Patents by Inventor David Benjamin Smith
David Benjamin Smith has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11930117Abstract: Participants as requestors using a requesting network element request one or more tokenization processors to generate tokens that represent a sanitized version of data such that the resultant tokens are amenable to comparison across participants. As circumstances warrant, one or more such tokens can be submitted to the tokenization processor(s) to privately retrieve the original data. Role-based access control scope parameters and tokenization processor-specific tokenization processor secrets can be embedded into reversible tokens that remain invariant under updating of the tokenization processor secrets across tokenization processors.Type: GrantFiled: July 31, 2023Date of Patent: March 12, 2024Assignee: Springcoin, Inc.Inventors: David William Kravitz, Michael Young, Mollie Zechlin Halverson, Matthew Benjamin Smith
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Patent number: 9592568Abstract: A subsea friction welding apparatus comprises a chuck for supporting and retaining a weld item prior to welding the weld item to a work-piece, said chuck comprises a plurality of jaws having an internal profile to grip a corresponding profiled surface on the weld item and means for radially expanding the internal profile of the jaws of the chuck, said means actuable by axial insertion of the weld item into the chuck thereby avoiding relative rotation of the chuck and the weld item during insertion of the weld item into the chuck. In operation of the method, a supply of weld items and a weld head are deployed to a subsea location and the weld items are loaded via ROV into the weld head at the subsea location.Type: GrantFiled: May 27, 2015Date of Patent: March 14, 2017Assignee: PROSERV UK LIMITEDInventors: Adam James O'Leary, David Benjamin Smith, Nathan Alan Paculba, Kevin Grant Munro, David Ewen Gibson
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Publication number: 20150343558Abstract: A subsea friction welding apparatus comprises a chuck for supporting and retaining a weld item prior to welding the weld item to a work-piece, said chuck comprises a plurality of jaws having an internal profile to grip a corresponding profiled surface on the weld item and means for radially expanding the internal profile of the jaws of the chuck, said means actuable by axial insertion of the weld item into the chuck thereby avoiding relative rotation of the chuck and the weld item during insertion of the weld item into the chuck. In operation of the method, a supply of weld items and a weld head are deployed to a subsea location and the weld items are loaded via ROV into the weld head at the subsea location.Type: ApplicationFiled: May 27, 2015Publication date: December 3, 2015Applicant: PROSERV UK LTD.Inventors: Adam James O'Leary, David Benjamin Smith, Nathan Alan Paculba, Kevin Grant Munro, David Ewen Gibson
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Patent number: 7976597Abstract: A cyclonic separation apparatus comprises a plurality of series-connected separation stages 50,51, each comprising a plurality of cyclone separators 16/23 connected in parallel and disposed in a generally annular arrangement about a main vertical axis of the apparatus, with their respective longitudinal cyclone axes extending parallel to the main axis. The successive separation stages 50,51 in the direction of fluid flow are disposed radially inwardly of each other with respect to the main axis of the apparatus and are also vertically staggered upwardly, so that the outlet 20 of one separation stage 50 leads directly into the inlet 22 of the next downstream stage 51. The multi-stage, series connected cyclone separators of the apparatus provide a high separation efficiency, yet the annular arrangement of the stages 50,51 makes the apparatus compact and enables the apparatus to be utilized in a vacuum cleaner.Type: GrantFiled: October 22, 2008Date of Patent: July 12, 2011Assignee: Hoover LimitedInventor: David Benjamin Smith
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Patent number: 7955406Abstract: A cyclonic separation apparatus comprising at least two series connected separation stages and a receptacle for collecting material separated by the separation stages is described. The first stage comprises a first cyclone separator, and the second stage comprises a plurality of parallel connected second cyclone separators. The first and second separation stages are connected by at least one transfer duct which extends through the receptacle and transfers fluid that has been partly cleaned by the first separation stage to the second separation stage.Type: GrantFiled: December 19, 2007Date of Patent: June 7, 2011Assignee: Hoover LimitedInventor: David Benjamin Smith
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Patent number: 7955405Abstract: A cyclonic vacuum cleaner comprises a first stage 10 comprising a single cyclone separator for separating heavier dirt and dust particles and a second stage 11 comprising a plurality of cyclone separators 25 arranged in parallel in a plurality of groups, each group of cyclone separators 25 comprising a respective inlet duct 24, each inlet duct 24 being connected at its upstream end to the first stage 10 and at its downstream end to the cyclone separators 25 of its respective group.Type: GrantFiled: December 19, 2007Date of Patent: June 7, 2011Assignee: Hoover LimitedInventor: David Benjamin Smith
