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HYDRAULIC CYLINDER CONTROL

  • US 20130097931A1
  • Filed: 12/10/2012
  • Published: 04/25/2013
  • Est. Priority Date: 02/02/2010
  • Status: Active Grant
First Claim
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1. A method for operating a single piece garage door, comprising:

  • operating motion of the door in a first slow zone, an acceleration zone, a full-speed zone, a deceleration zone, and a second slow zone, respectively, for movement of the door from a first position to a second position, wherein motion of the door is effected by a pair of hydraulic cylinders controlled to move the door at the first speed, a second speed, and a full speed, and to ramp the speed from the first speed to the full speed, from the full speed to the second speed, from the second speed to the full speed, and from the full speed to the first speed depending upon a direction the door is being moved.

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