Patent ID: 8618938
Filing Date: 2013-12-31
Classification: F17C,G09F,Y10T

Abstract:
1. An assembly for fixed orientation of an RFID (radio frequency identification) transponder with respect to a gas cylinder, comprising: a gas cylinder configured to store a gas, the gas cylinder having a central opening on its top surface; a valve flange coupled within the central opening of the gas cylinder, the valve flange having a primary valve opening; a metal plate having a bottom surface coupled to the gas cylinder, the metal plate having a recess formed within the bottom surface and configured to house an RFID transponder and to fix an orientation of the RFID transponder with respect to the primary valve opening; and an RFID transponder located within the recess of the metal plate, the RFID transponder having an elongated ferrite core antenna including a wire wrapped around a ferrite core and further having a volume of about 100 cubic millimeters or less; wherein the RFID transponder is configured to communicate with an external reader using phase shift keying (PSK) modulation; and wherein the elongated ferrite core antenna of the RFID transponder within the recess has a fixed orientation such that a line passing through a center of the elongated ferrite core antenna is offset by 40 degrees or less from a line passing through a center axis of the valve flange and the RFID transponder.