Conveyors: power-driven – Conveyor section – Endless conveyor
Reexamination Certificate
2008-07-08
2008-07-08
Bidwell, James R (Department: 3651)
Conveyors: power-driven
Conveyor section
Endless conveyor
C196S139000, C193S0350TE
Reexamination Certificate
active
07395918
ABSTRACT:
An extendible conveyor apparatus includes a first end, a second end, and an adjustable-length bed of rollers extending in between them. A sliding frame (or extension) mounted moveably on a support structure supports a fixed number of the rollers, while a moveable string of rollers connected to a second end of the frame feeds additional rollers into and out of position between the second end of the conveyor apparatus and the frame according to frame movement between retracted and extended positions of the frame. In one embodiment, the bed of rollers includes at least some motor-driven rollers (MDRs) and the string of rollers withdraws to a position below the bed using an extend/retract drive mechanism having a drive chain disposed in a loop, the frame being connected to an upper side of the loop for frame-moving purposes and the string of rollers being connected to a lower side of the loop for string withdrawal purposes.
REFERENCES:
patent: 3289816 (1966-12-01), Baechli
patent: 3434584 (1969-03-01), Winkler
patent: 3780843 (1973-12-01), McGovern et al.
patent: 3876060 (1975-04-01), Stease
patent: 3944037 (1976-03-01), Stease
patent: 4681501 (1987-07-01), Edwards et al.
patent: 5307917 (1994-05-01), Hall
patent: 5685416 (1997-11-01), Bonnet
patent: 5755308 (1998-05-01), Lindstrom et al.
patent: 2004/0094391 (2004-05-01), Schaum et al.
patent: 4023585 (1991-09-01), None
Technical Data Sheet of the Sparks Belting Company of Grand Rapids, Michigan for Powered Conveyor Rollers (which the Patent Office examiner may consider as prior art).
Bidwell James R
Hanson Loyal McKinley
LandOfFree
Extendible conveyor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Extendible conveyor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extendible conveyor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2790658