Patents by Inventor Holger Muehlhoff

Holger Muehlhoff 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).

  • Pressure-limiting valve
    Patent number: 10890267
    Abstract: A pressure-limiting valve includes a housing and a pressure adjustment device provided therein. The pressure-limiting valve further includes a valve seat arranged in the housing and configured to be closed by a spring-loaded closing element of the pressure adjustment device. The housing is composed of cast iron having spherical graphite. The housing is surface-hardened at least in a region of the valve seat.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: January 12, 2021
    Assignee: Robert Bosch GmbH
    Inventors: Holger Muehlhoff, Robert Schloeder, Dieter Born, Wasilij Schieder
  • Pressure-Limiting Valve
    Publication number: 20190093782
    Abstract: A pressure-limiting valve includes a housing and a pressure adjustment device provided therein. The pressure-limiting valve further includes a valve seat arranged in the housing and configured to be closed by a spring-loaded closing element of the pressure adjustment device. The housing is composed of cast iron having spherical graphite. The housing is surface-hardened at least in a region of the valve seat.
    Type: Application
    Filed: December 16, 2015
    Publication date: March 28, 2019
    Inventors: Holger Muehlhoff, Robert Schloeder, Dieter Born, Wasilij Schieder
  • Valve housing
    Patent number: 8844902
    Abstract: The invention discloses a valve housing (1) having a main bore (6) and at least one connecting bore or secondary bore (12, 20, 22, 36), the diameter of which is smaller than the diameter of the main bore. The connecting or secondary bores end at a side wall limiting the main bore, wherein the side wall has different material thicknesses being distributed at the circumference thereof. According to the invention, to reduce material stresses the valve housing has tension reducing grooves (14, 26, 28, 34) in the ending regions, said grooves being integrally molded into the side wall of the main bore.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: September 30, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Holger Muehlhoff, Christoph Eisele
  • Valve Housing
    Publication number: 20110186768
    Abstract: The invention discloses a valve housing (1) having a main bore (6) and at least one connecting bore or secondary bore (12, 20, 22, 36), the diameter of which is smaller than the diameter of the main bore. The connecting or secondary bores end at a side wall limiting the main bore, wherein the side wall has different material thicknesses being distributed at the circumference thereof. According to the invention, to reduce material stresses the valve housing has tension reducing grooves (14, 26, 28, 34) in the ending regions, said grooves being integrally molded into the side wall of the main bore.
    Type: Application
    Filed: July 20, 2009
    Publication date: August 4, 2011
    Inventors: Holger Muehlhoff, Christoph Eisele
  • Communication module housing
    Patent number: D1010695
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: January 9, 2024
    Assignee: Robert Bosch GmbH
    Inventor: Holger Muehlhoff