Back to results
US 9,810,340 B2Granted
Device for opening or closing a seal set of a valve
AssigneeAstrium GmbH
InventorsStephan Kraus, Thomas Maier, Markus Wolf
Life of this patent
Estimating the term…
Abstract
A device for opening or closing a seal seat of a valve arranged in a pipe for liquid or gaseous media includes a one-time only activation of the valve using a shape memory actuator. The shape memory actuator changes its external shape abruptly when a transformation temperature is reached that is dependent upon its alloy composition. The transformation temperature can be generated by a controllable electrical heating device of the device.
Drawings
Claims12
A device, comprising:
- a valve, which includes a seal seat and which is coupled to a pipe carrying liquid or gaseous media;
- a shape memory actuator-configured to abruptly change its external shape when a transformation temperature dependent upon an alloy composition of the shape memory actuator is reached, wherein the shape change activates the valve and irreversibly activates an engaging mechanism into a state in which reverse activation of the valve is mechanically arrested;
- and
- a controllable electrical heating device, which is configured to generate the transformation temperature,
- wherein the seal seat is a metal seal that is pressed against a counterpart in a sealed state,
- wherein the metal seal is formed from a ductile material that is plastically deformed when pressed against the counterpart, and
- wherein the engaging mechanism activates as soon as the sealed state is reached.
4 more elements
Dependencies are inferred from the claim text.