Abstract: A sewerage aerator is illustrated having an air feed diffuser with air opening adjustably positioned approximate venturi throat located above the liquid sewerage tank level and having means to introduce the liquid sewerage to the upper venturi chamber and cause it to flow past the air openings.

Abstract: A reaction plate assembly for use in a hydraulic torque wrench is disclosed comprising a reaction plate having a perimeter section provided with a series of spaced apart bolt openings and an adjacent perimeter section provided with at least one ring nut, bolt opening, a clevis pivotly mounted at one end by a bolt means at one of said series of bolt openings, the clevis having an opposite end pivotly mountable to a hydraulic cylinder, and a nut ring mounted at one end by a second bolt means to the adjacent perimeter section and provided with a nut opening having a cross-sectional shape to rotatably fit about a nut head.

Abstract: A process for manufacturing a unique hazardous waste transport container liner is provided wherein an extruded plastic sheet is folded into a "W" shape and heat sealed at one end, then cut to a length to fit the transport container and then heat sealed at the cut end of the sheet.

Abstract: An improved apparatus for deheading and peeling crayfish comprising pairs of gripper assemblies for operative engagement with the head and tail sections of a crayfish, respectively, supported for movement in synchronized relation through separate but tangentially related orbits wherein the pairs of grippers simultaneously move in a common direction through or past the point of tangency of their respective orbits wherein the tail holding gripper assemblies each comprise a lower crayfish pan constructed from flexible rubber or plastic member having an arcuate cross section greater than 180.degree. and a top arm member pivotly mounted above the lower pan to hold the crayfish in the pan during the deheading cycle, the pivoting of top arm member being actuated by a simplified cam assembly.

Abstract: A continuous force control (CFC) brace for expansion of the lower oral arch is disclosed comprising a first wire attached at each end to opposite molar teeth and positioned to prevent movement of pre-determined teeth and a second wire attached to the middle section of the first wire and extending outward from both sides thereof, the second wire being constructed from smaller diameter wire than the first wire and positioned to apply a small continuous force against those teeth which are desired to be repositioned.

Abstract: Garments for the protection of a football player's jaws are disclosed utilizing lightweight overlapping flexible jointed flap members attached together by cloth padding to cover the player's jaws and other parts of the face.

Abstract: A protective flood barrier comprising panels sealingly attachable to one another to form a continuous barrier around a building structure and sealingly attachable to a fixed foundation surrounding the structure.

Abstract: A continuous force control arch expander for use in orthodontics is provided comprising a set of anchor bands with expansion wires rigidly and tangentially attached to said anchor bands.

Abstract: A process and apparatus for treatment of waste water is provided wherein a waste water clarifier is positioned in a waste water flow channel and having a body assembly provided with a bow section facing into and extending above the waste water current, a stern section having an opening below the waste water level to allow the waste water to enter the clarifier, a bottom section constructed from rows of baffle plates wherein the rows are separated from one another by openings to allow the solids settled in the clarifier to re-enter the waste water flow channel, and an effluent launder fixedly positioned in the bow section.

Abstract: An improved process for enzymatic hydrolysis of mammal, fish and plant protein containing material characterized by the utilization of vacuum conditions during the hydrolyzing phase of the process to selectively remove the odoriferous compounds.

Abstract: A wet caustic aluminate process that comprises digesting a bauxite at a low temperature in caustic aluminate liquor to extract the alumina trihydrate, separating the supersaturated caustic aluminate liquor of low Fe.sub.2 O.sub.3 content from the mud, digesting the mud or a mixture of mud and bauxite at a higher temperature in caustic aluminate liquor to extract the majority of the remaining monohydrate and trihydrate, separating the supersaturated caustic aluminate liquor of higher Fe.sub.2 O.sub.3 content from the residue, precipitating alumina hydrate from the two supersaturated caustic aluminate liquors, recyling spent caustic aluminate liquor to digestion and calcining alumina hydrate to alumina with a Fe.sub.2 O.sub.3 content less than 0.03%.

Abstract: Garments for the protection of a football player's ribs and jaws are disclosed utilizing lightweight overlapping flexible jointed flap members attached together by cloth padding to cover the player's rib cage or other parts of the body.

Abstract: A dice game and teaching aid utilizing three dice, or the mechanical equivalent thereof each dice being tri-colored wherein the numbered sides 1 and 2 are one color, the numbered sides 3 and 4 are a second color, and the numbered sides 5 and 6 are a third color comprising the steps of a player placing at risk some object, rolling the dice and rewarding the player if the dice come up one color or one of each color or all of the color of sides 3 and 4 or all of a particular number or the total in the three numbers rolled is greater than eleven.

Abstract: An elastic band projector is disclosed having a loading and firing mechanism for sequentially firing more than one elastic band without stopping to reload the elastic bands on the projector.

Abstract: An apparatus for producing particles of essentially uniform size from plastic materials is provided comprising two oppositely rotating drums positioned parallel and adjacent one another to form a nip, one drum being hollow and having uniformly distributed perforations over a portion of its surface area; a scraper assembly which is located inside the hollow perforated drum; and a discharge means which ejects particles from the interior of the hollow drum.

Abstract: An assembly for paving concrete roads and other similar areas is disclosed having a width adjustable screed attached to a lightweight frame structure and utilizing mechanical vibrators in conjunction with a crown-shape finishing pan to produce a finished concrete road.

Abstract: A power driven device for removing shingles from roof surfaces is disclosed having a reciprocating plate with a notched forward edge that moves in a concave arc during the reciprocating movement.

Abstract: A linking arm having a bolt or nut receiving unit offset at one end of an arm member whose opposite end is attachable to a torque wrench for tightening or loosening the bolt or nut.