Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Lifter
Reexamination Certificate
2005-03-08
2005-03-08
Watson, Robert C. (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Lifter
Reexamination Certificate
active
06863262
ABSTRACT:
A pole bridle (20) for facilitating the manipulation of a pole (22) by a hoist includes plates (24) configured for placement in spaced-relation about the pole (22). Retaining members (26) are coupled to an outer surface (28) of the plates (24). The retaining members (26) are configured to retain a flexible member (62) of the hoist in encircling-relation about the pole (22). An upward force (72) imposed on the flexible member (62) creates a transverse force (74) on the plates (24) to direct the plates (24) against the pole (22). The transverse force (74) largely prevents the plates (24) from slipping along the pole (22) as the upward force (72) incrementally extracts the pole (22) from a fixed, upright position in the ground (60).
REFERENCES:
patent: 261629 (1882-07-01), Raymond
patent: 3165348 (1965-01-01), Keskitalo
patent: 3704503 (1972-12-01), Haywood
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patent: 4721335 (1988-01-01), Krenek, Jr.
patent: 4822006 (1989-04-01), McIntire
patent: 6382594 (2002-05-01), Ransom
Fairmont Catalog, p. 33—Pole Puller.
Theirmann Industries, Inc.—Theirmann Industries Tiiger Pole Puller, Web Page. www.tiiger.com/polepullart.html, Mar. 26, 2003.
Koch “Latest Tools and Techniques Optimize Field Work” Electrical World T&D, Sept/Oct 2000, http://www.platts.com/engineering/issues/ElectricalWorld/0009/0009ew-tools.shtml.
Booker Brian A.
Brittain Carl C.
Mitchell John D.
Gresham Lowell W.
Meschkow Jordan M.
Meschkow & Gresham P.L.C.
Pinnacle West Capital Corporation
Watson Robert C.
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