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Title: Bistable Microvalve For Use With Microcatheter System

Abstract

A bistable microvalve of shape memory material is operatively connected to a microcatheter. The bistable microvalve includes a tip that can be closed off until it is in the desired position. Once it is in position it can be opened and closed. The system uses heat and pressure to open and close the microvalve. The shape memory material will change stiffness and shape when heated above a transition temperature. The shape memory material is adapted to move from a first shape to a second shape, either open or closed, where it can perform a desired function.

Inventors:
 [1]
  1. Dublin, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
879957
Patent Number(s):
6663821
Application Number:
10/382412
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16K - VALVES
B - PERFORMING OPERATIONS B81 - MICROSTRUCTURAL TECHNOLOGY B81B - MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Seward, Kirk Patrick. Bistable Microvalve For Use With Microcatheter System. United States: N. p., 2003. Web.
Seward, Kirk Patrick. Bistable Microvalve For Use With Microcatheter System. United States.
Seward, Kirk Patrick. Tue . "Bistable Microvalve For Use With Microcatheter System". United States. https://www.osti.gov/servlets/purl/879957.
@article{osti_879957,
title = {Bistable Microvalve For Use With Microcatheter System},
author = {Seward, Kirk Patrick},
abstractNote = {A bistable microvalve of shape memory material is operatively connected to a microcatheter. The bistable microvalve includes a tip that can be closed off until it is in the desired position. Once it is in position it can be opened and closed. The system uses heat and pressure to open and close the microvalve. The shape memory material will change stiffness and shape when heated above a transition temperature. The shape memory material is adapted to move from a first shape to a second shape, either open or closed, where it can perform a desired function.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {12}
}

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Works referenced in this record:

A bistable pneumatic microswitch for driving fluidic components
journal, June 1996


Thermomechanical Constitutive Modeling in Shape Memory Polymer of Polyurethane Series
journal, August 1997


Microvalves with bistable buckled polymer diaphragms
journal, March 1996


Mechanical Properties of Shape Memory Polymer of Polyurethane Series : Basic Characteristics of Stress-Strain-Temperature Relationship
journal, January 1992