30-08-2018 дата публикации
Номер: US20180243767A1
Принадлежит:
A dispenser () comprises a housing () defining at least three feed channels () and at least one dispensing channel (), a spool valve () with a spool () defining at least four flow passages (), a deformable sealing plug () in at least two () of the feed channels and in sealing orientation with both the housing () and the spool (), and a nipple () in at least the two feed channels () of the housing () comprising the sealing plugs (); wherein the spool () can reversibly rotate between an open orientation and a closed orientation can dispense two-component foam formulations and purges the dispensing channel when in the off position. 110. A dispenser () comprising:{'b': 20', '21', '22', '23', '24', '25', '26, '(a) a housing () with a feed end () and an opposing dispensing end (), the feed end having defined therein at least three feed channels (, and ) and the dispensing end having defined therein at least one dispensing channel ();'}{'b': 30', '31', '32', '33', '34', '31', '32', '33', '34', '31', '32', '33', '34', '38', '38', '38', '38', '100', '100', '100', '100, 'i': a', 'a', 'a', 'a', 'b', 'b', 'b', 'b', 'a', 'b', 'c', 'd', 'a', 'b', 'c', 'd, '(b) a spool valve mounted in the housing between the feed end and dispensing end, the spool valve comprising a spool () with separate first, second and third flow passages (, and ) and a fourth flow passage () that optionally intersects the third flow passage, where the flow passages are defined through the spool and each flow passage has a feed end opening (, , and , respectively) and a dispensing end opening (, , and , respectively), the spool has at least four gasket grooves (, , and ) defined circumferentially around the spool and in each of which a gasket (, , and , respectively) resides so that each gasket presses against the spool and housing to form a seal around the circumference of the spool with a gasket groove defined on each side of the feed end opening and dispensing end opening of each of the four flow passages ...
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