F28F11/04 - CPC Classification Index

ClassID:

162213 ⎘

F28F11/04 - CPC Classification

Classification description:

Arrangements for sealing leaky tubes and conduits using pairs of obturating elements, e.g. washers, mounted upon central operating rods

Recent Application in this class:

20240175647

CERAMIC TUBE PLUG

20180100707

Reduction of scale build-up in an evaporative cooling apparatus

20140374067

Reduction of scale build-up in an evaporative cooling apparatus

20110240278

Plug kit for pressured components

20090172945

Double Expansion Boiler Tube Plug

20060277756

Boiler plug