Patents by Inventor Douglas W. Seitz

Douglas W. Seitz 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: 8984974
    Abstract: A firefighting pump transmission for use with an emergency vehicle pump comprising a housing receiving a drive shaft, the drive shaft having a PTO gear affixed thereto within the housing, an impeller shaft for turning an impeller of a pump, and means for selectively powering the impeller shaft from the drive shaft, the means for powering may include a multi-disk clutch. The transmission allows for powering the PTO gear while the impeller shaft is idle. A Commercially Available PTO device may be mounted to the housing to power a variety of devices.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: March 24, 2015
    Assignee: W.S. Darley & Co.
    Inventors: Douglas W. Seitz, Michael C. Ruthy
  • Patent number: 8678750
    Abstract: A specialty pump and heat exchange system having a fluid pump driven by a gear assembly. The fluid pump has a pump casing and an inboard head that form a fluid passageway when connected together. The gear assembly uses lubricant in the transmission and that lubricant is cooled by being pumped from the gear assembly through a lubricant passageway in the inboard head and then recycled back to the gear assembly for further use. In addition to cooling the lubricant, the system warms the fluid pump and/or fluid passing through the fluid pump.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: March 25, 2014
    Assignee: W. S. Darley + Co.
    Inventor: Douglas W. Seitz
  • Publication number: 20110255960
    Abstract: A specialty pump and heat exchange system having a fluid pump driven by a gear assembly. The fluid pump has a pump casing and an inboard head that form a fluid passageway when connected together. The gear assembly uses lubricant in the transmission and that lubricant is cooled by being pumped from the gear assembly through a lubricant passageway in the inboard head and then recycled back to the gear assembly for further use. In addition to cooling the lubricant, the system warms the fluid pump and/or fluid passing through the fluid pump.
    Type: Application
    Filed: April 18, 2011
    Publication date: October 20, 2011
    Inventor: Douglas W. Seitz
  • Patent number: 7517186
    Abstract: The present invention is directed to a pump casing and a centrifugal pump comprising a single piece casing, the casing comprising a first cut-water fluid flow path, a second cut-water fluid flow path, a first joint-water path, a second joint-water path, and an impeller cavity, the first cut-water fluid flow path and the second cut-water fluid flow path communicating with the first joint-water path and the second joint-water path, the pump further comprising an impeller positioned within the cavity, and a suction head overlaying the impeller. The first joint-water path communicates with a first discharge nozzle and the second joint-water path communicates with a second discharge nozzle, the first discharge nozzle and the second discharge nozzle situated substantially at opposing ends of the casing.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: April 14, 2009
    Assignee: W.S. Darley & Co.
    Inventors: Douglas W. Seitz, Michael C. Ruthy, Wayne Hable
  • Publication number: 20080141800
    Abstract: A firefighting pump transmission for use with an emergency vehicle pump comprising a housing receiving a drive shaft, the drive shaft having a PTO gear affixed thereto within the housing, an impeller shaft for turning an impeller of a pump, and means for selectively powering the impeller shaft from the drive shaft, the means for powering may include a multi-disk clutch. The transmission allows for powering the PTO gear while the impeller shaft is idle. A Commercially Available PTO device may be mounted to the housing to power a variety of devices.
    Type: Application
    Filed: December 14, 2007
    Publication date: June 19, 2008
    Inventors: Douglas W. Seitz, Michael C. Ruthy
  • Publication number: 20080141799
    Abstract: A firefighting pump transmission for use with an emergency vehicle pump comprising a PTO gear affixed to a drive shaft of the transmission and an impeller clutch driving gear affixed to the drive shaft adjacent the PTO gear. The clutch driving gear may couple with a multi-disk clutch to turn an impeller shaft. The transmission allows for changing the gearing of the PTO without affecting the ratio or speeds of the impeller driving mechanism, and vice versa. The dual gears on the drive shaft accommodate compatibility with a Commercially Available PTO device to be mounted to the housing of the transmission to power a variety of devices.
    Type: Application
    Filed: December 14, 2007
    Publication date: June 19, 2008
    Inventors: Douglas W. Seitz, Michael C. Ruthy
  • Publication number: 20070292267
    Abstract: The present invention is directed to a pump casing and a centrifugal pump comprising a single piece casing, the casing comprising a first cut-water fluid flow path, a second cut-water fluid flow path, a first joint-water path, a second joint-water path, and an impeller cavity, the first cut-water fluid flow path and the second cut-water fluid flow path communicating with the first joint-water path and the second joint-water path, the pump further comprising an impeller positioned within the cavity, and a suction head overlaying the impeller. The first joint-water path communicates with a first discharge nozzle and the second joint-water path communicates with a second discharge nozzle, the first discharge nozzle and the second discharge nozzle situated substantially at opposing ends of the casing.
    Type: Application
    Filed: June 16, 2006
    Publication date: December 20, 2007
    Inventors: Douglas W. Seitz, Michael C. Ruthy, Wayne Hable
  • Patent number: 6997238
    Abstract: A gearbox assembly comprising a casing defining a cavity for housing gears of an engine-driven apparatus, the casing having at least one substantially flat exterior surface for receiving a cooler plate, and a cooler plate mounted to the casing at the substantially flat exterior surface, the cooler plate isolated from the cavity by the flat exterior surface, the cooler plate having a channel for receiving a liquid for cooling the casing and at least one port in communication with the channel. At least one further embodiment includes a gearbox assembly where the channel is aligned with the exterior surface for supplying liquid in contact with the surface. The invention also includes a cooler plate for attachment at a closed exterior surface of a gearbox in order to supply cooling liquid in contact with the gearbox surface to cool the gearbox.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: February 14, 2006
    Assignee: W.S. Darley & Co.
    Inventors: Michael C. Ruthy, Douglas W. Seitz