Patents by Inventor Craig S. Ruhl

Craig S. Ruhl 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).

  • Publication number: 20040168261
    Abstract: A washing machine includes a washing machine cabinet. A wash basket is mounted within the washing machine cabinet. A first agitator is mounted in the basket for rotation about a first agitator axis that extends in a direction different from the rotational axis of the wash basket. First agitator includes a first helical rib thereon for engaging and agitating the materials to be washed within the wash basket. A second agitator with a second helical rib may also be contained within the wash basket.
    Type: Application
    Filed: February 27, 2003
    Publication date: September 2, 2004
    Applicant: Maytag Corporation
    Inventors: Scott E. Griffith, Chris P. Lickiss, Craig S. Ruhl
  • Patent number: 6609264
    Abstract: A drain pump of a washing machine is cyclically activated during a drain operation conducted as part of a spin cycle in a manner which reduces the run time of the pump. At least one dynamic operating parameter of the washing machine is sensed and used to control the operation of the drain pump. In accordance with a preferred embodiment of the invention, the rotational speed of the wash tub is sensed and, when a predetermined spin speed is maintained for a prescribed period of time, the drain operation is initiated. Water level, pump power and/or drive motor torque can also be utilized as pump cycling control parameters.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: August 26, 2003
    Assignee: Maytag Corporation
    Inventors: Craig S. Ruhl, Evan R. Vande Haar
  • Publication number: 20030056300
    Abstract: A drain pump of a washing machine is cyclically activated during a drain operation conducted as part of a spin cycle in a manner which reduces the run time of the pump. At least one dynamic operating parameter of the washing machine is sensed and used to control the operation of the drain pump. In accordance with a preferred embodiment of the invention, the rotational speed of the wash tub is sensed and, when a predetermined spin speed is maintained for a prescribed period of time, the drain operation is initiated. Water level, pump power and/or drive motor torque can also be utilized as pump cycling control parameters.
    Type: Application
    Filed: September 21, 2001
    Publication date: March 27, 2003
    Applicant: Maytag Corporation
    Inventors: Craig S. Ruhl, Evan R. Vande Haar
  • Patent number: 5596889
    Abstract: A laundry machine with a reduced suds spin cycle includes a laundry basket to hold laundry which contains a liquid, typically a water/detergent solution. A tub surrounds the laundry basket. A circular drainage void is formed between the laundry basket and the tub. A motor, responsive to a control circuit, rotationally drives the laundry basket. The control circuit modulates the motor such that the laundry basket achieves a first rotational speed sufficient to force substantially all of the laundry against the wall of the laundry basket. Then, a second rotational speed, greater than the first rotational speed, forces the water/detergent solution from the laundry into the circular drainage void. An intermediate rotational speed, substantially equivalent to the first rotational speed, is then used while water/detergent solution is removed from the circular drainage void, inhibiting suds formation.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: January 28, 1997
    Assignee: Electric Power Research Institute
    Inventors: Lawrence E. Guerra, Craig S. Ruhl