|Publication number||USD532798 S1|
|Application number||US 29/230,985|
|Publication date||Nov 28, 2006|
|Filing date||May 28, 2005|
|Priority date||Jun 7, 2004|
|Also published as||USD519136, USD523210, USD533196|
|Publication number||230985, 29230985, US D532798 S1, US D532798S1, US-S1-D532798, USD532798 S1, USD532798S1|
|Inventors||Robert Alden Folk, Steven Lorne Folk|
|Original Assignee||Varco I/P, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Non-Patent Citations (4), Classifications (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
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.
|1||Advanced Permanent Magnet Motor Technology; Tesco Drilling Technology; 2 pp.; Apr. 1998.|
|2||BJ 1986-87 Oil field Products and Systems; BJ Hughes Drilling Equipment; cover page, pp. 7, 16; 1986.|
|3||Powerful Hydraulic Compact Top Drive Drilling System; Tesco Drilling Technology; 2 pp. Apr. 1998.|
|4||Varco General Catalog 2002; Varco L.P.: cover page; pp. 44, 45, 56, 65; 2002.|