Fire escape – ladder – or scaffold – Suspended platform
Reexamination Certificate
2002-09-10
2004-11-16
Thompson, II, Hugh B. (Department: 3634)
Fire escape, ladder, or scaffold
Suspended platform
C014S074000
Reexamination Certificate
active
06817444
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to bridges and, more specifically, to temporary suspended work platforms comprising a floor and walls combining with the undersurface of a suspended bridge or roadway to form enclosure defining a workspace wherein one or more persons having access to the bridge or roadway superstructure can descend for repair and maintenance of the underside of said bridge or roadway.
The temporary suspended work platform has a floor consisting of a plurality of overlapping corrugated steel sheets substantially coplanar with the roadway. The corrugated steel sheets have a support structure thereunder comprising longitudinally positioned cables extending from the abutment members and perpendicular support members whereby said interlocking cables support the corrugated steel work platform, work crew, spent steel abrasives and relevant equipment and act as a dampening element against wind sheer caused by sealing the work platform to the bridge by means of flexible sheet material.
The flexible walls are releasably fastened to the periphery of the work platform and extend substantially vertical to the roadway where it is releasably attached by fasteners to the roadway by ties to the guiderails and may additionally be anchored between said guiderails by placing weights on the material extending between the guiderails.
Additionally the containment platform can be segmented by erecting partitions which seal one segmented section from the other.
2. Description of the Prior Art
There are other work platforms device designed for suspension. Typical of these is U.S. Pat. No. 629,935 issued to Sturgis on Aug. 1, 1899.
Another patent was issued to Sutton on Jun. 2, 1936 as U.S. Pat. No. 2,043,128. Yet another U.S. Pat. No. 2,057,092 was issued to Geib on Oct. 13, 1936 and still yet another was issued on Oct. 3, 1950 to Benson as U.S. Pat. No. 2,524,302.
Another patent was issued to Goodell on Feb. 5, 1963 as U.S. Pat. No. 3,076,522. Yet another U.S. Pat. No. 3,945,462 was issued to Griswold on Mar. 23, 1976. Another was issued to Barber on Jul. 7, 1981 as U.S. Pat. No. 4,276,959 and still yet another was issued on Mar. 14, 1989 to Eyerly as U.S. Pat. No. 4,811,530.
Another patent was issued to Lyras et al. on Aug. 8, 1989 as U.S. Pat. No. 4,845,419. Yet another U.S. Pat. No. 5,011,710 was issued to Harrison on Apr. 30, 1991. Another was issued to Margaritis on Apr. 5, 1994 as U.S. Pat. No. 5,299,655 and still yet another was issued on Oct. 21, 1997 to Uzawa as U.S. Pat. No. 5,678,654.
Another patent was issued to Apostolopoulos on Mar. 24, 1998 as U.S. Pat. No. 5,730,248. Yet another U.S. Pat. No. 5,911,288 was issued to Zafirakis on Jun. 15, 1999. Another was issued to Apostolopoulos on Jul. 13, 1999 as U.S. Pat. No. 5,921,346 and still yet another was issued on Dec. 21, 1999 to Apostolopoulos as U.S. Pat. No. 6,003,634.
Another patent was issued to Apostolopoulos on Oct. 24, 2000 as U.S. Pat. No. 6,135,240. Yet another U.S. Pat. No. 6,138,793 was issued to Apostolopoulos on Oct. 31, 2000. Another was issued to Apostolopoulos on May 8, 2001 as U.S. Pat. No. 6,227,331. Another was issued on Jul. 24, 2001 to Apostolopoulos as U.S. Pat. No. 6,242,002 and still yet another was issued on Oct. 16, 2001 to Apostolopoulos as U.S. Pat. No. 6,302,237.
U.S. Pat. No. 629,935
Inventor: Nelson H. Sturgis
Issued: Aug. 1, 1899
The invention in a suspension bridge is the combination with columns, and anchored main cables, of hanger rods fast with the main cables and carrying the needle-beams, anchored joist cables laid on the needle-beams, side cables joined to the hanger-rods and fitted below the ends of the needle-beams, horizontal truss cables fitted around the ends of the needle-beams, and a floor laid on the joist-cables, substantially as described.
U.S. Pat. No. 2,043,128
Inventor: Cyril D. Sutton
Issued: Jun. 2, 1936
The invention is a scaffold including a platform having a permanent deck formed with a substantially centrally located opening which is adapted to accommodate a vertical structural member when the scaffold is arranged in position and being formed with a passage which leads from the margin of said platform to said opening, whereby said platform may be moved laterally to position said member in said opening, a floor section carried by said platform which is movable to cover the greater part of said passage when said member occupies said opening, an auxiliary floor section which is movable to cover the remainder of said passage, said auxiliary section being available to increase the size of said opening when necessitated by the use of the platform in connection with a larger structural member and means for supporting said platform at a determined height with respect to said first mentioned member.
U.S. Pat. No. 2,057,092
Inventor: Robert Lewis Geib
Issued: Oct. 13, 1936
The invention discloses means for supporting one platform at right angles to another platform comprising a bracket, said bracket comprising a pair of parallel T shaped flanges connected by a tierod, one side of the vertical portions of said T comprising means for supporting a platform, the horizontal branches of said T which extend on the other side of the vertical portions thereof comprising means for supporting said bracket by the side of the supporting platform.
U.S. Pat. No. 2,525,302
Inventor: Jesse Mack Benson
Issued: Oct. 3, 1950
The invention is a scaffold supporting bracket comprising a pair of elongated oppositely disposed parallel extending angle members on which planks may be supported, means securing said angle members together in spaced apart relation longitudinally thereof, a first supporting rod having a loop formed on one end loosely extending between said angle members at one end of the latter, pivot means carried by said angle members extending through said loop for rockably connecting said rod to said angle members, a second supporting rod having a loop formed on one end extending loosely between said angle members at the other end thereof, pivot means extending through the loop of said second supporting rod for rockably connecting said second rod to said angle members, and bent tabs formed on the opposite ends of said angle members closing the space between the latter and engageable with the adjacent ones of said supporting rods for limiting the rocking of said rods away from said angle members.
U.S. Pat. No. 3,076,522
Inventor: Harvey L. Goodell
Issued: Feb. 5, 1963
The invention discloses a scaffold apparatus for use on an elevated roadway comprising an elongated upstanding mobile frame adapted to straddle and rest upon an elevated roadway, a vertically disposed support member mounted on one end of said mobile frame and having a portion extending below said mobile frame, the lower end of said mobile frame extending vertically beneath the roadway, and a horizontally disposed walkway mounted on said support member for swinging movement in clockwise and counterclockwise directions of said walkway about said support member as a vertical axis into and out of position below and in longitudinal alignment with said frame, said walkway, when said mobile frame straddles and rests upon an elevated roadway, being of a length to extend beneath said roadway and adapted to support workmen thereon for the purpose of treating the underside of said roadway.
U.S. Pat. No. 3,945,462
Inventor: James D. Griswold
Issued: Mar. 23, 1976
Hanger brackets for suspending working scaffold or platform floors from overhead supports. Paired legs adjustably and pivotally joined together in scissors arrangement have finger ends for engaging overhead beams or elements thereof as depending portions of the legs that extend beneath the center pivot are moved inwardly. A spreader bar having a plurality of position adjustment openings is engaged between the depending legs to lock the fingers and bracket in place. The lower leg ends also provide a plurality of adjustment openings so the spreader bar may be engaged at alternate elevations for accommodating various st
Kroll Michael I.
Thompson II Hugh B.
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