| abstract |
A valve (50) includes a substrate defining an upstream channel (52) and a downstream channel (54) joined by a conduit defined by a first opposed wall (74) disposed at an angle to the central axis (60) of the upstream channel (52). At least a portion of a thermally responsive substance (56) obstructs the conduit by abutment with the first opposed wall (74). Upon actuation of a heat source (37), in thermal contact with the thermally responsive substance (56), an opening motion of the thermally responsive substance (56) opens the conduit. |