Varney, GB
Brian Varney, Whitley GB
Patent application number | Description | Published |
---|---|---|
20140123940 | DIAGNOSTIC FOR ENGINE CAM PROFILE SWITCHING SYSTEM - A momentary diagnostic for determining correct operation of a cam profile switching system of an internal combustion engine by calculation of changes in cylinder bank to bank air mass flow ratios: operating said engine in one condition of the cam profile switching system; providing for a first cylinder subset the inlet fuel flow and the corresponding oxygen content of the exhaust flow, and calculating the mass of air passing through the first cylinder subset in a defined time period; providing for a second cylinder subset the inlet fuel flow and the corresponding oxygen content of the exhaust flow; calculating the mass of air passing through the second cylinder subset in said defined time period; comparing the mass air flow the oxygen content for the first and second cylinder subsets to give a standard ratio; momentarily forcing the cam profile switching system of one of said cylinder subsets to an alternative condition; re-calculating providing the corresponding mass of air oxygen content passing through the first and second cylinder subsets; and comparing said recalculated air flows oxygen contents to give a revised ratio; and comparing said standard ratio and revised ratio. | 05-08-2014 |
20140202425 | EMISSIONS CONTROL DURING CAM PROFILE SWITCHING DIAGNOSTIC OPERATION - A diagnostic routine momentarily forces an engine to an alternative operating condition, and at the same time adjust fuelling of the engine so as to be appropriate to the alternative operating condition ( | 07-24-2014 |
20150369700 | DIAGNOSIS OF THE CONDITION OF A PARTICLE FILTER - An on-board diagnostic for a particle filter of a vehicle exhaust system records repeating data about flow and pressure around the particle filter. Data is recorded in virtual data bins having successive thresholds or filters within a numerical scale. Each data point is typically recorded in several bins to permit a rapid calculation of averaged data for use in the diagnostic. Sensitivity of less frequently recorded data is preserved, whilst giving quickly delivery of a result from the diagnostic. | 12-24-2015 |
Brian Varney, Whitley, Coventry, Warwickshire GB
Patent application number | Description | Published |
---|---|---|
20140343822 | ENGINE DIAGNOSTIC WITH EXHAUST GAS SAMPLING DELAY - A diagnostic method comprising the steps of: first sampling exhaust gas; implementing a forced change of engine operating condition; second sampling exhaust gas associated with said change at a delay after initiating said change, said second sampling being at a location corresponding to said delay; and comparing said first sampling and second sampling to detect a change in exhaust constituents. | 11-20-2014 |
Brian Varney, Southam GB
Patent application number | Description | Published |
---|---|---|
20140123943 | ENGINE AIR TO FUEL RATIO CYLINDER IMBALANCE DIAGNOSTIC - A diagnostic for identifying cylinder to cylinder air/fuel ratio faults of an engine having closed loop fuel control. Air mass flow is accumulated for a plurality of load bands on the engine load/speed map, and for each load band a rich/lean air fuel ratio is determined at a mass threshold. This threshold data is processed and compared with fixed data to determine whether any cylinder of an engine is experiencing an air/fuel ratio fault which is substantially different to the remainder. | 05-08-2014 |
Kelvin J. Varney, Monmouthshire GB
Patent application number | Description | Published |
---|---|---|
20100305563 | ELECTROSURGICAL SYSTEM - An electrosurgical system includes a first component ( | 12-02-2010 |
Kelvin John Varney, Abergavenny GB
Patent application number | Description | Published |
---|---|---|
20140214021 | ELECTROSURGICAL ELECTRODE - An electrode is for use in an electrosurgical probe, the electrode having two arms defining a longitudinal direction. The electrode also includes a loop depending from the two arms and defining a cutting area within the loop, and a vaporisation member attached to one side of the loop. The vaporisation member is such that it does not occlude the cutting area and yet presents a substantial profile when the electrode is moved in the longitudinal direction. The arrangement is such that when the electrode is moved in a first longitudinal direction, the loop is capable of resecting a sample of tissue. When the electrode is moved in the opposite longitudinal direction, the vaporisation member is capable of vaporising tissue adjacent thereto to form a groove therein. | 07-31-2014 |
20150305795 | ELECTROSURGICAL PLASMA APPARATUS AND SYSTEM - An electrosurgical apparatus for coagulating tissue includes an elongated tube having a tubular wall and a proximal end and a distal end, and constituting a conduit though which ionisable gas can be supplied to the distal end of the tube. The tube includes one or more apertures in the tube such that the ionisable gas is capable of exiting the tube in the region of the distal end of the tube. A braided tubular component is associated with the wall of the tube, and is connected to a source of electrosurgical energy, such that the braided tubular component can form part of an electrode assembly for ionising the ionisable gas exiting the one or more apertures. | 10-29-2015 |
Mark Varney, Bishopstoke GB
Patent application number | Description | Published |
---|---|---|
20150377821 | Gas Sensor - A sensor for sensing a target substance in a target substance is provided, the sensor comprising: a sensing element disposed to be exposed to the gas stream, the sensing element comprising: a working electrode; a counter electrode; and a layer of ion exchange material extending between the working electrode and the counter-electrode; whereby contact of the ion exchange layer with the gas stream firms an electrical contact between the working and counter electrodes. | 12-31-2015 |
Mark Varney, Surrey GB
Patent application number | Description | Published |
---|---|---|
20100133120 | Electrochemical Sensor - An electrochemical sensor ( | 06-03-2010 |
