| 主权项 |
1. A feeder assembly configured to transport blast media from a source of media into a flow of transport gas, the feeder comprising:
a. a rotor comprising a peripheral surface, the rotor being rotatable about an axis of rotation; b. a cavity defined by at least one cavity wall and a cavity bottom, the cavity comprising a cavity axis; c. a seal comprising a first surface, the first surface disposed adjacent at least a portion of the peripheral surface; d. a piston moveably disposed at least partially in the cavity, the piston being moveable along the cavity axis, the piston having a bottom; e. an inlet connectable to a transport fluid source; f. an outlet; g. a transport fluid flow path, at least a portion of the transport fluid flow path being defined by the seal and the piston, the transport fluid flow path comprising an entrance and an exit, the entrance being in fluid communication with the inlet, the exit being in fluid communication with the outlet; h. a pressure chamber defined by the piston and at least a respective portion of the at least one cavity wall and the cavity bottom, wherein the piston and the seal are configured such that pressure within the pressure chamber controls how much sealing force with which the first surface is urged against the peripheral surface. |
