Mixing apparatus

Claim 1

APPARATUS FOR MIXING DRYWALL CEMENT IN A CYLINDRICAL CONTAINER WHICH COMPRISES A ROTATABLE VERTICAL SHAFT PROVIDED WITH AN UPPER END AND A LOWER END, A FIRST PART OF FIRST AND SECOND HORIZONTAL BLADES VERTICALLY SPACED FROM SAID LOWER END OF SAID VERTICAL SHAFT AND RESPECTIVELY SECURED AT FIRST AND SECOND PREDETERMINED ANGLES OF EQUAL MAGNITUDE BUT OPPOSSITE ORIENTATION TO DIAMETRICALLY OPPOSITE POINTS ON SAID VERTICAL SHAFT SO THAT THE LEADING EDGES OF SAID FIRST HORIZONTAL BLADE AND SAID SECOND HORIZONTAL BLADE ARE RESPECTIVELY INCLINED AT SAID FIRST AND SECOND PREDETERMINED ANGLES TOWARD SAID UPPER END OF SAID VERTICAL SHAFT, WHEREIN THE COMBINED HORIZONTAL EXTENSION OF SAID FIRST PAIR OF HORIZONTAL BLADES IS SMALLER THAN SAID UNIFORM DIAMETER OF SAID CYLINDRICAL CONTAINER, A SECOND PAIR OF THIRD AND FOURTH HORIZONTAL BLADES COPLANAR WITH SAID FIRST PAIR OF HORIZONTAL BLADES AND RESPECTIVELY SECURED AT CORRESPONDING THIRD AND FOURTH PREDETERMINED ANGLES OF EQUAL MAGNITUDE BUT OPPOSITE ORIENTATION TO DIAMETRICALLY OPPOISTE POINTS ON SAID LOWER END OF SAID VERTICAL SHAFT SO THAT SAID FIRST AND THIRD HORIZONTAL BLADES ARE VERTICALLY SPACED FROM SAID ANOTHER AND SAID SECOND AND FOURTH HORIZONTAL BLADES ARE VERTICALLY SPACED FROM ONE ANOTHER, WHEREIN THE LEADING EDGES OF SAID THIRD AND FOURTH HORIZONTAL BLADES PREDETERMINED ANGLES TOWARD SAID THIRD AND FOURTH PREDETERMINED ANGLES TOWARD SAID LOWER END OF SAID VERTICAL SHAFT, AND THE COMBINED HORIZONTAL EXTENSION OF SAID SECOND PAIR OF HORIZONTAL BLADES IS EQUAL TO THE COMBINED HORIZONTAL EXTENSION OF SAID FIRST PAIR OF HORIZONTAL BLADES, A FIRST PAIR OF FIRST AND SECOND VERTICAL BLADES HORIZONTALLY SEPARATED FROM ONE ANOTHER BY A SPACING EQUAL TO SAID COMBINED HORIZONTAL EXTENSIONS OF SAID FIRST AND SECOND PAIRS OF HORIZONTAL BLADES AND SECURED BETWEEN SAID FIRST AND SECOND PARIS OF HORIZONTAL BLADES, WHEREIN SAID FIRST VERTICAL BLADE IS SECURED BETWEEN SAID FIRST AND THIRD HORIZONTAL BLADE SO THAT THE LEADING EDGE OF SAID FIRST VERTICAL BLADE IS PARALLEL TO AN INCLINED AWAY FROM SAID VERTICAL SHAFT, AND SAID SECOND VERTICAL BLADE IS SECURED BETWEEN SAID SECOND AND FOURTH HORIZONTAL BLADES SO THA SAID SECOND VERTICAL BLADE IS PARALLEL TO SAID FIRST VERTICAL BLADE, A SECOND PAIR OF THIRD AND FOURTH HORIZONTALLY SEPARATED VERTICAL BLADES SECURED BETWEEN SAID FIRST AND SECOND PAIRS OF HORIZONTAL BLADES, WHEREIN SAID THIRD VERTICAL BLADE IS SECURED BETWEEN SAID FIRST AND THIRD HORIZONTAL BLADES AT A HORIZONTAL SPACING EQUIDISTANT FROM SAID VERTICAL SHAFT AND SAID FIRST VERTICAL BLADE, SAID SAID FOURTH VERTICAL BLADE IS SECURED BETWEEN SAID SECOND AND FOURTH HORIZONTAL BLADES AT A HORIZONTAL SPACING EQUIDISTANT FROM SAID VERTICAL SHAFT AND SAID SECOND VERTICAL BLADE AND EACH OF SAID THIRD AND FOURTH VERTICAL BLADES IS PARALLEL TO AND OFFSET IN OPPOSITE DIRECTIONS FROM A VERTICAL AXIS PASSING THROUGH THE CENTER OF SAID VERTICAL SHAFT AND PARALLEL TO THE LEADING EDGES OF SAID FIRST AND SECOND PAIRS OF HORIZONTAL BLADES SO THAT SAID THIRD VERTICAL BLADE IS PARALLEL TO AND NEARER THE LEADING EDGES OF SAID FIRST AND THIRD HORIZONTAL BLADES AND SAID FOURTH VERTICAL BLADE IS PARALLEL TO AND NEARER THE LEADING EDGES OF SAID SECOND AND FOURTH HORIZONTAL BLADES.