Double-seated control valve plug

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Description

FIG. 1 is a front elevation view of the double seated control valve plug, the back elevation view being identical;

FIG. 2 is a top plan view of the double seated control valve plug;

FIG. 3 is a bottom plan view of the double seated control valve plug;

FIG. 4 is an isometric bottom view of the double seated control valve plug; and,

FIG. 5 is an isometric top view of the double seated control valve plugs.

Referenced Cited
U.S. Patent Documents
D56554 November 1920 Devaney
D235342 June 1975 Otto
D306200 February 20, 1990 Bednar
D351898 October 25, 1994 Stowers, Jr.
D403049 December 22, 1998 Ohtani et al.
3827439 August 1974 Schulte et al.
5439024 August 8, 1995 Zimmerly
5738459 April 14, 1998 Smith
Patent History
Patent number: D421791
Type: Grant
Filed: Jul 10, 1997
Date of Patent: Mar 21, 2000
Assignee: Yamatake-Honeywell Co., Ltd. (Tokyo)
Inventors: Hideo Ohtani (Kanagawa-Pref), Ryoji Okutsu (Kanagawa-Pref), Ryuji Shinozaki (Tokyo)
Primary Examiner: Eric Watterson
Law Firm: Whitham, Curtis & Whitham
Application Number: 0/73,457
Classifications
Current U.S. Class: Cap, Plug, Vent Or Screen (11) (D23/260)
International Classification: 2301;