Fluid-driven actuators and related methods

Patent metadata

Field	Value
Publication number	US-10912701-B2
Application number	US-201614990257-A
Country	US
Kind code	B2
Filing date	Jan 7, 2016
Priority date	Jan 7, 2015
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

This disclosure includes manipulating apparatuses and related methods. Some manipulating apparatuses include an actuator having a semi-rigid first segment, a semi-rigid second segment, and one or more flexible cells disposed between the first segment and the second segment, where the actuator is configured to be coupled to a fluid source such that the fluid source can communicate fluid to vary internal pressures of the one or more cells, and where each cell is configured such that adjustments of an internal pressure of the cell causes angular displacement of the second segment relative to the first segment.

First claim

The invention claimed is:

1. A manipulating apparatus comprising:
an actuator comprising:
a haptic processor;
a semi-rigid first segment;
a semi-rigid second segment; and\one or more flexible cells disposed between the first segment and the second segment, each cell having a first end and a second end;
one or more sensors configured to detect one or more physical characteristics, where at least one of the one or more sensors comprise a pressure sensor coupled to one of the segments and configured to capture data indicative of a force applied between the one of the segments and an object coupled to the one of the segments;
where the actuator is configured to be coupled to a fluid source such that the fluid source can communicate fluid to vary internal pressures of the one or more cells;
where each cell is configured such that adjustments of an internal pressure of the cell rotates the first end relative to the second end to angularly displace the second segment relative to the first segment; and
where the haptic processor is configured to receive the data indicative of the force applied between the one of the segments and the object and to communicate with the actuator to ensure that the force applied between the one of the segments and the object does not exceed a threshold.

2. The apparatus of claim 1 , where the actuator further comprises: a semi-rigid third segment; and
where the one or more flexible cells of the actuator comprise:
a first flexible cell disposed between the first segment and the second segment; and
a second flexible cell disposed between the first segment and the third segment; where the first cell is configured such that adjustments of an internal pressure of the first
cell angularly displaces the second segment relative to the first segment about a first axis; and

where the second cell is configured such that adjustments of an internal pressure of the second cell angularly displaces the third segment relative to the first segment about a second axis that is non-parallel to the first axis.

3. The manipulating apparatus of claim 2 , where the second axis is substantially perpendicular to the first axis.

4. The apparatus of claim 1 , comprising a fluid source configured to be coupled to the actuator and to vary internal pressures of the cell(s).

5. The apparatus of claim 1 , where the actuator is configured such that an internal pressure in at least one of the cells can be varied independently of an internal pressure in another one of the cells.

6. The apparatus of claim 1 , where at least one of the segments is removably coupled to at least one of the cell(s).

7. The apparatus of claim 1 , where at least one of the cell(s) is at least partially defined by a sidewall having a corrugated portion.

8. The apparatus of claim 1 , where at least one of the cell(s) is at least partially defined by a sidewall having an elastic portion.

9. The apparatus of claim 1 , where, when the first and second segments are substantially aligned with one another, the cell(s) disposed between the first and second segments extend a total length along an axis of the actuator that extends through the first and second segments that is from 10% to 90% of a length of the actuator along the axis.

10. The apparatus of claim 1 , where the actuator is configured to be coupled across a joint of a human body part.

11. The apparatus of claim 10 , comprising one or more straps configured to couple the actuator across the joint of the human body part.

12. The apparatus of claim 1 , where at least one of the one or more sensors comprises a pressure sensor in fluid communication with the interior of at least one of the cell(s) and configured to capture data indicative of an internal pressure of the at least one cell.

13. The apparatus of claim 1 , where at least one of the one or more sensors comprises at least one of a position, velocity, and acceleration sensor configured to capture data indicative of movement of the second segment relative to the first segment.

14. The apparatus of claim 1 , wherein the haptics processor is further configured to:
receive data captured by at least one of the one or more sensors; and
identify one or more processor-executable commands associated with data captured by the at least one sensor.

15. An apparatus comprising: a plurality of actuators, each
comprising:
a haptic processor;
a semi-rigid first segment;
a semi-rigid second segment; and
one or more flexible cells disposed between the first segment and the second segment, each cell having a first end and a second end;
where the actuator is configured to be coupled to a fluid source such that the fluid source can communicate fluid to vary internal pressures of the one or more cells; and
where each cell is configured such that adjustments of an internal pressure of the cell rotates the first end relative to the second end to angularly displace the second segment relative to the first segment; and
one or more sensors configured to detect one or more physical characteristics, where at least one of the one or more sensors comprise a pressure sensor coupled to one of the segments and configured to capture data indicative of a force applied between the one of the segments and an object coupled to the one of the segments;

a frame or wearing fixture;
where each of the plurality of actuators is coupled to the frame or wearing fixture; and
where the haptic processor is configured to receive the data indicative of the force applied between the one of the segments and the object and to communicate with the actuator to ensure that the force applied between the one of the segments and the object does not exceed a threshold.

16. The apparatus of claim 15 , where the apparatus is configured to be coupled to a human hand such that each of the plurality of actuators is coupled to a human finger of the human hand.

17. The apparatus of claim 15 , where at least one of the one or more sensors comprises a pressure sensor in fluid communication with the interior of at least one of the cell(s) and configured to capture data indicative of an internal pressure of the at least one cell.

18. The apparatus of claim 15 , where at least one of the one or more sensors comprises at least one of a position, velocity, and acceleration sensor configured to capture data indicative of movement of the second segment relative to the first segment.

19. The apparatus of claim 15 , wherein the haptics processor is further configured to: receive data captured by at least one of the one or more sensors; and
identify one or more processor-executable commands associated with data captured by the at least one sensor.

Assignees

• Univ Texas

Inventors

• Wijesundara Muthu
• Carrigan Wei
• Haghshenas Jaryani Mahdi

Classifications

• F15B15/10

  the motor being of diaphragm type · CPC title

• A61H2201/5079

  Velocity sensors · CPC title

• A61H2201/5069

  Angle sensors · CPC title

• A61H2201/5051

  hydraulically controlled · CPC title

• A61H2201/5043

  Displays · CPC title