Shut-off valve for specialty gases

Description

FIG. 1 is a perspective view of a shut-off valve for specialty gases showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a rear elevational view thereof; and

FIG. 7 is a front elevational view thereof.

Referenced Cited
U.S. Patent Documents
D287043 December 2, 1986 Hughes
D287044 December 2, 1986 Hughes
2468674 April 1949 Leonard
3750704 August 1973 Burke et al.
3771765 November 1973 Scapes
3774604 November 1973 Danielsson
Patent History
Patent number: D304070
Type: Grant
Filed: Mar 17, 1986
Date of Patent: Oct 17, 1989
Inventor: Richard E. Hughes (Hermosa Beach, CA)
Primary Examiner: James R. Largen
Law Firm: Cislo & Thomas
Application Number: 6/844,766