Shrinkable sleeve adapted for cable and tubing gas flow blocking

A compact one-piece shrinkable unbranched sleeve made from a recoverable material having an elastic memory and having an outer wall extending along the entire length thereof and which, while in an expanded state, is able to be secured to the end of a bundle having one or more components extending from the end thereof to provide a barrier of minimal outside dimension to the flow of gas or vapors through the bundle, said sleeve in the expanded state having an opening disposed at one end thereof that is adapted to permit insertion of the end of the bundle into a cavity disposed within the sleeve communicating with the opening, said cavity enclosed by the outer wall of the sleeve and in said expanded state adapted to receive the end of the bundle and having a length thereof extending along the length of the sleeve that is sufficient to insure the securement of the sleeve to the bundle;

• A plurality of channels disposed internally within the outer wall of the sleeve that extend along the length thereof between the cavity and the end of the sleeve opposite to the end into which the bundle is inserted, said channels having an opening at one end thereof communicating with the cavity and an opening at the opposite end, said channels surrounded by the outer wall of the sleeve and enclosed by inner walls of the sleeve that are integrally related directly or indirectly with the outer wall forming the remainder of the sleeve, said channels in the expanded state adapted to receive the components from the cavity in the combinations thereof desired and having sufficient length to permit the components to extend therethrough and emerge from the opening thereof at the opposite end;
• and
• said sleeve dimensionally adapted such that when the sleeve is caused to shrink from the expanded state onto the end of the bundle the outer wall of the sleeve surrounding the cavity is able to contract against the outer surface of the bundle to secure the engagement therebetween and the remainder of the outer wall of the sleeve surrounding the channels in combination with the inner walls enclosing the channels are able to constrict against the outer surface of the components contained therein to provide a barrier to the flow of gas or vapors through the bundle.