Hydraulic and earth engineering – Earth treatment or control – Ground stabilization or reinforcement
Reexamination Certificate
2006-12-05
2006-12-05
Lagman, Frederick L. (Department: 3673)
Hydraulic and earth engineering
Earth treatment or control
Ground stabilization or reinforcement
C405S116000, C405S183000, C405S302700, C037S366000, C037S367000, C037S404000, C172S720000
Reexamination Certificate
active
07144202
ABSTRACT:
A machine to install the lower edge of silt fence fabric in a seam in the soil includes a frame with a plow member attached. The frame can be mounted to the three point hitch of a tractor so that the machine can be raised, lowered, and tilted while being supported by the tractor. Silt fence fabric from a roll carried on a rod on the machine is fed into a chute formed by two parallel plates of the plow member. The fabric is drawn out the front of the plow member and drawn along the side of the plow member by friction with the soil through which the plow member is drawn.
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Photos of silt fence machine sold by Gary Harms d/b/aUniversal Welding of Wellsburg, IA at least as early as Aug. 1, 2002, (5 prints in color).
Aaron Burchland, photographer, photo of machine attributed to Universal Welding, undated.
Unknown Photographer, seven photos of machine attributed to Schmidt, undated.
Declaration of Christopher D. McCormick with attached Exhibits A-H, dated Jul. 24, 2006.
Harms Allan L.
Lagman Frederick L.
Wenzel & Harms P.C.
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