Patent ID: 8128607

Claim:
A reduced pressure treatment system, comprising: a flexible polyurethane cover comprising a first side, a second side, and an opening therethrough; a hydrocolloid adhesive located on the first side of the cover; a flexible port attached to the second side of the cover, the port comprising a tubing connector and lumen in communication with the opening of the cover; a tube attached to the port at the tubing connector; an elongate activation key; a chamber adapted to create a reduced pressure, said chamber having a distal end wall with an inlet opening, a proximal opening, and a rigid non-circular side wall between the seal end wall and the proximal opening; and a seal located within the chamber, the seal comprising a perimeter that forms a vacuum-resistant seal with the rigid non-circular side wall of the chamber and is configured to slide along a longitudinal axis of the chamber while creating said reduced pressure and to removably receive the distal end of an elongate activation key; a proximal end cap attached about the proximal opening of the vacuum chamber, the proximal end cap comprising an activation key opening, and a spring attachment site; and at least one coiled ribbon spring located in the chamber, the spring comprising a distal end attached to the seal and a proximal end attached to the spring attachment site of the proximal end cap.