Abstract: Apparatuses and methods for compressed fluid vessel monitoring can permit a user to more easily order replacement vessels, monitor use, monitor inventory and return empty vessels. Embodiments can utilize a collar connectable to a vessel to help facilitate such functionality. The collar can be adapted to transmit signals to a data processing system. The data processing system can be adapted to permit a user to track the location and fill status of the vessel as well as order a replacement vessel and disposal or return of an empty vessel. Instrumented vessels can also convey sensor data to help identify a leak condition or other condition of the vessel. In some embodiments, the data processing system can be adapted for integration into a user's inventory system and/or purchasing system as well as a supplier's system to facilitate communications concerning vessel fill status, reorder, and/or vessel return.

Abstract: A heat exchanger (4) comprises a heat exchanger core (20) comprising first fluid channels (22) and second fluid flow channels (24) for exchange of heat between the first and second fluids. First and second manifold portions (42, 44) are provided to guide the first and second fluids between the first and second fluid flow channels (22, 249 and first and second fluid interface portions (48, 49) which comprise fewer channels than the heat exchanger core (20). The first manifold portion (42) includes at least one tunnel portion (46) extending through the second manifold portion (44) at an angle to the direction of second fluid flow. Hence at least part of the first fluid is directed through the inside of the tunnel portion while the second fluid passes around the outside of the tunnel portion. This enables more compact heat exchanger design.

Abstract: A heat exchanger (4) comprises a heat exchanger core (20) comprising first fluid channels (22) and second fluid flow channels (24) for exchange of heat between the first and second fluids. First and second manifold portions (42, 44) are provided to guide the first and second fluids between the first and second fluid flow channels (22, 249 and first and second fluid interface portions (48, 49) which comprise fewer channels than the heat exchanger core (20). The first manifold portion (42) includes at least one tunnel portion (46) extending through the second manifold portion (44) at an angle to the direction of second fluid flow. Hence at least part of the first fluid is directed through the inside of the tunnel portion while the second fluid passes around the outside of the tunnel portion. This enables more compact heat exchanger design.

Abstract: An article of footwear includes a flexible cover shaped to envelope at least a portion of a wearer's foot. The cover has a sole region with inner and outer surfaces, the inner surface positioned to face the sole of the wearer's foot and the outer surface positioned to face in an opposite direction. The cover also has a plurality of apertures formed in the sole region. The article further includes a removable outsole nested within the cover. The outsole has an upper surface positioned to face the sole of the wearer's foot, a lower surface facing the inner surface of the cover sole region, and a plurality of lugs on the lower surface which protrude into the plurality of apertures.

Abstract: An article of footwear includes a flexible cover shaped to envelope at least a portion of a wearer's foot. The cover has a sole region with inner and outer surfaces, the inner surface positioned to face the sole of the wearer's foot and the outer surface positioned to face in an opposite direction. The cover also has a plurality of apertures formed in the sole region. The article further includes a removable outsole nested within the cover. The outsole has an upper surface positioned to face the sole of the wearer's foot, a lower surface facing the inner surface of the cover sole region, and a plurality of lugs on the lower surface which protrude into the plurality of apertures.