Abstract: An anti-choke blender fitting used in a pneumatic conveyor system utilizing a negative pressure to transport milling stock material, the fitting including a body with a top surface joined by downwardly extending side walls terminating in an open bottom with a channel-shaped relief gate with upwardly extending side walls hingedly mounted to the body with a closed position of the relief gate closing the open bottom of the body in a non air-tight relationship with the side walls of the gate extending above the spout of the inlet conduit, thereby minimizing the leakage of milling stock around the periphery of the relief gate in its closed position.

Abstract: An apparatus for controlling the mixing of atmospheric air with return air from a building. The apparatus has a housing that includes a base baffle and a roof baffle disposed therein. A damper is pivotally secured to the base baffle, and another damper is pivotally secured to the roof baffle. The two dampers are interconnected pivotally by a damper linkage such that when the first damper is caused to be pivoted on and about the base baffle, the other damper pivots on and about the roof baffle. An actuator is provided such as to be supported by the base. The actuator pivotally connects to the damper that pivotally connects to the base baffle such that when the actuator is actuated, the damper that pivotally connects to the base baffle is caused to be pivoted on and about the same. A method for controlling the mixing of atmospheric air with return air from a building.

Abstract: A pneumatic conveying air velocity control apparatus comprising multiple pneumatic lifts including multiple cyclones, at least one manifold, and multiple pneumatic conduits intercommunicating the cyclones with the manifold and having a structure defining a venturi with a venturi inlet side and a venturi throat. Multiple sets of a first, second, and a third 2-way valve for each of the pneumatic lift are provided. The first 2-way valve pneumatically communicates with a pneumatic actuator and with a controller, and the second 2-way valve pneumatically communicates with the venturi inlet side and the controller; and the third 2-way valve pneumatically communicates with the venturi throat and the controller for detecting the pneumatic flow rate through the pneumatic conduit. A sequencer is provided for mechanically engaging at least one set of 2-way valve at any given time. A method for controlling the pneumatic velocity in a multiple lift pneumatic conveying air velocity control apparatus.

Abstract: An improved air stabilization system and method used in a refrigerator of a meat packing plant or the like. The improvement comprises positioning rotatably a single mixing damper blade within a damper blade housing such as to regulate the air flow through air openings within the housing.

Abstract: An improved air stabilization system and method used in a building ventilation system. The improvement comprises positioning rotatably a single mixing damper blade within a damper blade housing such as to regulate the air flow through air openings within the housing.

Abstract: An improved fluid pump having two or more cylindrical eccentric or elliptical rotors drive connected to revolve together at identical angular velocities, and positioned in cylindrical chambers for compressing fluids therein. The pump includes separate intake ports and discharge ports to and from the chambers allowing the pump to be used as a single stage pump or by connecting the discharge port of one chamber with the intake port of the other chamber the pump can be used as a two stage pump for increased pressure with less volume.

Abstract: A reciprocating airlock valve used in the transfer of granular and powdered stock between two operations and the maintenance of a pressure differential therebetween. The airlock valve designed to maintain an air seal between the two operations while providing continuous material flow through the valve.