Closure device

A closure device for closing a bodily passageway, the closure device comprising:

• a first frame;
• a sheet of biocompatible material attached to the first frame;
• a first crossbar extending across the first frame, the first crossbar having terminal crossbar ends connectively linked to separate sites on the first frame;
• a second crossbar attached to the first crossbar at a connection point;
• and
• a second frame, the second crossbar extending across the second frame, the second crossbar having terminal crossbar ends connectively linked to separate sites on the second frame,
• wherein the first crossbar and the second crossbar are each configured to bend away from the connection point when the closure device is deployed to close a bodily passageway,
• wherein each of the first and second frames and the first and second crossbars comprise at least one hollow tube,
• wherein at least one first retention member extends through a lumen of the hollow tube of the first frame and connects the first crossbar to the first frame,
• wherein at least one second retention member extends through a lumen of the hollow tube of the second frame and connects the second crossbar to the second frame,
• the closure device further comprising a third crossbar and a fourth crossbar, the third crossbar having terminal crossbar ends connectively linked to separate sites on the first frame, and the fourth crossbar having terminal ends connectively linked to separate sites on the second frame,
• the connection point being a first connection point, wherein the third crossbar is attached to the fourth crossbar at a second connection point, the third and fourth crossbars being configured to bend away from the second connection point when the closure device is deployed to close a bodily passageway.