Granted Patent
B2
US 12,226,813 · App. 18/164,826 · Granted Feb 18, 2025
Tapered structure construction
Inventors:
Eric D. Smith (Boulder, CO); Rosalind K. Takata (Denver, CO); Alexander H. Slocum (Bow, NH); Samir A. Nayfeh (Shrewsbury, MA)
Assignee:
Keystone Tower Systems, Inc.
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Abstract
Feeding stock used to form a tapered structure into a curving device such that each point on the stock undergoes rotational motion about a peak location of the tapered structure; and the stock meets a predecessor portion of stock along one or more adjacent edges.
Claims (26)
1. A device for fabricating a frusto-conical structure, the device comprising:
a drive system including two positioners and a table, each of the two positioners coupled to the table, each of the two positioners rotatably coupled to the table and rotatably coupled relative to the ground;
a curving device operable to impart curvature to a planar form of stock material; and
a control system in communication with the two positioners, the control system configured to activate the two positioners in coordination with one another to move the planar form of the stock material in a combination of translational motion and rotational motion into the curving device to form the stock material into the frusto-conical structure having a virtual peak located at a point where a taper of the frusto-conical structure being formed would decrease to zero if the frusto-conical structure were not truncated.
2. The device of claim 1 , further comprising a tension bar rotatably coupled to the table and rotatably coupled relative to the ground, wherein the tension bar biases the table against the two positioners.
3. The device of claim 1 , wherein the curving device includes a triple roll with three banks of individual rollers.
4. The device of claim 3 , wherein relative positions of the three banks of individual rollers are adjustable to control the curvature imparted by the triple roll to the planar form of the stock material.
5. The device of claim 1 , wherein the control system is further configured to control the curving device to impart the curvature to the stock material that varies linearly with height of the frusto-conical structure being formed.
6. The device of claim 1 , further comprising a joiner operable to join a first edge of the stock material to a second edge of the stock material as the stock material exits the curving device.
7. The device of claim 6 , wherein the joiner includes a welder.
8. A device for fabricating a frusto-conical structure, the device comprising:
a drive system including a roller;
a positioner coupled to the drive system, the positioner rotatably coupled to the drive system and rotatably coupled relative to a stationary point;
a curving device operable to impart curvature to a planar form of stock material; and
a control system in communication with the roller and the positioner, the control system configured to activate the roller and the positioner in coordination with one another to move the planar form of the stock material in a combination of translational motion and rotational motion into the curving device to form the stock material into the frusto-conical structure having a virtual peak located at a point where a taper of the frusto-conical structure being formed would decrease to zero if the frusto-conical structure were not truncated.
9. The device of claim 8 , wherein the control system is further configured to control the curving device to impart the curvature to the stock material that varies linearly with height of the frusto-conical structure being formed.
10. The device of claim 8 , further comprising a joiner operable to join a first edge of the stock material to a second edge of the stock material as the stock material exits the curving device.
11. The device of claim 10 , wherein the joiner includes a welder.
12. The device of claim 8 , wherein the drive system includes a wheel.
13. A device for fabricating a frusto-conical structure, the device comprising:
a drive system including a plurality of pickers, a plurality of rails, and tracks, each of the plurality of pickers slidably mounted on a respective one of the plurality of rails, and each rail slidably mounted on the tracks;
a curving device operable to impart curvature to a planar form of stock material; and
a control system in communication with the plurality of pickers, the control system configured to activate the plurality of pickers to move the plurality of pickers in coordination with one another to rotate the planar form of the stock material into the curving device about a virtual peak located at a point where a taper of the frusto-conical structure being formed would decrease to zero if the frusto-conical structure were not truncated, and the control system is further configured to control the plurality of pickers into engagement with a plurality of points of the planar form of the stock material.
14. The device of claim 13 , wherein the control system is further configured to control the curving device to impart the curvature to the stock material that varies linearly with height of the frusto-conical structure being formed.
15. The device of claim 13 , further comprising a joiner operable to join a first edge of the stock material to a second edge of the stock material as the stock material exits the curving device.
16. The device of claim 15 , wherein the joiner includes a welder.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Jun 26, 2024
From: SMITH, ERIC D.; SLOCUM, ALEXANDER H.; TAKATA, ROSALIND K.; NAYFEH, SAMIR A.
To: KEYSTONE TOWER SYSTEMS, INC.
Reel/Frame 067850/0086 →
Continuity (6)
Provisional Application
61537013
· Sep 20, 2011
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