Patents by Inventor Mark Gregory Marshall
Mark Gregory Marshall 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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Publication number: 20170267039Abstract: A device for controlling tire pressure is disclosed which comprises a pump (28) having opposed pistons (30) which reciprocate in cylinders (40) carried by a casing (38). The pistons (30) are at the outer ends of rings (50) which are themselves fitted to an eccentric (26). The eccentric (26) is integral with a clutch plate (24). A second clutch plate (22) is fixed to a non-rotating axle (18) which itself forms part of a hanging counterweight structure (20). A piston (84) pushes the eccentric and clutch plate (26, 24) against the clutch plate (22) thereby to prevent the eccentric (26) from rotating with the rings (50) upon a sensor detecting that a tire has a low pressure in it. Stopping the eccentric initiates the pumping action of the pistons (30).Type: ApplicationFiled: June 1, 2017Publication date: September 21, 2017Inventors: Pierre van Wyk Becker, Mark Gregory Marshall
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Patent number: 9451787Abstract: An ozone-based disinfecting device is provided comprising a mixer having a generally hollow body with a water inlet for water under pressure, a spray nozzle for generating a generally conical spray of water introduced by way of the water inlet, a contact chamber communicating with a gas inlet for ozone rich gases, and an outlet aperture from the contact chamber that is coaxial with the spray nozzle and spaced apart therefrom. An electronic flow sensing device senses the extent of the flow of water through the spray nozzle according to vibration caused by water flowing through the mixer. The electronic flow sensing device is preferably located in a pocket formed in the mixer and preferably comprises a piezoelectric sensor embedded at least around its periphery in a settable material. A preferred construction of the mixer is also described.Type: GrantFiled: September 2, 2014Date of Patent: September 27, 2016Assignee: Arcaqua (Pty) Ltd.Inventors: Crispin Miles Russell, Mark Gregory Marshall, Clint Les Foster, Derek Hedley Rowles
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Patent number: 9392815Abstract: An ozone-based disinfecting device is provided comprising a mixer (2) having a generally hollow body with a water inlet for water under pressure, a spray nozzle (8) for generating a generally conical spray of water introduced by way of the water inlet, a contact chamber (7) communicating with a gas inlet (5) for ozone rich gases, and an outlet aperture (12) from the contact chamber. The outlet aperture is coaxial with the spray nozzle and axially spaced apart therefrom. The diameter of the outlet aperture corresponds substantially to the diameter of the conical spray at that position so that substantially no free space exists between the outside of the conical spray and the periphery of the outlet, in use. The contact chamber generally has a larger cross-sectional size than the diameter of the outlet aperture.Type: GrantFiled: May 11, 2012Date of Patent: July 19, 2016Assignee: Arcaqua (Pty) LtdInventors: Crispin Miles Russell, Mark Gregory Marshall
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Publication number: 20150191058Abstract: A device for Controlling pressure is disclosed which comprises a pump (28) having opposed pistons (30) which reciprocate in cylinders (40) carried by a casing (38). The pistons (30) are at the outer ends of rings (50) which are themselves fitted to an eccentric (26). The eccentric (28) is integral with a clutch plate (24). A second clutch plate (22) is fixed to a non-rotating axle (18) which itself forms part of a hanging counterweight structure (20). A piston (84) pushes the eccentric and clutch plate (26, 24) against the clutch plate (22) thereby to prevent the eccentric (26) tyre from rotating with the rings (50) upon a sensor detecting that a tyre has a low pressure in it. Stopping the eccentric initiates the pumping action of the pistons (30).Type: ApplicationFiled: June 10, 2013Publication date: July 9, 2015Inventors: Pierre van Wyk Becker, Mark Gregory Marshall
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Patent number: 8951477Abstract: An ozone-based disinfecting device is provided comprising a mixer having a generally hollow body with a water inlet for water under pressure, a spray nozzle for generating a generally conical spray of water introduced by way of the water inlet, a contact chamber communicating with a gas inlet for ozone rich gases, and an outlet aperture from the contact chamber that is coaxial with the spray nozzle and spaced apart therefrom. An electronic flow sensing device senses the extent of the flow of water through the spray nozzle according to vibration caused by water flowing through the mixer. The electronic flow sensing device is preferably located in a pocket formed in the mixer and preferably comprises a piezoelectric sensor embedded at least around its periphery in a settable material. A preferred construction of the mixer is also described.Type: GrantFiled: May 11, 2012Date of Patent: February 10, 2015Assignee: Arcaqua (Pty) Ltd.Inventors: Crispin Miles Russell, Mark Gregory Marshall, Clint Les Foster, Derek Hedley Rowles
