A fluid loading joint includes: a first half provided at an end of a first vacuum double pipe, the first half including a first inner pipe, a first outer pipe, and a first blocking member blocking between the first inner pipe and the first outer pipe; a second half provided at an end of a second vacuum double pipe, the second half including a second inner pipe, a second outer pipe, and a second blocking member blocking between the second inner pipe and the second outer pipe; an annular inner insulator interposed between the first inner pipe and the second inner pipe; and an annular outer insulator interposed between the first outer pipe and the second outer pipe, the outer insulator surrounding the inner insulator, with a gas space positioned between the outer insulator and the inner insulator, the gas space being formed between the first blocking member and the second blocking member.

A fluid loading joint for rotatably connecting double pipes to each other includes: a first half including a first inner pipe, a first outer pipe, and a holder, the first inner pipe being provided with a first flange, the first outer pipe accommodating the first inner pipe therein, the holder holding the first outer pipe such that the first outer pipe is rotatable; a second half including a sliding surface facing the first flange, the second half including a second inner pipe and a second outer pipe, the second inner pipe being provided with a second flange, the second outer pipe accommodating the second inner pipe therein and being provided with an outer flange that is fastened to the holder; an inner sealing member and an outer sealing member that are disposed between the first flange and the sliding surface; an inner passage provided in the second flange, the inner passage leading a leaked fluid from between the inner sealing member and the outer sealing member to an outer circumferential surface of the second flange; an outer passage provided in the outer flange, the outer passage leading the leaked fluid from an inner side to an outer side of the second outer pipe; and a leakage pipe that connects the inner passage and the outer passage between the second flange and the outer flange.

A fluid loading joint for rotatably connecting double pipes to each other includes: a first half including a first inner pipe, a first outer pipe, and a holder, the first inner pipe being provided with a first flange, the first outer pipe accommodating the first inner pipe therein, the holder holding the first outer pipe such that the first outer pipe is rotatable; a second half including a sliding surface facing the first flange, the second half including a second inner pipe and a second outer pipe, the second inner pipe being provided with a second flange, the second outer pipe accommodating the second inner pipe therein and being provided with an outer flange that is fastened to the holder; an inner sealing member and an outer sealing member that are disposed between the first flange and the sliding surface; an inner passage provided in the second flange, the inner passage leading a leaked fluid from between the inner sealing member and the outer sealing member to an outer circumferential surface of the second flange; an outer passage provided in the outer flange, the outer passage leading the leaked fluid from an inner side to an outer side of the second outer pipe; and a leakage pipe that connects the inner passage and the outer passage between the second flange and the outer flange.

A coupling device has two releasably interconnected coupling parts which are movably arranged relative to one another in at least one direction of rotation. Each coupling part has fluid channels which are separated in groups from each other and open into respectively assignable connecting spaces. The connecting spaces are located at adjacent end sides of the coupling parts and are separated from one another within a coupling part.

A coupling device has two releasably interconnected coupling parts which are movably arranged relative to one another in at least one direction of rotation. Each coupling part has fluid channels which are separated in groups from each other and open into respectively assignable connecting spaces. The connecting spaces are located at adjacent end sides of the coupling parts and are separated from one another within a coupling part.

A compressor assembly for a portable oxygen concentrator includes a first compressor chamber having a first connector, a second compressor chamber having a second connector, and a tube having a first end having a first connection interface configured to connect to the first connector and a second end having a second connection interface configured to connect to the second connector. The first connection interface is shaped to maintain the connection between the first connector and the first connection interface in a fixed orientation and the second connection interface is shaped to maintain the connection between the second connector and the second connection interface in a fixed orientation. One or more of the first connector, the second connector, and the tube are compliant.

A compressor assembly for a portable oxygen concentrator includes a first compressor chamber having a first connector, a second compressor chamber having a second connector, and a tube having a first end having a first connection interface configured to connect to the first connector and a second end having a second connection interface configured to connect to the second connector. The first connection interface is shaped to maintain the connection between the first connector and the first connection interface in a fixed orientation and the second connection interface is shaped to maintain the connection between the second connector and the second connection interface in a fixed orientation. One or more of the first connector, the second connector, and the tube are compliant.

A connecting device (1) for a line system for passing through charged particles, the connecting device (1) having first and second flanges (2, 4) and a bellows (6). The first flange (2) and the second flange (4) are connected to each other with the interposition of the bellows (6), and the first flange (2) and the second flange (4) are movable relative to one another to compensate for displacements in the line system in a longitudinal direction (7) and in at least one transverse direction (8) angled relative thereto. A line element (10) is arranged inside the bellows (6) and connects the flanges (2, 4) electrically conductively to one another. The line element (10) is movably mounted in or on both connection elements (13, 14) of the two flanges (2, 4), and/or the line element (10) has at least one annular spring (15) or at least one helical spring (16).

Machine (1) for distributing flowable media to containers with a housing (2), with a transport device (12) for transporting the containers (10) which is arranged at least partially inside the housing (2), wherein this transport device has a rotatable carrier (14) with a distributor device (4) which is arranged inside this housing (2) an accommodates at least one inlet (42) for the flowable medium and a plurality of outlets (44) to which the flowable medium can be distributed, and with a supply conduit (6) which is suitable and intended for supplying the flowable medium to the inlet (42). According to the invention the distributor device (4) is non-rotatably connected to the carrier (14).

A battery retaining system for a portable oxygen concentrator includes a first rail configured to receive a first slide of a battery, a second rail configured to receive a second slide of the battery, the second rail being spaced apart from the first rail so as to form a channel configured to receive the battery, and a flexible stiffening mechanism configured to impart a biasing force on a surface of the battery when the battery is received within the channel. The flexible stiffening mechanism includes a protrusion projecting from the first rail at least partially towards the second rail and a slit positioned behind the protrusion and configured to facilitate travel of the protrusion fore and aft.