| 摘要 |
<p>Flow restriction device for restricting flow through a conduit, the flow restriction device comprising: a deformable insert (14) the deformable insert being adapted, in use, to be located in or adjacent to an insert support; at least one pressure generating material portion (36) adapted in use, to generate a deformation force in response to an activation signal from a trigger (38) the deformation force adapted to deform the deformable insert wall section (64) when applied to the deformation insert outer surface to reduce a throughbore cross sectional area.</p> |
