| 摘要 |
1281338 Container closures J H FENNER & CO Ltd 29 Aug 1969 [31 Aug 1968] 41708/68 Heading B8T [Also in Division B1] The body 3 of an oil filler breather plug includes an externally screw-threaded portion for engagement in a screw-threaded aperture in a machine casing, ventillation passages 5, 6 for venting the machine casing to an exit port or ports at the exterior of the body and a filter element, formed of interstitial plastics material, located externally of the plug body and enclosing said port or ports. The filter element may be annular and held between shoulders 11 on the plug body and a screw-down cap 9. The body may be of metal or rigid plastics material. |
