Bridges – Transportable
Patent
1997-02-06
1999-05-18
Lisehora, James A.
Bridges
Transportable
14 695, 52570, 525921, E01D15/12
Patent
active
059039434
ABSTRACT:
The dockboard in one embodiment includes three upper members and two lower members which can be stored and shipped unassembled and readily assembled in the field for use. Each of the members includes a plurality of spaced apart locking members extending from one side between opposite side edges. The locking members are spaced apart from each other between opposite support edges. The five members are assembled to form a dockboard by engaging selected locking members of the two lower members with selected locking members of the center upper member such that the center upper member overlaps adjacent support edges of the two lower members and sliding the center upper member and the two lower members together. Selected locking members of the two outer end upper members are engaged with the outer locking members of the two lower members and the two outer end upper members are slid onto the assembly to form the dockboard. Adjacent support edges of the upper and lower members have hook and slot side edge locking members to lock adjacent support edges of the upper members together and adjacent side edges of the lower members together.
REFERENCES:
patent: 1356591 (1920-10-01), Baumann
patent: 1381823 (1921-06-01), Griffin
patent: 2132757 (1938-10-01), Paulson
patent: 4147007 (1979-04-01), Eppich
patent: 4368553 (1983-01-01), Perry
patent: 5347672 (1994-09-01), Everard et al.
patent: 5446937 (1995-09-01), Haskins
patent: 5564962 (1996-10-01), Navarette Espinosa
patent: 5566519 (1996-10-01), Almaraz-Miera
Bluff Manufacturing, Inc.
Lisehora James A.
Zobal Arthur F
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