Fire escape – ladder – or scaffold – Pitched roof conforming scaffold
Reexamination Certificate
2000-07-24
2001-08-07
Cuomo, Peter M. (Department: 3636)
Fire escape, ladder, or scaffold
Pitched roof conforming scaffold
C248S237000, C108S042000
Reexamination Certificate
active
06269905
ABSTRACT:
FIELD OF THE INVENTION
This is a table top for supporting loads such as shingles or other materials on top of a peaked roof with the table resting at least in part on the roof peak.
DESCRIPTION OF THE PRIOR ART
The closest prior art appears in U.S. Pat. No. 5,960,904 titled “WORK TABLE FOR USE ON A PEAKED ROOF” by Ullmann. The '904 device has a rigid planar table top which rests generally along a longitudinal center line on the peak of the roof. The table top has legs which are pivotally attached to the underside of the table top and extend downward on both sides of the peak and rest on the roof top on each side of the peak. Support struts are fixedly attached at one end to the corners of the table top and extend downward from the table top and are attached to respective ones of the legs. The struts are adjustable in length presumably to account for different roof pitches. However, these adjustments do not take into account slight changes or differences in roof pitches that occur either during construction of the roof or with the age of the roof and/or the building. Another problem encountered with the '904 device is the dispersal of the forces acting on the roof supports or rafters. The load carried by the table applies a force directly downward onto the roof peak and via the struts straight downward from the table top to the legs which forces tend to spread or split apart the roof supports or rafters.
SUMMARY OF THE INVENTION
Similar to the '904 patent, the instant device has a table top or platform which is generally planar but which is formed by two sections which are hinged together along a general center line for resting on the peak or ridge of the roof. Support legs are pivotally attached and extend downward from the underside of the platform to rest against the roof on each side of the ridge. Load-bearing arms are pivotally attached at one end to the underside of the table top at a location outward from the hinge and are angled inward to attach to the support legs. A load placed on the table top or platform applies a force along the hinge downward onto the peak of the roof and also the weight of the load acting downward on the two hinged sections causes them to tilt or bend downward so that the arms which are attached to the support legs apply a force against the roof on opposite sides of the peak thereby squeezing or pinching together to support the load in a manner which is less likely to cause any damage to the supporting roof rafters. The arms are adjustably attached to the platform so they can be moved as needed to accommodate different roof pitches.
REFERENCES:
patent: 829312 (1906-08-01), Alberty
patent: 956406 (1910-04-01), Nowodworski
patent: 1189166 (1916-06-01), Neville
patent: 1222053 (1917-04-01), Watson
patent: 5193773 (1993-03-01), Middleton
patent: 5474271 (1995-12-01), Raymond
patent: 5960904 (1999-10-01), Ullmann
Anderson Jerry A.
Cuomo Peter M.
Jacobson and Johnson
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