Patent ID: 7357792

Claim:
A medical valve having an open mode to permit fluid flow and a closed mode to prevent fluid flow, the medical valve comprising: a body forming an interior, a proximal port, and a distal port, the interior having a fluid channel between the proximal port and the distal port; and a valving element within the interior of the body, the valving element controlling fluid flow between the proximal and distal ports, the valving element including a resilient member and a plug, the resilient member forming a fluid chamber within the interior of the body, the fluid chamber being at least a part of the fluid channel, the plug cooperating with the resilient member to provide an internal seal within the interior of the body, the internal seal being spaced from the proximal port, the plug radially stretching the resilient member when the valve transitions from the closed mode to the open mode, the radial expansion causing the fluid chamber to have a larger volume when in the open mode than when in the closed mode, the radial expansion also causing the fluid channel to have a larger volume when in the open mode than when in the closed mode.