Abstract: A feeder door of a feeder of a machine gun, the feeder including a feeder housing and the feeder door spring-loaded and pivotally coupled via a pivotal coupling to the feeder housing between at least an open position and a closed position, the feeder door comprising a base including a slot; a retainer lever; and a pivotal coupling independent of the feeder door and feeder housing pivotal coupling configured to spring-load and pivotally couple the retainer lever to the feeder housing between at least a stowed position with the retainer lever retracted in the slot of the base of the feeder door and a deployed position with the deployable portion extending outwardly from the slot of the base feeder door.

Abstract: A headwear article that converts between a headwear configuration and a mask configuration. The headwear article has a crown for covering at least a portion of a head of a wearer, a visor attached to a front portion of the crown, and at least one mask support element coupled to the crown. From the headwear configuration, at least a portion of the rear portion of the crown is collapsible into the front portion of the crown to position the headwear in the mask configuration. In the mask configuration, the at least one mask support element is configured to secure the headwear over a portion of a face of the wearer.

Abstract: A modular crossover system includes one or more platforms, one or more platform guardrails attached to the platform, a plurality of towers supporting the one or more platforms, a plurality of stile assemblies attached to the platforms, or a combination of towers and stile assemblies. An optional fixed ladder may be attached to one of the platforms.

Abstract: A headwear article that converts between a headwear configuration and a mask configuration. The headwear article has a crown for covering at least a portion of a head of a wearer, a visor attached to a front portion of the crown, and at least one mask support element coupled to the crown. From the headwear configuration, at least a portion of the rear portion of the crown is collapsible into the front portion of the crown to position the headwear in the mask configuration. In the mask configuration, the at least one mask support element is configured to secure the headwear over a portion of a face of the wearer.

Abstract: A headwear article that converts between a headwear configuration and a mask configuration. The headwear article has a crown for covering at least a portion of a head of a wearer, a visor attached to a front portion of the crown, and at least one mask support element coupled to the crown. From the headwear configuration, at least a portion of the rear portion of the crown is collapsible into the front portion of the crown to position the headwear in the mask configuration. In the mask configuration, the at least one mask support element is configured to secure the headwear over a portion of a face of the wearer.

Abstract: A collapsible power generator (e.g., a fuel cell) isolating envelope for managing airflow in and out of a fuel cell, while providing thermal and electrical insulation between said fuel cell and the interior of a power plant enclosure. In a preferred embodiment, the collapsible fuel cell isolator is formed from a flat material into a parallelogram, allowing easy installation into the interior of said enclosure. Once the collapsible fuel cell isolating envelope is inside the enclosure, the collapsible fuel cell isolator may be opened up to a final rectangular form, and mounted in place such that a fuel cell may then be placed into the interior of the collapsible fuel cell isolating envelope. The collapsible nature of the fuel cell isolator allows the isolator to maximize the interior volume of the enclosure.

Abstract: A virtual health-care electronic commerce community includes a network to communicate information relating to the community; one or more patients coupled to the network; one or more treating professionals coupled to the network; and a server coupled to the network, the server storing data for each patient and performing patient data visualization in response to a user request.

Abstract: A high-throughput system for processing biological material that comprises: a tray that supports a functionally-closed fluid path subsystem comprising, a vessel for containing and enabling the biological material to separate into two or more distinct submaterials; one or more receptacles to receive one or more of the submaterials from the vessel; a filtration device; a conduit through which one or more submaterials are transported between at least the vessel and the filtration device; and a first engagement structure; a processing unit comprising, a pumping device for moving one or more of the submaterials between at least the vessel and the filtration device via the conduit; a second engagement structure corresponding to the first engagement structure; a locking mechanism for at least temporarily holding the tray in a fixed position relative to the processing unit; a control device that automatically starts and stops the pumping device in response to one or more commands.

