Open seam friction rock stabilizer

- Ingersoll-Rand Company
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Description

FIG. 1 is a front elevational view of a open seam friction rock stabilizer showing my design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is back elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top front perspective view thereof.

Referenced Cited
U.S. Patent Documents
RE30256 April 8, 1980 Scott
3922867 December 1975 Scott
4012913 March 22, 1977 Scott
4126004 November 21, 1978 Lindeboom
4310266 January 12, 1982 Malsbury et al.
4313695 February 2, 1982 McCartney
4316677 February 23, 1982 Ciavatta
4322183 March 30, 1982 Ciavatta
4400113 August 23, 1983 Chaiko et al.
4490074 December 25, 1984 Chaiko
Foreign Patent Documents
514153 October 1979 AUX
Patent History
Patent number: D349120
Type: Grant
Filed: Nov 27, 1991
Date of Patent: Jul 26, 1994
Assignee: Ingersoll-Rand Company (Woodcliff Lake, NJ)
Inventor: Thomas J. Landsberg (Princeton, NJ)
Primary Examiner: Bernard Ansher
Assistant Examiner: M Siegel
Attorney: John J. Selko
Application Number: 7/798,771