Abstract: A portable particle separator mounted on a frame with a collection chamber for particles and a vertical lifting unit having a pair of articulated parallel frame support elements hydraulically driven so that the collection chamber can be vertically moved to transfer particles to a dump truck. The particle separator includes a self-contained collection chamber with multiple inner chambers sealed by a common door. In an alternative embodiment, the portable particle separator includes a front floor conduit to pick up bulk particles and a front set of sweeper floor nozzles for small size particles.

Abstract: A hydraulically operated tailgate door which is pivotally hinged to move in an arc about the door hinge until the door is substantially vertical in position adjacent the door frame. Means are provided to enable the door to be moved substantially parallel to the door frame during movement from the closed position to a locked position. The same hydraulic cylinders provided for raising and lowering the door are also utilized for locking and unlocking the door.

Abstract: A compact, portable multi-stage vacuum particle separator with a first stage centrifugal separator, second stage linear separator concentrically mounted in the first stage, and a third stage air filter. All three separator stages deliver their separated particulate material into a common dump hopper. The second and third stages have flexible flap valves at their bottoms to automatically transfer accumulated, separated particles into the dump hopper when the unit is shut down.

Abstract: Apparatus for removing fins or flash from foundry sand cores, including a conveyor transporting the sand cores, means mounted above the conveyor for delivering a falling curtain of core cleaning material, such as metal shot or metal grit particles, from a reservoir onto the cores for removing the fins, means for separating the core cleaning material from loosened sand, and means for loading the reservoir with separated core cleaning material so the shot or grit can be reused. A single vacuum source and interconnecting conduits provide means for: (1) separating the shot/grit core cleaning material from loosened sand; (2) loading the reservoir with the separated shot/grit; and (3) transferring the separated loosened sand for use as needed.

Abstract: An improved linear accelerator separator wherein much higher kinetic energy can be imparted to the particulate matter thereby significantly increasing the separation efficiency as compared to the prior art. In particular, the particles and airstream are rapidly accelerated and directed into an expansion chamber which is sufficiently long to permit the particles to expand or spread out and fall to the chamber bottom and to permit the airstream to lose velocity and to back up or turn around and exit from the chamber entrance.

Abstract: A core cleaning material delivery unit for use in removing fins from foundry sand cores, including counter-rotating rollers rotatably engaging and defining a contact surface junction, means for feeding core cleaning material, such as metal shot or metal grit, above the junction, and means for rotating the rollers in opposite rotational directions away from the top of the contact surface junction to transport the shot or grit upwardly over each roller and deposit it as a double curtain of falling core cleaning material onto the sand cores.

Abstract: Truck mounted vacuum collector apparatus including first and second particle collection chambers having adjacent discharge openings for simultaneously emptying both chambers at a single discharge point. The second chamber is mounted on a platform forward of the first chamber. A passageway extends from the second chamber below the first chamber to a discharge opening immediately below a discharge opening in the first chamber. A hinged door covers both discharge openings. The chambers are emptied by hydraulically tilting the platform and allowing the door to swing open to permit the accumulated matter to empty from the first chamber through the corresponding discharge opening and from the second chamber through the second discharge opening via the passageway below the first chamber.

Abstract: An improved multistage particle separator apparatus including a cyclone separator, a linear separator, a pair of vertical channels carrying exit airstreams from said linear separator, and a pair of air filter chambers on each side of said linear separator. A portable multistage separator including integral means for collecting the separated particulate material and for supporting the separator during movement.

Abstract: Relief valve means for dissipating positive compressor pressures which could exist within an industrial vacuum unit after the unit is shut down. A high capacity one-way flow type of valve is mounted on the unit to allow a vacuum to be created within the unit during normal operation and to prevent a build-up of undesirable positive pressure that can result from the brief reverse operation of the compressor immediately after the power is shut off.