Abstract: A vadose zone for a leaching field which enables the construction of a leaching field in terrain where conventional leaching fields cannot be constructed. Such terrain also comprise areas where a high water table exists or where percolation tests fail. The vadose zone is constructed adjacent to the leaching field which is buried in a layer of soil which has been constructed over a nonporous barrier such as a plastic sheet or ledge or clay. The effluent from the leaching field is forced to move sideways out of the leaching field into the adjacent soil. The adjacent soil becomes a vadose zone to complete treating the effluent. The effluent is forced to flow through a prescribed predetermined distance through the vadose zone before it is permitted to disperse through the soil toward the water table or over the clay or ledge.

Abstract: The invention is directed to a sewage treatment system and method for treating sewage by microbes. The system includes and the method uses a settling tank with residual activated sludge and mixed liquor and an activated biofilm filter. Incoming sewage into the settling tank forms a settling tank liquor mixed liquor. Increments of the settling tank liquor mixed liquor are treated in the activated biofilm filter and returned to the settling tank where the treated mixed liquor improves the quality of the settling tank liquor mixed liquor in the settling tank. The process of treating and returning incremental quantities of the settling tank liquor mixed liquor continues over a Predetermined period of time after which the sewage is fully treated.

Abstract: The invention is directed to a sewage treatment system comprising a tank in which biological treatment by microorganisms occur in mixed liquor and a circulating loop for removing mixed liquor from the tank and returning oxygen enriched aerated mixed liquor to the tank. The mixed liquor is removed and returned to the tank through a pair spaced apart submerged filters. One alternative construction is to use a pressure tank in the circulation loop to increase the percentage of dissolved oxygen in the aerated mixed liquor.

Abstract: The invention is directed to composite preforms which comprise reinforcing fiber deposited in grooves pre-formed in a metal or ceramic foil.

Abstract: The invention is directed to a motor-driven apparatus such as a motor-driven chain saw and the like having a lubricating oil pump having a piston which rotates about its central axis and an oil supply for a work tool. There is also a control means containing a rotating piston having cam member on the piston interacting with a control pin member which acts as a cam follower. There is provided means for adjusting the percentage of contact made between the cam member and the cam follower per revolution of the pumping member.

Abstract: The invention relates to a surface treatment for silicon carbide filaments. A carbon-rich silicon carbide layer or coating is formed over the silicon carbide surface. The ratio of silicon to carbon in the carbon-rich silicon carbide layer varies from 1 (stoichiometric) at the silicon carbide filament interface to about 0.43 (70% carbon, 30% silicon) at the exterior surface of the carbon-rich layer. A preferred method of making the carbon-rich silicon carbide layer is also presented.

Abstract: A shock absorbing hand grip comprises an inner elongated resilient tubular wall member adapted to slidably receive a supporting structure and an outer concentric resilient elongated tubular wall member spaced from the inner tubular wall member. A plurality of flexible spacer members are disposed between the inner and outer tubular wall members having a first end attached to the inner tubular wall member and a second end attached to the outer tubular wall member. The flexible spacer members are disposed between the inner and outer tubular wall members at an angle to the axial plane of said tubular members so as to create a region of bending flexure for the spacer member between the inner and outer tubular walls such that shock forces applied to one tubular wall member will cause a bending flexure of the spacer members whereby such shock forces are substantially completely displaced in a non-radial direction to the other tubular wall member.

Abstract: The invention is directed to a motor-driven apparatus such as a motor-driven chain saw and the like having a lubricating-oil pump and an oil supply for a work tool and to apparatus for varying the reciprocatory stroke distance of the oil piston or pumping member to thereby provide selective regulation of oil flow from full flow to through no flow in response to the stroke distance of the pumping member.

Abstract: The invention relates to means and method of making a multiple castable structural panel in a single pouring operation. A mold-envelope constructed from a plurality of pieces is provided. The mold-envelope is constructed without any external fastening means. The poured core holds the pieces of the mold-envelope together.

Abstract: The invention is directed to a door assembly comprising a door and a side panel assembly having a front and a rear wall. The front wall is formed by one or more releasably secured panels which may be accessed from the front or from the rear through a panel in the rear wall.A mail slot is also described and claimed.

Abstract: An exhaust configuration for a gasoline engine where the exhaust gas is merged with an air stream in a direction counter to the direction of flow of the air stream for reducing noise and for supercharging the engine and for reducing the amount of oil that may become entrained in the exhaust stream.

Abstract: A high strength silicon carbide monofilament which has a core and a stoichiometric bulk layer of silicon carbide deposited on the core having an exterior surface and a core bulk layer interface, the bulk layer having an average grain size of less than 200 nanometers which size varies continuously across the cross section of the bulk layer, the variation comprising a first average grain size at the interface which increases to a maximum average grain size intermediate the interface and the exterior surface and then decreases to the minimum at the exterior surface. In an alternate embodiment a surface layer is deposited on the bulk layer of silicon carbide. A preferred method of making the silicon carbide monofilament is also presented.

Abstract: The invention deals with an oxidation protection system for an inhibited carbon substrate which comprises a friable layer applied to the carbon substrate surface. The friable layer is then coated with a dense oxidation resistant outer layer.

Abstract: The invention is directed to a lightweight debris collector for rotary mowers and the like. The debris collector includes a frame having two spaced apart arms which are adapted to suspend and transport a standard trash can. Means is also provided to transport debris from the mower to the trash can which together with the frame form a debris collector assembly.

Abstract: A blade guard system for power driven rotary saws having a drive shaft arm rotatable between inboard and outboard cutting positions relative to the chassis, a blade guard disposed about a portion of the saw blade and rotatably attached to the saw blade shaft. An arcuate track slot is disposed on the inner wall of the blade guard adjacent to the drive shaft arm. A blade guard adjust arm is pivotally mounted at one end to the drive shaft arm and the other end of the blade guard adjust arm being releasably attachable at selected locations along the track slot to position the blade guard in desired protective positions. When the blade guard adjust arm is released from the track slot, rotation of the blade guard and the blade guard adjust arm to selected protective positions is permitted without the need to remove the blade guard or blade from the saw blade shaft.

Abstract: The invention is directed to a debris collector bag for receiving grass clippings, leaves and debris which has a concave surface in which includes a concave slit opening from which the collected debris is removed.

Abstract: A shield for a string trimmer using a rotating flexible cutting element defining a circular perimeter including:a base wall generally parallel to the plane of the rotating cutting element and having a rear portion; andan arcuate rim member extending downwardly from a portion of the base wall, the rim member and the perimeter defining a pair of oppositely directed volute pathways each terminating in an opening, each of said pathways having a minimum width adjacent to the rear portion of the base wall which gradually increases in width from the rear portion to the opening.

Abstract: The invention is directed to a self regulating rotor for a centrifugal clutch. The rotor is designed to reduce the clearance between the rotor and the the drum by being stressed above its elastic limit as speeds above the normal engagement speed whereby any enlargement of the rotor diameter that occurs above the eleastic limit results in a permanent set.

Abstract: The invention is directed to a door assembly comprising a door and removable matching panels spaced to the side of the door forming the front wall of a side panel assembly. The side panel assembly includes an interior passage for placing accessories or appliances on the front wall. A novel mail box slot is also described.

Abstract: The invention is directed to a quadridge antenna situated within a quadri-fluted module. The tips of the ridge elements are recessed a distance below the surface of the window aperture.