Boring and compacting tool

Details Boring and compacting tool Boring and compacting tool

1977-11-21

1979-01-23

Purser, Ernest R.

Boring or penetrating the earth

Boring without earth removal

175 62, 175385, 175394, E21B 1102

Patent

active

041355881

ABSTRACT:
The boring and compacting tool comprising an elongated shaft having a front conical section and a rear cylindrical portion. A front helical spring is wrapped about the conical section and attached thereto at the ends thereof. A cutting head is threaded onto a front end of the conical portion. A distinct annular cylindrical collar fits about the cylindrical section of the shaft and is removably secured thereto. A rear helical spring is fitted about the conical portion of the shaft behind the collar and is threaded about the shaft in the same direction as the front helical spring.

REFERENCES:
patent: 1547459 (1925-07-01), Stafford et al.
patent: 1616666 (1927-02-01), Nebergall
patent: 2349033 (1944-05-01), Elliott
patent: 2425132 (1947-08-01), Stokes
patent: 2558341 (1951-06-01), Cory et al.
patent: 2565333 (1951-08-01), Weidman et al.
patent: 2673714 (1954-03-01), Hargrave
patent: 2973821 (1961-03-01), Stihl
patent: 2979141 (1961-04-01), Kandle
patent: 3554303 (1971-01-01), Zajkowski
patent: 3708023 (1973-01-01), Nazarov et al.

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