US Patent 7914439 Implantable penile prosthesis pump

Pumps for use with inflatable implantable penile prostheses in accordance with the invention include features that can provide for free fluid flow during inflation and deflation modes of the pump. Pumps may also include a bypass chamber that is fluidly connected to the fluid passageway by a bypass input channel and a bypass output channel. The bypass chamber comprises a bypass check valve biased toward a closed position.