Faisal J. Yousef - Houston TX Robert F. Kane - Houston TX Joel Ham - Cypress TX David Mildren - Houston TX
Assignee:
Sandvik Rock Tools, Inc. - Bristol VA
International Classification:
E21B 1036 E21B 17042 F16B 3504 F16L 1506
US Classification:
175415
Abstract:
A thread coupling comprises two interconnected screw threads. Each of the screw threads has a root portion shaped as a portion of an ellipse. With respect to one of the threads having such a shape, the major axis of the ellipse is longer than that of the other thread.
Screw Thread Structure For Percussion Drill Driver Sub And Case
Faisal J. Yousef - Houston TX Robert F. Kane - Houston TX Joel Ham - Cypress TX David Mildren - Houston TX
Assignee:
Sandvik Rock Tools, Inc. - Bristol VA
International Classification:
E21B 1036 F16B 3504
US Classification:
175320
Abstract:
A driver sub and a case for enclosing a piston chamber of a percussion drill are threadedly connected by respective identical male and female screw threads. Each of the identical male and female screw threads includes a root portion, the shape of which is defined by portions of two axially overlapping ellipses interconnected by a flat.
Faisal J. Yousef - Houston TX Robert F. Kane - Houston TX Joel Ham - Cypress TX David Mildren - Houston TX
Assignee:
Galloway Trust - Neenah WI
International Classification:
E21B 1036 F16B 3504
US Classification:
175415
Abstract:
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.
Name / Title
Company / Classification
Phones & Addresses
David Mildren General Manager
Sandvik Mining & Construction USA LLC Mfg Mining Machinery · Mfg Mining Machinery Mfg Power-Driven Handtools Mfg Machine Tool Accessories