Patents by Inventor Andrew Martin Mitchell
Andrew Martin Mitchell 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: 9282864Abstract: A floor tool for a vacuum cleaning appliance comprising a support member adapted to support a cleaning element and at least one suction nozzle in communication with a conduit that is attachable to a vacuum cleaning appliance, wherein a neck for controlling the floor tool is coupled to the support member and wherein the at least one suction nozzle is configured to float relative to the neck.Type: GrantFiled: August 2, 2013Date of Patent: March 15, 2016Assignee: Dyson Technology LimitedInventors: Christian Guder, Donald James McIntosh, Andrew Martin Mitchell, David Andrew Isley, Stephen Robert Dimbylow
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Publication number: 20140033468Abstract: A floor tool for a vacuum cleaning appliance comprising a support member adapted to support a cleaning element and at least one suction nozzle in communication with a conduit that is attachable to a vacuum cleaning appliance, wherein a neck for controlling the floor tool is coupled to the support member and wherein the at least one suction nozzle is configured to float relative to the neck.Type: ApplicationFiled: August 2, 2013Publication date: February 6, 2014Applicant: Dyson Technology LimitedInventors: Christian GUDER, Donald James MCINTOSH, Andrew Martin MITCHELL, David Andrew ISLEY, Stephen Robert DIMBYLOW
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Patent number: 8132288Abstract: A surface treating head assembly for an appliance such as a vacuum cleaner includes a head and a drivable agitator in the form of a brush bar, rotatably housed in the head. A cam arrangement is rotatably driven in the head. The cam arrangement includes a pair of cams, each having a plurality of cam faces, each cam face corresponding to respective predetermined vertical positions of the brush bar. Thus, the height of the brush bar is selectively controllable between the predetermined positions, such that the depth of penetration of the bristles of the brush bar may be optimized for different types of carpet.Type: GrantFiled: January 27, 2010Date of Patent: March 13, 2012Assignee: Dyson Technology LimitedInventors: Paul Dawson, Scott Andrew Maguire, Andrew Martin Mitchell, Spencer James Robert Arthey
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Patent number: 7895706Abstract: A surface treating head assembly for an appliance such as a vacuum cleaner includes a head and a drivable agitator in the form of a brush bar, rotatably housed in a housing. A motor is arranged to drive a mechanism, such as cams arranged to adjust the position of the brush bar with respect to the housing. An electro-mechanical feedback arrangement, which may include an actuator, is arranged to bear against microswitches to control operation of the motor. Different faces of the actuator are arranged to act against different ones of the microswitches in accordance with different positions of the brush bar. The height of the brush bar is selectively controllable between the predetermined positions, such that the depth of penetration of the bristles of the brush bar may be optimized for different types of carpet.Type: GrantFiled: January 27, 2010Date of Patent: March 1, 2011Assignee: Dyson Technology LimitedInventors: Andrew Martin Mitchell, Clive James Frederickson
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Publication number: 20100205769Abstract: A surface treating head assembly for an appliance such as a vacuum cleaner includes a head and a drivable agitator in the form of a brush bar, rotatably housed in a housing. A motor is arranged to drive a mechanism, such as cams arranged to adjust the position of the brush bar with respect to the housing. An electro-mechanical feedback arrangement, which may include an actuator, is arranged to bear against microswitches to control operation of the motor. Different faces of the actuator are arranged to act against different ones of the microswitches in accordance with different positions of the brush bar. The height of the brush bar is selectively controllable between the predetermined positions, such that the depth of penetration of the bristles of the brush bar may be optimized for different types of carpet.Type: ApplicationFiled: January 27, 2010Publication date: August 19, 2010Applicant: DYSON TECHNOLOGY LIMITEDInventors: Andrew Martin Mitchell, Clive James Frederickson
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Publication number: 20100192323Abstract: A surface treating head assembly for an appliance such as a vacuum cleaner includes a head and a drivable agitator in the form of a brush bar, rotatably housed in the head. A cam arrangement is rotatably driven in the head. The cam arrangement includes a pair of cams, each having a plurality of cam faces, each cam face corresponding to respective predetermined vertical positions of the brush bar. Thus, the height of the brush bar is selectively controllable between the predetermined positions, such that the depth of penetration of the bristles of the brush bar may be optimized for different types of carpet.Type: ApplicationFiled: January 27, 2010Publication date: August 5, 2010Applicant: Dyson Technology LimitedInventors: Paul Dawson, Scott Andrew Maguire, Andrew Martin Mitchell, Spencer James Robert Arthey
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Publication number: 20040054163Abstract: A method for isolating nucleic acid which comprises:Type: ApplicationFiled: August 15, 2003Publication date: March 18, 2004Inventors: Andrew Martin Mitchell, Neil James Butt, Christopher Peter Jones
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Publication number: 20020010323Abstract: A method for isolating nucleic acid which comprises: p1 (a) applying a sample comprising cells containing nucleic acid to a filter, whereby the cells are retained as a retentate and contaminants are removed; p1 (b) lysing the retentate from step (a) whilst the retentate is retained by the filter to form a cell lysate containing the nucleic acid; p1 (c) filtering the cell lysate with the filter to retain the nucleic acid and remove remaining cell lysate; p1 (d) optionally washing the nucleic acid retained by the filter; and p1 (e) eluting the nucleic acid, wherein the filter composition and dimensions are selected so that the filter is capable of retaining the cells and the nucleic acid.Type: ApplicationFiled: October 8, 1999Publication date: January 24, 2002Inventors: ANDREW MARTIN MITCHELL, NEIL JAMES BUTT, CHRISTOPHER PETER JONES
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Patent number: D948429Type: GrantFiled: September 24, 2020Date of Patent: April 12, 2022Assignee: Dyson Technology LimitedInventors: Philip Stephen Douglas, Simon Brian McNamee, Alexander Patrick Webster, Alexander Stuart Knox, Giles Ashbee, William Henry Kerr, Andrew Martin Mitchell, Nathan Geoffrey Dobbs
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Patent number: D976507Type: GrantFiled: September 24, 2020Date of Patent: January 24, 2023Assignee: Dyson Technology LimitedInventors: Philip Stephen Douglas, Simon Brian McNamee, Alexander Patrick Webster, Alexander Stuart Knox, Giles Ashbee, William Henry Kerr, Andrew Martin Mitchell, James Murray Orchard, Tom Briscoe
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Patent number: D979867Type: GrantFiled: September 24, 2020Date of Patent: February 28, 2023Assignee: Dyson Technology LimitedInventors: Philip Stephen Douglas, Simon Brian McNamee, Alexander Patrick Webster, Alexander Stuart Knox, Giles Ashbee, William Henry Kerr, Andrew Martin Mitchell, Ketan Patel
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Patent number: D987925Type: GrantFiled: September 24, 2020Date of Patent: May 30, 2023Assignee: Dyson Technology LimitedInventors: Philip Stephen Douglas, Simon Brian McNamee, Alexander Patrick Webster, Alexander Stuart Knox, Giles Ashbee, William Henry Kerr, Andrew Martin Mitchell, Ketan Patel