Spout for a flexible bag and flexible bag having a spout

A fitment comprising:

• a spout member having a base flange and a cylindrical upstand extending from the base flange, the base flange structurally configured to sealingly engage about an opening of a bag, the cylindrical upstand terminating at a distal end;
• an insert member slidably positionable within the spout member, the insert member having a bottom end and a top end, the top end terminating in a plurality of flexible tabs, and with the top end being slidably positionable within the cylindrical upstand of the spout member, the insert member having a valve assembly, the valve assembly including:
• a first portion fixedly coupled to the insert member, the first portion having a base with an upper surface and a lower surface, a central bore extending therethrough and at least one opening extending therethrough, and, a lower circumferential depending skirt extending away from the lower surface of the base and encircling the at least one opening and central bore, the lower circumferential depending skirt having an inner surface and terminating at a lower edge, a seal surface positioned on the inner surface of the lower circumferential depending skirt;
• a second portion slidably movable relative to the first portion, the second portion including a body with a central post extending upwardly from the body and into the central bore, with a depending outer rim extending about the body and including a sealing surface disposed thereon, the second portion slidably positionable between a sealing configuration wherein the seal surface of the first portion sealingly engages with the sealing surface of the second portion, to preclude the passage of fluid across the second portion and through the at least one opening of the first portion and an open configuration wherein the sealing surface is spaced apart from the seal surface;
• and
• a spring member having a central body member, an outer circumferential ring member and a biasing member extending therebetween, the outer circumferential ring member fixedly coupled to the insert member with the central body radially inwardly spaced therefrom, the central body having a top surface engageable with the second portion, and the biasing member including at least one opening, the biasing member biasing the second portion into a sealing configuration, whereupon overcoming the biasing member places the second portion into an open configuration,
• wherein the biasing member defines a hoop-like member that is concave in an upward direction toward the second portion;
• wherein the biasing member includes an annular inflection ring spaced apart from an inner end and an outer end thereof, with an inner portion between the inner end and the annular inflection ring extending in a direction away from the second portion to the annular inflection ring, and with an outer portion between the outer end and the annular inflection ring extending in a direction toward the first portion and away from the annular inflection ring;
• and
• wherein the outer portion of the biasing member further includes an annular stop member protruding from a lower surface of the outer portion and spaced apart from the annular inflection ring and from the outer circumferential ring, with the annular stop member configured to interface with the outer circumferential ring member spaced apart from the biasing member toward the bottom edge of the outer circumferential ring to preclude further relative movement therebetween in a first direction.