Patents by Inventor Martin Scheffel

Martin Scheffel 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: 20070228662
    Abstract: A compensating element for supporting a fuel injector in a cylinder head of an internal combustion engine has an annular design and is situated between a valve housing of the fuel injector and a wall of a receiving bore of the cylinder head. The compensating element includes at least two side pieces, which are supported on the fuel injector and the cylinder head.
    Type: Application
    Filed: July 7, 2004
    Publication date: October 4, 2007
    Inventors: Ferdinand Reiter, Martin Scheffel
  • Publication number: 20070114299
    Abstract: The fuel injector for fuel-injection systems of combustion engines has an excitable actuator for actuating a valve-closure member, which forms a sealing seat together with a valve-seat surface. At least one spray-discharge orifice is formed downstream from the valve-seat surface from which fuel is output in the direction of a combustion chamber. In addition, the fuel injector has a nozzle body, which surrounds the valve-seat surface or accommodates a valve-seat body having the valve-seat surface. The nozzle body is introduced into a downstream thin-walled extension of a connection piece, which also serves as an inner pole of a magnetic circuit, and is fixedly connected to this extension.
    Type: Application
    Filed: November 2, 2006
    Publication date: May 24, 2007
    Inventor: Martin Scheffel
  • Patent number: 7210462
    Abstract: A support element for the mutual support of a fuel injector in a valve seat, in particular of the valve seat of a cylinder head of an internal combustion engine, and of the fuel injector at a fuel distribution line has a clasp and thereon developed radially and axially deformable clips.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: May 1, 2007
    Assignee: Robert Bosch GmbH
    Inventors: Martin Scheffel, Martin Andorfer, Rocco Scholz
  • Publication number: 20060266892
    Abstract: A support element for the mutual bracing of a fuel injector (1) in a valve seat of a cylinder head of an internal combustion engine and the fuel injector (1) at a fuel-distributor line (2) is formed such that the forces acting on the fuel injector (1) act only in the axial direction and have no radial component.
    Type: Application
    Filed: September 10, 2003
    Publication date: November 30, 2006
    Inventors: Martin Scheffel, Werner Berger, Rainer Norgauer
  • Publication number: 20050224053
    Abstract: A support element for the mutual support of a fuel injector in a valve seat, in particular of the valve seat of a cylinder head of an internal combustion engine, and of the fuel injector at a fuel distribution line has a clasp and thereon developed radially and axially deformable clips.
    Type: Application
    Filed: March 25, 2005
    Publication date: October 13, 2005
    Inventors: Martin Scheffel, Martin Andorfer, Rocco Scholz
  • Patent number: 6817341
    Abstract: A compensating element for supporting a fuel injector in a cylinder head of an internal combustion engine is configured in the form of an intermediate ring and situated between a valve housing of the fuel injector and a wall of a receiving bore of the cylinder head. The compensating element has webs at the intermediate ring which extend along the valve housing and on which support segments are affixed which surround the valve housing, thereby distancing the valve housing from the wall of the receiving bore.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: November 16, 2004
    Assignee: Robert Bosch GmbH
    Inventor: Martin Scheffel
  • Publication number: 20040089270
    Abstract: A compensating element for supporting a fuel injector (6) in a cylinder head (7) of an internal combustion engine is configured in the form of an intermediate ring (2) and situated between a valve housing (14) of the fuel injector (6) and a wall (12) of a receiving bore (11) of the cylinder head (7). The compensating element (1) has webs (3) at the intermediate ring (2) which extend along the valve housing (14) and on which support segments (4) are affixed which surround the valve housing (14), thereby distancing the valve housing (14) from the wall (12) of the receiving bore (11).
