Hydraulic cylinder control
AssigneeHi-Fold Door Corporation
InventorsRichard D. Keller, Damian Keller, Daniel Keller, William Bakalich, Steven Schultz, Fred W. Sauer, Jaron R. McDaniel
Life of this patent
Estimating the term…
Abstract
A system and methods for controlling operation of hydraulic cylinders includes monitoring position of the cylinders relative to one another, and correction of misalignment of the cylinders should they become misaligned. Further, monitoring can be of a swing-type door operated using the cylinders, which can operate the door at different speeds. Further, as the door creeps open from a closed position or closed from an open position, correction is also made.
Claims12
A method for opening a single piece garage door, comprising:
- beginning motion of the door in a first slow zone at a first speed;
- increasing the speed of the door to a second speed in an acceleration zone;
- decreasing the speed of the door from the second speed to a third speed in a deceleration zone;
- and
- completing motion of the door in the second slow zone at the third speed;
- wherein opening of the door is accomplished using a pair of hydraulic cylinders;
- and
- monitoring a linear extension position of each hydraulic cylinder;
- and
- adjusting a cylinder when it is out of linear alignment with the other cylinder.
A method for opening a single piece garage door, comprising:
- beginning motion of the door in a first slow zone at a first speed;
- increasing the speed of the door to a second speed in an acceleration zone;
- decreasing the speed of the door from the second speed to a third speed in a deceleration zone;
- completing motion of the door in the second slow zone at the third speed;
- wherein opening of the door is accomplished using a pair of hydraulic cylinders, and further comprising monitoring a linear extension position of each hydraulic cylinder, and adjusting a cylinder when it is out of linear alignment with the other cylinder;
- wherein monitoring is performed using a controller to determine a linear position of each cylinder, compare the linear position of each cylinder to the other cylinder, and adjust cylinder linear position based on the relative linear position of the cylinders.
Dependencies are inferred from the claim text.