Abstract: A spa cover lifter for moving a spa cover from a closed position to a storage position includes a drive mechanism, a fixed base and a lifting arm assembly. The lifting arm assembly is mounted to first or second leaves of the spa cover. The lifting arm assembly is driven by the drive mechanism and is moveably mounted to the fixed base. The lifting arm assembly includes a cover pivoting assembly and a cover transporting assembly. The cover pivoting assembly is driven by the drive mechanism to move the cover from the closed position to an intermediate position and the cover transporting assembly is driven by the drive mechanism to the move the cover from the intermediate position to the storage position. The spa cover lifter has an automatic shutoff for cutting power when an obstacle is encountered. A method of moving the spa cover is also disclosed.

Abstract: A spa cover lifter for moving a spa cover from a closed position to a storage position includes a drive mechanism, a fixed base and a lifting arm assembly. The lifting arm assembly is mounted to first or second leaves of the spa cover. The lifting arm assembly is driven by the drive mechanism and is moveably mounted to the fixed base. The lifting arm assembly includes a cover pivoting assembly and a cover transporting assembly. The cover pivoting assembly is driven by the drive mechanism to move the cover from the closed position to an intermediate position and the cover transporting assembly is driven by the drive mechanism to the move the cover from the intermediate position to the storage position. The spa cover lifter has an automatic shutoff for cutting power when an obstacle is encountered. A method of moving the spa cover is also disclosed.

Abstract: Portable medical oxygen concentrator comprising an air separation system adapted to recover oxygen from air; a bottom platform and a shell having an outer wall, wherein the shell is detachably connected to the bottom platform, wherein the shell and bottom platform define an enclosed volume when the shell is connected to the bottom platform, and wherein the air separation system is disposed in the enclosed volume; and one or more rechargeable batteries detachably connected to the outer wall of the shell and adapted to provide power to drive the air separation system. The air separation system may comprises a pressure swing adsorption system having two or more adsorbent columns and a rotary valve for directing gas flow sequentially to, from, and among the columns. A base assembly attached to the bottom platform may be adapted to support the two or more adsorbent columns and the rotary valve.

Abstract: A photovoltaic roofing tile for installing on a roof surface and converting solar energy into electrical energy includes a tile base that has a first side surface, a second side surface and a top edge. A rigid contact support extends outwardly from the top edge of the tile base and is generally parallel with the first side surface of the tile base. A plurality of electrically interconnected photovoltaic cells are arranged on the first side surface of the tile base and forming of a photovoltaic circuit that has first and second terminal ends. A contact tab extends from the top edge of the tile base and along the contact support to form a male connector. The contact tab includes the first and second terminal ends, the first and second terminal ends being at least partially exposed on an outer surface of the male connector.

Abstract: A method of manufacturing a photovoltaic roofing tile for installing on a roof surface and converting solar energy into electrical energy includes the steps of forming a generally flexible photovoltaic laminate, the laminate including a photovoltaic layer including plurality of electrically interconnected photovoltaic cells and a photovoltaic circuit electrically connecting the photovoltaic cells, inserting the laminate into a tile mold and injecting a molten thermoplastic material into the tile mold to form and fixedly attached a tile base to the laminate.

Abstract: An integrated solar roofing tile connection system for installing on a roof surface for converting solar energy into electrical energy includes a plurality of battens that each have a length and are mounted to the roof surface. The plurality of battens are generally parallel to and spaced from one another. A plurality of electrically connected female connectors mounted to each batten and spaced along the length of each batten. A plurality of photovoltaic roofing tiles are mounted to each batten. Each photovoltaic roofing tile has a tile base that has a first side surface, a second side surface and a top edge and a photovoltaic circuit. The photovoltaic circuit includes a plurality of electrically interconnected photovoltaic cells and first and second terminal ends. Each photovoltaic roofing tile includes a male connector that extends from the tile base. Each male connector at least partially exposes the first and second terminal ends.

Abstract: An integrated solar roofing system for installation on a roof surface and for converting solar energy into electrical energy. The system comprises a first row of photovoltaic (PV) roofing tiles having a plurality of electrically interconnected PV cells. The roofing tiles comprise a first tab that extends from the tile base and has at least one mounting hole. The first tab exposes a first electrically conductive material on the first side of the first tab. The roofing tiles further comprise a second tab located on the second side of the tile base and having at least one mounting hole extending through the second tab and tile base. The second tab exposes a second electrically conductive material on the second side of the tile base. The first tab of each roofing tile in the first row is at least partially superposed over the second tab of an adjacent roofing tile aligning the mounting holes so that the roofing tiles are in electrical series communication along the first row.

Abstract: Portable medical oxygen concentrator comprising an air separation system adapted to recover oxygen from air; a bottom platform and a shell having an outer wall, wherein the shell is detachably connected to the bottom platform, wherein the shell and bottom platform define an enclosed volume when the shell is connected to the bottom platform, and wherein the air separation system is disposed in the enclosed volume; and one or more rechargeable batteries detachably connected to the outer wall of the shell and adapted to provide power to drive the air separation system. The air separation system may comprises a pressure swing adsorption system having two or more adsorbent columns and a rotary valve for directing gas flow sequentially to, from, and among the columns. A base assembly attached to the bottom platform may be adapted to support the two or more adsorbent columns and the rotary valve.

Abstract: A spa cover lifter for moving a spa cover from a closed position to a storage position includes a drive mechanism, a fixed base and a lifting arm assembly. The lifting arm assembly is mounted to first or second leaves of the spa cover. The lifting arm assembly is driven by the drive mechanism and is moveably mounted to the fixed base. The lifting arm assembly includes a cover pivoting assembly and a cover transporting assembly. The cover pivoting assembly is driven by the drive mechanism to move the cover from the closed position to an intermediate position and the cover transporting assembly is driven by the drive mechanism to the move the cover from the intermediate position to the storage position. The spa cover lifter has an automatic shutoff for cutting power when an obstacle is encountered. A method of moving the spa cover is also disclosed.