Abrégé

A suck-back valve selectively actuatable for dispensing liquid in its open condition from an associated liquid storage container, and for avoiding continued presence of excess dispensed liquid about the exit orifice in the closed condition of the valve, is formed at least in part of a spring member and a pin. The spring member includes a distal web that defines a valve seat and a dispensed liquid exit orifice, a proximal web, and a plurality of flexibly elastic bands helically connecting the distal and proximal webs. The pin includes an elongated shaft having a proximal end secured to the proximal web and carrying a substantially hollow frustoconical cone at its distal end. The cone has an outer valving surface for releasable abutment with the valve seat and the shaft has a bore of predetermined cross-sectional extent defined longitudinally along and within the shaft to create a continuous fluid passageway through and along the pin. Dispensed liquid remaining proximate the exit orifice is sucked back into the liquid container through the shaft bore as the valve returns from its open to its closed condition under the return urgency of the elastic bands.

Classes IPC  ?

• B65D 37/00 - Réceptacles flexibles transportables non prévus ailleurs
• B65D 35/50 - Fermetures avec valves s'ouvrant quand le réceptacle tubulaire est déformé
• B65D 35/00 - Réceptacles pliables, de forme tubulaire, conçus de telle sorte que l'expulsion de leur contenu leur donne une déformation permanente, p. ex. tubes souples pour dentifrice ou autres produits plastiques ou semi-liquidesSupports adéquats
• B05B 11/04 - Récipients déformables produisant l’écoulement, p. ex. bouteilles compressibles
• B05B 11/00 - Appareillages monoblocs tenus à la main dans lesquels l'écoulement du contenu est produit par la force musculaire de l'opérateur au moment de l'utilisation
• F16K 15/02 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés
• B65D 47/20 - Fermetures avec dispositifs de décharge autres que des pompes comportant des éléments fonctionnant à la main pour commander l'évacuation

Abrégé

A suck-back valve selectively actuatable for dispensing liquid in its open condition from an associated liquid storage container, and for avoiding continued presence of excess dispensed liquid about the exit orifice in the closed condition of the valve, is formed at least in part of a spring member and a pin. The spring member includes a distal web that defines a valve seat and a dispensed liquid exit orifice, a proximal web, and a plurality of flexibly elastic bands helically connecting the distal and proximal webs. The pin includes an elongated shaft having a proximal end secured to the proximal web and carrying a substantially hollow frustoconical cone at its distal end. Dispensed liquid remaining proximate the exit orifice is sucked back into the liquid container through the shaft bore as the valve returns from its open to its closed condition under the return urgency of the elastic bands.

Classes IPC  ?

• B65D 47/24 - Fermetures avec dispositifs de décharge autres que des pompes comportant des éléments fonctionnant à la main pour commander l'évacuation avec soupapes
• F16K 1/38 - Corps de soupapes de forme conique
• F16K 23/00 - Clapets pour empêcher le dégouttement des buses