Device for supplying pressurized fluid, including a first valve housing an internal fluid circuit, the device including a second valve having an internal circuit and forming a physical entity distinct from the first valve. The first and the second valve including respective coupling members forming a detachable male/female quick-connection system for the second valve on the first valve. The two valves being configured such as to place their internal circuits in communication when the second valve is coupled to the first valve via the quick-connection system.

A coupling may be configured to receive and secure an insertion end of a conduit. An outer surface of the insertion end of the conduit may be smooth and free of grooves, flanges and beads. A first member of the coupling may define a first passageway. A second member of the coupling may define a second passageway. The first member may be in engagement with the second member. A gripping ring having an inner edge defining a series of teeth may be disposed within the second member. A support ring and O-ring may also be disposed within the second member.

A connector system for use during hydraulic fracturing operations includes a first connector having a bore and an annular interface defined by a plurality of surfaces disposed at selected angles with respect to each other. A second connector has an annular interface defined by a plurality of surfaces disposed at selected angles to each other. The plurality of surfaces of the annular interface of the first connector are adapted to engage the plurality of surfaces of the annular interface of the second connector to form a seal.

A water delivery device includes a first conduit section and a second conduit section rotatably coupled to the first conduit section by a magnetic joint. The magnetic joint includes a plurality of magnets that cooperatively define a plurality of rotational positions between the first conduit section and the second conduit section.

A pipe unit coupling structure includes a first member in which a first hole is formed, a second member including a pipe unit which is coupled to the first member by being inserted into the first hole, and a third member coupled to the second member by a coupling unit. The second member has an inclined surface formed at a tip of the pipe unit. The inclined surface is configured in such a manner that, when the inclined surface is pressed against the first member when the pipe unit of the second member is inserted into the first hole of the first member in a state where the second member and the third member are coupled to each other, a force is applied from the second member to the third member at the coupling unit, in a direction opposite to a direction of separation of the second member.

A coupling that includes a female coupling member having at least one electrically conductive ring on an inner mating surface; a male coupling member having at least one electrically conductive ring on an outer mating surface, the outer mating surface sized to fit within the inner mating surface of the female coupling member; and wherein when the male coupling member is inserted into the female coupling member, alignment of the at least one electrically conductive ring of the female coupling member with the at least one electrically conductive ring of the male coupling member indicates whether the female coupling member and the male coupling member are fully engaged.

A coupling that includes a female coupling member having at least one electrically conductive ring on an inner mating surface; a male coupling member having at least one electrically conductive ring on an outer mating surface, the outer mating surface sized to fit within the inner mating surface of the female coupling member; and wherein when the male coupling member is inserted into the female coupling member, alignment of the at least one electrically conductive ring of the female coupling member with the at least one electrically conductive ring of the male coupling member indicates whether the female coupling member and the male coupling member are fully engaged.

Connector assemblies including a first subassembly having a recessed portion and a pair of locator tracks and a second subassembly having a pair of locator projections, vacuum assemblies including these connector assemblies, and methods of using the same are provided herein.

The invention relates to a connector socket for connecting a spigot (12) to an orifice (10a), said connector socket including a sheet metal plate (10) with said orifice (10a) and a protruding collar structure (16) surrounding said or-ifice (10a). 10 It is proposed that the collar structure (16) is integrally made of the sheet metal of said sheet metal plate (10) by a sheet metal forming process.

Connector assemblies including a first subassembly having a recessed portion and a pair of locator tracks and a second subassembly having a pair of locator projections, vacuum assemblies including these connector assemblies, and methods of using the same are provided herein.