Patents by Inventor Klaus Dohring

Klaus Dohring 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: 6343983
    Abstract: In a ventilation box (2) of a motor vehicle, the ventilation box being composed of a plurality of housing parts (5-7), housing parts (6, 7) arranged in the region of a steering column (3) are formed to be fastened selectively on the left or the right side of the motor vehicle. As a result, the ventilation box (2) can be converted for the respective motor vehicle, irrespective of the position of the steering column (3).
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: February 5, 2002
    Assignee: Mannesmann VDO AG
    Inventors: Klaus Döhring, Klaus-Jürgen Kurr, Rolf Wich
  • Patent number: 6312011
    Abstract: A steering wheel is fastened on a steering column by a steering wheel hollow (1). Within this steering wheel hollow (1), an airbag (15) is fastened on a plate (11) which in the rest position bears against the base (2) of the steering wheel hollow (1) and, as the airbag (15) inflates, the plate is displaced within the steering wheel hollow (1) away from the base (2). The steering wheel has travel limitation members (screw 12) for the maximum possible travel of the plate (11). Release of the airbag (15) produces a free space (16) between the plate (11) and the base (2) of the steering wheel hollow (1), which free space is formed so as to receive end regions of spokes (4, 5), which end regions are remote from a steering wheel rim (6).
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: November 6, 2001
    Assignee: Mannesmann VDO AG
    Inventors: Klaus Döhring, Veit Kaufmann
  • Patent number: 6302933
    Abstract: The separator (1) has a tubular inlet opening (2) and two tubular outlet openings (3, 4) which are connected with one another in a flow-carrying manner. A separating device (6) is disposed in the flow direction (5) between the inlet opening (2) and the outlet openings (3, 4). One of the outlet openings (3) carries substantially only separated liquid and the other outlet opening (4) carries substantially only gas freed of liquid. An outer tube (7) surrounds an inner tube (8) with an all-around space between them. The inner tube (8) is connected at one end to the inlet opening (2) in a flow-carrying manner, and at the other end is associated with the outlet opening (3) for the separated liquid.
    Type: Grant
    Filed: November 11, 1998
    Date of Patent: October 16, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Wolfgang Krause, Karl-Heinrich Spies, Klaus Döhring, Klaus Kurr
  • Patent number: 6086474
    Abstract: A ventilating device (1) for a motor vehicle, having a ventilation opening (5) arranged in the central region of an instrument panel (2) and/or a ventilation opening (5) arranged in a center, console which can be connected optionally to a suction side or a pressure side of a fan having an air filter. Ventilation openings arranged in a lateral region of the instrument panel (2) can be connected to the pressure side of the fan. This makes it possible for air which has been used, for example, by a smoker in the front region of the motor vehicle to be cleaned particularly quickly.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: July 11, 2000
    Assignee: Mannesmann VDO AG
    Inventor: Klaus Dohring
  • Patent number: 5947483
    Abstract: A seal of an elastomeric material used to mount an intake manifold in a gas-tight manner on the cylinder head of an internal combustion engine is disclosed. The seal is formed to blend together in one piece and is located in position on the side of the intake-manifold flange facing the cylinder head. The seal has sealing surfaces, which sealingly surround the periphery of the intake pipes of the intake manifold during normal operational use. The sealing surfaces are interconnected by web segments, and at least one of the web segments is designed in one area of its extent to act as a linear tolerance compensation segment, to be flexurally soft and/or capable of folding together.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: September 7, 1999
    Assignee: Firma Carl Freudenberg
    Inventors: Michael Brummer, Klaus Dohring
  • Patent number: 5704327
    Abstract: An intake pipe of an internal combustion engine is disclosed. The intake pipe has a dimensionally stable intake pipe body with a passthrough opening, and a positioning element arranged in the passthrough opening to change the area of flow cross section. The positioning element is constructed of a nonreturn valve opening only toward the internal combustion engine, the nonreturn valve comprising a sealing element and a sealing seat which can move relative to one another and which can be brought, as required, into engagement with one another to close off the passthrough opening.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: January 6, 1998
    Assignee: Firma Carl Freudenberg
    Inventor: Klaus Dohring
  • Patent number: 5590888
    Abstract: A seal of an elastomeric material used to mount an intake manifold in a gas-tight manner on the cylinder head of an internal combustion engine is disclosed. The seal is formed to blend together in one piece and is located in position on the side of the intake-manifold flange facing the cylinder head. The seal has sealing surfaces, which sealingly surround the periphery of the intake pipes of the intake manifold during normal operational use. The sealing surfaces are interconnected by web segments, and at least one of the web segments is designed in one area of its extent to act as a linear tolerance compensation segment, to be flexurally soft and/or capable of folding together.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: January 7, 1997
