Abstract: A power absorbing termination for a waveguide transmission line comprised of a waveguide section containing a fluid carrying dielectric taper which is inclined relative to the waveguide axis so that the point end of the taper lies against the guidewall of the waveguide section. Fluid in the dielectric taper is preferably circulated around a center planar divider extended down the taper's axis; alternatively, fluid is circulated through the taper by inducing a spiral flow of fluid in the taper hollow.

Abstract: A hydraulically actuated jam release system for a jaw type rock crusher wherein a massive, mechanically rigid retracting plate is disposed behind the crusher's stationary jaw to engage the entire width of the jaw to hold the stationary jaw in its operative position. Mechanical locking pins are hydraulically actuated by vertical hydraulic cylinders to mechanically lock the retracting plate in its forward position, and separate horizontal hydraulic retracting cylinders are provided to retract the retracting plate when the mechanical locking pins are disengaged therefrom, and to return the retracting plate to its forward position after the non-crushable material has been released from the crushing chamber of the crusher. The entire hydraulic system for the jam release is hydraulically operated through a series of suitable hydraulic valves preferably located at a central control station.

Abstract: A fluid material flow control valve comprised of a conduit having an inlet end and an outlet end, and a remotely inflatable valving element disposed in the conduit between its inlet and outlet end such that the conduit can be variably opened to fluid flow by variably inflating the valving element and such that the conduit will always be closed to fluid flow when the valving element is deflated such as by intentionally withdrawing the inflating pressure source or through an accidental loss in system pressure.

Abstract: An abrasive blast system comprised of an abrasive media holding tank, a pressurized air supply, a remotely controllable inlet and outlet valve means for pressurizing and depressurizing said holding tank, a remotely controllable abrasive flow control valve capable of modulating the flow of the abrasive blasting media, and a remote control valve disposed to be operated by the operator of the abrasive blast system for remotely controlling the inlet and outlet valve means, as well as the abrasive flow control valve.

Abstract: A self-cleaning muffler for an abrasive blast system comprised of a chamber element having side walls, an end wall, and an inlet portion opposite said end wall, means for attaching the inlet portion of said chamber element to the exhaust outlet means of the abrasive blast system, perforation means in the chamber element side walls to permit gaseous media to escape from said chamber element, but preventing particulate media from passing therethrough, a particulate media outlet means in the end wall of said chamber element, and means for closing said particulate media outlet means substantially during exhausting of the abrasive blast system and opening the particulate media outlet means when the abrasive blast system is not exhausting.