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US 8,559,104 B2Granted
Retractable projection screen
AssigneeIdeaworkx LLC
InventorRobert C. Hendricks
Life of this patent
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Abstract
A retractable projection screen having a projection screen surface, a lower batten fixed adjacent the bottom of the projection screen surface, an upper batten fixed adjacent the top of the projection screen surface, a winch mandrel, a cable adapted to be fixed to the upper batten and wound around the winch mandrel and an outer roller on which the projection screen surface is wound. An electric motor is coupled to the winch mandrel to rotate the mandrel, thereby raising and lowering the projection screen surface.
Claims20
A retractable projection screen comprising:
- a. a projection screen surface;
- b. a lower batten fixed adjacent the bottom of the projection screen surface;
- c. an upper batten fixed adjacent the top of the projection screen surface;
- d. a winch mandrel;
- e. a cable coupled to the upper batten and wound around the winch mandrel for raising and lowering the upper batten and projection screen surface in relation to the winch mandrel when the winch mandrel is rotated;
- and
- f. an outer roller having an exterior surface on which the projection screen surface may be wound, wherein the winch mandrel has a diameter that is less than the diameter of the outer roller and the winch mandrel may rotate independently from the outer roller.
4 more elements
Dependencies are inferred from the claim text.