Check valve

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view taken from the front and right side of a check valve, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a sectional view taken along line 6--6 of FIG. 4.

Referenced Cited
U.S. Patent Documents
D202701 November 1965 Davis, Jr.
D203323 December 1965 Scaramucci
D248485 July 11, 1978 Strauss et al.
3303819 February 1967 Wade
3967645 July 6, 1976 Gregory
4067414 January 10, 1978 Funke
Patent History
Patent number: D269633
Type: Grant
Filed: Sep 8, 1980
Date of Patent: Jul 5, 1983
Inventors: Allan H. Willinger (New York, NY), Tsuyoshi Itakura (Ohta-Ku, Tokyo)
Primary Examiner: Bernard Ansher
Law Firm: Goodman & Teitelbaum
Application Number: 6/185,001
Classifications
Current U.S. Class: D23/22; D23/4; D24/53
International Classification: D2301;