Valve with shape memory alloy wire

A valve, comprising:

• a housing,
• a fluid port arranged in the housing,
• a plunger configured to seal the fluid port in a first position and to unseal the fluid port in a second position and to displace along a displacement direction from the first position towards the second position, and
• at least one shape memory alloy actuator extending along the displacement direction for at least 50% of a length of the at least one shape memory alloy actuator and configured to exert an actuation force on the plunger to displace the plunger from the first position towards the second position,
• wherein the at least one shape memory alloy actuator has a first end coupled to the plunger and further has a second end also coupled to the plunger.

A valve, comprising:

• a housing,
• a fluid port arranged in the housing,
• a plunger configured to seal the fluid port in a first position and to unseal the fluid port in a second position and to displace along a displacement direction from the first position towards the second position,
• at least one shape memory alloy actuator extending along the displacement direction for at least 50% of a length of the at least one shape memory alloy actuator and configured to exert an actuation force on the plunger to displace the plunger from the first position towards the second position,
• a further fluid port,
• a further plunger configured to seal the further fluid port in a first position and to unseal the further fluid port in a second position and to displace along a displacement direction of the further plunger from the second position of the further plunger towards the first position of the further plunger, and
• a coupling configured to at least partially translate the displacement of the plunger into the displacement of the further plunger, wherein the coupling comprises a lever having an engagement surface configured to engage with the plunger for at least a part of the displacement of the plunger.

A valve, comprising:

• a housing,
• a fluid port arranged in the housing,
• a plunger configured to seal the fluid port in a first position and to unseal the fluid port in a second position and to displace along a displacement direction from the first position towards the second position,
• at least one shape memory alloy actuator extending along the displacement direction for at least 50% of a length of the at least one shape memory alloy actuator and configured to exert an actuation force on the plunger to displace the plunger from the first position towards the second position,
• a further fluid port,
• a further plunger configured to seal the further fluid port in a first position of the further plunger and to unseal the further fluid port in a second position of the further plunger and to displace along a displacement direction of the further plunger from the second position of the further plunger towards the first position of the further plunger,
• a coupling configured to at least partially translate the displacement of the plunger into the displacement of the further plunger, and
• a resilient member configured to exert a bias force on the plunger,
• wherein the coupling is configured to transmit the bias force to the further plunger and to not transmit the actuation force to the further plunger.