Jaw insert for gripping a cylindrical member and method of manufacture
AssigneeNational-Oilwell, L.P.
InventorJaroslav Belik
Life of this patent
Estimating the term…
Abstract
An insert for use in a gripping assembly is disclosed. The insert includes a base member having a plurality of gripping teeth. The teeth are arranged in at least two substantially adjacent rows, where at least one row of teeth is offset or staggered longitudinally from an immediately adjacent row of teeth. When the teeth engage a cylindrical member, a resistance profile is created that is substantially continuous and does not oscillate over a length of the insert approaching 100% of the length of the entire insert.
Claims20
An insert for use in a gripping apparatus, the insert comprising:
- a base member having a longitudinal axis and a perpendicular axis;
- a plurality of teeth extending from said base member, each of said teeth having a width, and wherein said teeth are formed in a first and second row, said first and second rows being substantially adjacent and parallel to said longitudinal axis;
- wherein said teeth in said first row are offset longitudinally from said teeth in said second row;
- and
- wherein at least one of said teeth further includes a crest having a crest length, said crest length being less than said width of said one tooth.
An insert for use in a gripping apparatus, the insert comprising:
- a base member having a longitudinal axis and a perpendicular axis;
- a plurality of teeth extending from said base member, each of said teeth having a first and second gripping face and a first and second side face, and wherein said teeth are formed in at least two substantially adjacent rows;
- wherein each of said rows has gaps between said side faces of adjacent of said teeth;
- and
- wherein said gaps within one of said rows are substantially aligned parallel to said perpendicular axis with said gripping faces of said teeth in another of said rows.
An insert for use in a gripping apparatus, the insert comprising:
- a base member having a longitudinal axis and a perpendicular axis;
- a plurality of teeth extending from said base member, each of said teeth having a width, a first and second gripping face, and a first and second side face, wherein said teeth are formed in a first and second row, said first and second rows being substantially adjacent and parallel to said longitudinal axis;
- wherein said first row is offset longitudinally from said second row;
- and
- wherein said teeth are canted.
An insert for use in a gripping apparatus, the insert comprising:
- a base member having a longitudinal axis and a perpendicular axis;
- a plurality of teeth extending from said base member, each of said teeth having a first and second gripping face and a first and second sloping side face, and wherein said teeth are formed in at least two substantially adjacent rows;
- wherein each of said rows has gaps between said side faces of adjacent said teeth;
- and
- wherein said gaps are set at an angle relative to said perpendicular axis, said gaps in one of said rows being aligned with said gaps in each substantially adjacent row.
Dependencies are inferred from the claim text.