A coupling for joining pipe elements has segments surrounding a central space with cusps which engage lobes of a seal to maintain the segments in spaced apart relation in a preassembled state. While the coupling is in the preassembled state the pipe elements may be inserted into the central space without disassembling the coupling, and portions of the seal adjacent to attachment members on the segments seat within a channel defined by the segments between the cusps. When the seal is compressed between the segments and the pipe elements to form a joint the seal deforms so as to withdraw a center leg of the seal from the flow path defined within the pipe elements.

A flexible hose adapter configured for engagement with a coupling can comprise an end piece, the end piece defining an inner end and an outer end, the end piece defining an axis, the end piece defining a sealing surface and a raised lip, the raised lip defined between the inner end and the sealing surface; a flexible hose attached to the outer end of the end piece; and a socket end piece attached to the flexible hose opposite from the end piece.

A hose coupler optimally configured for use with a liquid manure drag hose has a pair of hose coupler ends that are joined using a hose coupler having minimal protrusions and diameter. Each of the hose coupler ends is provided with a plurality of ribs and grooves. These ribs and grooves are arranged to mate with corresponding grooves and ribs formed in a collar. For each hose coupler end, a pair of collars are preferably used to secure a hose thereto. The ribs and grooves are preferably configured to secure the hose and distribute tension applied to the hose throughout the coupler end, while ensuring that the hose wall integrity is maintained. The resulting coupler is compatible with heavier drag hose, will not interfere with or harm the hose during winding and unreeling, and will produce less drag and be less likely to produce interference with obstacles in the field.

A clamp assembly, for mounting around a tool joint coaxially joining cylindrical upper and lower workpieces, comprises an upper collar assembly and a lower collar assembly, each having semi-cylindrical left and right collar segments. The left and right collar segments of each collar assembly are removably connectable to each other by threaded fasteners to form the collar assembly. The upper and lower collar assemblies are coaxially mountable around the upper and lower workpieces, respectively, such that tightening the fasteners will urge the upper and lower collar assemblies to grip the upper and lower workpieces, respectively, and thus to provide increased resistance to relative rotation between the two workpieces about the tool joint axis. The upper and lower left collar segments, and/or the upper and lower right collar segments, may be interlockingly and radially slidable relative to each other to accommodate differences between the outside diameters of the two workpieces.

A fire suppression sprinkler adapted to receive arcuate surfaces of a grooved coupling is retainable to the coupling in a pre-assembled state. The coupling joins the sprinkler in facing axial end-to-end relation directly to grooved pipe. The sprinkler has a monolithic body which defines a bore having an inlet and an outlet. A groove, positioned between the inlet and the outlet extends around the body. A gap between the inlet and the grooved pipe to ensure the sprinkler and the pipe are joined by the coupling spaced apart in facing end-to-end relationship.

A pre-assembled pipe coupling includes a gasket, a housing surrounding the gasket, and a fastener. The housing has three segments sequentially coupled to each other to define an insertion boundary. A first segment includes a first mount extending lateral in a first direction from the wall and having a plurality of first lateral walls that define a first aperture, and a second mount extending laterally in a second direction from the wall, the second mount having a plurality of second lateral walls that define a second aperture. A second segment includes a first hook disposed in the first aperture and a first tab defining a first fastener aperture. A third segment includes a second hook disposed in the second aperture and a second tab defining a second fastener aperture. The fastener is disposed through the first fastener aperture and the second fastener aperture.

A coupling segment includes an arcuate segment body defining a first end and a second end opposite the first end; a first shoulder that is formed proximate to the first end and comprises a first fastener pad extending outwardly from the arcuate segment body, the first shoulder further defining an interior edge; and a first pivot extending from the first shoulder at the interior edge, wherein the first pivot is cast monolithically with the arcuate segment body and the first shoulder.

Provided are a highly durable and compact gate valve and a method of installing the gate valve. The gate valve includes a valve cage 12 accommodating a valve body and a sealing band 13 covering between a pair of fluid pipes W and the valve cage 12 under a sealed state. The valve cage 12 includes a pair of protruding tubular portion 12B protruding in a pipe axis direction X from a valve cage body. The sealing band 13 includes a pair of main body portions B1 covering the respective fluid pipes W1, W2 and the protruding tubular portions 12B under a sealed state and a connecting portion B3 connecting the pair of main body portions B1 and formed unitarily therewith and is constituted of a plurality of split members Ba split in a circumferential direction of the fluid pipes W.

A pipe coupling segment includes an arcuate body portion defining a first end, a second end opposite the first end, a first axial side, and a second axial side opposite the first axial side; a hook extending from the first end of the arcuate body portion, wherein the hook defines a shank portion and a bend portion, the shank portion extending in a substantially radially outward direction from the arcuate body portion and the bend portion extending in a substantially axial direction from the shank portion, the bend portion defining an upper engagement surface, the upper engagement surface defining a sloped portion angled rearwardly towards the shank portion; and a fastener lug extending from the second end of the arcuate body portion.

A coupling sized for use with a pipe having a pipe outer diameter, the coupling including a pair of segments; and a gasket positioned between the pair of segments, the gasket including an annular body; and a pair of sealing ribs each extending substantially radially inwardly from the annular body, each sealing rib of the pair of sealing ribs defining a cylindrical sealing surface at an innermost radial extent in an uncompressed state, the cylindrical sealing surfaces each defining an inner gasket diameter that is larger than the pipe outer diameter when the gasket is in the uncompressed state.