Method for fluid delivery

A method for filling an infusion pump having a reusable housing assembly having a pump and fluid control mechanism, a disposable housing assembly having a reservoir and a septum fluidly connected to the reservoir for filling, a shutter having a first position covering the septum and a second position proving access to the septum, a bias mechanism for biasing the shutter to the first position, a latch for holding the shutter in the second position, a fluid passage for passing the fluid to a patient and a filling assembly having a needle and a fluid, the method comprising:

• latching the shutter in the second position;
• piercing the septum with the needle;
• inserting fluid to the reservoir through the needle;
• contacting the filling assembly to the septum access assembly;
• removing the needle from the septum, whereby the removal disengages the latch to allow the bias mechanism to move the septum access assembly from the second position to the first position;
• and attaching the reusable housing assembly to the disposable assembly.

A method for filling an infusion pump having a reusable housing assembly having a pump and fluid control mechanism, a disposable housing assembly having a reservoir and a septum fluidly connected to the reservoir for filling, a shutter having a first position covering the septum and a second position proving access to the septum, a bias mechanism for biasing the shutter to the first position, a fluid passage for passing the fluid to a patient and a filling assembly having a shutter displacement assembly, a needle and a fluid, the method comprising:

• contacting the filling assembly to the septum access assembly;
• displacing the shutter from the first position to the second position with the shutter displacement assembly;
• piercing the septum with the needle;
• inserting fluid to the reservoir through the needle;
• removing the needle from the septum, whereby the removal allows the bias mechanism to move the septum access assembly from the second position to the first position;
• and attaching the reusable housing assembly to the disposable assembly.