Title: Self-propelled percussive machine for boring holes

Abstract: A percussive machine having an impact mechanism accommodated to a housing with a hammer piston imparting blows to a rock-destroying member. There is provided an air-supply duct for supplying compressed air to the impact mechanism and to the hole face. In order to prevent the machine from moving away from the hole face during the operation, the housing is provided with an elastic tubular member having a space in constant communication with the air supply duct.

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Inventors: Sudnishnikov, Boris Vasilievich
Kamensky, Veniamin Viktorovich (ULIT, SA)
Varnello, Eduard Petrovich (ULIT, SA)
Tupitsyn, Sergei Konstantinovich (ULIT, SA)

Application Number: 523798
Filing Date: 1974-11-14
Publication_date: 1976-03-09
Assignee:
Primary Class(es): 175/99 173/72, 175/230
Other Classes:
US Patent Ref:

2819038	Jan, 1958	Eckel	175/99.
3326305	Jun, 1967	Garrett et al.	175/230.

Other Refs:
Primary Examiner: Purser, Ernest R.
Assistant Examiner:
Attorney: Haseltine, Lake & Waters