Title: Vibrator and pushing apparatus for driving metal pins in rock faces in mines

Abstract: Method and apparatus for driving metal pins into a rock face in an underground mine to strengthen rock surfaces such as stratified overburden, or rock ribs, against failure. A cylinder containing a pin with its head resting on a driven member, and having lateral support within the apparatus, is positioned against the rock face to be pinned. The pin is then driven into the rock by a combination of pressure and vibration at sonic frequencies applied longitudinally to the pin to thus strengthen the rock face against collapse.

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Inventors: Pennington, James R. (Basking Ridge, NJ, US)

Application Number: 347936
Filing Date: 1973-04-04
Publication_date: 1977-07-05
Assignee: Allied Chemical Corporation (Morris Township, NJ)
Primary Class(es): 173/34 173/49, 173/160, 175/19, 227/130, 405/259.1
Other Classes:
US Patent Ref:

3008528	Nov, 1961	Berthet et al.	173/49.
3431988	Mar, 1969	Bodine	175/56.
3595325	Jul, 1971	Libby et al.	175/56.
3597929	Aug, 1971	Bodine	173/52.
3721094	Mar, 1973	Elders et al.	173/34.
3819101	Jun, 1974	Elders et al.	227/130.

Other Refs:
Primary Examiner: Purser, Ernest R.
Assistant Examiner:
Attorney: Rooney; Gerard P.