Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – Conduit snakes
Reexamination Certificate
2007-02-12
2009-02-17
Singh, Sunil (Department: 3672)
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
Conduit snakes
Reexamination Certificate
active
07490814
ABSTRACT:
A cable pulling machine of the invention includes a frame, a mechanical linkage including first and second links having first and second cable gripping shoes disposed thereon respectively in opposed positions, a latching cylinder actuable to cause the mechanical linkage to pivot on multiple axes to bring the shoes into engagement with a cable disposed therebetween, a main cylinder having one end mounted on the frame and actuable to move the linkage in a manner effective to pull the cable in a pulling stroke once the latching cylinder has brought the shoes into engagement with the cable, and suitable means for extending and retracting the main and latching cylinders. The machine may also include suitable means for holding the cable in tension between pulling strokes, such as a pivoting wedge mechanism as described hereafter.
REFERENCES:
patent: RE35542 (1997-06-01), Fisk et al.
patent: 6305880 (2001-10-01), Carter et al.
patent: 6830234 (2004-12-01), Tjader
patent: WO 98/30350 (1998-07-01), None
“Lateral Bursting—Grundotugger,” TT Technologies website, www.tttechnologies.com, 4 pages, undated.
“Xpandit—Trenchless Pipe Replacement” brochure, Miller Pipeline Corporation, 1994, 8 pages.
“Ton Hydraulic Simm-Pul,” Assembly and Operating Instructions, Bert Systems Ltd, 7 pages, undated.
“I-150 Linear Winch,” AmClyde Engineered Products, Inc., 1 page, undated.
Earth Tool Company L.L.C.
Meyers Philip G.
Singh Sunil
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