Patent ID: 7838143

Claim:
A current interrupt device, comprising: a) a first conductive plate, composed at least in part of aluminum, including: i) a frustum having a first end, a second end, the first end having a broader diameter than the second end, ii) a base extending radially from a perimeter of the first end of the frustum, and iii) an essentially planar cap sealing the second end of the frustum; and b) a second conductive plate, composed at least in part of aluminum, in electrical communication at a point of electrical contact with the essentially planar cap of the first conductive plate, wherein the second conductive plate defines at least one through-hole, whereby equalization of pressure between opposite sides of the second conductive plate is maintained without interference by the first conductive plate, and whereby higher pressure on a first surface of the first conductive plate facing the second conductive plate relative to a second surface of the first conductive plate will cause separation of the first conductive plate from the second conductive plate to thereby disrupt electrical communication at the electrical contact.