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Title: Spring-loaded polymeric gel actuators

Abstract

Spring-loaded electrically controllable polymeric gel actuators are disclosed. The polymeric gels can be polyvinyl alcohol, polyacrylic acid, or polyacrylamide, and are contained in an electrolytic solvent bath such as water plus acetone. The action of the gel is mechanically biased, allowing the expansive and contractile forces to be optimized for specific applications.

Inventors:
 [1]
  1. (Albuquerque, NM)
Publication Date:
Research Org.:
AT & T CORP
OSTI Identifier:
869746
Patent Number(s):
US 5389222
Assignee:
United States of America as represented by United States (Washington, DC) SNL
DOE Contract Number:
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
spring-loaded; polymeric; actuators; electrically; controllable; disclosed; gels; polyvinyl; alcohol; polyacrylic; acid; polyacrylamide; contained; electrolytic; solvent; bath; water; plus; acetone; action; mechanically; biased; allowing; expansive; contractile; forces; optimized; specific; applications; polyacrylic acid; polyvinyl alcohol; specific application; acrylic acid; specific applications; electrically controllable; solvent bath; electrolytic solvent; vinyl alcohol; polymeric gels; loaded polymer; /204/

Citation Formats

Shahinpoor, Mohsen. Spring-loaded polymeric gel actuators. United States: N. p., 1995. Web.
Shahinpoor, Mohsen. Spring-loaded polymeric gel actuators. United States.
Shahinpoor, Mohsen. Sun . "Spring-loaded polymeric gel actuators". United States. doi:. https://www.osti.gov/servlets/purl/869746.
@article{osti_869746,
title = {Spring-loaded polymeric gel actuators},
author = {Shahinpoor, Mohsen},
abstractNote = {Spring-loaded electrically controllable polymeric gel actuators are disclosed. The polymeric gels can be polyvinyl alcohol, polyacrylic acid, or polyacrylamide, and are contained in an electrolytic solvent bath such as water plus acetone. The action of the gel is mechanically biased, allowing the expansive and contractile forces to be optimized for specific applications.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1995},
month = {Sun Jan 01 00:00:00 EST 1995}
}

Patent:

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  • Spring-loaded electrically controllable polymeric gel actuators are disclosed. The polymeric gels can be polyvinyl alcohol, polyacrylic acid, or polyacrylamide, and are contained in an electrolytic solvent bath such as water plus acetone. The action of the gel is mechanically biased, allowing the expansive and contractile forces to be optimized for specific applications. 5 figs.
  • Intelligent material systems and structures have become important in recent years due to some potential engineering applications. Accordingly, based on such materials, structures and their integration with appropriate sensors and actuators, novel applications, useful for a large number of engineering applications have emerged. Here, a mathematical model is presented for the dynamic response of contractile fiber bundles embedded in or around elastic springs that are either linear helical compression springs or hyperelastic springs such as rubber-like materials. The fiber bundle is assumed to consist of a parallel array of contractile fibers made from either contractile polymeric muscles such as polyacrylicmore » acid plus sodium acrylate cross-linked with bisacrylamide (PAAM) or polyacrylonitrile (PAN) fibers. The proposed model considers the electrically or pH-induced contraction of the fibers which may include resistive heating of the fiber in case of shape-memory alloys. The theory then branches out to two different description of such processes for ionic polymeric gel fiber bundles and shape-memory alloy fiber bundles.« less
  • Electrically controlled polymeric gel actuators or synthetic muscles capable of undergoing substantial expansion and contraction when subjected to changing pH environments, temperature, or solvent. The actuators employ compliant containers for the gels and their solvents. The gels employed may be cylindrical electromechanical gel fibers such as polyacrylamide fibers or a mixture of poly vinyl alcohol-polyacrylic acid arranged in a parallel aggregate and contained in an electrolytic solvent bath such as salt water. The invention includes smart, electrically activated devices exploiting this phenomenon. These devices are capable of being manipulated via active computer control as large displacement actuators for use inmore » adaptive structure such as robots.« less
  • Electrically controlled polymeric gel actuators or synthetic muscles are described capable of undergoing substantial expansion and contraction when subjected to changing pH environments, temperature, or solvent. The actuators employ compliant containers for the gels and their solvents. The gels employed may be cylindrical electromechanical gel fibers such as polyacrylamide fibers or a mixture of poly vinyl alcohol-polyacrylic acid arranged in a parallel aggregate and contained in an electrolytic solvent bath such as salt water. The invention includes smart, electrically activated devices exploiting this phenomenon. These devices are capable of being manipulated via active computer control as large displacement actuators formore » use in adaptive structure such as robots. 11 figures.« less
  • This invention deals with spring loaded locator pins. Locator pins are sometimes referred to as captured pins. This is a mechanism which locks two items together with the pin that is spring loaded so that it drops into a locator hole on the work piece. 5 figs.