Title: Bit coupling means

Abstract: A rock hammer and more particularly a rock hammer having thereon improved means for securing a cutting or breaking bit assembly thereto.

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Inventors: Bailey, Edward A. (Newport, NH, US)
Pertusio, Rene (Goshen, NH, US)
Hibbard, George A. (Claremont, NH, US)

Application Number: 474895
Filing Date: 1974-05-31
Publication_date: 1976-03-09
Assignee: Joy Manufacturing Company (Pittsburgh, PA)
Primary Class(es): 299/113 403/320, 403/343
Other Classes:
US Patent Ref:

2049289	Jul, 1936	Burns et al.	403/320.
2318590	May, 1943	Boynton	403/320.
2672358	Mar, 1954	Wienola	403/320.
3258284	Jun, 1966	Phipps	403/343.
3544166	Dec, 1970	Proctor	299/91.
3709306	Jan, 1973	Curington	173/80.
3806265	Apr, 1974	Hattan	403/320.

Other Refs:
Primary Examiner: Abbott, Frank L.
Assistant Examiner:
Attorney: