Patents by Inventor Chidambaram Raghavan
Chidambaram Raghavan 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: 8904912Abstract: Waterjet systems including control valves and associated devices, systems, and methods are disclosed. A waterjet system configured in accordance with a particular embodiment includes a fluid source, a jet outlet, and a fluid conveyance extending from the fluid source to the jet outlet. The system further includes a control valve positioned along the fluid conveyance downstream from the fluid source and upstream from the jet outlet. The fluid conveyance has a first portion upstream from the control valve and a second portion downstream from the control valve. The control valve is configured to controllably reduce a pressure of fluid within the second portion of the fluid conveyance relative to a pressure of fluid within the first portion of the fluid conveyance. The first portion of the fluid conveyance is configured to accommodate movement of the jet outlet relative to the fluid source.Type: GrantFiled: August 16, 2013Date of Patent: December 9, 2014Assignee: OMAX CorporationInventors: Chidambaram Raghavan, John H. Olsen, Douglas Kelley, Olivier L. Tremoulet, Jr., Andre Kashierski, Rick Marks, Kevin A. Hay
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Publication number: 20140087631Abstract: Waterjet systems including control valves and associated devices, systems, and methods are disclosed. A waterjet system configured in accordance with a particular embodiment includes a fluid source, a jet outlet, and a fluid conveyance extending from the fluid source to the jet outlet. The system further includes a control valve positioned along the fluid conveyance downstream from the fluid source and upstream from the jet outlet. The fluid conveyance has a first portion upstream from the control valve and a second portion downstream from the control valve. The control valve is configured to controllably reduce a pressure of fluid within the second portion of the fluid conveyance relative to a pressure of fluid within the first portion of the fluid conveyance. The first portion of the fluid conveyance is configured to accommodate movement of the jet outlet relative to the fluid source.Type: ApplicationFiled: August 16, 2013Publication date: March 27, 2014Applicant: OMAX CorporationInventors: Chidambaram Raghavan, John H. Olsen, Douglas Kelley, Olivier L. Tremoulet, JR., Andre Kashierski, Rick Marks, Kevin A. Hay
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Patent number: 8430430Abstract: A fitting for collecting or distributing high-pressure fluid via fluid transmission lines is provided. The fitting includes a body, and a plurality of apertures formed in the body in a common plane, intersecting inside the body such that all of the apertures are in mutual fluid communication. Each of the apertures is configured to receive a threaded coupling member of a respective high-pressure transmission line. The fitting also includes first and second compression members positioned on opposing sides of the body and coupled thereto so as to exert a compressing bias to the body in an axis perpendicular to the common plane. The compression members each comprise a raised contact surface corresponding to the region of the body where the plurality of apertures meet, and through which the compressing bias is exerted. The fitting may be an elbow-fitting, a tee fitting, a cross-fitting, or some other configuration.Type: GrantFiled: May 21, 2010Date of Patent: April 30, 2013Assignee: Flow International CorporationInventors: Chidambaram Raghavan, Mohamed A. Hashish, Olivier L. Tremoulet, Jr., Shawn M. Callahan, Bruce M. Schuman
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Patent number: 8277206Abstract: A pressure enclosure includes a first component having an opening, a second component coupled to the first component in a position over the opening, a third component positioned between the first and second components and covering the opening, and a load chamber defined by a space between the second and third components and configured such that pressure in the load chamber biases the third component against the first component to seal the opening. The pressure enclosure may be a cylinder of a pump for pressurizing fluid or gas, with the first component a cylinder body, the second component an end cap and the third component a valve body, with the load chamber biasing the valve body against the cylinder body.Type: GrantFiled: April 10, 2008Date of Patent: October 2, 2012Assignee: Flow International CorporatioinInventors: Chidambaram Raghavan, Kraig T. Kostohris, Katherine M. Madden, Shawn M. Callahan, Sigurd C. Mordre, Mohamed A. Hashish, Olivier L. Tremoulet, Jr.
