Abstract: A system and method for monitoring one or more environmental conditions at a construction Site. Some embodiments include a system and method for sending a notification to a client device based on a trigger condition. The system may include a computer server including a web server and a database; a Coordinator and Aggregator Gateway (CAG) deployed at the construction site and In communication with the web server and a global position system (GPS) network; and one or more Wireless Sensor Nodes (WSNs) deployed at the construction site and in communication with the CAG, each of the WSNs including one or more sensors configured to measure an environmental condition of the construction site.

Abstract: A fuel tank for receiving a fluid in a motor vehicle. The fuel tank includes an outer wall forming an internal space for receiving the fluid. At least one volume element is arranged in the internal space for receiving air, and an opening that is a gas-guiding line between the volume element and the environment of the tank is for changing the volume of the volume element. The at least one volume element is formed at least partially as bellows.

Abstract: A system and method for monitoring one or more environmental conditions at a construction site. Some embodiments include a system and method for sending a notification to a client device based on a trigger condition. The system may comprise a computer server comprising a web server and a database; a Coordinator and Aggregator Gateway (CAG) deployed at the construction site and in communication with the web server and a global position system (GPS) network; and one or more Wireless Sensor Nodes (WSNs) deployed at the construction site and in communication with the CAG, each of the WSNs comprising one or more sensors configured to measure an environmental condition of the construction site.

Abstract: A powered rope ascender that supports a person or a load while ascending a vertical rope. The rope ascender has a motor driven capstan drum that engages the rope. A pinch roller grips the rope against the capstan drum. A load limiting assembly releases the grip by the pinch roller when the load supported by the ascender exceeds a predetermined amount. A centrifugal clutch reduces starting torque required by the motor and the outer drum of the centrifugal clutch interacts with a brake to hold position on the rope. For heavy loads a motion activated brake is used. Hand controls provide a freewheeling, a braking and an ascending mode of operation. A harmonic drive or planetary reduction gears provide speed reduction from the motor to the capstan drum. The powered rope ascender can be threaded on the rope without access to a rope end.

Abstract: A powered rope ascender that supports a person or a load while ascending a vertical rope. The rope ascender has a motor driven capstan drum that engages the rope. A pinch roller grips the rope against the capstan drum. A load limiting assembly releases the grip by the pinch roller when the load supported by the ascender exceeds a predetermined amount. A centrifugal clutch reduces starting torque required by the motor and the outer drum of the centrifugal clutch interacts with a brake to hold position on the rope. For heavy loads a motion activated brake is used. Hand controls provide a freewheeling, a braking and an ascending mode of operation. A harmonic drive or planetary reduction gears provide speed reduction from the motor to the capstan drum. The powered rope ascender can be threaded on the rope without access to a rope end.