Tapered threaded coupling

- WFI International, Inc.
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Description

FIG. 1 is a front perspective view of the tapered threaded coupling showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a rear plan view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a side view thereof, with the opposite side view being identical thereto.

Referenced Cited
U.S. Patent Documents
D243456 February 22, 1977 Ryan
D243457 February 22, 1977 Ryan
D254266 February 19, 1980 Taberiou
D262397 December 22, 1981 Ryan
D267505 January 4, 1983 Ryan
D274549 July 3, 1984 Ryan
D282867 March 4, 1986 Ryan et al.
D282961 March 11, 1986 Byan
D293710 January 12, 1988 Woods
625155 May 1899 Dresser
1901201 March 1933 Taylor
2109915 March 1938 Watts
2328298 August 1943 Santhoff
2355871 August 1944 Kraft
2701149 February 1955 Kreidel et al.
3254909 June 1966 Ver Nooy
3667783 June 1972 Sotolongo
4438955 March 27, 1984 Ryan
4450613 May 29, 1984 Ryan et al.
Foreign Patent Documents
1188438 October 1985 SUX
510509 August 1939 GBX
Other references
  • European Products "Promat Weldoflange," Promat Nipoflange, and Promat Reinforced Nipoflange, pp. 35-30 (date not provided). WFI Spec. Sheet Therma-Connections, p. 34, Sep., 1980. WFI International, Inc., Forged Piping and Vessel Components Catalog, 1987.
Patent History
Patent number: D383378
Type: Grant
Filed: Feb 9, 1994
Date of Patent: Sep 9, 1997
Assignee: WFI International, Inc. (Houston, TX)
Inventors: Robert S. Schrader (Dallas, TX), James L. Snyder (Houston, TX), James Phillip Ellenberger (Spring, TX), James W. Magee (Houston, TX), Peter J. Badley (Houston, TX), Joe A. Escobedo (Houston, TX), Daniel T. Gutierrez (Houston, TX), Williams E. Goussen (Houston, TX)
Primary Examiner: Lucy Lieberman
Law Firm: Pravel, Hewitt, Kimball & Krieger
Application Number: 0/18,529
Classifications
Current U.S. Class: D/8382; Coupling Or Joint (D23/262)
International Classification: 0808;