Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 10, 2011
Patent Application Number
12013463
Date Filed
January 13, 2008
Patent Primary Examiner
Patent abstract
An apparatus for supporting upon an underlying surface has an adjustable backing plate structure. The backing plate structure has a main backing plate, first and second connecting racks extending from respectively opposite sides of the main backing plate, and a supporting member connected to the first and second connecting racks. The support member is in the form of a roller and is movable between a first position extending in parallel spaced relation to an end of the main backing plate and a second position contacting a bottom surface of the main backing plate. Each of the first and second connecting racks has a locating end received in a slot of the main backing plate so as to be adjustably slidable therein.
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