A locking mechanism for use with a coupler assembly for sealing pipe is described herein. The locking mechanism comprises a partially hollow cylindrical body having a first end opposite a second end along a common axis, the body defining a first cord path connecting the first end to a first arcuate opening defined in the body and a second cord path connecting the second end to a second arcuate opening defined in the body, wherein the first cord path and the second cord path comprise separate paths. The locking mechanism further comprising first and second caps that are slidably attachable to the first and second ends of the body, respectively and a cord having a first end portion located within the first cord path and a second end portion located within the second cord path.

A pipe system for transporting liquid. The pipe system connects adjacent pipes and includes a pipe having a coupler cup formed in an end thereof. The coupler cup is configured for receiving an end of a second pipe therein. The pipe system includes a coupler cap adapted to snap onto the coupler cup. The coupler cap also has an opening for receiving the second pipe therethrough to couple the first pipe and the second pipe. A seal is disposed between the coupler cap and the coupler cup to provide a sealed pipe system.

An electrical isolator includes a first fluid-carrying member and a second fluid-carrying member spaced apart from the first fluid-carrying member in an axial direction and a resistive, semi-conductive or non-conductive component located between the first and second fluid-carrying members. The component is adapted to convey fluid flowing from the first fluid-carrying member to the second fluid-carrying member. The isolator also include a first fluid sealing member provided between the first fluid-carrying member and the component, a second fluid sealing member provided between the second fluid-carrying member and the component, and a reinforcing composite encircling the first fluid-carrying member, the second fluid-carrying member and the resistive, semi-conductive or non-conductive component. A a radially inner portion of the component separates the first fluid-carrying member and the second fluid-carrying member by an axial distance. The first and second sealing members are located within the axial distance between the first and second fluid-carrying members.

An electrical isolator comprising: a first fluid-carrying member and a second fluid-carrying member spaced apart from said first fluid-carrying member; a resistive, semi-conductive or non-conductive component located between said first and second fluid-carrying member, wherein said resistive, semi-conductive or non-conductive component is adapted to convey fluid flowing from said first fluid-carrying member to said second fluid-carrying member; wherein said first fluid-carrying member comprises a first annular projection extending radially outwardly, and said second fluid-carrying member comprises a second annular projection extending radially outwardly such that an annular cavity is formed between the first and second annular projections; wherein the electrical isolator further comprises: a layer of circumferentially wound fiber-reinforced polymer in the annular cavity; and a layer of helical wound fiber-reinforced polymer extending over the first annular projection, the annular cavity and the second annular projection.

A device for connecting two tubular pipe elements, including a hollow cylindrical coupling device (4) with a hollow cylindrical first coupling device part (5) arranged on a first pipe element (2), and a hollow cylindrical second coupling device part (6) arranged on the second pipe element (3) that is axially connected to the first pipe element (2), wherein at least one first positive-locking element (7) is arranged on the first coupling device part (5) and at least one second positive-locking element (8) is arranged on the second coupling device part (6). The at least one first positive-locking element (7) arranged on the first coupling device part (5) and the at least one second positive-locking element (6) arranged on the second coupling device part (6) are designed to engage in a positive-locking manner, forming an axial connection of the first coupling device part (5) with the second coupling device part (6).

A pipe coupling or a pipe clamp has an outer clamp band with an outer longitudinal slot, an inner clamp band with an inner longitudinal slot and a tensioning mechanism arranged on the outer clamp band. The inner longitudinal slot is offset in relation to the outer longitudinal slot. A separate flat spanning element is provided on the inner clamp band in order to span the inner longitudinal slot. The spanning element extends from one side of the inner longitudinal slot towards the other side of said longitudinal slot.

A pipe system for transporting liquid. The pipe system connects adjacent pipes and includes a pipe having a coupler cup formed in an end thereof. The coupler cup is configured for receiving and end of a second pipe therein. The pipe system includes a coupler cap adapted to snap onto the coupler cup. The coupler cap also has an opening for receiving the second pipe therethrough to couple the first pipe and the second pipe. A seal is disposed between the coupler cap and the coupler cup to provide a sealed pipe system.

A pipe connector has a tube and two binding rings. The tube is made from a soft material and forms at least one fixing segment on two ends. The two binding rings are mounted on the two ends of the tube respectively. Each binding ring has at least one locating segment. The amount of the at least one locating segment is equal to the amount of the at least one fixing segment of the tube. The at least one fixing segment engages with the at least one locating segment to fix the binding ring and the tube. Thus, a user only needs to expand the tube to mount the tube onto a water pipe instead of heating it. Alternatively, engaging the fixing segment with the locating segment prevents the binding ring from moving relatively to the tube.

A pipe coupling includes first and second coupling segments, an inner surface of each of the first and second coupling segments defining first and second ring grooves, the inner surface of each of the first and second coupling segments including transition portions on either side of the respective ring grooves, each of the first and second ring grooves defining a groove bottom surface positioned radially outward from each of the respective transition portions; a first pipe connection ring disposed within the first ring groove and a second pipe connection ring disposed within the second ring groove, each of the respective pipe connection rings including: an outer flange aligned with an axial direction of the respective pipe connection ring and received within the respective ring groove; and an inner flange connected to the outer flange and angled with respect to the outer flange.

A pipe element coupler includes a plurality of coupling members, a gasket disposed in the coupling members and a fastening element. Each of the coupling members includes two engaging keys at two coupling end portions thereof each having an engaging surface that has varying radiuses of curvature. The fastening element is coupled at the coupling members, wherein the pipe element coupler is adapted for being preassembled on the two pipe elements to align the engaging keys with the corresponding grooves of the pipe elements. When the fastening element is operated to fasten the to coupling members together, each of the engaging surfaces is deformed to change the varying radiuses of curvature, so as to substantially match a radius of curvature of the groove circumference at the bottom of the groove of the pipe element.