It is, therefore, an object of the present invention to provide a seal for use in a positive displacement meter seals. The seal includes three or more legs formed as a geometric frame arrangement, wherein eachleg includes a first, second, third, and fourth side. The fourth side includes a raised portion extending therefrom having a substantially arcuate-shaped cross section.

The raised portion extends continuously along the fourth side of each respective leg. The first, second, and third sides of each respective leg are substantially flat. The raised portion is situated in a substantially central portion of thefourth side of each respective leg to form a ledge thereon.

A positive displacement water meter includes a measuring chamber having an outlet port defined therein, wherein the outlet port includes a channel defined around the outlet port. The positive displacement water meter also includes a seal havinga planar surface and a curved surface, wherein the planar surface is substantially parallel to the curved surface, and the planar surface is situated within the channel. The positive displacement water meter further includes a meter casing having anoutlet port defined therein, wherein the meter casing receives the measuring chamber therein such that the outlet port of the measuring chamber is substantially aligned with the outlet port of the meter casing. The curved surface of the seal abuts aperiphery of the outlet port of the meter casing forming a seal therewith. Due to the substantially arcuate cross section, the seal is adapted to resist the dislodging thereof from the channel during assembly of the positive displacement water meter.

These and other advantages of the present invention will be understood from the description of the preferred embodiments, taken with the accompanying drawings, wherein like reference numerals represent like elements throughout.