Abstract:
A distributed beacon network and cloud-based management system (100) are disclosed. The beacons (102) are each configured to transmit wireless messages comprising a unique identifier generated using respective asymmetric key pairs. An administrator is enabled via a hosted web portal to remotely designate content in association with beacons, as well as proximity settings, content tags, etc. A mobile device (104) proximate to one or more beacons receives their messages via an open browser and forwards an associated content request to a hosted server. The server authenticates the beacons by retrieving and implementing the respective asymmetric key pairs. Upon authentication, the server provides access via the device browser to content designated for one or more of the beacons, and corresponding to the proximity settings and content tags. Content is provided via hosted web portals, or by redirection of the browser to third party URLs designated via the administrator interface.
Abstract:
A floor drain valve (10) in the form of a flapper valve, which includes a pressure relief conduit (34) to equalize pressure across the valve and permit unrestrained draining of fluid through the valve. The pressure relief conduit (34) is equipped with a valve member (30) which opens upon a predetermined pressure on the downstream side of the valve (10), and may further comprise a ball valve (24) to ensure that gas can escape through the conduit but liquids are prevented from it. The valve (10) may be fixed into a drain pipe by means of an expansion ring (80, 82, 84)
Abstract:
A drain valve allows for drainage of fluids while preventing backflow of gases from a drainage system through the drain valve. A drain valve can have a first, sealed position in which a component of the valve seals an opening through the valve and a second, open position in which the component of the valve is separated from the opening to allow a fluid to drain through the valve. When the fluid has drained through, the component of the valve can return to the closed position. The valve can include a pressure relief conduit to help equalize pressure across the valve and permit unrestrained draining of fluid through the valve.