Wedge for a drill shank of a percussion drilling machine

- OY Tampella AB
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Description

FIG. 1 is a perspective side and end view of a wedge for a drill shank of a percussion drilling machine showing our new design;

FIG. 2 is a perspective top and end view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is an end view thereof.

Referenced Cited
U.S. Patent Documents
D250874 January 23, 1979 D'Haem
D282666 February 18, 1986 Salmi et al.
3517754 June 1970 Hughes
4629375 December 16, 1986 Lieser
Foreign Patent Documents
2306322 August 1974 DEX
2613309 September 1977 DEX
0018916 1896 GBX
Patent History
Patent number: D291087
Type: Grant
Filed: Dec 18, 1984
Date of Patent: Jul 28, 1987
Assignee: OY Tampella AB (Tampere)
Inventors: Pekka Salmi (Tampere), Timo Muuttonen (Nokia)
Primary Examiner: B. J. Bullock
Law Firm: Ladas & Parry
Application Number: 6/683,259