Abstract: A multilayer annular clamp including a plurality of sealing rings radially spaced from one another, at least two of the sealing rings including L-shaped axial-plane cross-sections nested in one another, an innermost one of the sealing rings being operative to contact an outer contour of the pipe, two clamp members disposed around a portion of the sealing rings, and a fastener, including a shank, operative to fasten the clamp members towards each other in a direction along the shank so as to apply a radially-inward clamping force on the innermost sealing ring that contacts the pipe so that the multilayer annular clamp clamps the pipe.

Abstract: A clamp assembly including a curved resilient band terminating in a radial direction in two clamp members and in an axial direction in two end faces that are bent radially inwards, the resilient band being adapted to receive therein an elastomeric seal that contacts an outer contour of a pipe, wherein the end faces are formed with a plurality of notches, each of the notches having an open end facing radially inwards and a closed end opposite to the open end, the closed end being wider than the open end.

Abstract: A pipe coupling including at least one annular clamp housing at an end of a body, the at least one annular clamp housing having an opening for inserting therein a pipe and including clamp members and a tightening element that fastens and tightens the clamp members towards each other in a direction transverse to an axial length of the body so as to apply a radially-inward clamping force on a pipe inserted in the opening, at least one auxiliary clamp including auxiliary clamp members located near the at least one annular clamp housing, and an auxiliary tightening element that fastens and tightens the auxiliary clamp members towards each other in a direction transverse to the axial length of the body so as to apply a radially-inward clamping force on the pipe inserted in the opening.

Abstract: A pipe coupling including an annular clamp having an opening at least one end of its axial length for inserting therein a pipe, the annular clamp including two clamp members, an annular inclined surface extending axially from each of the clamp members, a wedge-shaped gripper arranged for sliding and abutting against the annular inclined surface, and a fastener that fastens the clamp members towards each other in a direction transverse to the axial length so as to apply a radially-inward clamping force on the pipe inserted in the opening and a radially-inward clamping force on the annular inclined surface that moves and wedges the wedge-shaped gripper in an axial direction between the annular inclined surface and the pipe.

Abstract: A grip element comprising a wedge-like structure supporting a metal plate, the exposed outer surface thereof being provided with an array of large and small gripping teeth. The large teeth project from the surface of said metal plate further than said small teeth. The invention further provides a grip element having a floor. The grip elements may be disposed around a ring for the purpose of pipe gripping. The ring is particularly useful in a pipe coupling to grip metal and plastic pipes.

Abstract: The invention relates to external sealing of pipe joints. The invention provides a wide seal strip useful in combination with a coupling for pipes, the length, and hence the diameter of the seal strip being adjustable also on site. The invention provides a pipe clamp flexible seal strip adaptable to be easily shortened by the user to a required length. The seal strip being configured for use inside a pipe coupling, and having at least one narrow dividing cut which extends across the width of the seal to almost completely divide a major portion of the strip length from a minor portion thereof. The minor portion remaining connected to the major portion by at least one bridge member which can easily be severed on site for removal and disposal of the minor portion.

Abstract: 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.

Abstract: An improved static seal element, sometimes referred to as a gasket, which maintains contact with a pipe and a flange during and after seal compression, such seal being particularly useful in a removable pipe coupling. The improved elastomer static seal element is for the prevention of leakage from between two pipes to be connected end to end, a flange being provided to contact the element, and being at least partially contained in a sheet metal housing which is arranged to apply diametric pressure to seal the element against the outer surface of one of the pipes and against the flange, the improvement being the addition of a stabilizer and seal lip projecting beyond the outer diameter of the seal element to maintain the seal in position against the metal housing vis-à-vis the flange of the center component.