Patents by Inventor Raveendran Vaidhyanathan

Raveendran Vaidhyanathan 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).

  • Patent number: 7941885
    Abstract: A method for operating a horizontal axis washing machine having a tub with a drum rotatably mounted in the tub and configured to hold a fabric load comprises introducing liquid into the drum to wet the fabric load and spinning the drum to distribute the fabric load about the drum prior to the introducing of the liquid.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: May 17, 2011
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan, Anthony H. Hardaway, Joel A. Luckman
  • Patent number: 7913339
    Abstract: A fabric treatment appliance comprises a steam generator having a chamber configured to hold water; a supply conduit configured to transport water to the steam generator chamber; a temperature sensor configured to sense a temperature representative of the steam generator chamber at a predetermined water level in the steam generator chamber; and a controller coupled to the temperature sensor and configured to control flow of water through the supply conduit based on the sensed temperature to control the level of water in the steam generator chamber. The disclosure provides methods of water supply control that can employ the temperature sensor.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: March 29, 2011
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan, Dengming Peng
  • Patent number: 7904981
    Abstract: A fabric treatment appliance comprises at least one of a tub and drum defining a fabric treatment chamber, a steam generator having a steam generation chamber and configured to supply steam to the fabric treatment chamber, and a conduit fluidly coupling a water supply to the steam generation chamber. The fabric treatment appliance can also include a flow controller and/or a flow meter fluidly coupled to the conduit to facilitate controlling the supply of water to the steam generation chamber. The disclosure provides methods of water supply control that can employ the flow controller and/or the flow meter.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: March 15, 2011
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan, Dengming Peng
  • Patent number: 7886392
    Abstract: A fabric treatment appliance, such as a washing machine, comprises at least one of a tub and drum configured to hold a fabric load. A method of operating the fabric treatment appliance comprises heating the fabric load and, after heating the fabric load, sanitizing the fabric load by heating the fabric load with steam.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: February 15, 2011
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan, Anthony H. Hardaway, Joel A. Luckman
  • Patent number: 7841219
    Abstract: A fabric treating appliance utilizing steam for treating the fabric and having a steam generator with a conduit for directing the steam.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: November 30, 2010
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan
  • Patent number: 7793525
    Abstract: A clothes mover in a washing machine comprises a body mounted for reciprocal rotational movement about a generally vertical axis and at least one vane, which comprises a base mounted to the body and a tail extending from the base and having an upper edge that transitions into a tip. The tail can be free of the body for side-to-side flexing and can be configured such that a portion of the tail extending between the upper edge and the tip can flex from a generally vertical position toward the body. The body can be made of a first material, and the vane can be made of a second material different from the first material.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: September 14, 2010
    Assignee: Whirlpool Corporation
    Inventors: Viktor N. Kopyrin, Robert J. Pinkowski, James J. Visin, Raveendran Vaidhyanathan, Mary E. Zeitler, Dale E. Mueller
  • Publication number: 20100223961
    Abstract: A method and apparatus for determining the degree of tangling of fabric items during a wash process based on at least one of the motor speed or motor current.
    Type: Application
    Filed: May 19, 2010
    Publication date: September 9, 2010
    Applicant: WHIRLPOOL CORPORATION
    Inventors: FARHAD ASHRAFZADEH, KALYANAKRISHNAN VADAKKEVEEDU, RAVEENDRAN VAIDHYANATHAN
  • Patent number: 7765628
    Abstract: A method for operating a washing machine having a tub with a drum rotatably mounted in the tub and configured to hold a fabric load comprises a pre-wash step; a heating step comprising introducing steam into at least one of the tub and the drum; and a washing step. The pre-wash step comprises recirculating liquid between the tub and the drum; rotating the drum at a first spin speed to distribute the clothing within the drum; and rotating the drum at a second spin speed greater than the first spin speed to draw the liquid through the fabric load.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: August 3, 2010
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan, Anthony H. Hardaway, Joel A. Luckman
  • Patent number: 7757522
    Abstract: An agitator assembly for an automatic washing machine comprises an agitator and an auger mounted to the agitator. The auger comprises a tubular body defining a peripheral surface and having a central longitudinal axis. A vane spirals around the tubular body and extends from the peripheral surface from a root having a thickness T to a tip. The vane has a width W measured from the peripheral surface along a line perpendicular to the central longitudinal axis to the tip. The vane is formed by a plurality of ledges, with adjacent ledges joined by steps. With this configuration, the vane can have a relatively small root thickness T and a relatively large width W.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: July 20, 2010
    Assignee: Whirlpool Corporation
    Inventors: Robert J. Pinkowski, Viktor J. Kopyrin, James J. Visin, Raveendran Vaidhyanathan, Edward S. Hynek
  • Publication number: 20100170046
    Abstract: A fabric treatment appliance comprises at least one of a tub and drum defining a fabric treatment chamber, a steam generator having a steam generation chamber and configured to supply steam to the fabric treatment chamber, and a conduit fluidly coupling a water supply to the steam generation chamber. The fabric treatment appliance can also include a flow controller and/or a flow meter fluidly coupled to the conduit to facilitate controlling the supply of water to the steam generation chamber. The disclosure provides methods of water supply control that can employ the flow controller and/or the flow meter.
