Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 3, 2012
Patent Application Number
12327656
Date Filed
December 3, 2008
Patent Citations Received
Patent Primary Examiner
Patent abstract
A pig for movement within a pipeline comprising a cylindrical housing with annular seals circumferentially mounted to the housing and extending outwards for sealing engagement between the pipeline and the housing. An internal flow cavity passes through the housing, with a gate positioned within the internal flow cavity, initially obstructing flow through the cavity. A locking device, connected to the gate, prevents the gate opening. A sensing device is capable of receiving a signal and is connected to an unlocking device. The sensing device receives a signal activating the unlocking device, thereby removing the locking device, permitting the gate to open and flow to pass through the cavity.
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