Shank adaptor for a rock drill

- Oy Tampella AB
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Description

FIG. 1 is a reduced perspective view of a shank adaptor for a rock drill showing our new design;

FIG. 2 is a top end elevational view thereof;

FIG. 3 is a bottom end elevational view thereof;

FIG. 4 is a side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D234624 March 1975 Adolfssen
D260355 August 25, 1981 Buzsell
D266521 October 12, 1982 Gustafsson
D276879 December 25, 1984 Bell
2740974 April 1956 Lewis
2904313 September 1959 Wisenbaker
4491443 January 1, 1985 De Caro
Foreign Patent Documents
0901767 July 1962 GBX
Patent History
Patent number: D282666
Type: Grant
Filed: Mar 11, 1983
Date of Patent: Feb 18, 1986
Assignee: Oy Tampella AB (Tampere)
Inventors: Pekka Salmi (Tampere), Hannu Paasonen (Nokia)
Primary Examiner: B. J. Bullock
Assistant Examiner: Suzanne N. Gitlin
Law Firm: Ladas & Parry
Application Number: 6/474,265