Power-driven mixing apparatus

Claim 1

POWER-DRIVEN MIXING APPARATUS COMPRISING A LONGITUDINAL SHAFT MEANS, NORMALLY VERTICALLY DIRECTED WHEN IN USE, HAVING AN UPPER PORTION ADAPTED TO BE ROTATIVELY DRIVEN BY A DRIVING MOTOR MEANS, SAID LONGITUDINAL SHAFT MEANS BEING PROVIDED WITH PROJECTING BLADE MEANS INCLUDING A FIRST PORTION THEREOF COMPRISING A PLURALITY OF INDIVIDUAL BLADES EACH BEING SUBSTANTIALLY TRANSVERSELY CARRIED BY SAID LONGITUDINAL SHAFT MEANS AT LONGITTUDINALLY SPACED LOCATIONS THEREALONG WITH SAID INDIVIDUAL BLADES BEING PROVIDED AT OPPOSITE ENDS THEREOF WITH DOWNWARDLY AND FORWARDLY DIRECTED BLADE TIP MEANS FOR RESATRICTING CENTRIFUGAL-FORCE-CAUSED OUTWARD SPLASHING OF A LIQUID MEDIUM ADAPTED TO BE MIXED BY THE BLADE MEANS WHEN ROTATED WITHIN A CONTAINER, EACH OF SAID PLURALITY OF INDIVIDUAL BLADES COMPRISING SAID FIRST PORTION OF SAID BLADE MEANS BEING INCLINED UPWARDLY AND FORWARDLY IN THE DIRECTION OF ROTATION THEREOF AND HAVING AN UPWARDLY AND FORWARDLY INCLINED BOTTOM SURFACE WHEREBY TO EXERT A DOWNWARD FORCE UPON A LIQUID MEIDUM TO BE MIXED DURING ROTATION OF SAID BLADE MEANS BY SAID DRIVING MOTOR MEANS, SAID PROJECTING BLADE MEANS ALSO INCLUDING A SECOND PORTION COMPRISING A BOTTOM BLADE SUBSTANTIALLY TRANSVERSELY CARRIED BY THE LONGITUDINAL SHAFT MEANS BELOW SAID PLURLAITY OF INDIVIDUAL BLADES COMPRISING SAID FIRST PORTION OF SAID BLADE MEANS AND BEING DOWNWARDLY FORWARDLY INCLINED IN THE DIRECTION OF ROTATION OF SAID LONGITUDINAL SHAFT MEANS AND HAVING A DOWNWARDLY AND FORWARDLY INCLINED UPPER SURFACE WHEREBY TO THROW UPWARDLY HEAVY CONSTITUTENTS OF THE LIQUID MEDIUM BEING MIXED BY SAID BLADE MEANS AND TO EXERT AN UPWARD FORCE THEREUPON, THE TOTAL AREA OF SAID UPWARDLY AND FORWARDLY INCLINED BOTTOM SURFACES OF SAID PLURALITY OF INDIVIDUAL BLADES COMPRISING SAID FIRST PORTION OF SAID BLADE MEANS BEING SUBSTANTIALLY GREATER THAN THE TOTAL AREA OF SAID DOWNWARDLY AND FORWARDLY INCLINED UPPER SURFACE OF SAID BOTTOM BLADE COMPRISING SAID SECOND PORTION OF SAID BLADE MEANS WHEREBY TO EXERT A NET DIFFERENTIAL DOWNWARD FORCE UPON THE LIQUID MEDIUM TO BE MIXED DURING ROTATION OF SAID BLADE MEANS BY SAID DRIVING MOTOR MEANS AND WHEREBY TO PRODUCE AN OPPOSITELY AND UPWARDLY DIRECTED NET DIFFERENTIAL REACTIVE FORE TENDING TO PARTLY NEURTALIZE THE WEIGHT OF THE DRIVING MOTOR MEANS, THE LONGITUDINAL SHAFT MEANS, AND THE BLADE MEANS, AND WHEREBY TO POSITIVELY PRODUCE VERTICAL CIRCULATION OF THE LIQUID MEDIUM WHICH IS TO BE MIXED BY REASON OF SAID UNBALANCED VERTICAL FORCES PRODUCED THEREON BY SAID FIRST AND SECOND PORTIONS OF SAID BLADE MEANS.