Miniature butterfly impact wrench

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Description

FIG. 1 is a left side elevational view of a miniature butterfly impact wrench showing my new design, the right side elevational view being a mirror image thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a front elevational view thereof.

Referenced Cited
U.S. Patent Documents
3054312 September 1962 Zengerer
3366187 January 1968 Tersch
4191264 March 4, 1980 Antipov et al.
4313505 February 2, 1982 Silvern
4811797 March 14, 1989 Antipov et al.
4846287 July 11, 1989 Ericsson
Other references
  • Snap-On Tool Catalog, dated Nov. 1, 1991, p. 188 Drive Impact Wrenche #IM 32.
Patent History
Patent number: D349027
Type: Grant
Filed: Apr 30, 1993
Date of Patent: Jul 26, 1994
Assignee: Shinano Pneumatic Industries, Inc. (Kamiminochi)
Inventor: Osamu Izumisawa (Tokyo)
Primary Examiner: Alan P. Douglas
Assistant Examiner: J. H. Musgrove
Law Firm: Senniger, Powers, Leavitt & Roedel
Application Number: 0/7,866
Classifications
Current U.S. Class: D 8/61