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Controlled Spring Like Mechanism

  1. Dec 31, 2011 #1
    I have a need for a mechanism that acts juust like a spring (I pull, load it up, and when i let go it pulls away and returns to its normal length), but doesnt snap back like a spring.

    I have experiemented with automatic door closers, but they are definatly not the answer (require too much force to pull, take too much space, too long)

    Is there already a mechanism? Should i just use springs in parallel with a device like a pneumatic cylinder to control the return action? Idealy the system will only require a human to apply ~10lbs of force, and the spring/mechanism will expand ~5-10 inches, and when released, will contract with similar amount of force required to load the device
     
  2. jcsd
  3. Dec 31, 2011 #2
    What is the application?
     
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