US 9,810,340 B2
Device for opening or closing a seal set of a valve
Stephan Kraus, Oedheim (DE); Thomas Maier, Lauffen (DE); and Markus Wolf, Mannheim (DE)
Assigned to Astrium GmbH, Taufkirchen (DE)
Filed by Astrium GmbH, Taufkirchen (DE)
Filed on Jul. 24, 2014, as Appl. No. 14/339,953.
Claims priority of application No. 10 2013 012 377 (DE), filed on Jul. 25, 2013.
Prior Publication US 2015/0028234 A1, Jan. 29, 2015
Int. Cl. F16K 11/048 (2006.01); F16K 31/02 (2006.01); F03G 7/06 (2006.01); B64G 1/40 (2006.01); F02K 9/58 (2006.01)
CPC F16K 31/025 (2013.01) [B64G 1/402 (2013.01); F02K 9/58 (2013.01); F03G 7/065 (2013.01); F16K 11/048 (2013.01); F05D 2220/60 (2013.01); F05D 2300/505 (2013.01)] 12 Claims
OG exemplary drawing
 
1. 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.