Patents by Inventor John MacGregor
John MacGregor 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: 10246958Abstract: A valve assembly for use controlling flow of fluid into a drill pipe, the valve assembly having a valve body, a valve member and a valve seat, wherein a) the valve body has a main passage b) the valve member is movable between a closed position in which the valve member engages with a seat face of the valve seat to substantially prevent flow of fluid along the main passage, and an open position in which the valve member is spaced from the seat face, c) the valve seat is a separate part to the valve body.Type: GrantFiled: March 5, 2014Date of Patent: April 2, 2019Assignee: MANAGED PRESSURE OPERATIONS PTE, LTD.Inventors: Alexander John MacGregor, Christian Leuchtenberg, James Bisset
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Publication number: 20190016319Abstract: An aircraft landing gear assembly (112) including a shock absorber strut (114), a bogie (120), a link assembly (124), and a movement detector (132). The shock absorber strut includes an upper and a lower telescoping parts (116, 118), the upper part being connectable to the airframe of an aircraft and the lower part being connected to the bogie. The link assembly extends between the upper and lower telescoping parts. The movement detector is arranged to detect movement of the link assembly relative to the bogie. The movement detector includes: a piston (338) slidably received within a cylinder (336), fluid which flows as a result of relative movement between the piston and the cylinder; and a pressure transducer (336) arranged to sense a local pressure change in the fluid.Type: ApplicationFiled: June 27, 2018Publication date: January 17, 2019Inventors: Robert Ian THOMPSON, Keith John MACGREGOR
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Publication number: 20180154027Abstract: A method for inactivating medically important Gram-positive bacteria including Methicillin-resistant Staphylococcus aureus (MRSA), Coagulase-Negative Staphylococcus (CONS), Streptococcus, Enterococcus and Clostridium species, comprising exposure to visible light, and in particular light within the wavelength range 400-500 nm.Type: ApplicationFiled: November 8, 2017Publication date: June 7, 2018Inventors: John Galloway Anderson, Michelle Maclean, Gerald Alexander Woolsey, Scott John MacGregor
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Publication number: 20180051536Abstract: A riser pressure relief apparatus includes a pressure relief valve with a valve member, an actuator, and a pilot valve assembly connected to a pressurized fluid. The valve member moves between a first position, which prevents a fluid flow through the side port, and a second position, which permits the flow. The actuator includes an open port and moves the valve member from the first to the second position by supplying the pressurized fluid to the open port. The pilot valve assembly moves between a first configuration, which prevents a flow of the pressurized fluid to the open port, and a second configuration, which permits the flow. A valve part of the pilot valve assembly moves from a first to a second position based on a fluid pressure in the riser, which causes the pilot valve assembly to move from the first to the second configuration or vice versa.Type: ApplicationFiled: April 13, 2016Publication date: February 22, 2018Applicant: MANAGED PRESSURE OPERATIONS PTE. LTD.Inventors: ALEXANDER JOHN MACGREGOR, CHRISTAN LEUCHTENBERG, BRIAN PICCOLO, HENRY PINKSTONE, BRUCE GARLICK
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Publication number: 20170370171Abstract: A pressure containment device includes a sealing element. The sealing element includes a longitudinal axis, a substantially annular cross-section arranged perpendicular to the longitudinal axis, a radially inwardly facing interior surface having a plurality of recesses, a radially outwardly facing exterior surface, a first end surface having a plurality of recesses, and a second end surface. The first end surface and the second end surface are each arranged to extend from the radially inwardly facing interior surface to the radially outwardly facing exterior surface. The first end surface and the second end surface are arranged at opposite ends of the sealing element.Type: ApplicationFiled: November 17, 2015Publication date: December 28, 2017Applicant: MANAGED PRESSURE OPERATIONS PTE. LTD.Inventors: CHRISTIAN LEUCHTENBERG, ALEXANDER JOHN MACGREGOR, GEORGE MICHAUD, SARAVANAN SUNDARAMOORTHY
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Patent number: 9841714Abstract: A social networking system user may request physical prints of digital photographs stored in connection with the user's user profile on the social networking system. The physical prints are generated by a photograph developer, such as a retail store, and retrieved by the user. The user may request the physical prints from an application executing on a user device that allows the user to identify social context information associated with a digital photograph for inclusion on the physical print. The social networking system may notify users connected to the user and/or to the digital image of the physical print generation.Type: GrantFiled: February 5, 2013Date of Patent: December 12, 2017Assignee: Facebook, Inc.Inventors: Keenan Pridmore, Philip John MacGregor, IV, Stephen Biddle
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Patent number: 9839706Abstract: A method for inactivating medically important Gram-positive bacteria including Methicillin-resistant Staphylococcus aureus (MRSA), Coagulase-Negative Staphylococcus (CONS), Streptococcus, Enterococcus and Clostridium species, comprising exposure to visible light, and in particular light within the wavelength range 400-500 nm.Type: GrantFiled: March 13, 2015Date of Patent: December 12, 2017Assignee: University of StrathclydeInventors: John Galloway Anderson, Michelle Maclean, Gerald Alexander Woolsey, Scott John MacGregor
