Gate valve

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

FIG. 1 is a perspective view taken from the top, front and left side of a gate valve showing my new design;

FIG. 2 is a perspective view taken from the top, rear and right side thereof;

FIG. 3 is a bottom plan view thereof; and

FIG. 4 is a left side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D179791 February 1957 Williams
D204655 May 1966 Lowrey et al.
D238947 February 1976 Chilek et al.
3063079 November 1962 Bergman et al.
3215157 November 1965 Anderson et al.
3533598 October 1970 Tillman III
3557822 January 1971 Chronister
3889925 June 1975 Brooks
3929316 December 1975 Guthrie
4043535 August 23, 1977 Freeman et al.
4222406 September 16, 1980 Schaefer
4340204 July 20, 1982 Herd
Other references
  • Oil Field Composite Catalog 1980/1980, pp. 7335, 7367-7369 (WKM Catalog 80).
Patent History
Patent number: D292933
Type: Grant
Filed: Sep 2, 1983
Date of Patent: Nov 24, 1987
Inventor: Willard E. Kemp (Houston, TX)
Primary Examiner: James R. Largen
Law Firm: Vaden, Eickenroht, Thompson & Boulware
Application Number: 6/529,152
Classifications
Current U.S. Class: Gate Or Butterfly Type (D23/244)