Opposed-rope hoist driven telescoping mast
First Claim
1. An opposed-rope driven telescoping mast assembly comprising:
- a stationary support;
a longitudinal mast comprising a longitudinal section joined to move relative to the stationary support;
a drive assembly having a weight that counterbalances at least a portion of the weight of the longitudinal section, the drive assembly comprising;
a frame pivotally joined to the stationary support;
a rotatable drum assembly mounted to the frame; and
a first rope and a second rope, the first rope being joined to the drum assembly and to the longitudinal mast to pull the longitudinal section in a first direction, the second rope joined to the drum assembly and to the longitudinal mast to pull the longitudinal section in a second direction;
a sensor operably coupled to the drive assembly to sense overload tension in the first rope or the second rope by movement of the drive assembly; and
a spring joined to the drive assembly to support at least a portion of the weight of the longitudinal section.
6 Assignments
0 Petitions
Accused Products
Abstract
An opposed-rope driven telescoping mast assembly includes a stationary support and a longitudinal mast comprising a longitudinal section joined to move relative to the stationary support. A drive assembly drives the longitudinal mast and includes a frame and a rotatable drum assembly mounted to the frame. A first rope is joined to the drum assembly and to the longitudinal mast to pull the longitudinal section in a first direction, while a second rope is joined to the drum assembly and to the longitudinal mast to pull the longitudinal section in a second direction. A sensor is operably coupled to the drive assembly to sense overload tension in the first rope or the second rope.
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Citations
21 Claims
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1. An opposed-rope driven telescoping mast assembly comprising:
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a stationary support; a longitudinal mast comprising a longitudinal section joined to move relative to the stationary support; a drive assembly having a weight that counterbalances at least a portion of the weight of the longitudinal section, the drive assembly comprising; a frame pivotally joined to the stationary support; a rotatable drum assembly mounted to the frame; and a first rope and a second rope, the first rope being joined to the drum assembly and to the longitudinal mast to pull the longitudinal section in a first direction, the second rope joined to the drum assembly and to the longitudinal mast to pull the longitudinal section in a second direction; a sensor operably coupled to the drive assembly to sense overload tension in the first rope or the second rope by movement of the drive assembly; and a spring joined to the drive assembly to support at least a portion of the weight of the longitudinal section. - View Dependent Claims (2, 3, 4)
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5. An opposed-rope driven telescoping mast assembly comprising:
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a stationary support; a longitudinal mast comprising a longitudinal section joined to move relative to the stationary support; a drive assembly having a weight that counterbalances at least a portion of the weight of the longitudinal section, the drive assembly comprising; a frame pivotally joined to the stationary support; a rotatable drum assembly mounted to the frame; and a first rope and a second rope, the first rope being joined to the drum assembly and to the longitudinal mast to pull the longitudinal section in a first direction, the second rope joined to the drum assembly and to the longitudinal mast to pull the longitudinal section in a second direction; a sensor operably coupled to the drive assembly to sense overload tension in the first rope or the second rope by movement of the drive assembly; and an actuator device joined to the drive assembly to support at least a portion of the weight of the longitudinal section. - View Dependent Claims (6, 7, 8)
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9. An opposed-rope driven telescoping mast assembly comprising:
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a stationary support; a first longitudinal section joined to move relative to the stationary support; a second longitudinal section joined to move relative to the first longitudinal section; a drive assembly comprising; a drum assembly having a first drum and a second drum; a first rope and a second rope, the first rope being joined to the first drum for winding thereon and to the first longitudinal section, the second rope joined to the second drum for winding thereon in a direction opposite to the first rope and to the second longitudinal section; a pulley mounted to the first longitudinal section; and a third rope joined to the second longitudinal section and the stationary support, the third rope being guided on the pulley. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An opposed-rope driven telescoping mast assembly comprising:
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a stationary support; a first longitudinal section joined to move relative to the stationary support; a second longitudinal section joined to move relative to the first longitudinal section; and a drive assembly comprising; a drum assembly having a first drum and a second drum; and a first rope and a second rope, the first rope being joined to the first drum for winding thereon and to the first longitudinal section, the second rope joined to the second drum for winding thereon in a direction opposite to the first rope and to the second longitudinal section, wherein the drive assembly is configured to maintain tension on the first rope and the second during extension and retraction of the sections limiting backlash movement of the sections relative to each other. - View Dependent Claims (18, 19, 20, 21)
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Specification