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Publication number: 20100224270Abstract: A fitting for collecting or distributing high-pressure fluid via fluid transmission lines is provided. The fitting includes a body, and a plurality of apertures formed in the body in a common plane, intersecting inside the body such that all of the apertures are in mutual fluid communication. Each of the apertures is configured to receive a threaded coupling member of a respective high-pressure transmission line. The fitting also includes first and second compression members positioned on opposing sides of the body and coupled thereto so as to exert a compressing bias to the body in an axis perpendicular to the common plane. The compression members each comprise a raised contact surface corresponding to the region of the body where the plurality of apertures meet, and through which the compressing bias is exerted. The fitting may be an elbow-fitting, a tee fitting, a cross-fitting, or some other configuration.Type: ApplicationFiled: May 21, 2010Publication date: September 9, 2010Applicant: Flow International CorporationInventors: Chidambaram Raghavan, Mohamed A. Hashish, Olivier L. Tremoulet, JR., Shawn M. Callahan, Bruce M. Schuman
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Patent number: 7748750Abstract: A fitting for collecting or distributing high-pressure fluid via fluid transmission lines is provided. The fitting includes a body, and a plurality of apertures formed in the body in a common plane, intersecting inside the body such that all of the apertures are in mutual fluid communication. The fitting also includes first and second compression members positioned on opposing sides of the body and coupled thereto so as to exert a compressing bias to the body in an axis perpendicular to the common plane. The compression members each comprise a raised contact surface corresponding to the region of the body where the plurality of apertures meet, and through which the compressing bias is exerted. The fitting may be an elbow-fitting, a tee fitting, a cross-fitting, or some other configuration.Type: GrantFiled: August 19, 2004Date of Patent: July 6, 2010Assignee: Flow International CorporationInventors: Chidambaram Raghavan, Mohamed A. Hashish, Olivier L. Tremoulet, Jr., Shawn M. Callahan, Bruce M. Schuman
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Patent number: 7635289Abstract: A collision detection sensor for a waterjet system provides a signal in the event the device approaches to within a selected distance of an obstruction in the plane of the working surface. An annular pressure switch lying in a first plane provides the signal when radial pressure is applied to a perimeter of the pressure switch via an annular trigger skirt, the trigger skirt applying the radial pressure in response to a collision of the device with an obstacle.Type: GrantFiled: April 5, 2007Date of Patent: December 22, 2009Assignee: Flow International CorporationInventors: Felice M. Sciulli, Robert J. Mann, Michael Knaupp, Charles M. Wakefield, Chidambaram Raghavan, Andrew P. Sterne
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Publication number: 20080264493Abstract: A pressure enclosure includes a first component having an opening, a second component coupled to the first component in a position over the opening, a third component positioned between the first and second components and covering the opening, and a load chamber defined by a space between the second and third components and configured such that pressure in the load chamber biases the third component against the first component to seal the opening. The pressure enclosure may be a cylinder of a pump for pressurizing fluid or gas, with the first component a cylinder body, the second component an end cap and the third component a valve body, with the load chamber biasing the valve body against the cylinder body.Type: ApplicationFiled: April 10, 2008Publication date: October 30, 2008Applicant: Flow Internationa CorporationInventors: Chidambaram Raghavan, Kraig T. Kostohris, Katherine M. Madden, Shawn M. Callahan, Sigurd C. Mordre, Mohamed A. Hashish, Olivier L. Tremoulet
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Patent number: 7367789Abstract: A pressure enclosure includes a first component having an opening, a second component coupled to the first component in a position over the opening, a third component positioned between the first and second components and covering the opening, and a load chamber defined by a space between the second and third components and configured such that pressure in the load chamber biases the third component against the first component to seal the opening. The pressure enclosure may be a cylinder of a pump for pressurizing fluid or gas, with the first component a cylinder body, the second component an end cap and the third component a valve body, with the load chamber biasing the valve body against the cylinder body.Type: GrantFiled: October 1, 2003Date of Patent: May 6, 2008Assignee: Flow International CorporationInventors: Chidambaram Raghavan, Kraig T. Kostohris, Katherine M. Madden, Shawn M. Callahan, Sigurd C. Mordre, Mohamed A. Hashish, Olivier L. Tremoulet, Jr.
