Bridges – Gangway – ramp – or dock leveler
Patent
1994-04-08
1996-01-16
Buiz, Michael Powell
Bridges
Gangway, ramp, or dock leveler
14 711, E01D 100
Patent
active
054837154
ABSTRACT:
A vehicle service ramp comprising a unitary ramp having an external structure including a rear wall, a pair of side walls and a front. The front includes a surface sloping upward to a top flat plane. The ramp has an internal structure forming a honeycomb pattern of supporting walls extending between the rear wall, side walls and front. The ramp is formed from a foamed polymer having a tensile strength sufficient to support its rated load bearing capacity.
REFERENCES:
patent: 5033146 (1991-07-01), Fogarty et al.
patent: 5253410 (1993-10-01), Mortenson
"Plastic Technology" by Robert V. Milby, 1973 pp. 244-246 and 254-255.
Fogarty William W.
Friday Phillip M.
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