Mechanical coupling particularly adapted for coupling a valve and actuator

Apparatus for coupling a valve and an actuator which comprises:

• an elongated actuator drive member having an axial extremity having a drive surface and an elongated valve driven member having an axial extremity having a drive surface, one of said drive surfaces being an internal drive surface which has a polygon shaped cross section and one of said drive surfaces being an external drive surface which has a polygon shaped cross section;
• a first sleeve including at least a first wedge shaped surface having generally planar faces and a thin cross section axial part and a thick cross section axial part;
• said drive and driven members being disposed with said drive surfaces disposed in nested axially overlapping relationship with said first
• wedge shaped surface disposed radially intermediate said the respective drive surfaces;
• and
• means for urging said first wedge shaped surface of said first sleeve intermediate said drive surfaces of said drive and driven member.

Apparatus for mechanical coupling which comprises:

• an elongated drive member having an axial extremity having a drive surface and an elongated driven member having an axial extremity having a drive surface, one of said drive surfaces being an internal drive surface which has a polygon shaped cross section and one of said drive surfaces being an external drive surface which has a polygon shaped cross section;
• a sleeve including at least a first wedge shaped surface having generally planar faces and first and second axial cross sections, said second axial cross section axial being thicker than first axial cross section;
• and
• said drive and driven members being disposed with said drive surfaces disposed in nested axially overlapping relationship with said first wedge shaped surface disposed radially intermediate said the respective drive surfaces.