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Publication number: 20140369891Abstract: An ozone-based disinfecting device is provided comprising a mixer having a generally hollow body with a water inlet for water under pressure, a spray nozzle for generating a generally conical spray of water introduced by way of the water inlet, a contact chamber communicating with a gas inlet for ozone rich gases, and an outlet aperture from the contact chamber that is coaxial with the spray nozzle and spaced apart therefrom. An electronic flow sensing device senses the extent of the flow of water through the spray nozzle according to vibration caused by water flowing through the mixer. The electronic flow sensing device is preferably located in a pocket formed in the mixer and preferably comprises a piezoelectric sensor embedded at least around its periphery in a settable material. A preferred construction of the mixer is also described.Type: ApplicationFiled: September 2, 2014Publication date: December 18, 2014Inventors: Crispin Miles Russell, Mark Gregory Marshall, Clint Les Foster, Derek Hedley Rowles
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Publication number: 20140178543Abstract: An ozone-based disinfecting device is provided comprising a mixer (2) having a generally hollow body with a water inlet for water under pressure, a spray nozzle (8) for generating a generally conical spray of water introduced by way of the water inlet, a contact chamber (7) communicating with a gas inlet (5) for ozone rich gases, and an outlet aperture (12) from the contact chamber. The outlet aperture is coaxial with the spray nozzle and axially spaced apart therefrom. The diameter of the outlet aperture corresponds substantially to the diameter of the conical spray at that position so that substantially no free space exists between the outside of the conical spray and the periphery of the outlet, in use. The contact chamber generally has a larger cross-sectional size than the diameter of the outlet aperture.Type: ApplicationFiled: May 11, 2012Publication date: June 26, 2014Applicant: Arcaqua (Pty) LtdInventors: Crispin Miles Russell, Mark Gregory Marshall
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Publication number: 20140154141Abstract: An ozone-based disinfecting device is provided comprising a mixer having a generally hollow body with a water inlet for water under pressure, a spray nozzle for generating a generally conical spray of water introduced by way of the water inlet, a contact chamber communicating with a gas inlet for ozone rich gases, and an outlet aperture from the contact chamber that is coaxial with the spray nozzle and spaced apart therefrom. An electronic flow sensing device senses the extent of the flow of water through the spray nozzle according to vibration caused by water flowing through the mixer. The electronic flow sensing device is preferably located in a pocket formed in the mixer and preferably comprises a piezoelectric sensor embedded at least around its periphery in a settable material. A preferred construction of the mixer is also described.Type: ApplicationFiled: May 11, 2012Publication date: June 5, 2014Applicant: Arcaqua (Pty) LtdInventors: Crispin Miles Russell, Mark Gregory Marshall, Clint Les Foster, Derek Hedley Rowles
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Publication number: 20080285963Abstract: Drying apparatus includes a housing defining an air inlet and a tortuous airflow passage leading to at least one air outlet. The outlet comprises two upright sets of louvres. An impeller is arranged to draw air into the inlet, through the airflow passage and to expel it via the outlet. A set of infrared emitting heating elements is located in the airflow passage behind a screen or glass panel and arranged both to radiate heat directly outwardly from the housing and to heat air in the airflow passage. Additional resistance heating elements are located in the airflow passage. The apparatus has a control system including a user interface, and is arranged to control the operation of the impeller and the two different kinds of heating elements in response to user input. The apparatus includes a heatsink associated with the infrared heating elements, which is located so that air passing through the airflow passage contacts the heatsink.Type: ApplicationFiled: November 22, 2006Publication date: November 20, 2008Inventors: Errol Stewart Hendrikse, Mark Gregory Marshall, Pierre Van Wyk Becker