Coupling assembly

An improved coupling assembly comprising:

• a hub shaft having an axial aperture;
• a sleeve having a closed end positioned over said hub shaft and mounted thereto for movement with said hub shaft, said sleeve having an axial aperture in said closed end aligned with said axial aperture of said hub shaft, said sleeve being longer than said shaft hub to define an internal radial groove separating said axial apertures;
• a member connectable to said hub shaft having a connecting portion comprising a cavity adapted to fit over said sleeve, said cavity containing a centrally located longitudinal projecting member for insertion through said axial apertures of said sleeve and said hub shaft, said projecting member having an axial bore extending therethrough with an actuating member slidable within said axial bore engaging radially extendable locking means in said projecting member to bias said locking means outwardly of the projecting member for engagement in said internal radial groove thereby preventing axial movement between said connectable member and said hub shaft, said actuating means having a narrowed section for selective alignment with said locking means so that said locking means is able to move inwardly of the projecting member out of the internal radial groove thereby releasing said connectable member for axial movement with respect to said hub shaft, said actuating means normally being biased by spring means to a position in which said locking means are engaged in said internal radial groove;
• and
• groove and key means between said connectable member and said sleeve to prevent rotation of said connectable member about said sleeve when said locking means are engaged in said internal radial groove.