Balanced moment lift system and method
First Claim
1. A method of changing a position of a display, comprising engaging a display and applying a force to the display, the display being operatively coupled to a lift system comprising a first pulley having an axis of rotation, a biasing member having a biasing member force dependent upon its length, a centerline, and a first portion operatively coupled to the first pulley, a first radius extending between the centerline of the biasing member and the axis of rotation, the first radius continuously changing when the first pulley rotates and the first radius having a value of zero when the biasing member force is at a maximum to create a constant moment output, and a first tension member having a first portion operatively coupled to the first pulley, the constant moment output providing a constant force to the first tension member during a defined angle of rotation of the first pulley.
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Accused Products
Abstract
A lift system having a first pulley and a biasing member having a first portion operatively coupled to the first pulley. A first tension member can be operatively coupled to the first pulley. The lift system may be configured to provide a constant force to the first tension member during a defined angle of rotation of the first pulley. Such a constant force can be used to counterbalance the weight of a display supported by a stand.
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Citations
18 Claims
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1. A method of changing a position of a display, comprising engaging a display and applying a force to the display, the display being operatively coupled to a lift system comprising a first pulley having an axis of rotation, a biasing member having a biasing member force dependent upon its length, a centerline, and a first portion operatively coupled to the first pulley, a first radius extending between the centerline of the biasing member and the axis of rotation, the first radius continuously changing when the first pulley rotates and the first radius having a value of zero when the biasing member force is at a maximum to create a constant moment output, and a first tension member having a first portion operatively coupled to the first pulley, the constant moment output providing a constant force to the first tension member during a defined angle of rotation of the first pulley.
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2. A stand and display in combination, comprising:
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a display; a stand supporting the display, the stand having a base and a vertical member coupled to the base, the vertical member having an inner member and an outer member in sliding or rolling engagement, one of the inner and outer members functionally coupled to the base and the other of the inner or outer members functionally coupled to the display; a lift system disposed within the stand, the lift system comprising a first pulley having an axis of rotation, a biasing member having a biasing member force dependent upon its length, a centerline, and a first portion operatively coupled to the first pulley, a first radius extending between the centerline of the biasing member and the axis of rotation, the first radius continuously changing when the first pulley rotates and the first radius having a value of zero when the biasing member force is at a maximum to create a constant moment output, and a first tension member having a first portion operatively coupled to the first pulley, the constant moment output providing a constant force to the first tension member during a defined angle of rotation of the first pulley to counterbalance the display. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification