Patent ID: 9080395
Filing Date: 2015-07-14
Classification: E21B,F16B,F16D,Y10T

Abstract:
1. A connection mechanism comprising: a drive section constructed as a sleeve and having a thread, a shaft element having a thread corresponding to the thread of the drive section and configured to be screwed into the drive section, and at least one interlocking element releasably connected with the shaft element; wherein the sleeve comprises at least one slotted through-hole defining an elongated opening extending in an axial direction of the sleeve, wherein the at least one interlocking element is configured for insertion into the at least one slotted through-hole and has a lateral dimension generally matching a transverse width of the at least one slotted through-hole, and wherein the elongated opening and the at least one interlocking element are sized so as to define a gap in the axial direction between ends of the at least one interlocking element and ends of the elongated opening such that no axial pressure load or axial tension load is placed on the at least one interlocking element during the transmitting of at least one of axial pressure and axial tension forces between the drive section and the shaft element.