Patent ID: 6494607
Filing Date: 2002-12-17
Classification: B29B

Abstract:
A four wing rotor for use in an internal, intensive batch mixing machine, the rotor having an axis and an axial length from a first end of the rotor to an opposite second end of the rotor and having multiple wings of generally helical configuration including first and second long wings and first and second short wings;the first long wing originating at the first end of the rotor at about 0Â° angular position relative to the rotor axis and having a wing tip oriented to the rotor axis at a helix angle of between about 45Â° and 60Â° and having an axial length of between about 60% to about 80% of the axial length of the rotor and an approach angle in the range of from about 25Â° to 60Â°; the second long wing on the rotor originating at the second end of the rotor at about 220Â° to about 240Â° angular position relative to the rotor axis and having a wing tip oriented to the rotor axis at a helix angle of between about 20Â° to 40Â° and having an axial length of between about 60% to 80% of the axial length of the rotor and an approach angle of between about 15Â° and 25Â° with the proviso that the approach angle of the first long wing is greater than the approach angle of the second long wing by at least 5Â°; the wing tips of each of the first and second long wings having a width, as measured normal to the helix angle of the wing, with the width of the first long wing tip being at least 50% wider than the width of the second long wing tip; the first short wing on the rotor originating at the first end of the rotor at an angular position in the range of about 170Â° to about 190Â° relative to the rotor axis, having a wing tip oriented to the rotor axis at a helix angle in the range of from about 25Â° to 60Â°, and having an axial length of between about 10% and 30% of the axial length of the rotor; the second short wing on the rotor originating at the second end of the rotor at an angular position in the range of about 350Â° to about 20Â° relative to the rotor axis, having a wing tip oriented to the rotor axis at a helix angle in the range of from about 25Â° to 60Â°, and having an axial length of between about 10% and 30% of the axial length of the rotor; and each of the first and second long wings and first and second short wings having their wing tips an essentially equivalent radial distance from the axis of the rotor.