Guard for derrick apparatus

- Varco I/P, Inc.
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Description

FIG. 1 is a perspective view of a design for a guard for derrick apparatus according to the present invention.

FIG. 2 is a first side perspective view of the guard of FIG. 1.

FIG. 3 is a second side perspective view of the guard of FIG. 1, opposite to the first side.

FIG. 4 is a first side view of the guard of FIG. 1.

FIG. 5 is a second side view of the guard of FIG. 1, opposite the first side shown in FIG. 4.

FIG. 6 is a top view of the guard of FIG. 1; and,

FIG. 7 is a bottom view of the guard of FIG. 1.

Claims

The ornamental design for a guard for derrick apparatus, as shown and described.

Referenced Cited
U.S. Patent Documents
4030364 June 21, 1977 Atwood
4080846 March 28, 1978 Calhoun
4449596 May 22, 1984 Boyadjieff
4529045 July 16, 1985 Boyadjieff et al.
4605077 August 12, 1986 Boyadjieff
4813493 March 21, 1989 Shaw et al.
4872517 October 10, 1989 Shaw et al.
5107940 April 28, 1992 Berry
5433279 July 18, 1995 Tessari et al.
6276450 August 21, 2001 Seneviratne
6536520 March 25, 2003 Snider et al.
6679333 January 20, 2004 York et al.
6688398 February 10, 2004 Pietras
6705405 March 16, 2004 Pietras
6725938 April 27, 2004 Pietras
20040221994 November 11, 2004 Kauffman et al.
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20050269104 December 8, 2005 Folk et al.
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Other references
  • Varco General Catalog 2002; Varco L.P.: cover page; pp. 44, 45, 56, 65; 2002.
  • BJ 1986-87 Oil Field Products and Systems; BJ Hughes Drilling Equipment; cover page, pp. 7, 16; 1986.
  • Advanced Permanent Magnet Motor Technology; Tesco Drilling Technolgy: 2 pp.; Apr. 1998.
  • Powerful Hydraulic Compact Top Drive Drilling System; Tesco Drilling Technology; 2 pp.; Apr. 1998.
Patent History
Patent number: D533196
Type: Grant
Filed: May 28, 2005
Date of Patent: Dec 5, 2006
Assignee: Varco I/P, Inc. (Houston, TX)
Inventors: Robert Alden Folk (Calgary), Steven Lorne Folk (Sherwood Park)
Primary Examiner: Mitchell Siegel
Assistant Examiner: Mark Goodwin
Attorney: Guy McClung
Application Number: 29/230,984