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Patent number: 7331842Abstract: A contour follower includes a plurality of sensors spaced around a waterjet nozzle, each of the sensors being configured to measure a distance between a working surface and a first plane, perpendicular to a longitudinal axis of the nozzle. The sensors may include hall-effect sensors lying in the first plane and magnets lying in a second plane, parallel to the working surface. A detecting circuit processes signals from the sensors to determine an angle of the working surface, relative to the first plane, and a distance between an aperture of the nozzle and the working surface. A collision detection sensor provides a signal in the event the device approaches to within a selected distance of an obstruction in the plane of the working surface. A shield plate blocks and dampens secondary spray-back of cutting fluid occurring at low angles above the working surface.Type: GrantFiled: August 19, 2004Date of Patent: February 19, 2008Assignee: Flow International CorporationInventors: Felice M. Sciulli, Andreas Meyer, Robert J. Mann, Michael Knaupp, Charles M. Wakefield, Chidambaram Raghavan, Andrew P. Sterne, Glenn A. Erichsen
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Publication number: 20070190901Abstract: A contour follower includes a plurality of sensors spaced around a waterjet nozzle, each of the sensors being configured to measure a distance between a working surface and a first plane, perpendicular to a longitudinal axis of the nozzle. The sensors may include hall-effect sensors lying in the first plane and magnets lying in a second plane, parallel to the working surface. A detecting circuit processes signals from the sensors to determine an angle of the working surface, relative to the first plane, and a distance between an aperture of the nozzle and the working surface. A collision detection sensor provides a signal in the event the device approaches to within a selected distance of an obstruction in the plane of the working surface. A shield plate blocks and dampens secondary spray-back of cutting fluid occurring at low angles above the working surface.Type: ApplicationFiled: April 5, 2007Publication date: August 16, 2007Applicant: Flow International CorporationInventors: Felice Sciulli, Andreas Meyer, Robert Mann, Michael Knaupp, Charles Wakefield, Chidambaram Raghavan, Andrew Sterne, Glenn Erichsen
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Publication number: 20070190900Abstract: A contour follower includes a plurality of sensors spaced around a waterjet nozzle, each of the sensors being configured to measure a distance between a working surface and a first plane, perpendicular to a longitudinal axis of the nozzle. The sensors may include hall-effect sensors lying in the first plane and magnets lying in a second plane, parallel to the working surface. A detecting circuit processes signals from the sensors to determine an angle of the working surface, relative to the first plane, and a distance between an aperture of the nozzle and the working surface. A collision detection sensor provides a signal in the event the device approaches to within a selected distance of an obstruction in the plane of the working surface. A shield plate blocks and dampens secondary spray-back of cutting fluid occurring at low angles above the working surface.Type: ApplicationFiled: April 5, 2007Publication date: August 16, 2007Applicant: Flow International CorporationInventors: Felice Sciulli, Andreas Meyer, Robert Mann, Michael Knaupp, Charles Wakefield, Chidambaram Raghavan, Andrew Sterne, Glenn Erichsen
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Publication number: 20070184758Abstract: A contour follower includes a plurality of sensors spaced around a waterjet nozzle, each of the sensors being configured to measure a distance between a working surface and a first plane, perpendicular to a longitudinal axis of the nozzle. The sensors may include hall-effect sensors lying in the first plane and magnets lying in a second plane, parallel to the working surface. A detecting circuit processes signals from the sensors to determine an angle of the working surface, relative to the first plane, and a distance between an aperture of the nozzle and the working surface. A collision detection sensor provides a signal in the event the device approaches to within a selected distance of an obstruction in the plane of the working surface. A shield plate blocks and dampens secondary spray-back of cutting fluid occurring at low angles above the working surface.Type: ApplicationFiled: April 5, 2007Publication date: August 9, 2007Applicant: Flow International CorporationInventors: Felice Sciulli, Andreas Meyer, Robert Mann, Michael Knaupp, Charles Wakefield, Chidambaram Raghavan, Andrew Sterne, Glenn Erichsen
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Publication number: 20070180939Abstract: A contour follower includes a plurality of sensors spaced around a waterjet nozzle, each of the sensors being configured to measure a distance between a working surface and a first plane, perpendicular to a longitudinal axis of the nozzle. The sensors may include hall-effect sensors lying in the first plane and magnets lying in a second plane, parallel to the working surface. A detecting circuit processes signals from the sensors to determine an angle of the working surface, relative to the first plane, and a distance between an aperture of the nozzle and the working surface. A collision detection sensor provides a signal in the event the device approaches to within a selected distance of an obstruction in the plane of the working surface. A shield plate blocks and dampens secondary spray-back of cutting fluid occurring at low angles above the working surface.Type: ApplicationFiled: April 5, 2007Publication date: August 9, 2007Applicant: Flow International CorporationInventors: Felice Sciulli, Andreas Meyer, Robert Mann, Michael Knaupp, Charles Wakefield, Chidambaram Raghavan, Andrew Sterne, Glenn Erichsen
