Vent for canister of liquid or gas comprises rubber or plastic sleeve which fits into bore in canister wall and has flange which rests on its top, hollow bolt with vent apertures screwing into this

摘要

The vent for a canister of liquid or gas comprises a rubber or plastic sleeve (2) which fits into a bore in the canister wall (3) and has a flange which rests on its top. A hollow bolt (1) with vent apertures screws into this. Alternatively a threaded bush is used with a conventional bolt screwed into its top.