Fmc Corporation

Exxon Production Research Company

Hydrotech International, Inc.

Claud C Barrington

Charles Edward Jennings

Lien-Yan Chen

Glen E Lochte

Thomas J Ames

Don B Wafer

Bob C Hopkins

John N McIntyre

Alfred P Regitz

Burlie R Bowen

A gate valve includes a pressure relief port located on the gate valve. When the gate is positioned such that the port communicates with one of the two flow passages and the valve body interior, uni-directional flow is permitted from the other of the flow passages. Flow is blocked bi-directionally when the port is positioned out of communication with the flow passage.

Uni-directional/bi-directional gate valve

A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat a eutectic ring assembly for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and a lost motion connection between the valve stem and the valve closure element.

Valve stem-to-bonnet backseat

A pressure insensitive, fail-safe subsea valve is disclosed. The valve is manipulator operable for deep water application and does not require conventional diving techniques to install, maintain or remove. The valve is pressure balanced by employing a hollow valve stem which equalizes the pressure on both ends of the stem.

Pressure insensitive valve

Method and apparatus for breaking concrete from a concrete coated pipe comprising; a frame mounted on the pipe; means supported by the frame for engaging the concrete to break the concrete from the pipe and means for driving the engaging means against the pipe to impart massive forces thereto exceeding the strength of the concrete to thereby break the concrete from the pipe.

Concrete removal tool

Growing community of inventors

Houston, TX, United States of America

Claud C Barrington