Impeller and shield for mixing apparatus
OwnerWilliam D'Agostinoinventor
Life of this patent
Estimating the term…
Abstract
An impeller and shield for a mixing apparatus. A mixing member has upper and lower opposite faces and one or more apertures therethrough. Each of the apertures has an upper periphery defined by an edge of the lower face and a lower periphery defined by an edge of the upper face. The mixing member is preferably an otherwise substantially planar disc having a hole through the center for receiving a motor driven shaft. Preferably, a separate shield member having upper and lower opposite surfaces and an aperture therethrough for receiving the shaft of the motor driven impeller is provided. The impeller and shield are used in combination to minimize the escape of particulate matter into the surrounding air during a mixing operation.
Claims5
An impeller for a mixing apparatus, comprising:
- a substantially planar disc having a hole through the center for receiving a motor driven shaft mixing member, said planar disc having upper and lower opposite faces and one or more apertures therethrough, with each of said apertures having an upper periphery defining an edge of said lower face and a lower periphery defining an edge of said upper face,
- wherein points of said lower face extend from said upper periphery at first angles with respect to the plane of the planar disc that are a function of the radial locations of said points, and
- wherein radially corresponding points of said upper face extend from said lower periphery at second angles that are substantially equal to the corresponding said first angles, and
- wherein said apertures have radially innermost ends and radially outermost ends at which said first and second angles are substantially zero, and
- wherein said first and second angles increase from each of said ends to reach a maximum substantially mid-way therebetween.
Dependencies are inferred from the claim text.