Patent ID: 8561639

Claim:
A valve assembly, comprising: a substantially cylindrical-shaped main body component having an inner wall defining a cavity extending axially through the main body component, with the inner wall further having a ridge element extending radially inwardly therefrom; a substantially cylindrical-shaped chamber body component having an inner wall defining a cavity extending axially through the chamber body component, with the chamber body component having an outer wall that is slidably engageable with the ridge element; a fluid control plate secured within a first end of the main body component; and a chamber cap slidably engageable with the inner wall of the main body component and secured to the outer wall of the chamber body component, wherein the ridge element includes a radially inner wall, a radially intermediate wall, a chamber body engaging face and a radially inner side wall, wherein the chamber body outer wall is slidably engageable with the radially inner wall, and wherein the radially intermediate wall face and the radially inner side wall form a positive displacement cavity.