Patent ID: 11931552
Assignee: WEST PHARMA. SERVICES IL, LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A medicament delivery device, comprising:
a housing having a compartment;
a cartridge bay configured to pivot relative to the housing between an open position and a closed position, wherein the cartridge bay is configured to receive a cartridge when in the open position and be received in the compartment when in the closed position;
a motor within the housing; and
an expanding assembly within the housing, the expanding assembly comprising:
a driver configured to be rotated by the motor;
a first mid screw threadedly connected around the driver;
a second mid screw threadedly connected around the first mid screw;
a plunger driver threadedly connected around the second mid screw, wherein the plunger driver is configured to push a plunger seal through a reservoir of the cartridge to deliver a medicament; and
an anti-rotational guide disposed around the plunger driver and being configured to prevent rotation of the plunger driver relative to the housing.