Earth auger and method for driving piles and the like by means o

Details Earth auger and method for driving piles and the like by means o Earth auger and method for driving piles and the like by means o

1974-04-29

1976-02-17

Shapiro, Jacob

Boring or penetrating the earth

Below-ground impact members

With releasable means to detachably retain telescoping...

61 41A, 61 536, 52155, 52160, 175171, E02D 534, E02D 574

Patent

active

039383440

ABSTRACT:
An earth auger is disclosed in which an auger shaft is provided with freely expansible and contractible rotary blades in such manner that said rotary blades may expand automatically when said auger shaft is rotated in the forward direction and may contract automatically when said auger shaft is rotated in the reverse direction. Also a method for driving piles and the like is disclosed which comprises the steps of positioning a pile or shoring adjacent to said auger shaft and above said blades, advancing said pile or the like into an earth bore excavated by said rotary blades, and filling said bore excavated by the rotary blades with mortar or the like.

REFERENCES:
patent: 2912228 (1959-11-01), Kandle
patent: 3420320 (1969-01-01), Washita
patent: 3422629 (1969-01-01), Watts
patent: 3499293 (1970-03-01), Kato
patent: 3530675 (1970-09-01), Turzillo
patent: 3742717 (1973-07-01), Wey
patent: 3864923 (1975-02-01), Turzillo

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