    Type: Application
    Filed: March 18, 2010
    Publication date: July 8, 2010
    Applicant: WHIRLPOOL CORPORATION
    Inventors: NYIK SIONG WONG, RAVEENDRAN VAIDHYANATHAN, DENGMING PENG
  • Patent number: 7739765
    Abstract: A method and apparatus for determining the degree of tangling of fabric items during a wash process based on at least one of the motor speed or motor current.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: June 22, 2010
    Assignee: Whirlpool Corporation
    Inventors: Farhad Ashrafzadeh, Kalyanakrishnan Vadakkeveedu, Raveendran Vaidhyanathan
  • Patent number: 7730568
    Abstract: A method of operating a fabric treatment appliance comprises a steam generation step and a steam generator cleaning step. In the steam generator cleaning step, a chamber of the steam generator can be flushed by introducing a volume of liquid into the chamber greater than the internal volume. The steam generator cleaning step can also involve thermally shocking scale formed within the chamber.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: June 8, 2010
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan, Anthony H. Hardaway, Joel A. Luckman
  • Publication number: 20100132128
    Abstract: A fabric treatment appliance comprises a steam generator having a chamber configured to hold water; a supply conduit configured to transport water to the steam generator chamber; a temperature sensor configured to sense a temperature representative of the steam generator chamber at a predetermined water level in the steam generator chamber; and a controller coupled to the temperature sensor and configured to control flow of water through the supply conduit based on the sensed temperature to control the level of water in the steam generator chamber. The disclosure provides methods of water supply control that can employ the temperature sensor.
    Type: Application
    Filed: February 2, 2010
    Publication date: June 3, 2010
    Applicant: WHIRLPOOL CORPORATION
    Inventors: NYIK SIONG WONG, RAVEENDRAN VAIDHYANATHAN, DENGMING PENG
  • Patent number: 7707859
    Abstract: A fabric treatment appliance comprises at least one of a tub and drum defining a fabric treatment chamber, a steam generator having a steam generation chamber and configured to supply steam to the fabric treatment chamber, and a conduit fluidly coupling a water supply to the steam generation chamber. The fabric treatment appliance can also include a flow controller and/or a flow meter fluidly coupled to the conduit to facilitate controlling the supply of water to the steam generation chamber. The disclosure provides methods of water supply control that can employ the flow controller and/or the flow meter.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: May 4, 2010
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan, Dengming Peng
  • Patent number: 7703162
    Abstract: An automatic clothes washer comprises a wash tub in which is disposed a wash basket defining a wash chamber for receiving fabric articles, and an article mover located within the wash chamber and driven by a motor to impart mechanical energy to the fabric articles upon contact. A method for controlling the operation of the automatic clothes washer comprises determining the work imparted to the fabric articles by the article mover, and controlling an operating cycle of the automatic washer based on the determined work.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: April 27, 2010
    Assignee: Whirlpool Corporation
    Inventors: Kalyanakrishnan Vadakkeveedu, Farhad Ashrafzadeh, Raveendran Vaidhyanathan
  • Patent number: 7681418
    Abstract: A fabric treatment appliance comprises a steam generator having a chamber configured to hold water; a supply conduit configured to transport water to the steam generator chamber; a temperature sensor configured to sense a temperature representative of the steam generator chamber at a predetermined water level in the steam generator chamber; and a controller coupled to the temperature sensor and configured to control flow of water through the supply conduit based on the sensed temperature to control the level of water in the steam generator chamber. The disclosure provides methods of water supply control that can employ the temperature sensor.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: March 23, 2010
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan, Dengming Peng
  • Patent number: 7665332
    Abstract: A fabric treating appliance using steam to treat the fabrics and having an exhaust system for removing the steam from the appliance.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: February 23, 2010
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan
  • Patent number: 7628044
    Abstract: An automatic washer for washing garments comprises a wash basket with an open top defining a wash chamber, and a clothes mover mounted in the washer for reciprocal movement about an axis of rotation within the wash chamber. The clothes mover comprises an apron, and at least one vane extending from the apron and defining a working surface having an upper edge and a lower edge, the upper edge and the lower edge extending from an outer end to an inner end. At least one line lying along the working surface and extending between the outer end and the inner end defines a constant angle of attack relative to the direction of movement of the clothes mover. The working surface is configured to move the garments along the working surface at a substantially instantaneously uniform speed. The configurations of the upper surface and the working surface are optimized to move the garments between the perimeter and the axis of rotation while minimizing force acting on the working surface.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: December 8, 2009
    Assignee: Whirlpool Corporation
    Inventors: Viktor N. Kopyrin, Raveendran Vaidhyanathan, Flavio Bernardino, Robert J. Pinkowski
  • Patent number: 7627920
    Abstract: A method for operating a washing machine having a tub with a drum rotatably mounted in the tub and configured to hold a fabric load and a liquid recirculation system configured to recirculate liquid from the tub to the drum comprises a pre-wash step; a heating step comprising introducing steam into the tub and/or the drum; and a washing step comprising washing the fabric load with a second volume of liquid greater than the first volume of liquid. The pre-wash step can comprise recirculating a first volume of liquid between the tub and the drum without submerging a portion of the drum in the liquid and rotating the drum. In another embodiment, the pre-wash step can comprise recirculating a first volume of liquid between the tub and the drum to achieve a fabric load weight to liquid weight ratio of between about 1:0.5 and 1:2.7.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: December 8, 2009
    Assignee: Whirlpool Corporation
    Inventors: Nyik Siong Wong, Raveendran Vaidhyanathan, Anthony H. Hardaway, Joel A. Luckman
  • Publication number: 20090293558
    Abstract: A fabric treatment appliance comprises a steam generator having a chamber configured to hold water, a supply conduit configured to transport water to the steam generator chamber, a weight sensor outputting a signal responsive to the weight of the steam generator, and a controller coupled to the weight sensor and configured to control a flow of water through the supply conduit based on the signal from the weight sensor. The disclosure provides methods of water supply control that can employ the weight sensor.
    Type: Application
    Filed: August 12, 2009
    Publication date: December 3, 2009
    Applicant: WHIRLPOOL CORPORATION
    Inventors: NYIK SIONG WONG, RAVEENDRAN VAIDHYANATHAN, DENGMING PENG