    Type: Application
    Filed: November 20, 2003
    Publication date: May 13, 2004
    Inventor: Martin Scheffel
  • Patent number: 5865213
    Abstract: The invention relates to an electromagnetically actuated, controllable valve with first and second valve stages, of which the first stage is actuated by an armature and the second stage functions automatically. An opening cross-section of the first valve stage is small and an opening cross-section of the second valve stage is larger than said opening cross section of said first stage. The first valve stage when in a closed position keeps the second valve stage closed. When the first valve stage opens a spring element opens the second valve stage. The valve according to the invention has an advantage of an only slight actuating force, and the total actuating force is actuatable exclusively to the first valve stage, and the further advantage of a large opening cross-section and hence a low flow resistance.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: February 2, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Martin Scheffel, Gerhard Stokmaier, Hans-Friedrich Schwarz
  • Patent number: 5810330
    Abstract: A magnetic valve that switches at high differential pressures and furnishes a large flow cross section. The magnetic valve has an armature, which when current is supplied to a coil is movable toward a pole core counter to the force of a restoring spring. The armature is capable of opening an auxiliary valve of small sealing diameter directly and a main valve of large sealing diameter indirectly. The auxiliary valve and the main valve have a common closing body, which is movable relative to the armature with a limited stroke. The auxiliary valve communicates through a bore of the closing body with the outflow side of the magnetic valve. In the open position of the magnetic valve, the closing body is held in a position that blocks the auxiliary valve by the action of the second restoring spring. The magnetic valve is suitable in particular for slip-controlled hydraulic brake systems of motor vehicles.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: September 22, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Hubert Eith, Helmut Staib, Michael Friedow, Martin Scheffel, Juergen Lander, Gerhard Stokmaier
  • Patent number: 5735582
    Abstract: A valve assembly with a housing, a master valve and an auxiliary valve and an armature for the auxiliary valve and an electromagnet is proposed. In previous valve assemblies, in which the auxiliary valve, openable via the armature, serves to open the master valve, a master valve closing element is coupled via an idle stroke arrangement to the armature of the auxiliary valve closing element. If the armature traverses a first partial stroke, then the auxiliary valve is opened; if the armature traverses a further partial stroke, then via the idle stroke arrangement it can lift the master valve closing element from a master valve seat, if hydraulic forces are slight enough. Instead of the idle stroke arrangement, the master valve closing element is given its own armature, which is rigidly joined to the master valve closing element and acts in the opening direction. The valve assembly of the invention can advantageously be used in hydraulic vehicle brake systems that are set up for automatic braking.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: April 7, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Hubert Eith, Helmut Staib, Michael Friedow, Martin Scheffel, Jurgen Lander, Gerhard Stokmaier, Hans-Friedrich Schwarz
  • Patent number: 5285878
    Abstract: In previously known shock absorbers, a throttle cross section can be controlled with the aid of a control slide. Because flow forces can never be avoided entirely, the magnetic force must be controlled as a function of the flowing pressure fluid flow. In the cylinder proposed here, having a control slide, an additional force acting upon the control slide results, which is directed counter to these flow forces and can at least partially compensate for them. The proposed cylinder is intended in particular for use as a shock absorber for vehicles.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: February 15, 1994
    Assignee: Robert Bosch GmbH
    Inventors: Martin Scheffel, Kurt Engelsdorf, Roland Weisser
  • Patent number: 5265913
    Abstract: A leveling system for vehicles has at least one pressure-fluid-actuated work cylinder disposed between the vehicle body and the wheel suspension, a pressure fluid source and a pressure fluid sink for supplying pressure fluid to the actuator, and a proportional pressure regulating valve for controlling the flow of pressure fluid. The proportional pressure regulating valve has a main valve and a pilot control valve for controlling the main valve control slide into at least three slide positions; in the middle slide position the three controlled valve connections of the main valve are blocked off.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: November 30, 1993
    Assignee: Robert Bosch GmbH
    Inventor: Martin Scheffel
  • Patent number: 5261691
    Abstract: A leveling system for motor vehicles, having two work actuators each assigned to one vehicle axle, between a respective wheel suspension in the vehicle body and having a proportional pressure control valve associated with each actuator. The pressure control valves have three switching positions for alternatingly connecting the pressure chambers of the associated actuators to a pressure fluid source and a pressure fluid tank, and for blocking off the pressure chambers. To prevent unstable driving conditions if the leveling system should fail, it is assured by structural provisions that in the pressure chamber blocking phase of the two actuators their two pressure chambers communicate with one another via a throttle. As a result, greatly different pressures in the two actuators at the moment they are blocked can be equalized, so that the unstable behavior of the vehicle is avoided.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: November 16, 1993
    Assignee: Robert Bosch GmbH
    Inventors: Martin Laichinger, Martin Scheffel
  • Patent number: 5233910
    Abstract: A pressure holding valve for pressure-fluid-actuated leveling systems in vehicles, having at least one seat valve with a valve opening, a valve seat and a valve member in which the valve member is opened by a control piston acted upon by pressure fluid. In order to achieve an absolutely pressure-tight seat valve with a long service life, an elastomer seal which seals off from the valve member is disposed on the valve seat, and pressure equalizing means are provided such that upon an impingement of pressure on the control piston in an opening direction of the seat valve, pressure build up upstream of the valve member is such that only a slight pressure difference arises at the seal at the onset of opening. In addition, the valve member is embodied such that upon displacement in a closing direction of the seat valve, the valve member substantially closes the valve opening in advance of the valve member becoming seated upon the seal.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: August 10, 1993
    Assignee: Robert Bosch GmbH
    Inventors: Martin Laichinger, Martin Scheffel