POMPA AD AZIONAMENTO MANUALE PER LA EROGAZIONE SOTTO PRESSIONE DI SOSTANZE LIQUIDE E/O DENSE RACCHIUSE IN UN CONTENITORE SUL QUALE LA POMPA E' MONTATA

• Main Authors: BALDI ANDREA INCERTI, ALBINI GIOVANNI, TORRETTA ROBERTO, TOMASO RASCITTI
• Format: Patent
• Language: Italian
• Published: 20.08.1986
• Edition: 4
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ATOMISING APPARATUS; BLASTING; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; HEATING; LIGHTING; MECHANICAL ENGINEERING; NOZZLES; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SPRAYING APPARATUS; SPRAYING OR ATOMISING IN GENERAL; STORING; TRANSPORTING; WEAPONS

The invention relates to a pump applicable to containers holding a substance to be delivered or dispensed under pressure, which pump is manually operable. The pump includes a hollow stem movable within a hollow body, urged out of the latter by a spring and retained therein by a ring sealingly connectable or hookable on a ring nut which can be secured on the mouth or inlet member of a substance container. A seal of H-cross-section is mounted and movable on the stem and by its lips seals on the inner surface of the hollow body, on the outer surface of the stem, on a tubular extension projecting from the above mentioned ring, and respectively in either of two annular grooves presented by the stem or bodies associated therewith. On moving between such grooves during the movement of the stem, the seal closes or clears a channel through which the pressure substance can exit as previously sucked within the hollow body, which bears on the outward facing surface of an annular edge projecting from the ring nut. Thus, the same body of the pump can be applied on containers of different sizes, by merely changing its supporting and fastening ring nut on each container, and additionally the pump body cannot fall within the container, whenever pressure is applied on its stem.