Beer keg

Claim 2

A container for beer comprising a keg having unitarily continuous top, bottom and side walls of plastic defining a keg chamber, one of said walls having an opening therethrough that opens into the keg chamber and exterior and interior surfaces surrounding the opening, a mounting member mounted by the one wall to extend through the wall opening and having a central opening therethrough, said mounting member having a first annular flange extending through and outwardly of the wall opening and extending in close fitting relationship with the wall portion defining said opening, a second annular flange having an outer diameter substantially larger than the maximum outer diameter of the first flange, joined to the first flange and bearing against the wall interior surface, and a tooth joined to the second flange and protruding into the wall portion, and a retainer ring mounted on the second flange and bearing against the wall exterior surface to clamp the wall portion between said ring and first flange.

Claim 3

The apparatus of claim 1 further characterized in that the first flange extends axially away from the second flange, that the second flange has a surface portion adjacent the wall inner surface and that the tooth extends axially relative the second flange in the same direction as the first flange to a position more closely adjacent the retainer ring than the second flange surface portion.

Claim 4

The apparatus of claim 2 further characterized in that the tooth in cross section in a plane parallel to the central axis of the first flange is substantially triangular and has a terminal apex more closely adjacent the retainer ring than the second flange.

Claim 5

The apparatus of claim 2 further characterized in that there are provided a plurality of teeth joined to said second flange, said teeth being angularly spaced and extending radially relative the first flange.

Claim 6

The apparatus of claim 2 further characterized in that said tooth extends annularly and is of a substantially larger radius of curvature than the maximum diameter of the first flange.

Claim 7

The apparatus of claim 5 further characterized in that the second flange surface portion is annular and extends between the tooth and the first flange.

Claim 8

The apparatus of claim 6 further characterized in that the second flange surface portion bears against the wall interior surface.

Claim 9

The apparatus of claim 6 further characterized in that a gasket is provided between the second flange surface portion and the keg wall inner surface, the axial height of the first flange being substantially greater than the tooth.

Claim 10

The apparatus of claim 6 further characterized in that the retainer ring has an annular tooth and an annular surface surrounded by the ring tooth that bears against the wall exterior surface, said ring tooth extending more closely adjacent the second flange than the ring annular surface.

Claim 11

The apparatus of claim 9 further characterized in that the retainer ring has a second annular surface surrounding the tooth, said ring annular surfaces being generally coplanar, the outer diameter of the second annular surface being substantially larger than the outer diameter of the second flange.

Claim 12

A container for beer comprising a keg having integrally joined top, bottom and side walls defining a keg chamber, said walls being made of unitary formed plastic, said side wall having a portion defining a plug mounting member opening and said top wall having a portion defining a tapper plug mounting member opening, a filler plug mounting member mounted in the side wall opening by said side wall portion, and a tapper plug mounting member mounted in said top wall opening in adhered relationship to the top wall portion, said filler plug mounting member having a first annular flange that has an annular surface bearing against the inner surface of the side wall, the first annular flange having an outer diameter greater than the side wall opening, and a second annular flange integrally joined to the first flange to extend outwardly through the side wall opening and having external threads, and a retainer nut threaded on the second flange to bear against the outer surface of the side wall, the first flange having a flat surface portion and a tooth extending axially relative the flat surface portion to a position more closely adjacent the nut than the flat surface portion.

Claim 13

A container for beer comprising a keg having integrally joined top, bottom and side walls defining a keg chamber, said walls being made of unitary formed plastic, said side wall having a portion defining a plug mounting member opening and said top wall having a portion defining a tapper plug mounting member opening, a filler plug mounting member mounted in the side wall opening by said side wall portion, and a tapper plug mounting member mounted in said top wall opening in adhered relationship to the top wall portion, said filler plug mounting member having a first annular flange that has an annular surface bearing against the inner surface of the side wall, the first annular flange having an outer diameter greater than the side wall opening, and a second annular flange integrally joined to the first flange to extend outwardly through the side wall opening and having external threads, and a retainer nut threaded on the second flange to bear against the outer surface of the side wall, the first flange having a flat surface portion and a tooth extending axially relative the flat surface portion to a position more closely adjacent the nut than the flat surface portion.

Claim 14

A container for beer comprising a keg having unitarily continuous top, bottom and side walls of plastic defining a keg chamber, one of said walls having an opening therethrough that opens into the keg chamber and exterior and interior surfaces surrounding the opening, a mounting member mounted by the one wall to extend through the wall opening and having a central opening therethrough, said mounting member having a first annular flange extending through and outwardly of the wall opening and extending in close fitting relationship with the wall portion defining said opening, a second annular flange having an outer diameter substantially larger than the maximum outer diameter of the first flange, joined to the first flange and bearing against the wall interior surface, and a retainer ring mounted on the first flange and bearing against the wall exterior surface to clamp the wall portion between said ring and second flange, said ring having AN annular tooth and an annular surface surrounded by the ring tooth that bears against the wall exterior surface, said tooth extending more closely adjacent the second flange than the ring annular surface.

Claim 15

A container for beer comprising a keg having unitarily continuous top, bottom and side walls of plastic defining a keg chamber, one of said walls having an opening therethrough that opens into the keg chamber and exterior and interior surfaces surrounding the opening, a mounting member mounted by the one wall to extend through the wall opening and having a central opening therethrough, said mounting member having a first annular flange extending through and outwardly of the wall opening and extending in close fitting relationship with the wall portion defining said opening, a second annular flange having an outer diameter substantially larger than the maximum outer diameter of the first flange, joined to the first flange and bearing against the wall interior surface, and a retainer ring mounted on the first flange and bearing against the wall exterior surface to clamp the wall portion between said ring and second flange, said ring having AN annular tooth and an annular surface surrounded by the ring tooth that bears against the wall exterior surface, said tooth extending more closely adjacent the second flange than the ring annular surface.

Claim 16

The container of claim 12 further characterized in that the tooth has an apex edge remote from the annular surface.

Claim 17

The container of claim 12 further characterized in that said first flange and ring have threaded portions forming a mating fit.