Mark Varney, Surry GB
Patent application number | Description | Published |
---|---|---|
20100050735 | Gas Sensor - A sensor for sensing a target substance in a gas stream is provided, the sensor comprising: a sensing element disposed to be exposed to the gas stream, the sensing element comprising: a working electrode; a counter electrode; and a layer of ion exchange material extending between the working electrode and the counter electrode; whereby contact of the ion exchange layer with the gas stream forms an electrical contact between the working and counter electrodes. | 03-04-2010 |
Mark Varney, Hampshire GB
Patent application number | Description | Published |
---|---|---|
20090054798 | RESPIRATION MONITOR AND METHOD OF ITS OPERATION - An apparatus for monitoring the respiration of a subject, the apparatus comprises means for detecting the concentration of each of oxygen, carbon dioxide and nitric oxide in an inspired and/or exhaled gaseous stream of a subject; and a display for displaying the concentration of each of oxygen, carbon dioxide and nitric oxide. A method for monitoring the respiration of a subject comprises analysing the composition of the inspired and/or exhaled gas of the subject and determining the concentration of carbon dioxide, oxygen and nitric oxide in the gas; and displaying the results of the analysis on a display to provide an indication of the respiratory state of the subject. A method of determining the extent of resuscitation of a patient comprises measuring the concentration of carbon dioxide, oxygen and nitric oxide in the inspired gas stream and/or exhaled gas stream of the subject. | 02-26-2009 |
20090272656 | Gas Sensor - A method for the determination of the carbon dioxide content of an exhaled gas stream is provided, the method comprising measuring the water vapour content of the exhaled gas stream, and determining the concentration of carbon dioxide in the exhaled gas stream from the measured water vapour content. A particular method comprises causing the gas stream to impinge on a sensing element comprising a working electrode and a counter electrode; applying an electric potential across the working electrode and counter electrode; measuring the current flowing between the working electrode and counter electrode as a result of the applied potential; and determining from the measured current flow an indication of the concentration of the water vapour in the gas stream. A sensor is also described. | 11-05-2009 |
20100175699 | RESPIRATORY SENSOR - A sensor assembly for monitoring the respiration pattern of a subject is disclosed, the sensor comprising a sensor element for exposing to a gas stream exhaled by the subject comprising a first electrode, a second electrode and an active layer extending between the first and second electrodes to provide an electrical path therebetween, the sensor element being responsive to the concentration of water vapour in the gas stream exhaled by the subject, whereby the conductivity of the path between the electrodes varies in response to changes in the concentration of water vapour; a processor for determining the pattern of respiration of the subject; and means for displaying information relating to the determined respiration pattern to a user. The sensor assembly is particular suitable for measuring the respiration rate and/or depth of respiration of the subject. The sensor and method find particular application in the diagnosis and treatment of sleep apnea. | 07-15-2010 |
20100264042 | METHOD OF MONITORING GAS COMPOSITION - A method of determining the general or a specific condition of a subject is disclosed, the method comprising measuring the concentration of each of a plurality of components in a single sample of the gas stream exhaled by the subject; and generating information regarding the concentration of each of the plurality of components such that the concentrations of the components are directly comparable. The method is particularly suitable for assessing the condition of the respiratory system of a subject. The method preferably employs electrochemical sensors to measure the concentration of the target components in the exhaled gas stream. | 10-21-2010 |
Mark Sinclair Varney, Bedfordshire GB
Patent application number | Description | Published |
---|---|---|
20160136367 | RESPIRATORY THERAPY APPARATUS AND METHODS - A vibratory PEP respiratory therapy device ( | 05-19-2016 |
Mark Sinclair Varney, Danderyd GB
Patent application number | Description | Published |
---|---|---|
20080262370 | Gas sensor - A method of determining the respiratory function of a subject is disclosed, the method comprising measuring the concentration of water vapour in the gas stream exhaled by the subject, and from the measured water vapour concentration determining the respiratory function of the subject. Mathematical techniques for analyzing the data obtained from the measurement of concentrations of gaseous components in an exhaled gas stream are also disclosed and their use in determining the lung function of a subject. | 10-23-2008 |
Mark Sinclair Varney, Hampshire GB
Patent application number | Description | Published |
---|---|---|
20080217173 | Gas Sensor - A sensor for detecting a target substance, in particular carbon dioxide, in a gas stream comprises a sensing element ( | 09-11-2008 |
Mark Sinclair Varney, Lymington GB
Patent application number | Description | Published |
---|---|---|
20110288430 | Gas Sensor - A sensor and method for detecting a target substance, particularly CO | 11-24-2011 |
Mark Sinclair Varney, Bishopstoke GB
Patent application number | Description | Published |
---|---|---|
20120165693 | Detection of Respiratory System Lesions - Humidity profiles of exhaled air of individuals obtained using a sensor to detect water vapour content or temperature versus time of exhalation may exhibit an irregularity indicative of a space-occupying respiratory system lesion. Detection of such irregularities provides an inexpensive and rapid means of pre-screening individuals for lung cancer diagnosis, and is applicable even to individuals with other respiratory disorders such as asthma and COPD. | 06-28-2012 |