1975-03-24
1976-05-11
Gilreath, Stanley N.
259116, B01F 1100
Patent
active
039558029
ABSTRACT:
A stirring rod is inserted through a resilient suspension diaphragm which is sealably secured to the underside of a closure for a flask or container. An L-shaped support bracket is attached to the outer, upper surface of the closure. The upstanding leg of the bracket carries an expansible pressurizable chamber which is connected, on its outerside, to a supply of single phase ACA and, on its innerside, to the upper portion of the stirring rod extending above the closure by a horizontal link which, at one end, is fitted over the stirring rod and at the opposite end is secured to the expansible chamber. The horizontal leg of the bracket which is secured to the closure carries, at its extremity opposite the upstanding leg, support means, to the upper end of which is attached a camming plate. The camming plate extends toward the upper portion of the stirring rod but stops short of this portion to allow controlled lateral movement of the stirring rod toward the camming plate. The edge of the camming plate nearest the stirring rod is set at an angle with reference to the direction of the lateral movement of the link resulting from the application of the single phase ACA. As a result of this angular relationship, a component of force in a direction at a right angle to the movement of the link is introduced when the stirring rod contacts this edge. This component of force is in a horizontal plane parallel to, preferably below, the horizontal plane in which the link is moving. As a result, the stirring rod is caused to deviate from its movement in the horizontal X plane into a continued movement into the Y plane to the limit imposed by the movement of the link as its movement is continued by the positive pressure. The application of the cycle of negative pressure to the chamber causes the upper stirring rod portion to return with the link. The path thus scribed by the stirring rod has become orbital in form in liew of a simple back and forth path in the X plane. This stirring apparatus permits the flask to be placed vertically or to be inclined.
REFERENCES:
patent: 1393799 (1921-10-01), Laurick
patent: 3468520 (1969-09-01), Duryea et al.
patent: 3484204 (1969-12-01), Caviness
Frank William F.
Gilreath Stanley N.
Massenberg Donald B.
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