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Patent number: 7655058Abstract: A vacuum cleaner includes a pair of low efficiency cyclones connected upstream of respective groups of high efficiency cyclones by respective elongate ducts. The high efficiency cyclones of each group can be arranged in a line or a cluster extending away from their respective low efficiency cyclone, such that at least a portion of one side of the low efficiency cyclone is exposed. The high efficiency cyclones can be connected to their respective elongate ducts at respective positions along the length thereof, with each cyclone comprising an inlet connecting to the duct. The inlets of each high efficiency cyclone can be stepped along the axis of the duct with respect to the inlet of each other cyclone of the group, in a direction which extends across the width of the duct.Type: GrantFiled: March 23, 2007Date of Patent: February 2, 2010Assignee: Hoover LimitedInventor: David Benjamin Smith
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Publication number: 20090100810Abstract: A cyclonic separation apparatus comprises a plurality of series-connected separation stages 50,51, each comprising a plurality of cyclone separators 16/23 connected in parallel and disposed in a generally annular arrangement about a main vertical axis of the apparatus, with their respective longitudinal cyclone axes extending parallel to the main axis. The successive separation stages 50,51 in the direction of fluid flow are disposed radially inwardly of each other with respect to the main axis of the apparatus and are also vertically staggered upwardly, so that the outlet 20 of one separation stage 50 leads directly into the inlet 22 of the next downstream stage 51. The multi-stage, series connected cyclone separators of the apparatus provide a high separation efficiency, yet the annular arrangement of the stages 50,51 makes the apparatus compact and enables the apparatus to be utilised in a vacuum cleaner.Type: ApplicationFiled: October 22, 2008Publication date: April 23, 2009Inventor: David Benjamin Smith
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Patent number: 7441307Abstract: A restricting device is positioned in the flow duct leading from the main inlet to the cleaning head of a vacuum cleaner and is movable between a restrictive position, in which it serves to restrict the cross-section of the discharge outlet, and an open position, in which it restricts the cross-section of the discharge outlet to a lesser extent. The restricting device is movable by the passage of debris along the flow duct.Type: GrantFiled: September 10, 2003Date of Patent: October 28, 2008Assignee: Dyson Technology LimitedInventor: David Benjamin Smith
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Publication number: 20080155948Abstract: A cyclonic separation apparatus comprising at least two series connected separation stages and a receptacle for collecting material separated by the separation stages, is described. The first stage comprises a first cyclone separator and the second stage comprises a plurality of parallel connected second cyclone separators. The first and second separation stages are connected by at least one transfer duct which extends through the receptacle and transfers fluid that has been partly cleaned by the first separation stage, to the second separation stage.Type: ApplicationFiled: December 19, 2007Publication date: July 3, 2008Inventor: David Benjamin Smith
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Publication number: 20080148694Abstract: A cyclonic vacuum cleaner comprises a first stage 10 comprising a single cyclone separator for separating heavier dirt and dust particles and a second stage 11 comprising a plurality of cyclone separators 25 arranged in parallel in a plurality of groups, each group of cyclone separators 25 comprising a respective inlet duct 24, each inlet duct 24 being connected at its upstream end to the first stage 10 and at its downstream end to the cyclone separators 25 of its respective group.Type: ApplicationFiled: December 19, 2007Publication date: June 26, 2008Inventor: David Benjamin Smith
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Publication number: 20070220845Abstract: A vacuum cleaner includes a pair of low efficiency cyclones connected upstream of respective groups of high efficiency cyclones by respective elongate ducts. The high efficiency cyclones of each group can be arranged in a line or a cluster extending away from their respective low efficiency cyclone, such that at least a portion of one side of the low efficiency cyclone is exposed. The high efficiency cyclones can be connected to their respective elongate ducts at respective positions along the length thereof, with each cyclone comprising an inlet connecting to the duct. The inlets of each high efficiency cyclone can be stepped along the axis of the duct with respect to the inlet of each other cyclone of the group, in a direction which extends across the width of the duct.Type: ApplicationFiled: March 23, 2007Publication date: September 27, 2007Inventor: David Benjamin Smith
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Patent number: D511231Type: GrantFiled: January 21, 2004Date of Patent: November 1, 2005Assignee: Dyson LimitedInventors: Simon Nicholad Langham, David Benjamin Smith
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Patent number: D515756Type: GrantFiled: July 7, 2004Date of Patent: February 21, 2006Assignee: Dyson LimitedInventors: Matthew James Roger Allard, David Benjamin Smith, Simon Nicholas Langham, Wen Tong Chong