Patents by Inventor Andrew Tischendorf

Andrew Tischendorf 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: 9181115
    Abstract: Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: November 10, 2015
    Assignee: PENTAIR RESIDENTIAL FILTRATION, LLC
    Inventors: Andrew Tischendorf, Michael P. Lindfors, Kyle Paull
  • Publication number: 20140144845
    Abstract: Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system.
    Type: Application
    Filed: January 6, 2014
    Publication date: May 29, 2014
    Applicant: Pentair Residential Filtration, LLC
    Inventors: Andrew Tischendorf, Michael M. Lindfors, Kyle Paull
  • Patent number: 8623217
    Abstract: Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: January 7, 2014
    Assignee: Pentair Residential Filtration, LLC
    Inventors: Andrew Tischendorf, Michael M. Lindfors, Kyle Paull
  • Publication number: 20130306578
    Abstract: Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system.
    Type: Application
    Filed: July 26, 2013
    Publication date: November 21, 2013
    Applicant: Pentair Residential Filtration, LLC
    Inventors: Andrew Tischendorf, Michael M. Lindfors, Kyle Paull
  • Patent number: 8500999
    Abstract: Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: August 6, 2013
    Assignee: Pentair Residential Filtration, LLC
    Inventors: Andrew Tischendorf, Michael M. Lindfors, Kyle Paull
  • Publication number: 20100200522
    Abstract: Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system.
    Type: Application
    Filed: February 1, 2010
    Publication date: August 12, 2010
    Inventors: Andrew Tischendorf, Michael M. Lindfors, Kyle Paull
  • Patent number: 6401501
    Abstract: The lock construction of the present invention has a lock body defining an interior cavity and a shackle that is releasably received in the interior cavity. The shackle is movable to a locked position for securing to an object and an unlocked position for releasing the object between the shackle and the lock body. A locking mechanism is disposed within the interior cavity of the lock and comprises rotatable first and second members. A motor is included to rotate said second member and thereby rotate the first member to secure and release the shackle between the locked and unlocked positions.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: June 11, 2002
    Assignee: Master Lock Company
    Inventors: Peter Kajuch, Andrew Tischendorf
  • Patent number: 6297725
    Abstract: A keyless locking mechanism is activated by a remote unit which transmits coded signals to an electromechanical door lock device. The electromechanical device components are configured for secure mounting within the void or hollow portions of existing door locking apparatus. A sensor in the outer doorknob receives and forwards the coded signals to a processor which compares them with a predetermined stored signal. If an acceptable comparison is made, the processor generates control signals for the device, which acts solely along the locking axis to enable or disable the door locking assembly. The coded signals include two separate signals which are transmitted in segments interleaved with one another. The first signal includes an entrance code, while the second signal provides information concerning the frequency over which the next segments will be transmitted. The processor uses the second signal information to tune the receiver.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: October 2, 2001
    Assignee: Schlage Lock Company
    Inventors: Andrew Tischendorf, Kenneth Schultz, Gary Lehman, Demos Andreou, Ari Glezer
  • Patent number: 5933086
    Abstract: A keyless locking mechanism for use in a door or the like. An operator activates the system by means of a portable remote handheld controller or a remote keypad unit, which transmit coded signals to an electronically controlled, electromechanical door lock device. The electronic and electromechanical device components are configured for secure mounting within the void or hollow portions of existing door locking apparatus, such as within the hollow interior doorknob, or hollow cylindrical sleeve latch actuators, or beneath the interior rose or escutcheon plates. A sensor or receiver/antenna mounted within the outer doorknob receives and forwards the coded signals to a processor which compares them with a predetermined stored signal. If an acceptable comparison is made, the processor generates control signals for the electromechanical device, which acts solely along or about the locking axis to enable or disable the door locking assembly, according to the command initiated by the operator.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: August 3, 1999
    Assignee: Schlage Lock Company
    Inventors: Andrew Tischendorf, Kenneth Schultz, Gary Lehman, Demos Andreou, Ari Glezer
  • Patent number: D437204
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: February 6, 2001
    Assignee: Master Lock Company
    Inventors: Peter Kajuch, Andrew Tischendorf