Apparatuses for securing components of a drug delivery system during transport and methods of using same
An assembly of a drug delivery system, comprising: a first component; a second component which is configured to move linearly with respect to the first component; and, a resistance element configured to resist linear movement during transport of the first component with respect to the second component in a closed transport configuration but which is adapted to be overcome during nominal operation of the drug delivery system.
1. A telescoping assembly of a drug delivery system, comprising:
a first component having a threaded member;
a second component nested with the first component and threadedly linked with the threaded member of the first component, the second component being configured to move linearly with respect to the first component upon application of torque to one of the first and second components; and,
a resistance element configured to resist linear movement during transport of the first component with respect to the second component in a closed transport configuration but which is adapted to be overcome during nominal operation of the drug delivery system, the resistance element including multiple interference elements forming a snap interference wherein one interference element snaps over another interference element to overcome the resistance to linear movement.
2. The telescoping assembly of claim 1 , wherein the closed transport configuration is the state of the assembly before the linear movement of the second component with respect to the first component effectuates pumping in the drug delivery system.
3. The telescoping assembly of claim 1 , wherein the second component further includes a pushing element and the first component further includes a drive element.
4. The telescoping assembly of claim 1 , wherein the multiple interference elements comprise an annular ring and a counterpart lip.
5. The telescoping assembly of claim 4 , wherein a pushing element is provided with the annular ring and a drive element is provided with the counterpart lip, which when the ring and the lip are forced together create the resistance to extension of the assembly.
6. The telescoping assembly of claim 1 , wherein each interference element includes a tooth fitting into a recess.
7. The telescoping assembly of claim 1 , wherein the torque required to overcome the resistance element is less than the nominal operative torque required to stall a driving motor of the drug delivery system.
8. The telescoping assembly of claim 1 , wherein the required torque to overcome the resistance element is varied from 50-300 gr-cm.
9. The telescoping assembly of claim 1 , wherein the resistance element is overcome by deformation of at least a portion of at least one of the first and second components.
10. The telescoping assembly of claim 9 , wherein the deformation is at least one of elastic and plastic deformation.
11. The telescoping assembly of claim 1 , wherein the resistance element includes a sloped contact surface.