Patent ID: 9474859
Filing Date: 2016-10-25
CPC Classification: A61M,Y10T

Claim Text:
1. A shuttering mechanism for controlling translation of a longitudinally moveable component within an elongate housing, the shuttering mechanism comprising: a plurality of castellations longitudinally disposed on the housing; and at least one resilient arm associated with the longitudinally moveable component, the resilient arm having a dog resiliently biased towards the castellations, the dog adapted to engage between or behind the castellations and block the translation of the longitudinally moveable component, wherein a respective shutter arm is arranged alongside the plurality of castellations, the shutter arm having a plurality of consecutive ramped protrusions spaced from each other, wherein the castellations and the ramped protrusions have the same pitch, wherein a profiled surface is formed by the castellations and the ramped protrusions, wherein the shutter arm is moveable in a longitudinal direction with respect to the plurality of castellations, and wherein the shutter arm has at least one locking position with its ramped protrusions essentially in phase with the castellations thus allowing the dog of the resilient arm to catch between or behind the castellations and wherein the shutter arm has at least one unlocking position with its ramped protrusions out of phase with the castellations in such a manner that the ramped protrusions prevent the dog from engaging with the castellations or disengage them thus allowing translation of the longitudinally moveable component.