Splineless coupling means

In combination, splineless coupling means, comprising:

• an imperforate first member, rotatable about an axis, engageable with a second member for transmission of rotation therebetween from one of said members to the other thereof;
• wherein
• said first member has a prominent structure, defining a boss or hub or the like;
• said structure is of non-circular cross-section, and has a peripheral surface, circumjacent said axis;
• and
• a second member, also rotatable about said axis, engageable with said first member for transmission of rotation therebetween, as aforesaid;
• wherein
• said second member has a void formed therein defined by an inner surface of a circumscribing wall;
• and
• said inner surface has a non-circular conformation, corresponding to said non-circular cross-section, for defining an intimately-interfaced coupling engagement thereof with said cross-section;
• and
• means for securing said wall and structure together in fast coupled engagement;
• wherein
• said second member is an elongate element;
• said element is hollow fully throughout the length thereof;
• said structure has a threaded bore formed therein;
• said securing means comprises (a) an apertured thrust collar for engaging a first end of said second member and (b) a headed bolt for penetrating and engaging said collar, extending through said hollow toward the opposite end of said second member, and threadedly engaging said bore;
• said collar has a substantially annular land formed thereon for engaging said first end of said second member;
• and
• said land is of non-circular cross-section, corresponding to said non-circular conformation of said inner surface of said second member to define an intimately-interfaced coupling engagement thereof with said inner surface.