Abstract:
A mixing apparatus for pulverulent materials includes guide rods carrying a pair of opposed pressure plates having centers aligned along a common axis of rotation. A tubular frame encloses a three-dimensional volume disposed about said guide rods and pressure plates to shield the guide rods and pressure plates from inadvertent contact, and to mount an electric motor. The pressure plates are locked in position by a transmission shaft which is geared to a lead screw which engages the pressure plates.
Abstract:
To support a deck of an exercise treadmill one or more arcuate leaf springs are used in a deck support structure. The leaf springs can be made of a single member of elastomeric material. An adjustment mechanism can be used to changed the radius of the leaf springs in order to vary spring rates of the leaf springs. Where a number of different leaf springs are used, the adjustment mechanism can be used to adjust the spring rates of different springs independently.