Patents by Inventor Edwin Sefcik

Edwin Sefcik 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).

  • Hydraulic flowpath through a cylinder wall
    Patent number: 10697480
    Abstract: Various embodiments of a hydraulic cylinder assembly, cylinder liner member and a hydraulic manifold for use with the hydraulic cylinder assembly reduce the need for external plumbing from the rear of the hydraulic cylinder assembly to the front of the hydraulic cylinder assembly. The cylinder liner member may include three bores that convey fluid from the manifold from the rear of the hydraulic cylinder assembly to the front of the assembly, conveying fluid to the retract volume of the cylinder.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: June 30, 2020
    Assignee: Caterpillar Inc.
    Inventors: Edwin Sefcik, Johannes Lambertus Leonardes van Gemert
  • HYDRAULIC FLOWPATH THROUGH A CYLINDER WALL
    Publication number: 20190195247
    Abstract: Various embodiments of a hydraulic cylinder assembly, cylinder liner member and a hydraulic manifold for use with the hydraulic cylinder assembly reduce the need for external plumbing from the rear of the hydraulic cylinder assembly to the front of the hydraulic cylinder assembly. The cylinder liner member may include three bores that convey fluid from the manifold from the rear of the hydraulic cylinder assembly to the front of the assembly, conveying fluid to the retract volume of the cylinder.
    Type: Application
    Filed: February 28, 2019
    Publication date: June 27, 2019
    Applicant: Caterpillar Inc.
    Inventors: Edwin Sefcik, Johannes Lambertus Leonardes van Gemert
  • Hydraulic flowpath through a cylinder wall
    Patent number: 10260534
    Abstract: Various embodiments of a hydraulic cylinder assembly, cylinder liner member and a hydraulic manifold for use with the hydraulic cylinder assembly reduce the need for external plumbing from the rear of the hydraulic cylinder assembly to the front of the hydraulic cylinder assembly. The cylinder liner member may include three bores that convey fluid from the manifold from the rear of the hydraulic cylinder assembly to the front of the assembly, conveying fluid to the retract volume of the cylinder.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: April 16, 2019
    Assignee: Caterpillar Inc.
    Inventors: Edwin Sefcik, Johannes Lambertus Leonardes van Gemert
  • HYDRAULIC FLOWPATH THROUGH A CYLINDER WALL
    Publication number: 20180128291
    Abstract: Various embodiments of a hydraulic cylinder assembly, cylinder liner member and a hydraulic manifold for use with the hydraulic cylinder assembly reduce the need for external plumbing from the rear of the hydraulic cylinder assembly to the front of the hydraulic cylinder assembly. The cylinder liner member may include three bores that convey fluid from the manifold from the rear of the hydraulic cylinder assembly to the front of the assembly, conveying fluid to the retract volume of the cylinder.
    Type: Application
    Filed: November 9, 2016
    Publication date: May 10, 2018
    Applicant: Caterpillar Inc.
    Inventors: Edwin Sefcik, Johannes Lambertus Leonardes van Gemert
  • Hydraulic system with bi-directional regeneration
    Patent number: 9003951
    Abstract: A hydraulic actuator system including an actuator and a valve assembly configured for bi-directional regeneration. The actuator may include a hollow body and a rod disposed within and extending outwardly from the hollow body. The rod may include a first chamber within the rod and a piston disposed at one end of the rod, defining a second chamber and a third chamber within the hollow body. A valve assembly may be in fluid communication with a first conduit, a second conduit, the first chamber, the second chamber, and the third chamber, wherein the valve assembly is configured to selectively couple one of the first conduit and the second conduit to one or more of the first port, the second port, and the third port, wherein one of the first conduit and the second conduit is configured as a pressure source.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: April 14, 2015
    Assignee: Caterpillar Inc.
    Inventor: Edwin Sefcik
  • HYDRAULIC SYSTEM WITH BI-DIRECTIONAL REGENERATION
    Publication number: 20130086899
    Abstract: A hydraulic actuator system including an actuator and a valve assembly configured for bi-directional regeneration. The actuator may include a hollow body and a rod disposed within and extending outwardly from the hollow body. The rod may include a first chamber within the rod and a piston disposed at one end of the rod, defining a second chamber and a third chamber within the hollow body. A valve assembly may be in fluid communication with a first conduit, a second conduit, the first chamber, the second chamber, and the third chamber, wherein the valve assembly is configured to selectively couple one of the first conduit and the second conduit to one or more of the first port, the second port, and the third port, wherein one of the first conduit and the second conduit is configured as a pressure source.
    Type: Application
    Filed: October 5, 2011
    Publication date: April 11, 2013
    Applicant: Caterpillar Inc.
    Inventor: Edwin Sefcik