A grooved-ended resilient expansion joint is disclosed. The expansion joint has a resilient expansion member with a central resilient portion and two resilient axially disposed cylindrical ends. Each cylindrical end has a radially outwardly raised distal cylindrical gasket portion with at least one inside shoulder having an inner diameter sized substantially the same as an outer diameter of a pipe to be joined. Each cylindrical end also has a neck portion between the central portion and the gasket portion that is sized to receive a grooved-ended pipe nipple.

Disclosed herein are air intake assemblies for internal combustion engines. In some embodiments, an air intake assembly includes an air filter configured to produce filtered air, a sealed filter housing configured to house the air filter therein, and an intake tube configured to convey the filtered air to an internal combustion engine. The filter housing includes an air intake port configured to provide intake air to the air filter. The air filter is configured to remove particulate matter from the intake air and produce the filtered air, The air filter includes a multi-component coupling interface configured to accept an intake-end portion of the intake tube in the coupling interface. The filter housing includes an aperture configured to accept the coupling interlace of the air filter in the aperture. Also disclosed herein are methods of the air intake assemblies.

A coupler having at least one protective bumper is provided. The protective bumper is located on the exterior surface of the side of a movable sleeve of a coupler. The sleeve moves with respect to a main body of the coupler to lock or release a mating plug. A second sleeve of the coupler may also have protective bands. The protective bumpers and bands protect the coupler from damage as might otherwise occur from external forces acting upon it during use. Preferably, the diameters of the plurality of bumpers decreases the closer to the distal end of the sleeve the bumpers are located.

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.

A fiber reinforced polymer composite joining member for joining sections of pipe together to form an elongated pipe is disclosed. A pipe joint and elongated pipe includes at least two pipe sections having ends that are joined together with the joining member is also disclosed. The pipe joint and elongated pipe are formed by joining abutting ends of adjacent pipe sections with the joining member without the need for the adjacent pipe sections to have other connection means, such as standard bell and spigot end connections. Also provided is a method for joining pipe sections with the joining member to make an elongated pipe.

A downpipe fitting for coupling between top and bottom ends of a downpipe. The downpipe fitting includes two parts connected together and rotatable relative to one another about a longitudinal axis thereof. The first part has an inlet, sized and shaped to couple with an outlet of a first section of the downpipe, above the downpipe fitting. The second part has an outlet which is sized and shaped to couple with an inlet of a second section of the downpipe, below the downpipe fitting. The inlet and outlet of the fitting define a flow path for rainwater therethrough. Rotation of the second section of downpipe below the downpipe fitting, about the longitudinal axis, is decoupled from the first section of downpipe above the downpipe fitting.

A pipe coupling apparatus includes a flexible tubular body portion having a body portion a plurality of annular flanges projecting radially outward from the body portion and defining a plurality of annular recesses around the body portion. The body portion can be radially compressed at each end to different degrees, thereby allowing pipes with different diameters to be coupled. The body portion includes a plurality of rods disposed within the material of the body portion. When the ends of the body portion are compressed at different amounts, an intermediate portion of the body portion is tapered, and the rods bend. Clamp bands may be retained within the recesses and may provide the clamping force to radially compress the ends of the body portion to the desired amount.

The embodiments of the present disclosure provide an in-line surface drain. The in-line surface drain may comprise a cylindrical frame and a plurality of concentric rings coupled to the cylindrical frame. The plurality of concentric rings may be configured to protrude outward from a bottom external surface of the cylindrical frame, and the diameters of the plurality of concentric rings may be different. At least one of the plurality of concentric rings may be configured to detachably accommodate a riser pipe.

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 coupling assembly for connecting pipes, and a manufacturing method is disclosed. The coupling assembly can be installed in a state in which couplers are temporarily assembled using coupling members, and does not deform during a coupling process and thus can be stably fixed even after being coupled. The coupling assembly includes two or more couplers which are arranged facing each other to connect pipes continuously disposed in the axial direction, and the pipes are connected to each other in a state which coupling members are temporarily assembled to the couplers. The couplers have catch parts inserted into coupling grooves and have inner diameters corresponding to the outer diameters of the coupling grooves. Interference preventing grooves are formed in both sides of the catch parts and prevent interference between the pipes and the catch parts allowing outer circumferential surfaces of the pipes to pass through between the temporarily assembled couplers.