Boring or penetrating the earth – Boring without earth removal
Patent
1989-12-26
1991-07-09
Dang, Hoang C.
Boring or penetrating the earth
Boring without earth removal
173 90, 173126, 175135, E21B 102
Patent
active
050296515
ABSTRACT:
A post driver for driving a wedged anchor into the ground wherein said wedged anchor is adapted to receive a post at the top end thereof comprising: an elongated inner shaft having a rectangular cross-section, said inner shaft having one end of which is adapted to be received by said wedged anchor; a plate co-extensive with said rectangular cross-section and fixedly secured at said one end of said elongated inner shaft; a hollow elongated outer shaft having spaced first and second open ends; said first open end of the hollow elongated outer shaft adapted to receive another end of the inner shaft for relative slidable movement therebetween; a mass presented at the second open end; aligned apertures presented by the mass and the outer shaft for receiving one end of a handle to retain the mass and the outer shaft together.
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patent: 4252472 (1981-02-01), Moraly
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