Rectorseal, LLC

Dj Technologies, Inc.

Jianmin Li

Henry J Gohlke

Steven X Johnson

Larry Dugan

In some embodiments, apparatus for releasably gripping at least one elongated item and being used in pulling the elongated item(s) through at least one space includes a body and at least three gripping members associated with the body. The gripping members are moveable relative to the body and capable of engaging at least one elongated item.

Apparatus and methods for gripping an elongated item

In some embodiments, apparatus for releasably gripping at least one elongated item and being used in pulling the elongated item(s) through at least one space includes a body and a plurality of gripping members associated with the body. The gripping members are moveable relative to the body and capable of engaging at least one elongated item.

Disclosed is a coupler that grips the internal surface of a torque receptor such as a pipe or driveshaft to be turned. When torque is applied to the coupler, one or more gripping surfaces are forced apart by a cam mechanism. The gripping surfaces tightly engage the internal surface of the pipe in response to movement of an internal cam. Torque applied to the wrench causes the pipe to turn. Because the wrench grips the internal diameter of a torque receptor, it can be used without damaging the external surface of the torque receptor, and used in very confined spaces. The gripping surfaces distribute the gripping load evenly across the pipe, which minimizes any deformation of the pipe. The pipe is engaged by the gripping surfaces beyond the threaded portion of the pipe, where the pipe has more structure, to prevent ovaling.

Growing community of inventors

Houston, TX, United States of America

Jianmin Li