Drill for concrete

- Wakai & Co., Ltd.
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Description

FIG. 1 is a plan view of a drill for concrete in accordance with the present design;

FIG. 2 is a perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is an enlarged sectional view taken along line 5--5 of FIG. 3;

FIG. 6 is an enlarged sectional view taken along the line 6--6 of FIG. 3; and,

FIG. 7 is a bottom view thereof.

A rear view is omitted because it is identical to the front view. A left side view is omitted because it is identical to the right side view.

Referenced Cited
U.S. Patent Documents
D390239 February 3, 1998 Mulin
3478639 November 1969 Gruca
5074728 December 24, 1991 Hsu
5413444 May 9, 1995 Thomas et al.
Patent History
Patent number: D415774
Type: Grant
Filed: Aug 22, 1997
Date of Patent: Oct 26, 1999
Assignee: Wakai & Co., Ltd. (Osaka)
Inventor: Takao Wakai (Osaka)
Primary Examiner: Antoine Duval Davis
Law Firm: Wenderoth, Lind & Ponack, L.L.P.
Application Number: 0/91,496
Classifications
Current U.S. Class: Cutting Tool, E.g., Drill Bit, Etc. (D15/139)
International Classification: 1509;