Abstract: Thermoplastic parts are made of predominantly single unit thickness but with marginal areas of increased thickness by molding two parts in a common mold having overlapping mold portions. Two thicknesses of thermoplastic material are molded together in the areas of increased thickness at opposite ends of the common mold and the parts are separated from one another by trimming such that each part has an area of increased solid wall thickness and an area of reduced thickness.

Abstract: Thermoplastic parts are made of predominantly single unit thickness but with marginal areas of increased thickness by molding two parts in a common mold having overlapping mold portions. Two thicknesses of thermoplastic material are molded together in the areas of increased thickness at opposite ends of the common mold and the parts are separated from one another by trimming such that each part has an area of increased solid wall thickness and an area of reduced thickness.

Abstract: The invention provides an indoor livestock confinement system that includes a plurality of hollow plastic panels. Each panel includes a plurality of spaced tabs at its ends. A first end of each panel includes a first set of tabs, and a second end of each panel includes a second set of tabs. Each set of tabs includes at least one tab at a top portion of the end, at least one tab at an intermediate portion of the end, and at least one tab at a lower portion of the end. The tabs of the first set are offset vertically from the tabs of the second set such that the first set of tabs of a first panel fit vertically between the second tabs of another panel when the ends of the panels are put together. Each tab includes a hole such that a rod can be inserted down through the tabs to lock the panels together. The livestock confinement system may include additional features, such as ventilation components, reinforced panels, and bucket holders.

Abstract: A cab for a vehicle, such as an all terrain vehicle, a tractor, or small construction vehicle, is constructed of twin-sheet plastic panels that can be easily assembled, preferably with snap-together interlocking features. One of the panels can be a door panel having a door hinged to a door frame to control passage through a doorway. Both the door and the door frame have spaced apart hinge knuckles that interleave along a hinge axis to allow the door to pivot about a hinge pin. The door and door frame can be molded in a single twin-sheet panel. The two walls of the panel are fused together along the outer periphery of the panel door portion and the inner periphery of the panel door frame portion. The door is separated from the door frame by cutting the each of the walls along a door perimeter between the door and door frame portions of the molded panel.

Abstract: A cab for a vehicle, such as an all terrain vehicle, a tractor, or small construction vehicle, is constructed of twin-sheet thermo-plastic panels that can be easily assembled, preferably with snap-together interlocking features. One of the panels can be a door panel having a door hinged to a door frame to control passage through a doorway. Both the door and the door frame have spaced apart hinge knuckles that interleave along a hinge axis to allow the door to pivot about a hinge pin. The door and door frame can be molded in a single twin-sheet panel. The two walls of the panel are fused together along the outer periphery of the panel door portion and the inner periphery of the panel door frame portion. The door is separated from the door frame by cutting the each of the walls along a door perimeter between the door and door frame portions of the molded panel.

Abstract: A molded plastic skid base for a resin building is formed with all of its openings facing downward and with runners integral with a deck that forms a floor of the base. Replaceable wear plates cover the bottoms of the runners and have truck loading notches molded at their ends and a longitudinal channel in which fastener heads are positioned. Stake down slots are provided in the ends of the runners and wear plates in a diagonal orientation so as to be aligned toward the center of the building, below the base. The floor of the base is a grid formed of diagonally oriented ribs, at least some of which may be shorter in their center than at their ends, is crowned in the center and has openings which taper upwardly. A solid sheet may be placed over the grid to close it.

Abstract: A portable plastic resin restroom has an expanded interior space while maintaining a footprint with a standard depth dimension facilitating transport of the structure with conventional equipment. The depth dimension corresponds to that of conventional “utility” sized portable restrooms, and increased interior space is achieved by providing a width dimension half again as big. Its base has two or more runners, at least two of which are spaced at another industry standard dimension for transport equipment used to haul utility sized structures.

Abstract: A holding tank for a portable restroom comprised of two parts, a top portion and a bottom portion, is provided. The top portion fits on the bottom portion to enclose an interior of the tank, and the top portion defines a toilet opening. The top portion preferably fits to the bottom portion with a tongue-and-groove joint. The holding tank may include additional features, such as barbs included between the top portion and the bottom portion that hold the top portion to the bottom portion. In addition, the holding tank may include a toilet bowl in the toilet opening, and the toilet bowl may be flushed by water from an internal or external fresh water vessel.

