But what if we could develop a constant-torque spring-balanced actuator which didn't require more and more force the more the spring stretches?

The MGM Brakes LTR-L3 3" Long Stroke series spring brake actuators have a double-diaphragm design for an increased reserve stroke, helping to reduce out-of-adjustment ...

Most experiments in flexible robot actuators are based around pneumatics, but [Ayato Kanada] and [Tomoaki Mashimo] has been working on using a coiled spring as the moving component of a linear actu… ...

Cowan Dynamics, a leading provider of actuation and process control solutions for industrial and manufacturing clients worldwide, launches its AS Series spring return pneumatic valve actuator.