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Patent number: 9779157Abstract: A method for bundling event memories in a social networking system. The method includes identifying a first plurality of user-submitted content items posted to the social networking system that are related to an event involving a plurality of users. The social networking system aggregates the first plurality of user-submitted content items into a bundled event memory, and transmits the bundled event memory to at least some of a plurality of user devices to be presented to at least some of the plurality of users, wherein the plurality of users utilize the plurality of user devices to communicate with the social networking system.Type: GrantFiled: August 12, 2016Date of Patent: October 3, 2017Assignee: FACEBOOK, INC.Inventors: Keenan Pridmore, Philip John MacGregor, IV
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Patent number: 9719310Abstract: A connector assembly for connecting a hose to a tubular element. The connector assembly includes a housing, a hose connector, and a latch. The housing encloses a main passage which is parallel to a longitudinal axis of the housing and which has a side passage extending through the housing from an exterior of the housing into the main passage. The side passage extends through a connector tube mounted on an exterior of the housing. A hose connector is secured to an end of the hose and engages with the connector tube to connect the hose to the tubular element. The hose connector comprises a pipe portion which mates with the connector tube to connect an interior of the hose to the side passage. The latch urges the connector tube and the pipe portion into engagement and prevents a separation thereof.Type: GrantFiled: December 17, 2014Date of Patent: August 1, 2017Assignee: MANAGED PRESSURE OPERATIONS PTE. LTD.Inventors: Alexander John MacGregor, Ted Jee Voon
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Patent number: 9605504Abstract: A pressure containment device for sealing around a tubular body comprising an actuator assembly and a seal assembly, the actuator assembly being operable to engage with the seal assembly to prevent significant rotation of the seal assembly with respect to the actuator assembly and to force the seal assembly into sealing engagement with a tubular body mounted in the pressure containment device, the seal assembly comprising a tubular seal sleeve having a radially inward portion made from a non-elastomeric polymer, and a radially outward portion made from an elastomer.Type: GrantFiled: October 12, 2011Date of Patent: March 28, 2017Assignee: MANAGED PRESSURE OPERATIONS PTE LTDInventors: Christian Leuchtenberg, Alexander John MacGregor
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Publication number: 20160348449Abstract: A connector assembly for connecting a hose to a tubular element. The connector assembly includes a housing, a hose connector, and a latch. The housing encloses a main passage which is parallel to a longitudinal axis of the housing and which has a side passage extending through the housing from an exterior of the housing into the main passage. The side passage extends through a connector tube mounted on an exterior of the housing. A hose connector is secured to an end of the hose and engages with the connector tube to connect the hose to the tubular element. The hose connector comprises a pipe portion which mates with the connector tube to connect an interior of the hose to the side passage. The latch urges the connector tube and the pipe portion into engagement and prevents a separation thereof.Type: ApplicationFiled: December 17, 2014Publication date: December 1, 2016Applicant: MANAGED PRESSURE OPERATIONS PTE. LTD.Inventors: ALEXANDER JOHN MACGREGOR, TED JEE VOON
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Publication number: 20160350397Abstract: A method for bundling event memories in a social networking system. The method includes identifying a first plurality of user-submitted content items posted to the social networking system that are related to an event involving a plurality of users. The social networking system aggregates the first plurality of user-submitted content items into a bundled event memory, and transmits the bundled event memory to at least some of a plurality of user devices to be presented to at least some of the plurality of users, wherein the plurality of users utilize the plurality of user devices to communicate with the social networking system.Type: ApplicationFiled: August 12, 2016Publication date: December 1, 2016Inventors: Keenan Pridmore, Philip John MacGregor, IV
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Patent number: 9506300Abstract: A slip joint (10) having a tubular inner barrel (11b) and a tubular outer barrel (11a), the inner barrel (11b) lying at least partially within the outer barrel (11a), the slip joint further comprising a sealing assembly (12a), (12b), (12c) which is operable to provide a substantially fluid tight seal between two sealing surfaces comprising an interior surface of the outer barrel 11a and an exterior surface of the inner barrel (11b), the sealing assembly (12a), (12b), (12c) including an actuator (20) and a seal (46), the actuator (20) being movable to push the seal (46) into engagement with one of the sealing surfaces.Type: GrantFiled: April 20, 2012Date of Patent: November 29, 2016Assignee: MANAGED PRESSURE OPERATIONS PTE LTD.Inventors: Christian Leuchtenberg, Alexander John Macgregor
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Patent number: 9488031Abstract: A blow out preventer (BOP) for use in the drilling of a wellbore into a subterranean fluid reservoir and/or the production of fluid is provided. The BOP includes a housing having longitudinal axis and being divided into a first housing part and a second housing part, movement of the first housing part relative to the second housing part being prevented by fasteners, each fastener including a shaft which extends through a fastener receiving passage provided in the first housing part into a fastener receiving passage provided in the second housing part. The housing is further provided with fluid flow passages which extend from the first part of the housing to the second part of the housing, the fluid flow passages being interspersed between fastener receiving passages.Type: GrantFiled: March 21, 2012Date of Patent: November 8, 2016Assignee: MANAGED PRESSURE OPERATIONS PTE. LTD.Inventors: Christian Leuchtenberg, Alexander John MacGregor
