Patent ID: 8888834

Claim:
A deployment assembly for deploying one or more components of an endovascular introducer assembly provided with a retractable element, the deployment assembly comprising an external manipulation element having a locked and unlocked state, and an actuator element coupled to the external manipulation element, said actuator element comprising a spiral spring that is initially biased and restrained by the external manipulation element in said locked state from exerting a restoring force, wherein said spring is released by actuation of said external manipulation element to said unlocked state, said spring thereby exerting said restoring force on a wheel to retract said retractable element in response to said external manipulation element being actuated from said locked state to said unlocked state, and further comprising a first damper and a second damper, said first and second dampers being rotary dampers coupled to said wheel, said second damper being a two-speed damper that disengages from said wheel after a first phase of retraction of the retractable element, said first and second dampers applying a higher dampening force on said wheel to retract said retractable element at a slower rate during said first phase of retraction, and said first damper applying a lower dampening force on said wheel than said first and second dampers to retract said retractable element at a higher rate after said first phase.