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US 6,668,679 B2Granted
Apparatus and method for pulley actuator
AssigneeL&P Property Management Company
InventorRobert McMillen
Life of this patent
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Abstract
A tensioning cable actuator has a housing with a nut held in the housing. The nut has threads which engage a lead screw that has corresponding threads. A pulley cradle is fixed to the lead screw. The pulley cradle is disposed within the housing to translate axially with the lead screw upon rotation of the nut. A pulley is disposed in the pulley cradle. A Bowden cable wire wraps around the pulley and is anchored to the housing so that the wire moves into or out of the Bowden cable sleeve twice far as the lead screw moves.
Claims16
A tensioning cable actuator comprising:
- a housing having an axis;
- a nut, said nut being rotationally engaged with said housing such that said nut does not translate axially when rotated, said nut having internal threads;
- a lead screw having external threads, said external threads being engaged with said internal threads of said nut such that said lead screw translates axially when said nut is rotated;
- a pulley cradle fixed to said lead screw;
- a pulley disposed within said pulley cradle;
- and
- a wire seat in said housing, said wire seat being disposed to receive a wire from the tensioning cable in a position such that the wire from the tensioning cable is operatively engaged with said pulley.
4 more elements
Dependencies are inferred from the claim text.