Steerable, follow the leader device

Patent metadata

Field	Value
Publication number	US-2016174816-A1
Application number	US-201514642023-A
Country	US
Kind code	A1
Filing date	Mar 9, 2015
Priority date	Jun 25, 2004
Publication date	Jun 23, 2016
Grant date	—

Abstract

A highly articulated robotic probe (HARP) is comprised of a first mechanism and a second mechanism, one or both of which can be steered in desired directions. Each mechanism can alternate between being rigid and limp. In limp mode the mechanism is highly flexible. When one mechanism is limp, the other is rigid. The limp mechanism is then pushed or pulled along the rigid mechanism. The limp mechanism is made rigid, thereby assuming the shape of the rigid mechanism. The rigid mechanism is made limp and the process repeats. These innovations allow the device to drive anywhere in three dimensions. The device can “remember” its previous configurations, and can go anywhere in a body or other structure (e.g. jet engine). When used in medical applications, once the device arrives at a desired location, the inner core mechanism can be removed and another functional device such as a scalpel, clamp or other tool slid through the rigid sleeve to perform. Because of the rules governing abstracts, this abstract should not be used to construe the claims.

First claim

1 .- 41 . (canceled)

42 . A system comprising:
a highly articulated robotic probe comprising:
a first mechanism comprising a plurality of first links, and
a second mechanism comprising a plurality of second links, wherein the second mechanism is configured to surround at least a portion of the first mechanism;
a feeder mechanism configured to advance and retract the highly articulated robotic probe; and a computing device in communication with the feeder mechanism, wherein the computing device is configured to:
receive two-axis data from an input device,
translate the two-axis position data into three-axis coordinate system data, and
adjust a position of one or more second mechanism motors based on the three-axis coordinate system data.

43 . The system of claim 1 , wherein the feeder mechanism comprises:
a first movable cart comprising a first actuator that is configured to control movement of the first movable cart; one or more first mechanism motors, wherein the first movable cart is configured to carry the one or more first mechanism motors; and a second movable cart comprising a second actuator that is configured to control movement of the second movable cart; wherein the second movable cart is configured to carry the one or more second mechanism motors, wherein the first and second actuators are optionally linear actuators.

44 . The system of claim 43 , wherein the computing device is further configured to:
receive an instruction from an input device to lock a position of the second mechanism; instruct the feeder mechanism to drive the one or more second mechanism motors in a direction opposite a pull of one or more tension wires associated with the second mechanism; and instruct the feeder mechanism to drive the one or more first mechanism motors in a direction of a pull of one or more tension wires associated with the first mechanism.

45 . The system of claim 43 , wherein:
the one or more first mechanism motors are configured to:
advance the first mechanism a distance equal to approximately a length of one of the plurality of first links, and
lock a position of the first mechanism; and
the one or more second mechanism motors are configured to:
advance the second mechanism a distance equal to approximately a length of one of the plurality of second links, and
lock a position of the second mechanism.

46 . The system of claim 42 , wherein one or more of the plurality of first links comprises a cylindrically-shaped link comprising a first end and a second end, wherein the first end comprises a convex shape, wherein the second end comprises a concave shape.

47 . The system of claim 42 , wherein one or more of the plurality of second links comprises a cylindrically-shaped link comprising a first end and a second end, wherein the first end comprises a convex shape, wherein the second end comprises a concave shape.

48 . The system of claim 42 , further comprising a first tensioning wire, a second tensioning wire, and a third tensioning wire, wherein each of the second links comprises:
a first channel configured to surround at least a portion of the first tensioning wire; a second channel configured to surround at least a portion of the second tensioning wire; and a third channel configured to surround at least a portion of the third tensioning wire.

49 . The system of claim 48 , further comprising a first motor, a second motor and a third motor, wherein the first motor is configured to control a tension of the first tensioning wire, wherein the second motor is configured to control a tension of the second tensioning wire, wherein the third motor is configured to control a tension of the third tensioning wire.

50 . The system of claim 48 , wherein the first channel, the second channel and the third channel are located approximately 120 degrees apart from one another.

51 . The system of claim 42 , further comprising a first tensioning wire, a second tensioning wire, and a third tensioning wire, wherein each of the first links comprises:
a first channel configured to surround at least a portion of the first tensioning wire; a second channel configured to surround at least a portion of the second tensioning wire; and a third channel configured to surround at least a portion of the third tensioning wire.

52 . The system of claim 51 , further comprising a first motor, a second motor and a third motor, wherein the first motor is configured to control a tension of the first tensioning wire, wherein the second motor is configured to control a tension of the second tensioning wire, wherein the third motor is configured to control a tension of the third tensioning wire.

53 . The system of claim 51 , wherein the first channel, the second channel and the third channel are located approximately 120 degrees apart from one another.

Assignees

• Univ Carnegie Mellon
• Univ Pittsburgh

Inventors

• Choset Howard M
• Wolf Alon
• Zenati Marco A

Classifications

• A61B2090/392

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• A61B2090/3614

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• A61B2034/2059

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• A61B2034/306

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• A61B1/0055 Primary

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