Invention Grant
- Patent Title: Normally-closed zero-leak valve with magnetostrictive actuator
-
Application No.: US14868041Application Date: 2015-09-28
-
Publication No.: US09657858B2Publication Date: 2017-05-23
- Inventor: Daniel J. Ramspacher , James A. Richard
- Applicant: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Applicant Address: US DC Washington
- Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Current Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Current Assignee Address: US DC Washington
- Main IPC: F16K17/40
- IPC: F16K17/40 ; F16K31/06
Abstract:
A non-pyrotechnic, normally-closed, zero-leak valve is a replacement for the pyrovalve used for both in-space and launch vehicle applications. The valve utilizes a magnetostrictive alloy for actuation, rather than pyrotechnic charges. The alloy, such as Terfenol-D, experiences magnetostriction, i.e. a gross elongation, when exposed to a magnetic field. This elongation fractures a parent metal seal, allowing fluid flow through the valve. The required magnetic field is generated by redundant coils that are isolated from the working fluid.
Public/Granted literature
- US20170089476A1 NORMALLY-CLOSED ZERO-LEAK VALVE WITH MAGNETOSTRICTIVE ACTUATOR Public/Granted day:2017-03-30
Information query
