Patents by Inventor Steven H. Marquardt

Steven H. Marquardt 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: 11015624
    Abstract: A valve for controlling a flow of a fluid between a source, reservoir, a vent, and pressure-based device. The valve has multiple positions each having a source port fluidly coupleable to the source, reservoir port fluidly coupleable to the reservoir, device port fluidly coupleable to the pressure-based device, and venting port configured to vent the fluid. The multiple positions are separately selectable and include a fill position having a fill conduit fluidly coupling the source port and device port, a recycle position having a recycle conduit fluidly coupling the reservoir port and device port, and a vent position having a vent conduit fluidly coupling the vent port and device port. The fill conduit, recycle conduit, and vent conduit each communicate the fluid only when a corresponding one of the multiple positions is selected, and the multiple positions are configured to prevent selection of more than one at a time.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: May 25, 2021
    Inventor: Steven H. Marquardt
  • Patent number: 10914322
    Abstract: An improved method and circuitry for fluid power applications that provides energy savings through the sequential recycling of normally exhausted pressure or vacuum by direct transfer and accumulation of exhaust pressure for additional use, including from one end of the actuator to the opposite end or within the actuator itself and for use by other devices in separate systems.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: February 9, 2021
    Inventor: Steven H. Marquardt
  • Patent number: 10865735
    Abstract: An improved method and means for increasing the efficiency and power output of combustion engines, fluid power devices and other force transmitting applications. Pressure wave inversion details are provided to increase fluid flow and applied force while reducing friction and wear. The speed of combustion is also significantly increased which improves fuel economy, emissions and engine performance.
    Type: Grant
    Filed: March 3, 2018
    Date of Patent: December 15, 2020
    Inventor: Steven H. Marquardt
  • Publication number: 20200149563
    Abstract: A valve for controlling a flow of a fluid between a source, reservoir, a vent, and pressure-based device. The valve has multiple positions each having a source port fluidly coupleable to the source, reservoir port fluidly coupleable to the reservoir, device port fluidly coupleable to the pressure-based device, and venting port configured to vent the fluid. The multiple positions are separately selectable and include a fill position having a fill conduit fluidly coupling the source port and device port, a recycle position having a recycle conduit fluidly coupling the reservoir port and device port, and a vent position having a vent conduit fluidly coupling the vent port and device port. The fill conduit, recycle conduit, and vent conduit each communicate the fluid only when a corresponding one of the multiple positions is selected, and the multiple positions are configured to prevent selection of more than one at a time.
    Type: Application
    Filed: January 14, 2020
    Publication date: May 14, 2020
    Inventor: Steven H. Marquardt
  • Patent number: 10550863
    Abstract: An improved method and circuitry for fluid power applications that provides energy savings through the recycling of normally exhausted pressure by direct transfer and accumulation of exhaust pressure for additional use, including from one end of the actuator to the opposite end or within the actuator itself and for use by other devices in separate systems.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: February 4, 2020
    Inventor: Steven H. Marquardt
  • Patent number: 6923094
    Abstract: A tool has a pair of elongate housings adapted to be joined together in a housing assembly for enclosing and supporting a flexible drive mechanism entrained about a pair of rotatable elements. Each of the rotatable elements is disposed on the housing assembly at opposite ends thereof. A flexible drive mechanism provides a transfer of power between the rotatable elements so that rotation of one rotatable element at one input end of the housing assembly will effect driven rotation of the other rotatable element at an output end of the housing assembly. The elongate housings include male and female configurations for aligning and joining the housings without independent fasteners.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: August 2, 2005
    Inventor: Steven H. Marquardt
  • Patent number: 6832531
    Abstract: A tool has a pair of elongate housings adapted to be joined together in a housing assembly for enclosing and supporting a drive mechanism between a pair of oppositely disposed rotatable elements. The drive mechanism provides a transfer of power between the rotatable elements so that rotation of one rotatable element at one input end of the housing assembly will effect driven rotation of the other rotatable element at an output end of the housing assembly. The input end of the housing is provided with a first interlock configuration overlying and encircling the input end rotatable element. A motor mechanism is coupled to the input end of the housing assembly and has a rotatable drive shaft which passes entirely through and drives the input end rotatable element. The motor mechanism is integrally formed with a second interlock configuration identical to and matingly engageable with the first interlock configuration.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: December 21, 2004
    Inventor: Steven H. Marquardt
  • Patent number: 6647830
    Abstract: A tool has a pair of elongate housings adapted to be joined together in a housing assembly for enclosing and supporting a flexible drive mechanism entrained about a pair of rotatable elements. Each of the rotatable elements is disposed on the housing assembly at opposite ends thereof. A flexible drive mechanism provides a transfer of power between the rotatable elements so that rotation of one rotatable element at one input end of the housing assembly will effect driven rotation of the other rotatable element at an output end of the housing assembly. The elongate housings include male and female configurations for aligning and joining the housings without independent fasteners.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: November 18, 2003
    Inventor: Steven H. Marquardt
  • Publication number: 20030061913
    Abstract: A tool has a pair of elongate housings adapted to be joined together in a housing assembly for enclosing and supporting a flexible drive mechanism entrained about a pair of rotatable elements. Each of the rotatable elements is disposed on the housing assembly at opposite ends thereof. A flexible drive mechanism provides a transfer of power between the rotatable elements so that rotation of one rotatable element at one input end of the housing assembly will effect driven rotation of the other rotatable element at an output end of the housing assembly. The elongate housings include male and female configurations for aligning and joining the housings without independent fasteners.
    Type: Application
    Filed: December 27, 2001
    Publication date: April 3, 2003
    Inventor: Steven H. Marquardt