Hinged ramp assembly

Details Hinged ramp assembly Hinged ramp assembly

2009-08-04

2011-12-13

Hartmann, Gary S (Department: 3671)

Bridges

Gangway, ramp, or dock leveler

Reexamination Certificate

active

08074314

ABSTRACT:
A ramp is assembled from first and second boards such that the first and second boards are foldable relative to one another. Rail assemblies comprising first and second channels are fastened along opposing sides of the boards. First and second hinge members, fastened to the sides of the first and second channels, pivotally couple the channels. Two central hinge members are mounted on the boards respectively to pivotally couple the boards at a central location between the opposing sides of the boards. An auxiliary hinge member is supported on the bottom of the first channels to provided added support to the pivotal coupling between the first and second channels. The auxiliary hinge member and the central hinge members are interchangeable with one another.

REFERENCES:
patent: 4795304 (1989-01-01), Dudley
patent: 4979867 (1990-12-01), Best
patent: D338760 (1993-08-01), Harrah
patent: D401731 (1998-11-01), Jeruss
patent: 5988725 (1999-11-01), Cole
patent: 6119634 (2000-09-01), Myrick
patent: 6139249 (2000-10-01), Lucht
patent: 6764123 (2004-07-01), Bilyard
patent: 7237294 (2007-07-01), Lensing
patent: 7299517 (2007-11-01), Adinolfe
patent: D617972 (2010-06-01), Lucht
patent: 2004/0022613 (2004-02-01), Kellogg et al.

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