Extension Spring Lift Mechanism
An extension spring counterbalance system consists of a pair of stretched springs running parallel to the horizontal tracks. The springs lift the door through a system of pulleys and counterbalance cables running from the bottom corner brackets through the pulleys. When the door is raised, the springs contract, thus lifting the door as the tension is released.
Read more about this topic: Garage Door
Famous quotes containing the words extension, spring, lift and/or mechanism:
“We know then the existence and nature of the finite, because we also are finite and have extension. We know the existence of the infinite and are ignorant of its nature, because it has extension like us, but not limits like us. But we know neither the existence nor the nature of God, because he has neither extension nor limits.”
—Blaise Pascal (1623–1662)
“The buds swell imperceptibly, without hurry or confusion, as if the short spring days were an eternity.”
—Henry David Thoreau (1817–1862)
“Lift up your hearts, my brothers, high, higher! And don’t forget about your legs either! Lift up your legs as well, you good dancers, and better yet—stand also on your heads!”
—Friedrich Nietzsche (1844–1900)
“Life is an offensive, directed against the repetitious mechanism of the Universe.”
—Alfred North Whitehead (1861–1947)