Abstract: A multilayer annular seal assembly including at least one outer sealing ring including at least one inner annular space and at least one inner sealing ring formed with one or more inner annular chambers.

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 includes an annular clamp housing that has ends which are provided with two opposing clamp members. One or more tightening elements are provided for tightening the clamp members towards each other in a direction transverse to an axial length of the annular clamp housing so as to apply a radially-inward clamping force on a pipe being clamped in the annular clamp housing. An annular seal is mounted in the annular clamp housing. The annular clamp housing includes one or more enhanced circumferential stiffening elements.

Abstract: An improved clamp assembly that has two adjacent annular clamps and the user has the choice of tightening just one of them or both of them.

Abstract: A seal pressing device for a pipe coupling including a sealing member having an axial length and an outer curved contour pressable against an inner diameter of a seal, the sealing member having an axial row of mounting apertures for receiving therein mechanical fasteners, and at least one winged extension extending from an end of the sealing member bent inwards from the outer curved contour of the sealing member.

Abstract: A method for making a gasket including molding an elastomeric material in a mold to form a gasket that includes an outer portion folded over an inner portion so as to define an inner annular space between and bounded by the outer and inner portions, and wherein one or more apertures are formed in a side wall of the gasket, which are in fluid communication with the inner annular space.

Abstract: A pipe coupling includes an annular clamp housing that has ends which are provided with two opposing clamp members. One or more tightening elements are provided for tightening the clamp members towards each other in a direction transverse to an axial length of the annular clamp housing so as to apply a radially-inward clamping force on a pipe being clamped in the annular clamp housing. An annular seal is mounted in the annular clamp housing. The annular clamp housing includes one or more enhanced circumferential stiffening elements.

Abstract: An accessory for a clamp assembly including a clamp bridge including a plurality of curved bridge elements attached to one another by a joint that permits relative motion between neighboring bridge elements.

Abstract: An improved clamp assembly that has two adjacent annular clamps and the user has the choice of tightening just one of them or both of them. A bridge element is provided that presses against one or more sealing rings when tightening the annular clamp.

Abstract: A pipe coupling seal including a cylindrical elastomeric seal (10) including annular pad portions (14, 16) axially spaced apart from one another and extending from a bridge portion (18), each of the pad portions (14, 16) being thicker than the bridge portion (18) and adapted to seal against an outer diameter of a pipe, wherein at least one of the pad portions (14, 16) includes a removable section that includes a continuously enclosed annular hollow void (34).

Abstract: A method for making a gasket including molding an elastomeric material in a mold to form a gasket that includes an outer portion folded over an inner portion so as to define an inner annular space between and bounded by the outer and inner portions, and wherein one or more apertures are formed in a side wall of the gasket, which are in fluid communication with the inner annular space.

Abstract: A pipe coupling includes an annular clamp housing that has ends which are provided with two opposing clamp members. One or more tightening elements tighten the clamp members towards each other in a direction transverse to an axial length of the annular clamp housing so as to apply a radially-inward clamping force on a pipe being clamped in the annular clamp housing. An annular seal is mounted in a tightening chamber with borders defined by inner walls of the annular clamp housing and an inner abutment. The tightening chamber has a single annular opening that faces radially inwards. Upon sufficient tightening of the one or more tightening elements, the annular seal cannot expand against the borders of the tightening chamber and can only expand radially inwards through the single annular opening.

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: An accessory for a clamp assembly including a clamp bridge including a plurality of curved bridge elements attached to one another by a joint that permits relative motion between neighboring bridge elements.

Abstract: A pipe coupling including an annular clamp having an opening at at least one end of its axial length for inserting therein a pipe, the annular clamp including two clamp members, an annular seal disposed in the annular clamp, and a mechanical fastener that includes a threaded shaft with a washer flange, the washer flange having a lower rim, wherein when nuts are tightened on both ends of the threaded shaft, the lower rim bites into the annular seal.

Abstract: A multilayer annular seal assembly including at least one outer sealing ring including at least one inner annular space and at least one inner sealing ring formed with one or more inner annular chambers.

Abstract: A pipe clamp including an annular clamp housing having an opening for inserting therein a pipe, opposing clamp members located near ends of the annular clamp housing, one or more tightening elements for fastening and tightening the clamp members towards each other in a direction transverse to an axial length of the annular clamp housing, and an annular seal placed in an inner perimeter of the annular clamp housing, wherein one portion of the annular seal is attached to the annular clamp housing with one or more mechanical fasteners and another portion of the annular seal is slidingly attached to the annular clamp housing with one or more mechanical fasteners so that the annular seal is permitted to move and expand radially about as the pipe clamp is tightened by one or more tightening elements.

Abstract: An improved clamp assembly that has two adjacent annular clamps and the user has the choice of tightening just one of them or both of them. A bridge element is provided that presses against one or more sealing rings when tightening the annular clamp.

Abstract: A pipe clamp assembly including a band having an inner annular seal element wrappable around a pipe, opposing clamp members extending from the band, tightening elements for clamping together the clamp members, the tightening elements passing through holders located at ends of the clamp members, and a keeper fastened to one of the holders at a first end of at least one of the tightening elements, the keeper having a cover portion that lies over the first end.