Patent ID: 8578742
Filing Date: 2013-11-12
Classification: E05B,Y10T

Abstract:
1. An apparatus comprising a first motor; a second motor; a first band; a second band; a first housing; a first reel; a second reel; wherein the first band has a first end and a second opposing end; wherein the first end of the first band is attached to the first reel; wherein the second end of the first band is fixed to the first housing; wherein the second band has a first end and a second opposing end; wherein the first end of the second band is attached to the second reel; wherein the second end of the second band is fixed to the first housing; wherein the first band passes through a first opening and a second opening in the first housing, such that the first opening in the first housing is spaced apart from the second opening in the first housing; wherein the second band passes through a third opening and a fourth opening in the first housing, such that the third opening in the first housing is spaced apart from the fourth opening in the first housing; wherein the first band is connected to the first motor so that the first band forms a first loop; wherein the second band is connected to the second motor so that the second band forms a second loop; wherein the first motor and the second motor are fixed to the first housing; wherein the first band is connected to the first motor so that the first loop is adaptable to be varied by the first motor without varying the second loop; wherein the first motor is configured to wind at least part of the first band around the first reel when the first motor rotates the first reel in a first direction to thereby cause the first loop to be reduced in size, while the first end of the first band remains attached to the first reel and the second end of the first band remains fixed to the first housing so that if the first housing does not move, the second end of the first band does not move; wherein the first motor is configured to unwind at least part of the first band from the first reel when the first motor rotates the first reel in a second direction which is opposite the first direction, to thereby cause the first loop to be increased in size, while the first end of the first band remains attached to the first reel and the second end of the first band remains fixed to the first housing so that if the first housing does not move, the second end of the first band does not move; wherein the second band is connected to the second motor so that the second loop is adaptable to be varied by the second motor without varying the first loop; wherein the second motor is configured to wind at least part of the second band around the second reel when the second motor rotates the second reel in a third direction, to thereby cause the second loop to be reduced in size, while the first end of the second band remains attached to the second reel and the second end of the second band remains fixed to the first housing so that if the first housing does not move, the second end of the second band does not move; and wherein the second motor is configured to unwind at least part of the second band from the second reel when the second motor rotates the second reel in a fourth direction which is opposite the third direction, to thereby cause the second loop to be increased in size, while the first end of the second band remains attached to the second reel and the second end of the second band remains fixed to the first housing so that if the first housing does not move, the second end of the second band does not move.