Patents by Inventor Ralph Peter Merkel

Ralph Peter Merkel 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: 8770630
    Abstract: A method for providing a hose pipe connection is disclosed. Embodiments of the method start with a pipe having an enlarged end portion. A sleeve is introduced into the end of the flexible hose. The sleeve has an inner diameter that is equal to the inner diameter of the hose. In an embodiment, the inner diameter of the sleeve is increased while the end of the hose is already placed on the sleeve. The hose fitted with the sleeve is then introduced into the enlarged end of the pipe. Crimping of the enlarged end will then secure the sleeve and the hose and provide a fluid tight and mechanically sturdy connection.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: July 8, 2014
    Assignee: Eaton Fluid Power GmbH
    Inventors: Thomas Zenon Zakrzewski, Andreas Richard Hilgert, Markus Angelo Ullrich, Ralph Peter Merkel
  • Publication number: 20120280491
    Abstract: A method for providing a hose pipe connection is disclosed. Embodiments of the method start with a pipe having an enlarged end portion. A sleeve is introduced into the end of the flexible hose. The sleeve has an inner diameter that is equal to the inner diameter of the hose. In an embodiment, the inner diameter of the sleeve is increased while the end of the hose is already placed on the sleeve. The hose fitted with the sleeve is then introduced into the enlarged end of the pipe. Crimping of the enlarged end will then secure the sleeve and the hose and provide a fluid tight and mechanically sturdy connection.
    Type: Application
    Filed: July 16, 2012
    Publication date: November 8, 2012
    Inventors: Thomas Zenon Zakrzewski, Andreas Richard Hilgert, Markus Angelo Ullrich, Ralph Peter Merkel
  • Patent number: 8230573
    Abstract: A method for providing a hose pipe connection is disclosed. Embodiments of the method start with a pipe having an enlarged end portion. A sleeve is introduced into the end of the flexible hose. The sleeve has an inner diameter that is equal to the inner diameter of the hose. In an embodiment, the inner diameter of the sleeve is increased while the end of the hose is already placed on the sleeve. The hose fitted with the sleeve is then introduced into the enlarged end of the pipe. Crimping of the enlarged end will then secure the sleeve and the hose and provide a fluid tight and mechanically sturdy connection.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: July 31, 2012
    Assignee: Eaton Fluid Power GmbH
    Inventors: Thomas Zenon Zakrzewski, Andreas Richard Hilgert, Markus Angelo Ullrich, Ralph Peter Merkel
  • Publication number: 20090320940
    Abstract: A connecting device for a hydraulic system is provided. In an embodiment, the device includes a valve provided in a passage channel that can be configured to switch flow based on a pressure differential between passage channel pressure and ambient pressure. In an embodiment, the connecting device may include a valve housing provided in the form of a bolt, and the valve housing may be configured for connection to an assembly unit.
    Type: Application
    Filed: July 29, 2006
    Publication date: December 31, 2009
    Applicant: EATON FLUID POWER GMBH
    Inventors: Andreas Hilgert, Thomas Zeon Zakrzewski, Ralph Peter Merkel, Markua Angelo Ullrich
  • Publication number: 20090261580
    Abstract: A method for providing a hose pipe connection is disclosed. Embodiments of the method start with a pipe having an enlarged end portion. A sleeve is introduced into the end of the flexible hose. The sleeve has an inner diameter that is equal to the inner diameter of the hose. In an embodiment, the inner diameter of the sleeve is increased while the end of the hose is already placed on the sleeve. The hose fitted with the sleeve is then introduced into the enlarged end of the pipe. Crimping of the enlarged end will then secure the sleeve and the hose and provide a fluid tight and mechanically sturdy connection.
    Type: Application
    Filed: April 17, 2009
    Publication date: October 22, 2009
    Applicant: Eaton Fluid Power GmbH
    Inventors: Thomas Zenon Zakrzewski, Andreas Richard Hilgert, Markus Angelo Ullrich, Ralph Peter Merkel
  • Publication number: 20090025381
    Abstract: A servo drive includes a hydraulic cylinder. The hydraulic cylinder comprises a piston that is mounted in the cylinder and that delimits two working chambers. Relief lines connected to the working chambers via control orifices may aid the definition of the right and left end positions of the piston. The control orifices are exposed by the piston in its respective end positions, thus relieving the pressure in the active working chamber. An end stop, which may be predetermined by the position of the control orifices may be formed by the pressure relief that occurs at the relevant location in the working chamber. Such measure can relieve the pressure in the hydraulic pump, for instance in end stop positions.
    Type: Application
    Filed: October 19, 2006
    Publication date: January 29, 2009
    Applicant: Eaton Fluid Power GmbH
    Inventors: Andreas Hilgert, Markus Angelo Ullrich, Thomas Zeon Zakrzewski, Ralph Peter Merkel
  • Patent number: 7017610
    Abstract: Disclosed is a damping device to be incorporated into fluid systems, particularly hydraulic systems, said damping device comprising an expansion hose. An essentially rigid damper which is oriented counter to the direction of flow, is disposed inside the internal space of said expansion hose. The damper pipe is provided with a completely closed wall, resulting in a good damping effect. Preferably, the damper pipe is significantly less flexible in the radial direction than the outer expansion pipe, whereby the damping effect is substantially enhanced.
    Type: Grant
    Filed: May 7, 2003
    Date of Patent: March 28, 2006
    Assignee: Eaton Fluid Power GmbH
    Inventors: Michael Zimpfer, Ralph Peter Merkel, Andreas Richard Hilgert