Embodiments of the present disclosure provide systems and methods for an air valve and an air valve adapter. The air valve may comprise a base, a top attached to the base via a hinge, a tab connected to the top, and a gripping shape disposed at an end of the tab, wherein the gripping shape is disposed within a well of the base. The base may be attached to an inflatable apparatus via a weld or an adhesive. The air valve adapter may comprise an inserting end, a hollow end, a gripping section between the inserting end and the hollow end, and an aperture in the gripping section, wherein air may supplied in the inserting end to travel to the hollow end.

In the transportation of hydrogen using pipelines, existing oil and natural gas pipelines can be retrofitted with inner tubes defining an inter-space between the outer surface of the inner tubes and the pipelines, and providing a fluid at in the inter-space at a higher pressure than that of the hydrogen in carried in inner tube.

A cover for a connector, wherein the cover is adapted to be locateable over at least a portion of the connector, and wherein the connector has a fluid pathway formed therethrough. The connector has a first portion and a second portion, and wherein, when the cover is located over the portion of the connector, ingress of impurities into the fluid pathway is prevented.

Provided is a connection mechanism between a valve and a joint is configured to connect a tube through the joint 1 to a housing 2 of the valve in air piping. The housing 2 of the valve includes a connection hole 22 for accommodating and connecting the joint 1. A tubular part 21 configured to attach a front end part of the tube thereto is formed inside the connection hole 22. The joint 1 includes a tube seal 11, a back ring 13 with a lock ring 12 including a claw 121 for preventing disengagement of the tube, a release ring 14, and a tubular cap 15. The joint 1 is configured to be press-inserted into the connection hole of the housing 2.

A movable holder includes a showerhead seat assembly; a mounting frame having a first receiving groove, the showerhead seat assembly being rotatably mounted on the mounting frame, a mating boss being provided on the mounting frame, and a locking member being mounted on the mating boss; a transmission seat movably mounted in the first receiving groove, a limiting structure being provided between the mounting frame and the transmission seat; and a damping member sleeved with the transmission seat by an interference fit and in a relatively rotatable manner and rotated synchronously with the showerhead seat assembly, an elastic member being pressed between the damping member and the showerhead seat assembly. The transmission seat is configured to drive, along with the rotation of the damping member, the locking member to move between a locked position and an unlocked position. A shower assembly includes the movable holder.

A coupling for coupling one or more hoses to a cleaning machine including at least one connector for the connecting of a hose to be cleaned with a pillar and at least one pillar for the connection of the connector with a cleaning machine, wherein the pillar includes a longitudinal hollow body with at least two open ends including; a longitudinal guidance part, situated towards a first end; and a second end opposite to the first end in longitudinal direction; wherein the guidance part is provided with a thickening for the fixing of the connector to the guidance part, which thickening includes a first slope facing the first end, which slope has an angle with the guidance part between 5 and 45 degrees; and includes a second slope facing the second end, which slope has an angle with the guidance part between 30 and 60 degrees.

A quick connect fitting kit includes a chuck having a threaded end. The chuck defines a channel. A collar has a threaded end and a sloped inner surface. The threaded end of the collar is meshable with the threaded end of the chuck to mount the collar to the chuck. A collet has a sloped outer surface. The collet is positioned within the collar such that the sloped outer surface of the collet is positioned on the sloped inner surface of the collar. The collet defines a passage. The passage of the collet is sized for receipt of a pipe. The pipe is in fluid communication with the channel of the chuck when the collet is compressed against the pipe and the collar is mounted to the chuck.

A connector for circuit elements of hydraulic or pneumatic systems, comprising: a first connecting body (10) extending along an axis (X); a second connecting body (20) extending along an axis (Y); wherein the first connecting body (10) and the second connecting body (20) can be installed on respective portions of circuit elements and are configured to provide a reversible fluid connection between the circuit elements in which the connector comprises: a first coupling member comprising a male tubular portion on the first connecting body (10) and a respective female tubular portion (23) on the second connecting body (20) to realize a fluid sealing connection by inserting the male tubular portion into a cavity of the female tubular portion (23) configured to guide the male tubular portion; a second coupling member comprising at least one protuberance (14) on an outer surface (11) of the first connecting body (10) and a respective groove (24) on the second connecting body (20) for making a mechanical reversible connection between the first connecting body (10) and the second connecting body (20) in which the protuberance (14) is configured to fit into the groove (24) and prevent an axial extraction between the first connecting body (10) and the second connecting body (20); a third coupling member comprising on the first connecting body (10) at least one flexible tab (15) having a projection (16) on the outer surface (11) and an opening on an external surface (21) of the second connecting body (20) suitable to contain the projection (16) to prevent a relative rotation between the first connecting body (10) and the second connecting body (20) around the respective development axes (X, Y).

A coupling fitting comprises a cylindrical first body having a first end portion, a first coupling part having a plurality of first protrusions arranged around the first end portion and having hooks formed thereon, and a first seal material provided on an outer circumference of the first end portion. A gap is formed between the outer circumference and the plurality of first protrusions. When the coupling fitting is coupled with the target fitting, a part of the target fitting is inserted into the gap, the hooks of the plurality of first protrusions engage the target fitting, and the first seal material contacts an inner circumference of the target fitting.

A fuel drain engagement tool and a method for draining fuel from a fuel tank are provided. In one example, a fuel drain engagement tool includes a housing. An engagement mechanism is coupled with the housing and extending upward therefrom. The engagement mechanism is configured to engage a fuel drain valve and to move between a contracted state and an expanded state. A compression applicator is coupled with the housing and is positioned to engage the engagement mechanism when the compression applicator is compressed to apply a force to the engagement mechanism that causes the engagement mechanism to move from the expanded state to the contracted state.