Abstract: A method and device for warming biological samples utilizes a heater and an outer chamber fabricated from a thermal regulating material. The outer chamber includes an outer surface and an inner surface with the heater being in operative contact with at least a portion of the outer surface of the outer chamber. A biological sample receiving region defined by the inner surface of the outer chamber is included, the biological receiving region being configured to operatively accept a biological sample and, alternatively including a liquid that has a freezing point near to or below that of the biological sample, and, wherein one or more of the inner surface and the liquid is in close and intimate contact with the biological sample. The thermal regulating material may obtain and maintain a substantially constant predetermined temperature when heat is imparted to the outer chamber by the heater.

Abstract: A portable electric fastening tool operating from a power supply. The motor moves a piston which compresses air against a sealed chamber. The piston is coupled to a fastener impacting anvil and is released after sufficient energy is stored in the air chamber. The air energetically expands pushing the piston and fastener driving anvil into the substrate. The actuation is governed by a control circuit and initiated from a trigger switch. The stored energy delivered from the motor is coupled to the output anvil and drives the nail. At least one position of the output anvil is sensed and once the nail is driven, the power can be disconnected from the motor. This method uses a rack and a pinion to drive the piston thus reducing wear and increasing efficiency of the device. Elastic bumpers are used at the end of the stroke to limit stresses during the impact. The electrical control circuit and sensors allow precise control and improve safety. An intermediate clutch is used to increase reliability and performance.

Abstract: An air manager is disclosed which recirculates reactant air in a battery and exchanges only a minimal amount of recirculated air for ambient air that is necessary to maintain a sufficient oxygen concentration in the battery. In the air manager, the reactant air is recirculated in a defined air pathway that provides reactant air to the entire area of all the air cathodes. A catalyst element is also provided in the air manager to convert the hydrogen gas that is generated during the recharge of a metal-air battery to water vapor. The air manager is nevertheless compact and lightweight so that the resulting battery is portable.