Abstract: A blower module which is sufficiently quiet to be placed in occupied buildings and not require the construction of a separate blower building; each blower module is a cylinder having conic drip cap on its top, a positive displacement blower, typically, a rotary piston or Roots type blower, and electric or otherwise powered motor to drive the blower, a labyrinth passage outlet silencer, and a labyrinth passage inlet silencer; and the blower module being shaped for sanitation, mechanical containment, noise abatement and stacking one blower on top of another.

Abstract: A flowable bulk product discharge activator and method of discharging flowable bulk products assures uniform, mass-flow discharge of loose, dry, flowable, bulk products from bulk storage containers that is void of any internal horizontal ledges to interrupt downward flow, while including sanitary features that impart a sifting/activating action to the flowable products discharging from the container. The product discharge activator has knife-sharpened and angled supports, a baffle, vertically oriented sifting plates all disposed in a vibratable chamber, the chamber joined to a vibrating motor.