Patent ID: 8551055

Claim:
An ambulatory medical device, comprising: a reservoir; a fluid transfer device operably connected to the reservoir and including a fluid transfer device housing and a pump associated with the fluid transfer device housing; and a pressure regulator, in fluidic communication with the pump and/or the reservoir, having a pressure regulator housing including an inlet and an outlet, a valve seat including an opening located between the inlet and the outlet, and a valve element operably associated with a reference pressure and movable relative to the valve housing between a closed position where the valve element engages the valve seat and prevents fluid flow from the inlet to the outlet, and an open position where the valve element is in spaced relation to the valve seat and does not prevent fluid flow from the inlet to the outlet, wherein one of the valve seat and the valve element includes a main portion and a seal portion that is less tacky than the main portion and is engaged by the other of the valve seat and the valve element when the valve element is in the closed position.