Material handling apparatus

Claim 1

MATERIAL HANDLING APPARATUS COMPRISING: A SUPPORT BRACKET HAVING A PAIR OF UPPER AND LOWER, VERTICALLY SPACED, PARALLEL ARMS; A MAST FRAME HAVING A PAIR OF UPPER AND LOWER, VERTICALLY SPACED, PARALLEL ARMS EACH OF WHICH HAS VERTICALLY SPACED INNER AND OUTER PORTIONS AT THE ENDS THEREOF; MEANS PIVOTALLY CONNECTING THE UPPER AND LOWER MAST FRAME ARMS WITH THE UPPER AND LOWER SUPPORT BRACKET ARMS, RESPECTIVELY, WITH THE UPPER SUPPORT BRACKET ARM RECEIVED BENEATH THE OUTER PORTION AND ABOVE THE INNER PORTION OF ITS ASSOCIATED MAST FRAME ARM, AND THE LOWER SUPPORT BRACKET ARM RECEIVED BENEATH THE INNER PORTION AND ABOVE THE OUTER PORTION OF ITS ASSOCIATED MAST FRAME ARM; A ROTARY MOTOR HAVING A HOUSING AND A ROTATABLE SHAFT PROJECTING THEREFROM, MEANS DETACHABLY CONNECTING THE MOTOR HOUSING TO THE SUPPORT BRACKET BETWEEN THE INNER PORTIONS OF THE MAST FRAME ARMS SUCH THAT THE MOTOR SHAFTS IS MOVABLE INTO COAXIAL RELATIONSHIP WITH THE PIVOTAL AXIS BETWEEN THE MAST FRAME AND SUPPORT BRACKET; AND COUPLING MEANS DETACHABLY MOUNTED ON THE INNER PORTION OF ONE OF THE MAST FRAME ARMS HAVING AN OPENING COAXIAL WITH THE PIVOTAL AXIS BETWEEN THE MAST FRAME AND SUPPORT BRACKET FOR RECEIVING THE MOTOR SHAFT; THE MOTOR SHAFT AND THE OPENING IN SAID COUPLING MEANS BEING SECURED AGAINST ROTATION RELATIVE TO EACH OTHER WHEN THE SHAFT IS RECEIVED IN THE OPENING TO COUPLE THE MOTOR SHAFT TO THE MAST FRAME INDEPENDENTLY OF THE PIVOTAL CONNECTION BETWEEN THE MAST FRAME AND SUPPORT BRACKET TO CAUSE THE MAST FRAME TO PIVOT RELATIVE TO THE SUPPORT BRACKET WHEN THE SHAFT IS CAUSED TO ROTATE BY SAID MOTOR, WHEREBY SAID MOTOR IS SELECTIVELY REMOVABLE FROM THE SUPPORT BRACKET AND DETACHABLE FROM THE MAST FRAME INDEPENDENTLY OF THE CONNECTION BETWEEN THE MAST FRAME ARMS AND SUPPORT BRACKET ARMS.