Friction rock stabilizer

Description

FIG. 1 is a perspective view of a friction rock stabilizer showing my design;

FIG. 2 is a right side elevational view of the design of FIG. 3;

FIG. 3 is back elevational view of the design of FIG. 1;

FIG. 4 is a left side elevational view of the design of FIG. 3;

FIG. 5 is a front elevational view of the design of FIG. 1;

FIG. 6 is a top plan view of FIG. 3; and,

FIG. 7 is a bottom plan view of FIG. 3.

Referenced Cited
U.S. Patent Documents
4069677 January 24, 1978 Yamada et al.
4316677 February 23, 1982 Ciavatta
4322183 March 30, 1982 Ciavatta
4650373 March 17, 1987 Seegmiller
4661022 April 28, 1987 Seegmiller
4666345 May 19, 1987 Seegmiller
4954017 September 4, 1990 Davis et al.
Foreign Patent Documents
514153 December 1980 ATX
Patent History
Patent number: D340176
Type: Grant
Filed: Dec 9, 1991
Date of Patent: Oct 12, 1993
Inventor: Thomas J. Landsberg (Princeton, NJ)
Primary Examiner: Alan P. Douglas
Assistant Examiner: J. H. Musgrove
Attorney: John J. Selko
Application Number: 7/805,709
Classifications
Current U.S. Class: D 8/70