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Patent number: 9450907Abstract: A method for bundling event memories in a social networking system. The method includes identifying a first plurality of user-submitted content items posted to the social networking system that are related to an event involving a plurality of users. The social networking system aggregates the first plurality of user-submitted content items into a bundled event memory, and transmits the bundled event memory to at least some of a plurality of user devices to be presented to at least some of the plurality of users, wherein the plurality of users utilize the plurality of user devices to communicate with the social networking system.Type: GrantFiled: March 14, 2013Date of Patent: September 20, 2016Assignee: FACEBOOK, INC.Inventors: Keenan Pridmore, Philip John MacGregor, IV
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Patent number: 9410886Abstract: An optical absorption gas sensor for detecting an analyte gas comprises a gas sample receiving chamber, at least one light emitting diode (LED) and a photodiode or other photosensor. A plurality of light pulses are generated by passing pulses of current through the at least one LED. The current through the at least one LED is measured a plurality of times during each pulse and taken into account when generating a compensated output signal. The transfer ratio between LED current and photodiode output signal is calculated a plurality of times during each pulse. An ADC measures the LED and photodiode currents alternately. The LED pulses are generated by inductor discharge flyback and the period of time for which current is supplied to the inductor prior to each pulse is selected so that the photodiode output current is at an optimal region within the input range of the ADC. At least the temperature of the at least one LED is measured and taken into account when generating the compensated output signal.Type: GrantFiled: October 28, 2011Date of Patent: August 9, 2016Assignee: GAS SENSING SOLUTIONS LTD.Inventors: Calum John Macgregor, Desmond Robert Gibson
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Patent number: 9348878Abstract: An iterative approach to detect outliers may automatically detect outliers in a data set. The iterative approach may include calculating a mean and an average deviation for a list. The iterative approach may further include calculating the deviations of values of a list if the average deviation is not zero. Any values where the calculated deviation of the point or value is greater than the mean may be selected. The selected points may be set as a second list. The second list may be used by the iterative approach until no points are selected for the second list. The previous list is the set of outliers from the data set.Type: GrantFiled: December 16, 2013Date of Patent: May 24, 2016Assignee: SAP SEInventors: Unmesh Sreedharan, Ajay Kumar Gupta, John MacGregor, Chandrashekar Vasudevan
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Patent number: 9285306Abstract: An optical absorption gas sensor has an LED light source and a photodiode light detector, a temperature measuring device for measuring the LED temperature and a temperature measuring device for measuring the photodiode temperature. The sensor is calibrated by measuring the response of photodiode current at zero analyte gas concentration and at a reference analyte gas concentration. From these measurement, calibration data taking into account the effect of photodiode temperature on the sensitivity of the photodiode and, independently, the effect of changes in the spectrum of light output by the LED on the light detected by the photodiode with LED temperature can be obtained. Calibration data is written to memory in the gas sensor and in operation of the gas sensor, the output is compensated for both LED and photodiode temperature. The LED and photodiode can therefore be relatively far apart and operate at significantly different temperatures allowing greater freedom of optical pathway design.Type: GrantFiled: October 28, 2011Date of Patent: March 15, 2016Assignee: GAS SENSING SOLUTIONS LTD.Inventors: Calum John MacGregor, Desmond Robert Gibson
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Publication number: 20160002993Abstract: A valve assembly for use controlling flow of fluid into a drill pipe, the valve assembly having a valve body, a valve member and a valve seat, wherein a) the valve body has a main passage b) the valve member is movable between a closed position in which the valve member engages with a seat face of the valve seat to substantially prevent flow of fluid along the main passage, and an open position in which the valve member is spaced from the seat face, c) the valve seat is a separate part to the valve body.Type: ApplicationFiled: March 5, 2014Publication date: January 7, 2016Applicant: MANAGED PRESSURE OPERATIONS PTE. LTD.Inventors: Alexander John MACGREGOR, Christian LEUCHTENBERG, James BISSET
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Publication number: 20150369000Abstract: A pressure containment device for sealing around a tubular body comprising an actuator assembly and a seal assembly, the actuator assembly being operable to engage with the seal assembly to prevent significant rotation of the seal assembly with respect to the actuator assembly and to force the seal assembly into sealing engagement with a tubular body mounted in the pressure containment device, the seal assembly comprising a tubular seal sleeve having a radially inward portion made from a non-elastomeric polymer, and a radially outward portion made from an elastomer.Type: ApplicationFiled: October 12, 2011Publication date: December 24, 2015Applicant: Managed Pressure Operations PTE LtdInventors: Christian Leuchtenberg, Alexander John MacGregor