One or more sections of a ventilated wall are provided around an outdoor space is not enclosed with a ceiling to form a fenced enclosure. Cooled air at a temperature colder than ambient temperature is supplied into the fenced enclosure through perforations in the wall and/or from an air-conditioned building adjacent to the fenced enclosure at displacement velocity to avoid disrupting stratification of air inside of the fenced enclosure. The cooled air pools inside of the fenced enclosure providing cooling for outdoor activities such as al fresco dining.

Provided are a flexible insulated air duct and a modular flexible insulated air-duct system; the flexible insulated air duct includes an air-duct main body (1); the air-duct main body (1) includes an inner air-duct layer (5) and a heat-insulating layer (4) integrally formed on the inner air-duct layer (5); the inner air-duct layer (5) is arranged inside the heat-insulating layer (4), and the heat-insulating layer (4) is a rubber/plastic material. The modular flexible insulated air-duct system made by assembling a main air duct (7), a branched air duct (8), and a connecting air duct (9) may be rapidly connected on-site using a zip fastener to form an air-duct system having any configuration.

An air control system 20 and associated methods including a flexible duct 30 having air exit holes 40, 42 and a flexible liner 50, 60 sheet within the duct 30 and extending longitudinally along the duct, the liner 50 sheet having opposite longitudinal edges 52, 54 connected to the duct 30 along the longitudinal length of the duct 30, the liner 50 sheet being permeable in one aspect and regulating air flow through the exit holes 40, 42 when the sheet is pressed against the portion of the duct having the exit holes, and an air exit hole positioned in the duct downstream a terminal end of the liner sheet such that air exits the duct through the air exit hole to reduce or eliminate retrograde airflow along a length of the duct.

A surgical robotic arm drape for enveloping a portion of a robotic arm, the drape comprising: an exterior sheet defining an elongate cavity for housing a portion of a robotic arm; and a duct defined at least in part by material integral with the exterior sheet, the duct defining a fluid path along the longitudinal extent of the cavity to channel fluid to or from a robotic arm housed within the cavity.

A duct for air transport comprises an inner jacket having an inlet end for connecting the duct to an air supply and an outlet end for connecting the duct to a duct for a further transport or distribution of air, and an outer jacket made of an impervious material and surrounding the inner jacket spaced therefrom. An insulating chamber is formed between the inner jacket and the outer jacket. The inner jacket and the outer jacket are adapted to conduct from the interior space of the inner jacket through the insulating chamber into the ambient atmosphere, namely in an amount of 0.02 to 100% of the total volume of air fed into the inner jacket. The area for conducting air into the insulating chamber and the area for conducting air away from the insulating chamber are spaced from each other during the operation of the duct.

A reinforcing assembly for air ducts includes a helical reinforcement with an outer circumference and at least one connecting element for fixing a pitch of a helix formed by the helical reinforcement. The at least one connecting element may be fixed to the helical reinforcement by a plurality of j joints with mutually arranged spacing. The reinforcing assembly may be combined with an air duct to form a duct system for transmitting and distributing air that retains its shape regardless of the system's internal air pressure.

Fabric silencers for air ducts are disclosed. An example air duct silencer system includes an inner tube being of a first pliable material, the inner tube defining an airway extending along the inner tube. The example air duct silencer system further includes an outer tube being of a second pliable material, the outer tube to encircle the inner tube to define an annular space between the outer tube and the inner tube. The example air duct silencer system also includes a sound absorbing material to be disposed within the annular space.

A pipe for forming air flow pipelines in a structure that includes a flexible tube made from composite material, the tube having, on the length of same, sections for which the wall of the tube is stiffened by means of structural elements made from a rigid composite material incorporated into the wall of the tube. The structural elements are configured and arranged at the surface of the tube in such a way as to form a lattice framework surrounding the wall of the tube. The pipe further includes electrical conductors, disposed longitudinally on the wall of the pipe, the electrical conductors having a straight path at the stiffened sections of the pipe and a meandering path at certain of the non-stiffened sections of the pipe, the meandering allowing the conductor to tolerate the possible twisting of the pipe when it is installed in the structure.

A sleeping space air conditioner including a quiet low powered air conditioner 1, a sleeping space into which conditioned air is delivered, the sleeping space including an upper air pervious section 2 and a lower relatively air impervious section 3 surrounding a bed in the sleeping space, the impervious section 3 extending to a height above the sleeping surface of the bed sufficient to contain the conditioned air as it moves towards and returns from the opposite end or side of the sleeping space, the impervious section 3 extending to a sufficiently increased height above the sleeping surface at the opposite end or side to allow the direction of air flow to reverse towards said one end or side without substantial loss of conditioned air through the pervious section 2.

A flexible ventilation duct production method includes forming an inner layer using at least one of aluminum PET, polyester, metalized OPP, metalized polyester and PVC; forming an insulation layer comprised of rubber, polyethylene liners, polyester fibers or similar insulation materials; assembling a steel wire taking shape from being spirally wound around a cylinder; forming an outer layer using at least one of aluminum PET, polyester, metalized OPP, metalized polyester and PVC; and laminating by being wound to a constantly rotating cylindrical shaft in a certain order to form an integrated, holistic structure between all the factors, which is constantly rotated around its own axis in strip plates and is constantly fed to the mentioned cylindrical shaft, by meanwhile providing complete lamination with the applied chemicals.