Hydraulic fuse

A hydraulic fuse comprising:

• a fuse body defining a plenum, the plenum comprising:
• an inlet configured to couple to a first fluid location;
• and
• an outlet configured to couple to a second fluid location;
• a first fuse element arranged to close the inlet, the first fuse element configured to open the inlet when a pressure differential between the first fluid location and the plenum reaches a first threshold;
• a second fuse element arranged to close the outlet, the second fuse element configured to open the outlet when a pressure differential between the plenum and the second fluid location reaches a second threshold, wherein the first threshold is higher than the second threshold;
• wherein in an inactive state, the inlet is closed by the first fuse element and the outlet is closed by the second fuse element to prevent fluid flow through the plenum;
• and wherein in an active state, the pressure differential between the first fluid location and the plenum reaches the first threshold to cause the first fuse element to open and permit fluid flow through the inlet, and the pressure differential between the plenum and the second fluid location reaches the second threshold to cause the second fuse element to open and permit fluid flow through the outlet;
• wherein the first fuse element and the second fuse element each comprise a respective retention feature configured to retain the first fuse element and the second fuse element within the plenum in the active state;
• wherein the first fuse element and/or the second fuse element are flexibly attached to the fuse body, such that in the active state, the first fuse element and/or the second fuse element are configured to bend and remain attached to the fuse body to provide the retention feature;
• and
• wherein the first fuse element and/or the second fuse element comprises a plurality of ridges formed on a surface facing into the plenum.

A hydraulic fuse comprising:

• a fuse body defining a plenum, the plenum comprising:
• an inlet configured to couple to a first fluid location;
• and
• an outlet configured to couple to a second fluid location;
• a first fuse element arranged to close the inlet, the first fuse element configured to open the inlet when a pressure differential between the first fluid location and the plenum reaches a first threshold;
• a second fuse element arranged to close the outlet, the second fuse element configured to open the outlet when a pressure differential between the plenum and the second fluid location reaches a second threshold, wherein the first threshold is higher than the second threshold;
• wherein in an inactive state, the inlet is closed by the first fuse element and the outlet is closed by the second fuse element to prevent fluid flow through the plenum;
• and wherein in an active state, the pressure differential between the first fluid location and the plenum reaches the first threshold to cause the first fuse element to open and permit fluid flow through the inlet, and the pressure differential between the plenum and the second fluid location reaches the second threshold to cause the second fuse element to open and permit fluid flow through the outlet;
• wherein the first fuse element and the second fuse element each comprise a respective retention feature configured to retain the first fuse element and the second fuse element within the plenum in the active state when the respective fuse element has completely detached form the fuse body.