Systems and designs are provided for a flexible connector to be used in fuel and hydraulic lines that can withstand a high level of internal and external stress. In one example, the connector consists of three separate components, an upper, a lower and a middle portion. Spherical bearings and compression springs are used o couple the three portions together. Spherical bearings provide the ability of the connector to rotate about an axis, while the compression springs hold together the system.

A guidance unit comprises a first pipe part and a second pipe part, an inner space diameter of the second pipe part is smaller than an inner space diameter of the first pipe part, causing a cross-sectional area of a second flow space perpendicular to a pipe axis of the second pipe part smaller than that of a first flow space perpendicular to a pipe axis of the first pipe part; one end of the pipe axis of the second pipe part and one end of the pipe axis of the first pipe part are connected in series with each other and spaced apart from each other by a first angle, so that the second flow space communicates with the first flow space; thereby, a pressure of an external fluid in the second flow space is greater than a pressure of the external fluid in the first flow space.

Pipework components are described including: a tubular body; the body includes first and second ends which include respective corresponding male and female attachment formations; the body defines an interior passageway extending from the first end to the second end; the first and second attachment formations are angled with respect to one another.

Systems and designs are provided for a flexible connector to be used in fuel and hydraulic lines that can withstand a high level of internal and external stress. In one example, the connector consists of three separate components, an upper, a lower and a middle portion. Spherical bearings and compression springs are used o couple the three portions together. Spherical bearings provide the ability of the connector to rotate about an axis, while the compression springs hold together the system.

A pressure washer coupler is provided between the wand and spray nozzle of the pressure washer so that the angle of the spray can be selectively set. The coupler includes male and female quick connectors for the wand and the spray nozzle. A spring biased detent assembly allows one end of the coupler to be rotated 360 relative to the other end of the coupler, with the detent assembly maintaining the ends in a selected position. Thus, the spray can be directed parallel or perpendicular to the wand axis, and to numerous orientations therebetween.

A gas connector assembly is disclosed and comprises a first pipe member and a second pipe member. The first cap is covered at top of the first pipe body. Part of the male connection section is rotatably inserted into the first pipe body. The first balls are arranged between the first pipe body and the first cap and limited by the male connection section. Top of the second pipe body is fluidly communicated with bottom of the first pipe body. A first obtuse angle is included between the first and second pipe bodies. The second cap is covered at bottom of the second pipe body. The female connection section is rotatably inserted into the second pipe body. The second balls are arranged between the second pipe body and the second cap and limited by the female connection section.

A swivel knuckle assembly for interconnecting a motor and a supply line. The knuckle assembly may include a bearing member to reduce a coefficient of friction. A locking mechanism is disclosed to connect members of the knuckle assembly.