Abstract: A molded plastic skid base for a resin building is formed with all of its openings facing downward and with runners integral with a deck that forms a floor of the base. Replaceable wear plates cover the bottoms of the runners and have truck loading notches molded at their ends and a longitudinal channel in which fastener heads are positioned. Stake down slots are provided in the ends of the runners and wear plates in a diagonal orientation so as to be aligned toward the center of the building, below the base. The floor of the base is a grid formed of diagonally oriented ribs, at least some of which may be shorter in their center than at their ends, is crowned in the center and has openings which taper upwardly. A solid sheet may be placed over the grid to close it.

Abstract: A cab for a vehicle, such as an all terrain vehicle, a tractor, or small construction vehicle, is constructed of twin-sheet plastic panels that can be easily assembled, preferably with snap-together interlocking features. One of the panels can be a door panel having a door hinged to a door frame to control passage through a doorway. Both the door and the door frame have spaced apart hinge knuckles that interleave along a hinge axis to allow the door to pivot about a hinge pin. The door and door frame can be molded in a single twin-sheet panel. The two walls of the panel are fused together along the outer periphery of the panel door portion and the inner periphery of the panel door frame portion. The door is separated from the door frame by cutting the each of the walls along a door perimeter between the door and door frame portions of the molded panel.

Abstract: A multi-use building structure has a base, roof and four wall panels, one of which provides a doorway. The wall panels are assembled to the base by a tab and slot connection and the wall panels are connected together with lengthwise corner connectors engaging the edges of the wall panels at both interior and exterior surfaces. A liner insert having a non-porous inner surface covers the inner surfaces of the wall panels. The liner insert is sized to completely cover the wall panels, however, it can be formed or trimmed to fit around various elements of or mounted to the wall panels. The liner insert can include relief grooves at bend regions corresponding to the corners of the structure. The edges of the liner insert engage either the corner connectors or catch surfaces of the wall panels.

Abstract: A molded plastic skid base for a resin building is formed with all of its openings facing downward and with runners integral with a deck that forms a floor of the base. Replaceable wear plates cover the bottoms of the runners and have truck loading notches molded at their ends and a longitudinal channel in which fastener heads are positioned. Stake down slots are provided in the ends of the runners and wear plates in a diagonal orientation so as to be aligned toward the center of the building, below the base. The floor of the base is a grid formed of diagonally oriented ribs, at least some of which may be shorter in their center than at their ends, is crowned in the center and has openings which taper upwardly. A solid sheet may be placed over the grid to close it.

Abstract: A multi-use building structure has a base, roof and four wall panels, one of which provides a doorway. The wall panels are assembled to the base by a tab and slot connection and the wall panels are connected together with lengthwise corner connectors engaging the edges of the wall panels at both interior and exterior surfaces. A liner insert having a non-porous inner surface covers the inner surfaces of the wall panels. The liner insert is sized to completely cover the wall panels, however, it can be formed or trimmed to fit around various elements of or mounted to the wall panels. The liner insert can include relief grooves at bend regions corresponding to the corners of the structure. The edges of the liner insert engage either the corner connectors or catch surfaces of the wall panels.

Abstract: Disclosed herein is a multi-use building structure and method of assembling same. The building has its major components preferably made of twin sheets of plastic resin, each sheet formed to define different inner and outer surfaces. The building includes unique fasteners and connections facilitating quick and easy assembly for use and disassembly for shipping. The building may be used for different purposes with simple modifications, including a portable toilet, ticket booth, shelter, and storage shed.

Abstract: A plastic resin hutch has rigid ends spanned by a flexible cover disposed in grooves along the inside perimeter of the rigid ends. In one embodiment, the flexible cover is supported by metal rods attached to the rigid ends. In another embodiment, the cover is supported at the top by a channel and at the bottom by a radius both formed by flexing the cover along longitudinal kerf grooves on one side of the cover. The rigid ends are formed by a twin-sheet vacuum thermo-forming, blow molding or roto-molding process so as to include a door panel. The door panel includes a door that is partially cut free from the door panel so as to be integrally hinged to the door panel. The resin hutch may be transported in two shipping packages within the weight and size restrictions of common commercial couriers.