How I Want My Crutch Tripod Leg To Close

Inside a grabber/ gripper -
The handle and grabber parts are made from cast aluminium parts. A cable ribs through the aluminium shaft to prevent snagging the pile during use. The grabber end is fitted with a piece of rubber tubing.

Once the handle is pressed it pulls the trigger back in which pill the elasticated wire which enabled the bottom plastic end to pull and close. This allows the user to pick things up. Once the handle is released the wore snaps back into position.

Umbrella mechanism-

To understand how an umbrella opens and closes, it is necessary to understand its construction. Any umbrella, from huge patio versions to the little emergency umbrellas small enough to fit into a purse, work on the same principle. Waterproof material is stretched over a circular fan of springy metal ribs that attach at the top of the umbrella shaft. These, in turn, are supported by metal stretchers attached to a runner that slides up and down the central shaft. Without the stretchers, the umbrella would not work.

• The Runner

  While each part of the umbrella is necessary for its operation, the runner is the part that opens and closes it. When the runner is all the way down, the stretchers are folded flat against the shaft and the umbrella is "closed," with the waterproof material and the rwrapped around the shaft. To open the umbrella, the user slides the runner all the way to the top. The stretchers extend, raising the ribs to which they are attached and spreadithmaterial tight over the ribs.
  
  
  
  
  
  
  
  
  
  
  
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The pop up umbrella works because there is a middle ring connecting to the ribs. When you push down on the ring of the umbrella pops out into a protection cover. The original umbrella worked because the ribs are connected to the middle part of the bre lola and it slides up and down which opens and closed it.

The runner is the part that opens and closed it when the runner is all the way down the stretcher are folded flat against the shaft and the umbrella is closed with the waterproof material and the ribs wrappers around the shaft. To open the umbrella, the user slides the runner all the way to the top. The stretchers extend raiding the ribs to which they are attached and spreading the material tight over the ribs.

• The Runner

  While each part of the umbrella is necessary for its operation, the runner is the part that opens and closes it. When the runner is all the way down, the stretchers are folded flat against the shaft and the umbrella is "closed," with the waterproof material and the ribs wrapped around the shaft. To open the umbrella, the user slides the runner all the way to the top. The stretchers extend, raising the ribs to which they are attached and spreading the 

  material tight over the ribs.

  
  

  
  

  
  

  
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