Pneumatic ground piercing tool

Details Pneumatic ground piercing tool Pneumatic ground piercing tool

1989-11-13

1991-06-25

Eley, Timothy V.

Tool driving or impacting

Impacting devices

Selective axial direction of impact

173137, 175 19, B25D 900

Patent

active

050258680

ABSTRACT:
The present invention provides a self-propelled impact boring tool which, according to one aspect of the invention, has a simplified tail assembly so that the tool can be readily assembled and dissambled to allow replacement of worn parts. Such a tail assembly includes a nut and an end cap which can be secured together by a series of conventional bolts which extend into threaded holes in the nut. The nut, which is screwed into the rear end of the tool body, can be clamped in position with the screws with far less torque than would otherwise be required with a conventional, unitary tailpiece.

REFERENCES:
patent: 3410354 (1968-11-01), Sudnishnikov et al.
patent: 3756328 (1968-11-01), Sudnishnikov et al.
patent: 4078619 (1978-03-01), Sudnishnikov et al.
patent: 4221157 (1980-09-01), Schmidt
patent: 4609052 (1986-09-01), Lewin
patent: 4662457 (1987-05-01), Bouplon

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