Bridges – Gangway – ramp – or dock leveler
Reexamination Certificate
2007-06-05
2007-06-05
Hartmann, Gary S (Department: 3671)
Bridges
Gangway, ramp, or dock leveler
C472S089000
Reexamination Certificate
active
10564676
ABSTRACT:
A collapsible ramp (100) comprising a collapsible deck (102) and a collapsible support structure (104). The deck (102) is composed of plural transverse panels (106, 110, 112, 114, 116) selectively joinable by tongue and groove connections (120, 122) and permanently interconnected by filament connecting means or hinges which allow the deck (102) to be rolled or folded. The support structure (104) includes foldable longitudinal members (126) which are interconnected by collapsible brace arms (142) and have foldable legs (148, 150) provided with feet (160) including screw threaded ground engaging members (168, 186). Protrusions (124) on the panels engage recesses (146) in the longitudinal members (126). The lowermost panel (106) includes a tapered distal edge (108) for facilitating ramp entry and the upper panel (116) has a rounded upper distal edge (118) for safety reasons. An upper surface (188) of the deck (102) substantially defines a transition curve making it particularly suitable for launching skaters and the like for airborne maneuvers.
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