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Publication number: 20060040590Abstract: A contour follower includes a plurality of sensors spaced around a waterjet nozzle, each of the sensors being configured to measure a distance between a working surface and a first plane, perpendicular to a longitudinal axis of the nozzle. The sensors may include hall-effect sensors lying in the first plane and magnets lying in a second plane, parallel to the working surface. A detecting circuit processes signals from the sensors to determine an angle of the working surface, relative to the first plane, and a distance between an aperture of the nozzle and the working surface. A collision detection sensor provides a signal in the event the device approaches to within a selected distance of an obstruction in the plane of the working surface. A shield plate blocks and dampens secondary spray-back of cutting fluid occurring at low angles above the working surface.Type: ApplicationFiled: August 19, 2004Publication date: February 23, 2006Applicant: Flow International CorporationInventors: Felice Sciulli, Andreas Meyer, Robert Mann, Michael Knaupp, Charles Wakefield, Chidambaram Raghavan, Andrew Sterne, Glenn Erichsen
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Publication number: 20060038399Abstract: A fitting for collecting or distributing high-pressure fluid via fluid transmission lines is provided. The fitting includes a body, and a plurality of apertures formed in the body in a common plane, intersecting inside the body such that all of the apertures are in mutual fluid communication. Each of the apertures is configured to receive a threaded coupling member of a respective high-pressure transmission line. The fitting also includes first and second compression members positioned on opposing sides of the body and coupled thereto so as to exert a compressing bias to the body in an axis perpendicular to the common plane. The compression members each comprise a raised contact surface corresponding to the region of the body where the plurality of apertures meet, and through which the compressing bias is exerted. The fitting may be an elbow-fitting, a tee fitting, a cross-fitting, or some other configuration.Type: ApplicationFiled: August 19, 2004Publication date: February 23, 2006Applicant: Flow International CorporationInventors: Olivier Tremoulet, Chidambaram Raghavan, Shawn Callahan
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Publication number: 20050074350Abstract: A pressure enclosure includes a first component having an opening, a second component coupled to the first component in a position over the opening, a third component positioned between the first and second components and covering the opening, and a load chamber defined by a space between the second and third components and configured such that pressure in the load chamber biases the third component against the first component to seal the opening. The pressure enclosure may be a cylinder of a pump for pressurizing fluid or gas, with the first component a cylinder body, the second component an end cap and the third component a valve body, with the load chamber biasing the valve body against the cylinder body.Type: ApplicationFiled: October 1, 2003Publication date: April 7, 2005Applicant: Flow International CorporationInventors: Chidambaram Raghavan, Kraig Kostohris, Katherine Madden, Shawn Callahan, Sigurd Mordre, Mohamed Hashish, Olivier Tremoulet
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Patent number: 6804459Abstract: An assembly for changing the temperature of ultrahigh-pressure fluid as it flows through ultrahigh-pressure tubing includes several thermally conductive blocks. Each block has a first bore through which the ultrahigh-pressure tubing passes, and a second bore containing a source of heating or cooling. Alternatively, resistance heating is used to increase the temperature of the ultrahigh-pressure fluid, by coupling electrodes to the outer surface of the tubing. The ultrahigh-pressure fluid is heated or cooled after it is pressurized, and is then discharged from the ultrahigh-pressure tubing at a selected temperature for use. For example, the ultrahigh-pressure fluid at a selected temperature may be discharged through a nozzle to form an ultrahigh-pressure fluid jet to cut or clean any desired surface or object, or it may be discharged to a pressure vessel to pressure treat a substance.Type: GrantFiled: June 15, 2001Date of Patent: October 12, 2004Assignee: Flow International CorporationInventors: Chidambaram Raghavan, Edmund Y. Ting, Bruce M. Schuman, Mohamed A. Hashish
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Publication number: 20040108000Abstract: A check valve for use in a high-pressure pump is provided with a check valve seat having a frustoconical end region that engages a tapered surface provided on an outlet adaptor. By providing a conical interface between the check valve seat and the outlet adaptor, a compressive stress is placed on the valve seat, thereby dramatically increasing the fatigue life of the check valve.Type: ApplicationFiled: December 6, 2002Publication date: June 10, 2004Applicant: Flow International CorporationInventors: Chidambaram Raghavan, Olivier L. Tremoulet, Katherine M. Madden
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Patent number: D515675Type: GrantFiled: December 27, 2001Date of Patent: February 21, 2006Assignee: Flow International CorporationInventors: Olivier L. Tremoulet, Jr., Lennart Svensson, Chidambaram Raghavan, Mohamed Hashish