Fire escape – ladder – or scaffold – Wall- or floor-attached
Reexamination Certificate
2007-10-16
2007-10-16
Chin-Shue, Alvin (Department: 3634)
Fire escape, ladder, or scaffold
Wall- or floor-attached
C182S037000, C182S102000, C182S133000, C187S239000
Reexamination Certificate
active
11372581
ABSTRACT:
The elevating device of the present invention is comprised of first, second, and third dovetail members that are interlockingly engaged. First dovetail member is secured to an object or an independent surface such as a tree or a ladder. First and second dovetail members are stationary and third dovetail member is moveable. Slide bars are secured to third dovetail member. Slide bars slidably engage a guide track. There is a gear that engages slots in the second dovetail member elevating third dovetail member as the slide bars slidably engage the guide track. There is a platform for holding people or objects that is secured to third dovetail member. As the gear rotates and elevates third dovetail member, the platform secured thereto is also elevated.
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Printout of webpages from www.isgproducts.com for “Headwaters Construction Materials” dated Mar. 10, 2005.
Printout of webpages for www.tapcoint.com for “Tapco International Corporation” dated Mar. 10, 2005.
Chin-Shue Alvin
Cohen & Grigsby P.C.
King Tool & Manufacturing Company, Inc.
Passerin, Esq. Alicia M.
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