Shock resistant digging iron

Details Shock resistant digging iron Shock resistant digging iron

1982-05-17

1984-12-25

Leppink, James A.

Boring or penetrating the earth

With tool shaft detail

294 57, 16116R, 174138R, B25G 112

Patent

active

044897952

ABSTRACT:
An improved digging iron for probing for buried high tension lines has for safety an insulative, non-wettable shaft of glaze-finish fibreglass which may additionally have a silicone rubber dielectric coating on it. The shaft has shouldered ends fitting sockets of the chisel shaped digging end and of a circular-section top section with the shoulders abutting the sockets and the ends bottoming in the sockets for support; the top section acts to reinforce the shaft for driving or as an integral hammer mass and serves as a balance for the digging end.

REFERENCES:
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patent: 436157 (1890-09-01), Slocom
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patent: 1248445 (1917-12-01), Braine
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patent: 2457258 (1948-12-01), Mitchell
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patent: 2997529 (1961-08-01), Fink
patent: 3328223 (1967-06-01), Fink
patent: 3619009 (1971-11-01), O'Leary
patent: 3688017 (1972-08-01), Roots
patent: 3712659 (1973-01-01), Kneissl
patent: 3915782 (1975-10-01), Davis et al.

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