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Unscrewing the bottom, it is possible to extract the cylindrical piston, which slides tightly with respect to the body of the pen, and to carry out the pumping action through it. The mechanism is very functional and clearly more advanced than the [[vacumatic filler|vacumatic]] and other similar systems because unlike that it does not require membranes or other flexible rubber elements, and has a greater mechanical simplicity. The disadvantage is the slightly larger size of the mechanism.

Unscrewing the bottom, it is possible to extract the cylindrical piston, which slides tightly with respect to the body of the pen, and to carry out the pumping action through it. The mechanism is very functional and clearly more advanced than the [[vacumatic filler|vacumatic]] and other similar systems because unlike that it does not require membranes or other flexible rubber elements, and has a greater mechanical simplicity. The disadvantage is the slightly larger size of the mechanism.

Nonostante sia fra i più evoluti, efficaci ed interessanti fra i sistemi di caricamento, che presenta tutti i pregi degli altri sistemi a sfiatatoio e nessuno dei problemi legati alla presenza di membrane flessibili in gomma, lo [[stantuffo tuffante]] ha purtroppo avuto una scarsa diffusione, che lo vede limitato nel suo utilizzo alle penne della [[Dunn]] ed al citato modello [[Lucens]] della [[OMAS]].<noinclude>

Although it is one of the most advanced, effective and interesting filling systems, which has all the advantages of other breather tube systems and none of the problems related to the presence of flexible rubber membranes, the ''"stantuffo tuffante"'' unfortunately had a low diffusion, which sees it limited in its use to the [[Dunn]] pens and the aforementioned model [[Lucens]] of [[OMAS]].<noinclude>

==Brevetti correlati==

==Related Patents===

{{ListaBrevettiFeature|Stantuffo tuffante}}

{{ListsPatentsFeature|Stantuffo tuffante}}

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