Fire escape – ladder – or scaffold – Platform with elevating or lowering means
Reexamination Certificate
2006-01-03
2006-01-03
Thompson, II, Hugh B. (Department: 3634)
Fire escape, ladder, or scaffold
Platform with elevating or lowering means
C074S425000, C074S424600
Reexamination Certificate
active
06981573
ABSTRACT:
A scaffolding system has a pair of vertical posts supporting a platform traveling vertically on the posts. A traveler device attaches to and engages each of the vertical posts and supports the platform. Each traveler device has a sprocket gear engaging a complementary track extending up the post so that rotation of the gear moves the traveler device along the vertical post and lifts and lowers the platform. The traveler device has a worm type drive gear configured for receiving a driver and meshing with the sprocket gear. The drive gear is operated with a power drill or a crank drive. The platform includes a foot operated brake device providing a back up system to prevent the platform from accidentally dropping.
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Panel Jack™ by ReechCraft, http://www.reechcraft.com/paneljack/index.html, last updated Nov. 18, 2003, 1 page.
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Merchant & Gould P,C,
Reechcraft, Inc.
Thompson II Hugh B.
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