Patents by Inventor Karl F. Ludwig

Karl F. Ludwig 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: 7569182
    Abstract: The present invention provides a method of operating a reprocessor that has a chamber for receiving items to be sterilized. The reprocessor is filled with water that has passed through a first and a second filter element that both comprise a filtration system. A liquid sterilant is generated by mixing the water with dry chemical reagents. The liquid sterilant is circulated through a fluid circulation system and the filtration system wherein a portion of the liquid sterilant is directed through a bypass conduit and another portion is directed through the first and second filter elements. After a predetermined exposure time, the reprocessor is drained. Then the reprocessor is filled with water for rinsing that has passed through the first and the second filter elements. The water for rinsing is heated prior to being introduced into the reprocessor.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: August 4, 2009
    Assignee: American Sterilizer Company
    Inventors: Peter A. Burke, Karl F. Ludwig, Jude A. Kral, Francis J. Zelina
  • Patent number: 7476368
    Abstract: A system for microbially deactivating items. The system includes a circulation system for circulating a microbial decontamination fluid through a deactivation chamber that forms a part of the circulation system. A container for holding items to be deactivated is provided. The container has a sealable cavity in which the items to be deactivated may be placed, and at least one valve element that is movable between an open and a closed position to regulate fluid flow into the cavity. An actuator in the deactivation chamber is operable to move the valve element to an open position when the container is disposed within the deactivation chamber, wherein the cavity within the container is in fluid communication with the circulation system when the valve element is in the open position.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: January 13, 2009
    Assignee: American Sterilizer Company
    Inventors: Donald A. Sargent, Christopher A. Jethrow, Jude A. Kral, Karl F. Ludwig, Victor Selig
  • Patent number: 7437958
    Abstract: The present invention provides a device for obtaining a sample of fluid from a process conduit. The device includes a tubular core that has a passageway extending therethrough. The tubular core has ends that are attachable to spaced-apart portions of a conduit. A tubular sleeve surrounds the tubular core such that the tubular core extends lengthwise through the tubular sleeve. The tubular sleeve has a boss formed thereon that has a bore extending therethrough. The bore fluidly communicates with the tubular core. A syringe is mountable to the boss and the syringe has a needle. The needle is dimensioned to extend through the bore to puncture the core and to project into the passageway inside the core.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: October 21, 2008
    Assignee: American Sterilizer Company
    Inventors: Pramod K. Sharma, Susan G. Quick, Karl F. Ludwig, II
  • Patent number: 7422729
    Abstract: A reprocessor for microbially deactivating items. The reprocessor has a circulation system for circulating a microbial deactivation fluid through a deactivation chamber that forms part of the circulation system. A container is provided for insertion into the deactivation chamber for holding items to be microbially deactivated. The container includes a tray and a lid. The tray and lid have interlocking, integrally formed, rigid seal elements formed thereon to form a seal between the tray and the lid.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: September 9, 2008
    Assignee: American Sterilizer Company
    Inventors: Victor Selig, Karl F. Ludwig, Jude A. Kral, Christopher A. Jethrow, Jeffrey Horacek, Donald A. Sargent
  • Patent number: 7314966
    Abstract: A method of microbially deactivating items and storing the same, comprising the steps of: a) placing items within a cavity in a sealable container having fluid access ports therein, the fluid access ports having a normally closed position and being moveable to an open position; b) placing the container having items to be microbially deactivated in the cavity into a reprocessor having a circulation system for circulating a microbial deactivation fluid during a deactivation cycle, wherein the fluid access ports in the container are moved to the open position to be in fluid communication with the circulation systems by contact with the reprocessor; c) circulating the microbial deactivation fluid through the cavity of the container; and d) removing the container from the reprocessor following a deactivation cycle, wherein removal of the container from the reprocessor causes the fluid access ports to assume the normally closed position.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: January 1, 2008
    Assignee: Steris Inc.
    Inventors: Victor Selig, Karl F. Ludwig, Jude A. Kral, Christopher A. Jethrow, Jeffrey Horacek, Donald A. Sargent
  • Patent number: 7169369
    Abstract: A reprocessor for microbially deactivating items. The reprocessor has a circulation system for circulating a microbial deactivation fluid through a deactivation chamber that forms part of the circulation system. A container is provided for insertion into the deactivation chamber for holding items to be microbially deactivated. The container includes a tray and a lid. The tray and lid have interlocking, integrally formed, rigid seal elements formed thereon to form a seal between the tray and the lid.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: January 30, 2007
    Assignee: Steris Inc.
    Inventors: Victor Selig, Karl F. Ludwig, Jude A. Kral, Christopher A. Jethrow, Jeffrey Horacek, Donald A. Sargent
  • Patent number: 7135142
    Abstract: A reprocessor having a circulation system for circulating a microbial deactivation fluid through a chamber that forms a part of the circulation system. The reprocessor includes a water filtration system for filtering water used in the reprocessor. The water filtration system includes a fluid feed line connectable to a source of pressurized water. A first filter and second filter elements are disposed in the fluid feed line for filtering fluids flowing therethrough. The second filter element is downstream from the first filter element and has the capacity to filter particles smaller than the first filter element. The fluid feed line forms a fluid path for water entering the reprocessor, and defines a portion of a path for microbial deactivation fluid circulated through the circulation system.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: November 14, 2006
    Assignee: Steris Inc.
    Inventors: Peter A. Burke, Karl F. Ludwig, Jude A. Kral, Francis J. Zelina
  • Patent number: 6942224
    Abstract: An inflatable seal member for providing a fluid-tight seal. The inflatable seal member is particularly well suited to sealing a processing chamber having pressurized fluids therein. Outward forces (exerted by air pressure) to the inner surfaces of the seal member counteract inward forces (exerted by fluid pressure) to the outer surfaces of the seal member.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: September 13, 2005
    Assignee: Steris Inc.
    Inventors: Karl F. Ludwig, John C. Houston