Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Reexamination Certificate
2006-09-05
2006-09-05
Lagman, Frederick L. (Department: 3673)
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
C405S272000
Reexamination Certificate
active
07101119
ABSTRACT:
An inventive apparatus and method provides for restricting movement from a collapsed or folded position of a pair of rails employed by a shoring assembly. The shoring assembly has a plurality of first pads each pivotally connected to one of the rails, a plurality of second pads each pivotally connected to the other of the rails, and a plurality of hydraulic jacks each being operatively connected between an opposing pair of the first and second pads. The pivoting movement of the plurality of first pads is restricted relative to the one rail when the rails are disposed in the collapsed position. In a particular embodiment, a pair of first pads and a pair of second pads—respectively known as cylinder pads and socket pads—are employed by the shoring assembly. Accordingly, a pair of hydraulic jacks are further employed in this embodiment of the shoring assembly.
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Efficiency Production Incorporated, “Hydraulic Shoring”; brochure 12 pages; www.epi-shields.com.
Speed Shore Pioneering Trench Safety; “Vertical Shores”; brochure 4 pages; www.epi.sheilds.com.
Cerda Industries “Trench Shields Tough Durable Innovative Versatile” brochure 8 pages.
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Lagman Frederick L.
Streets Jeffrey L.
Streets & Steele
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