Patent ID: 8337392

Claim:
A pump connected to a body implantable penile prosthesis including a reservoir maintaining a fluid volume that is transferrable into a cylinder of the penile prosthesis, the pump comprising: a pump bulb connected to a pump body that is in fluid communication with the reservoir and the cylinder; an inlet valve operable to allow a portion of the fluid volume to be drawn from the reservoir and delivered into the pump bulb; an exhaust valve operable to allow the portion of the fluid volume delivered into the pump bulb to be pumped into the cylinder; and an anti-autoinflation (AAI) valve disposed in the pump body and comprising a valve stem and a seal attached to the valve stem, the seal located between the inlet valve and the exhaust valve and biased to prevent fluid flow from bypassing the pump bulb and flowing from the reservoir to the cylinder; wherein the AAI valve comprises the valve stem including a flange disposed on a first end portion, and a conical spring coupled axially to the valve stem between the flange and the seal, the conical spring configured to bias the seal away from the flange.