Patents by Inventor Rolf Brockerhoff

Rolf Brockerhoff 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).

  • Publication number: 20140150641
    Abstract: An axial piston machine includes a housing, a drive shaft, and a cylinder drum. The drive shaft is mounted in the housing so as to be rotatable with respect to a first axis of rotation. The cylinder drum is mounted so as to be rotatable with respect to a second axis of rotation. The cylinder drum has at least one cylinder bore that linearly guides an elongate piston. The piston has a first end connected to the drive shaft by a ball joint and a section in the form of a circular cone which tapers toward the first end. The piston also has a spherical section at the second end that is situated opposite the first end. The cone-shaped section merges without offsets and kinks into the spherical section. The piston has a flat end face at the second end which defines a plane that intersects the spherical section.
    Type: Application
    Filed: December 3, 2013
    Publication date: June 5, 2014
    Applicant: Robert Bosch GmbH
    Inventors: Michael Ruckgaber, Rolf Brockerhoff
  • Publication number: 20140150642
    Abstract: An axial piston engine, in particular pump or motor, includes a housing, a drive shaft, and a cylinder drum. The drive shaft is mounted in the housing so as to be rotatable with respect to a first axis of rotation. A bearing body is received in the cylinder drum rotatably with respect to a second axis of rotation. The bearing body is connected to the drive shaft via a first ball joint that has a joint center lying on the first axis of rotation. The cylinder drum has at least one circular-cylindrical cylinder bore in which an elongated piston is displaceably received. A first end of the piston is connected to the drive shaft via a second ball joint. The at least one cylinder bore is arranged at an inclination to the second axis of rotation.
    Type: Application
    Filed: December 3, 2013
    Publication date: June 5, 2014
    Applicant: Robert Bosch GmbH
    Inventors: Michael Ruckgaber, Zoltan Gradwohl, Rolf Brockerhoff
  • Patent number: 7607384
    Abstract: A piston (2) for a piston engine, in particular for an axial-piston engine (1) of the inclined-axis type, comprises a conical section (26), a neck region (19) and a ball end (9) which is formed onto said neck region (19), a clearance (15) which is constructed in the piston and a pin (14) which is constructed in said clearance (15). The wall (20) of the piston (2) has different thicknesses of material in different sections of its axial length.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: October 27, 2009
    Assignee: Brueninghaus Hydromatik GmbH
    Inventor: Rolf Brockerhoff
  • Publication number: 20080083326
    Abstract: A piston (2) for a piston engine, in particular for an axial-piston engine (1) of the inclined-axis type, comprises a conical section (26), a neck region (19) and a ball end (9) which is formed onto said neck region (19), a clearance (15) which is constructed in the piston and a pin (14) which is constructed in said clearance (15). The wall (20) of the piston (2) has different thicknesses of material in different sections of its axial length.
    Type: Application
    Filed: December 14, 2005
    Publication date: April 10, 2008
    Inventor: Rolf Brockerhoff
  • Patent number: 7163078
    Abstract: The invention relates to a hydrostatic drive comprising at least one hydraulic pump (1) and a first and a second hydraulic motor (6, 25), which are respectively connected to said hydraulic pump (1) by means of two service lines (4, 41, 5, 5?) and whose absorption volume can be regulated by means of a regulator (40, 41). One respective hydraulic motor (6, 25) for a drive train is provided per respective right or left vehicle side. The regulators (40, 41) are actuated by a respective regulator piston (7, 26). The regulator pistons (7, 26) of both hydraulic motors (6, 25) can be subjected to a force by means of a common high pressure, which equals the highest pressure that prevails in the service lines (4, 41, 5, 5?) of both hydraulic motors (6, 25). Each force is opposed to a respective counter-force, which is generated by a control pressure in a control pressure chamber (11, 11?).
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: January 16, 2007
    Assignee: Brueninghaus Hydromatik GmbH
    Inventors: Juan Moya, Rolf Brockerhoff
  • Publication number: 20040083728
    Abstract: The invention relates to a hydrostatic drive comprising at least one hydraulic pump (1) and a first and a second hydraulic motor (6, 25), which are respectively connected to said hydraulic pump (1) by means of two service lines (4, 41, 5, 5′) and whose absorption volume can be regulated by means of a regulator (40, 41). One respective hydraulic motor (6, 25) for a drive train is provided per respective right or left vehicle side. The regulators (40, 41) are actuated by a respective regulator piston (7, 26). The regulator pistons (7, 26) of both hydraulic motors (6, 25) can be subjected to a force by means of a common high pressure, which equals the highest pressure that prevails in the service lines (4, 41, 5, 5′) of both hydraulic motors (6, 25). Each force is opposed to a respective counter-force, which is generated by a control pressure in a control pressure chamber (11, 11′).
    Type: Application
    Filed: September 10, 2003
    Publication date: May 6, 2004
    Inventors: Juan Moya, Rolf Brockerhoff