Two way check respiratory valve

- Hans Rudolph, Inc.
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Description

FIG. 1 is a perspective view of a two way check respiratory valve showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof, the opposite side being a mirror image; and

FIG. 5 is a top plan view thereof, the bottom plan view being a mirror image.

Referenced Cited
U.S. Patent Documents
D276464 November 20, 1984 Weigl et al.
D276465 November 20, 1984 Clawson et al.
D300270 March 14, 1989 Rudolph et al.
D300271 March 14, 1989 Rudloph et al.
D300272 March 14, 1989 Rudolph et al.
D300273 March 14, 1989 Rudolph et al.
D300274 March 14, 1989 Rudolph et al.
3643686 February 1972 Koegel
4436090 March 13, 1984 Darling
4489721 December 25, 1984 Ozaki et al.
4493339 January 15, 1985 Porter, Jr.
Patent History
Patent number: D305165
Type: Grant
Filed: Aug 6, 1987
Date of Patent: Dec 19, 1989
Assignee: Hans Rudolph, Inc. (Kansas City, MO)
Inventors: Hans Rudolph (Shawnee Mission, KS), Kevin Rudolph (Leawood, KS)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Stella M. Reid
Law Firm: Litman, McMahon & Brown
Application Number: 7/82,186
Classifications
Current U.S. Class: D29/7