Patent ID: 9644742
Date: 2017-05-09
CPC Classifications: F16J,F16K

Claim:
1. A two-stage seal for forming a static lateral seal and a dynamic lateral seal along a sliding interface between a first sealing surface and a second sealing surface in a pressurized process line, the seal comprising: a body defining a dynamic seal member and a static seal member, wherein each of the dynamic seal member and the static seal member is arranged to sealingly engage the first sealing surface, the first surface arranged to shift in relation to the body, wherein the body has a profile comprising a base member, wherein the dynamic seal member extends from the base member in a first direction, and wherein the static seal member extends laterally from the base member in a second direction; and a spring member carried by the body, wherein the spring member is encased within the base member; wherein the dynamic seal member is arranged to form a dynamic seal with the first sealing surface; wherein the static seal member is arranged to form a static seal with the first sealing surface in response to an increased pressure in the pressurized process line and is arranged to release the static seal; and wherein the dynamic seal member functions substantially independently of the static seal member.