ROLLNLOCK is the multipurpose device CLIMBING TECHNOLOGY dedicates to mountaineering, rope access work and self-rescue. Compact, ultralight and easy to handle, it offers three different modes of ...

Long passed are the days of manila rope and wooden block and tackles. Now, we puff out our chest with high-efficiency, ball bearing pulleys and auto-locking carabiners. Much like cellphones, it seems ...

Swiftwater environments are dynamic situations. As a whitewater river guide, the only tools that I have available to me are what are on my person or in my boat. However, every rescuer must have the ...

Introduction Before the industrial age people largely had to rely on muscle power to move and lift heavy objects. Simple machines such as pulleys, levers and ramps made it easier for humans to lift ...

Pulley systems are simple machines that make lifting heavy objects easier. They consist of a rope or cable that passes over one or more wheels (pulleys). A single pulley changes the direction of force ...

A gear close gearA gear is a mechanical part with teeth that interlock with another gear or belt to transfer motion and power while changing speed, or direction in a mechanical system. is a special ...