Drill for percussion drilling machines

Details Drill for percussion drilling machines Drill for percussion drilling machines

1974-03-28

1977-10-04

Purser, Ernest R.

Tool driving or impacting

Impacting devices

With means for rotating tool

64 27NM, 173132, 279 193, E21C 1502

Patent

active

040519058

ABSTRACT:
A drill for use especially with percussion drilling machines and rotary drill hammers for working rock and concrete is disclosed. The drill includes an elongated shank having a leading and trailing end, the latter of which is adapted to receive axial blows from the drilling machine. A unitary plastic receiving part at least partly encloses and mechanically interlocks with the shank periphery adjacent the trailing end of the shank. The exterior of the plastic receiving art is threaded for engagement with interior threads of a drilling machineadapter.

REFERENCES:
patent: 1393072 (1921-10-01), Bayles
patent: 2041704 (1936-05-01), Gordon et al.
patent: 2043442 (1936-06-01), McNeil
patent: 2268577 (1942-01-01), Drewett
patent: 2278707 (1942-04-01), Luttgens
patent: 2606366 (1952-08-01), Stevens
patent: 2685274 (1954-08-01), Liddicoat
patent: 2951706 (1960-09-01), Dean
patent: 2997024 (1961-08-01), McLean
patent: 3372763 (1968-03-01), Fischer
patent: 3751176 (1973-08-01), Von Hollen
patent: 3842942 (1974-10-01), Jensen et al.

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