Patent ID: 9316322
Filing Date: 2016-04-19
CPC Classification: E21B,F16K

Claim Text:
1. A gate valve, comprising: a valve body having a flow passage with an axis, the flow passage intersecting a cavity in the valve body; a gate movable through the cavity to selectively open and close the flow passage a valve seat positioned parallel to the axis of the flow passage, the valve seat comprising: a tubular body having an annular face contacted by the gate and an end opposite the face in engagement with the valve body; and a sleeve positioned on an inner diameter of the tubular body, the sleeve having an inner edge flush with the face of the tubular body, the sleeve adapted to receive a shear force for shearing a member extending through the flow passage, the sleeve having a deformable section with less axial compressive strength than a remaining portion of the sleeve that is configured to decrease an axial length of the sleeve in response to axial loading of the sleeve by contact with the gate while the gate is shearing the member.