Patents by Inventor Joesph W. Langenfeld

Joesph W. Langenfeld 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: 8413572
    Abstract: A hydraulic system is disclosed that utilizes a switching block to selectively allow pressurized fluid to be stolen from a master or lift cylinder and directed to a single acting cylinder to perform a function, such as securing an implement to a vehicle. The system utilizes the highly pressurized hydraulic fluid from an extended lift cylinder to maintain a secondary cylinder in an extended position. To withdraw the secondary cylinder, a one-way valve directs fluid to the opposite chamber of the secondary cylinder. The secondary cylinder, however will only retract if the master cylinder is retracted and not under pressure, thus providing a significant safety benefit in certain applications. This system provides many cost efficiencies and may be utilized by work vehicles to perform secondary functions such as attaching and removing an implement from a vehicle such as, for example, a loader from a tractor.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: April 9, 2013
    Assignee: Westendorf Manufacturing, Co.
    Inventors: Joesph W. Langenfeld, Neal W. Westendorf
  • Patent number: 7559270
    Abstract: A hydraulic system that allows pressurized fluid to be stolen from a master or lift cylinder and directed to a single acting cylinder to perform a function. The system utilizes a spring in the single acting cylinder to force the fluid to retract through the same single line that powered the single acting cylinder. The fluid is then routed to the unloaded side of the master cylinder. This system provides many cost efficiencies and may be utilized by work vehicles to perform secondary functions such as attaching and removing an implement and locking and unlocking a loader.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: July 14, 2009
    Assignee: Westendorf Manufacturing Co., Inc.
    Inventors: Joesph W. Langenfeld, Neal W Westendorf
  • Publication number: 20080115490
    Abstract: A hydraulic system that allows pressurized fluid to be stolen from a master or lift cylinder and directed to a single acting cylinder to perform a function. The system utilizes a spring in the single acting cylinder to force the fluid to retract through the same single line that powered the single acting cylinder. The fluid is then routed to the unloaded side of the master cylinder. This system provides many cost efficiencies and may be utilized by work vehicles to perform secondary functions such as attaching and removing an implement and locking and unlocking a loader.
    Type: Application
    Filed: November 22, 2006
    Publication date: May 22, 2008
    Inventors: Joesph W. Langenfeld, Neal W. Westendorf