Importance

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Abstract

In a hand held multiple bit object implement having a handle with a central longitudinal axis, a bit selector cup rotatably mounted at an end of said handle to rotate about said central axis, a plurality of bits provided peripherally of said handle in a generally circular pattern about said handle axis, each bit being provided in said handle to extent essentially parallel to said handle's axis, a chuck provided at said end of said handle, said chuck being aligned with said handle axis for receiving a bit head, said cup having a continuous side wall with an interior surface spaced radially outwardly of the radial location of said circular pattern of bits and a closed cup end, an elongate slot extending from a central portion of said cup end and radially outwardly to the location of said bits in said handle, said cup being rotatable to position said slot in register with any desired bit in said handle, said slot in said cup being of sufficient size to permit withdrawal of a bit shaft from said handle in a direction generally parallel with said handle axis, said slot defining opposing cup slot wall portions along the length of the slot, said bit head having a plurality of outwardly projecting external faces portions of which contact said cup slot wall portions to retain said bit within said cup, said bit being movable along said slot towards said cup center into alignment with said chuck for insertion of said bit head into said chuck, the improvement comprising a locking unit mounted within an end of said cup having a slot formed therewith corresponding to the shape and size of the slot in the cup end, said locking unit being provided with a generally U-shaped internal sleeve extending through the cup and toward the chuck, said internal sleeve being provided with hexagonal faces adapted to cooperatively engage the faces of bit heads for guiding the head toward a chuck.

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First Claim