Post with integral hammer and anvil

Details Post with integral hammer and anvil Post with integral hammer and anvil

2005-02-15

2005-02-15

Smith, Scott A. (Department: 3721)

Tool driving or impacting

Impacting devices

C173S091000, C173S132000

Reexamination Certificate

active

06854531

ABSTRACT:
A post includes an elongate ground piercing member having a ground piercing end and an anvil end at which is positioned an anvil. The anvil is positioned within an interior cavity of a housing with the ground piercing member extending through a second end of the housing. Relative movement of the ground piercing member and the housing brings a first hammer into contact with the anvil to drive the ground piercing member into the ground. Relative movement of the ground piercing member and the housing brings a second hammer into contact with the anvil to remove the ground piercing member from the ground. A lock is provided to selectively limit relative movement of the ground piercing member and the housing to prevent the second hammer from contacting the second striking face of the anvil.

REFERENCES:
patent: 1605435 (1926-11-01), Hansen
patent: 2713327 (1955-07-01), Binkley
patent: 2790419 (1957-04-01), Sullivan
patent: 2902976 (1959-09-01), Wilson
patent: 3100476 (1963-08-01), Peak
patent: 3143817 (1964-08-01), Paulson
patent: 3159234 (1964-12-01), Junk
patent: 4186690 (1980-02-01), Seiler
patent: 4279104 (1981-07-01), Classen
patent: 4662305 (1987-05-01), Cline
patent: 4802443 (1989-02-01), Denmark
patent: 4939877 (1990-07-01), Claffey
patent: 5031577 (1991-07-01), Flugger
patent: 5375801 (1994-12-01), Porter
patent: 5456214 (1995-10-01), Quilling
patent: 5833215 (1998-11-01), Vandenburg
patent: 5875951 (1999-03-01), Ingle et al.
patent: 6142103 (2000-11-01), Meyers et al.

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