Patent attributes
A band coupling for straight line interconnection of flangeless pipes and a built in pipe grip mechanism to resist axial separation forces is provided. The band-clamp coupling comprises an outer housing of cross-section resembling a wide, low-wall channel, the walls thereof facing the center of the pipes, and a low-wall inner channel fitting into the outer channel. The inner channel being provided with spaced-apart inwardly-facing projection adjacent to each of the inner channel walls, each projection having a first sloping side axially facing the line of pipe abutment and a second sloping side axially facing away from the line of pipe abutment. A sloped internally-toothed grip washer is disposed along each of the projection second sides; and a seal member is disposed inside the inner channel and extending along the major portion of the width thereof to abut both the first sides axially facing the line of pipe abutment.
