Screw thread structure

F - Mech Eng,Light,Heat,Weapons – 16 – B

Patent

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Details

F16B 23/00 (2006.01) E21B 17/042 (2006.01) F16B 33/02 (2006.01)

Patent

CA 2042879

SCREW THREAD STRUCTURE ABSTRACT OF THE DISCLOSURE A screw thread structure includes a root portion, the shape of which is defined by portions of two axially overlapping ellipses interconnected by a flat.

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