Patent ID: 8800633

Claim:
In a shade system with a bracket supporting a shade storage roll, an anti-reversible power spring apparatus comprising: at least one biasing system connected with the storage roll wherein the biasing system includes a biasing member with a first end and a second end wherein the second end moves with the storage roll as the storage roll rotates and wherein the first end is held stationary with reference to the storage roll when the storage roll rotates in one direction but not when the storage roll rotates in a second direction; a support for the at least one biasing system wherein the support includes a protrusion that holds the first end against movement when the storage roll is rotated in the one direction but which allows passage of the first end over and past the protrusion when the storage roll is rotated in the second direction; and a housing slidably connected with the storage roll such that the connection permits the housing to move along a length of the storage roll while at the same time the connection secures the housing in place within the storage roll as the storage roll rotates and wherein the biasing member is in the housing.