Abstract: An internal combustion engine coolant fan assembly including a self contained thermally controlled clutch or externally controlled clutch having a housing and a fan blade assembly which is attached to the housing by a circular hub utilizing an interference fit or threaded connection. Preferably, the housing includes cooling fins, and the blade assembly circular hub is mounted on the outer edges of the cooling fins.

Abstract: A hydraulic cooling system for vehicles utilizing a hydraulic pump driven by the vehicle engine, the pump, preferably, having high and low volume chambers, a shroud adapted to be associated with the vehicle engine cooling radiator, a fan driven by hydraulic fluid pressurized by the pump for producing air flow through the shroud and the engine cooling radiator, and the hydraulic circuit between the pump and the fan motor includes a reservoir and a control valve sensitive to the engine coolant temperature. The control valve is located within the reservoir, and the reservoir is mounted upon the shroud and includes heat exchanging fins exposed to the air passage within the shroud. The entire combination of components may be pre-assembled and shipped and installed as a unit.

Abstract: A composite hose for use in automotive air conditioning systems employing "Refrigerant 12" (dichlorodifluoromethane) including an innermost three-ply tube having an elastomer inner tube ply, a middle tube ply of a thermoplastic polymer bonded to the inner tube ply, and an outer tube ply of an elastomer bonded to the middle tube ply. At least one textile yarn, cord or fabric reinforcement layer surrounds the three-ply tube and a specially compounded elastomer cover overlies the textile reinforcement. Suitable adhesives maybe applied between the inner and middle tube and between the middle and outer tube to provide a consolidated, co-acting tube element. A hose fitting is attached to an end of the composite hose to form a hose assembly.

Abstract: A quick connector assembly for interconnecting of two conduits in fluid flow relationship is provided. The connector assembly has an elongated tubular housing connected to one conduit and adapted to receive a terminal end portion of another conduit in axially inserted relationship. A retainer cap rotatably attachable to an end of the housing includes a plurality of spring fingers that project axially inwardly of the housing and that engage with an annular ring formed on the axially inserted conduit to mechanically engage therewith and lock together the housing and conduit with a fluid seal provided between the housing and conduit. A visual and tactile indicating mechanism is included to provide a perceivable indication that the housing and conduit are mechanically interlocked.

Abstract: A microwave low pass harmonic absorber having a main waveguide which passes a desired fundamental frequency. A plurality of shunt waveguides are disposed on the walls of the main waveguide for providing an absorptive path for the harmonic energy. Each of the shunt waveguides includes at least one ridge for lowering the cutoff frequency of the shunt waveguide. In another embodiment, the shunt waveguides include two ridges disposed opposite each other.

Abstract: A microwave feed forward passive coupling system for separation of at least a first and a second signal portion into at least first and second signal components of differing frequencies. The first and second signal portions have a majority of the second and first components respectively and a minority of the first and second components respectively. A second sample of the second signal portion and a part of the first signal portion are combined to produce substantially the second component. In addition, a first sample of the first signal portion and a part of the second signal portion are combined to produce substantially the first component.

Abstract: A microwave tuning screw assembly mounted in an opening in a cavity or waveguide and providing positive shorting at an inner wall of the cavity or waveguide. A chuck section is disposed in the opening and has elastically deformable fingers. A tuning screw section is received within the fingers so that as the fingers are elastically deformed inwardly, they grip the tuning screw section and thus provide positive shorting from the inner wall through the chuck section to the tuning screw section.

Abstract: A multicavity waveguide filter in which each of the cavities has a pair of orthogonally related modes of propagation. The cavities are positioned side by side with the long axis of each of the cavities being aligned parallel to each other. The cavities are tuned by tuning plungers which are simultaneously moved to predetermined positions within the cavity.