Abstract: A collapsible power generator (e.g., a fuel cell) isolating envelope for managing airflow in and out of a fuel cell, while providing thermal and electrical insulation between said fuel cell and the interior of a power plant enclosure. In a preferred embodiment, the collapsible fuel cell isolator is formed from a flat material into a parallelogram, allowing easy installation into the interior of said enclosure. Once the collapsible fuel cell isolating envelope is inside the enclosure, the collapsible fuel cell isolator may be opened up to a final rectangular form, and mounted in place such that a fuel cell may then be placed into the interior of the collapsible fuel cell isolating envelope. The collapsible nature of the fuel cell isolator allows the isolator to maximize the interior volume of the enclosure.

Abstract: A composite airfoil includes a core that has a three-dimensional network of fibers. The core defines an airfoil section and a root section. A composite skin covers a portion of the core excluding the root section.

Abstract: A computer is used to create a plan for repositioning an orthodontic patient's teeth. The computer receives an initial digital data set representing the patient's teeth at their initial positions and a final digital data set representing the teeth at their final positions. The computer then uses the data sets to generate treatment paths along which the teeth will move from the initial positions to the final positions.

Abstract: A computer is used to create a plan for repositioning an orthodontic patient's teeth. The computer receives an initial digital data set representing the patient's teeth at their initial positions and a final digital data set representing the teeth at their final positions. The computer then uses the data sets to generate treatment paths along which the teeth will move from the initial positions to the final positions.

Abstract: A high-throughput system for processing biological material that comprises: a tray that supports a functionally-closed fluid path subsystem comprising, a vessel for containing and enabling the biological material to separate into two or more distinct submaterials; one or more receptacles to receive one or more of the submaterials from the vessel; a filtration device; a conduit through which one or more submaterials are transported between at least the vessel and the filtration device; and a first engagement structure; a processing unit comprising, a pumping device for moving one or more of the submaterials between at least the vessel and the filtration device via the conduit; a second engagement structure corresponding to the first engagement structure; a locking mechanism for at least temporarily holding the tray in a fixed position relative to the processing unit; a control device that automatically starts and stops the pumping device in response to one or more commands.

Abstract: A high-throughput system for processing biological material that comprises: a tray that supports a functionally-closed fluid path subsystem comprising, a vessel for containing and enabling the biological material to separate into two or more distinct submaterials; one or more receptacles to receive one or more of the submaterials from the vessel; a filtration device; a conduit through which one or more submaterials are transported between at least the vessel and the filtration device; and a first engagement structure; a processing unit comprising, a pumping device for moving one or more of the submaterials between at least the vessel and the filtration device via the conduit; a second engagement structure corresponding to the first engagement structure; a locking mechanism for at least temporarily holding the tray in a fixed position relative to the processing unit; a control device that automatically starts and stops the pumping device in response to one or more commands.

Abstract: A gas turbine engine fan assembly includes a rotor disk, a fan blade and a spacer. The rotor disk includes a longitudinally extending slot with a first spacer contact surface. The fan blade includes a root with a second spacer contact surface arranged within the slot. The spacer includes a leaf spring backbone and a compliant member. The leaf spring backbone includes one or more root contact segments connected longitudinally to one or more slot contact segments. A first of the root contact segments contacts the second spacer contact surface, and a first of the slot contact segments contacts the first spacer contact surface. The compliant member is radially between the first spacer contact surface and the first root contact segment, and radially between the second spacer contact surface and the first slot contact segment.

Abstract: A computer is used to create a plan for repositioning an orthodontic patient's teeth. The computer receives an initial digital data set representing the patient's teeth at their initial positions and a final digital data set representing the teeth at their final positions. The computer then uses the data sets to generate treatment paths along which teeth will move from the initial positions to the final positions.

Abstract: A computer is used to create a plan for repositioning an orthodontic patient's teeth. The computer receives an initial digital data set representing the patient's teeth at their initial positions and a final digital data set representing the teeth at their final positions. The computer then uses the data sets to generate treatment paths along which teeth will move from the initial positions to the final positions.