PERFECTED PIPE COUPLING WITH BUILT-IN GRIPPER Russian patent published in 2012 - IPC F16L21/02 

FIELD: machine building.

SUBSTANCE: split band clamping coupling comprises central case with cross-section shaped to low-wall wide channel bent so that its diameter exceeds pipe OD, and two curved outer clamping elements to allow contact with case wall and retention of O-ring and skewed mechanical gripping ring. Two, in fact parallel, clamps are arranged nearby the ends of curved outer clamping elements. Said skewed mechanical gripping ring with inner teeth comprises multiple spaced apart wedge gripping elements each being jointed with two adjacent gripping elements by flexible element to make gripping ring. Screw clamp stays in contact with clamping ledges to reduce distance between, in fact, parallel clamping ledges.

EFFECT: higher reliability of joint.

7 cl, 8 dwg