pinion of the actuator to be manually positioned. Once positioned, the output may be locked by a locking mechanism to prevent this output from translating to its quiescent position. When incorporated in a spring-return linear actuator, the manual override may be used to apply a preload on the spring before the driven device is connected. When the actuator is used to drive a valve or damper, the preload applies a positive closing force on the valve or damper in its zero position to ensure a tight closure of the valve or damper. The locking mechanism engages the gear train and opposes the closing force applied by the spring return of the actuator. To disengage the locking mechanism automatically, the motor applies a forward kick to the gear train. Manual disengagement is also provided.
REFERENCES:
patent: 4333489 (1982-06-01), Magill et al.
patent: 4416611 (1983-11-01), Zivny
patent: 4545363 (1985-10-01), Barchechat et al.
patent: 4581987 (1986-04-01), Ulicny
patent: 4595081 (1986-06-01), Parsons
patent: 5310021 (1994-05-01), Hightower
patent: 5529282 (1996-06-01), Lebkuchner
patent: 5758684 (1998-06-01), Hudson et al.
patent: 5988319 (1999-11-01), Hudson et al.
patent: 6725976 (2004-04-01), Oh et al.
patent: 0 903 522 (1999-03-01), None
Oh Michael Hung-Sun
Parsons Gerald R.
Fenstermacher David M.
Invensys Building Systems Inc.
LandOfFree
Linear actuator having manual override and locking 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 Linear actuator having manual override and locking mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linear actuator having manual override and locking mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3699176