    Assignee: Firma Carl Freudenberg
    Inventors: Michael Brummer, Klaus Dohring
  • Patent number: 5584270
    Abstract: An intake a pipe of an internal combustion engine is disclosed. The intake pipe has a dimensionally stable intake pipe body with a passthrough opening, and a positioning element arranged in the passthrough opening to change the area of flow cross section. The positioning element is constructed of a nonreturn valve opening only toward the internal combustion engine, the nonreturn valve comprising a sealing element and a sealing seat which can move relative to one another and which can be brought, as required, into engagement with one another to close off the passthrough opening.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: December 17, 1996
    Assignee: Firma Carl Freudenberg
    Inventor: Klaus Dohring
  • Patent number: 5505590
    Abstract: An improved torque converter assembly utilizing or making use of the same or similar composite materials for each component of the torque converter to result in a high strength yet light weight torque converter assembly which may be easily recycled. Further, the torque converter includes a unique hub member having integral fingers radially extending therefrom for use in bonding hub member to a multi-bladed body such as a turbine, wherein the fingers are circumferentially spaced about an outer circumferential surface on the hub member such that the spacing between a common finger and adjacent fingers on each side thereof is not equal. Such a hub member distributes the loads and stresses onto different planes extending radially and transverse the longitudinal axis of the hub member.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: April 9, 1996
    Assignee: Freudenberg-NOK General Partnership
    Inventor: Klaus Dohring
  • Patent number: 5487366
    Abstract: An intake manifold for use with a combustion engine is disclosed. The intake manifold comprises a dimensionally stable induction pipe body having at least one first flow-through opening and at least one first adjusting element arranged in the first flow-through opening to vary the available cross-sectional area of the passage. This adjusting element takes the form of a throttle valve, which is rotatably supported in the induction pipe body and which is capable of being forced to engage sealingly with the boundary wall of the first flow-through opening. In the area of the throttle valve, the induction pipe body has at least one second flow-through opening, which is allocated as a by-pass so as to be adjacent to the first flow-through opening, said second flow-through opening being capable of being sealed by at least one second adjusting element, which is comprised of a one-way valve that is only able to be forced into an open position in the direction of the attached combustion engine.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: January 30, 1996
    Assignee: Firma Carl Freudenberg
    Inventor: Klaus Dohring
  • Patent number: 5435279
    Abstract: A method for closing a non-circular opening in a plastic intake pipe of an internal combustion engine with a cover having a shape adapted to that of the opening includes the step of introducing the cover through the opening from outside the pipe by tilting the cover relative to the opening. The cover is then tilted within the plastic intake pipe to such an extent that the cover completely covers both the opening from the inside in a form-locking manner and an edge region of the plastic intake pipe which surrounds the opening.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: July 25, 1995
    Assignee: Firma Carl Freudenberg
    Inventors: Michael Brummer, Chris Andrews, Klaus Dohring
  • Patent number: 5341772
    Abstract: An intake manifold for an internal combustion engine having a cylinder head is disclosed. The intake manifold includes at least one intake pipe with an intake flange for leak-free attachment of the manifold to the cylinder head by way of a sealing element. A bypass line is provided for feeding a secondary gas into the intake opening of the internal combustion engine. The secondary gas is fed into the bypass line through a connection, preferably a hose connection. The bypass line is formed by a groove in the intake flange which is open in the direction of the cylinder head and delimited on one side by the intake flange and on the other side by a sealing element. The connection is connected to one end of the groove, and the intake opening is connected to the other end of the groove.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: August 30, 1994
    Assignee: Firma Carl Freudenberg
    Inventors: Klaus Dohring, Tom Boardman, Chris Andrews
  • Patent number: 5317995
    Abstract: An intake pipe assembly for an internal combustion engine is described. The intake pipe assembly includes an intake pipe and a safety valve which can be brought into an open position by the presence of a pressure on the inside of the intake pipe which exceeds a pressure of the surrounding atmosphere.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: June 7, 1994
    Assignee: Firma Carl Freudenberg
    Inventors: Michael Brummer, Detlef Cordts, Klaus Dohring
  • Patent number: 5295460
    Abstract: A hydraulic valve play equalization element for the valve drive of an internal combustion engine is disclosed. The equalization element comprises an inner tappet and an outer tappet arranged to move relative to one another in the axial direction. The outside tappet is formed by an essentially cup-shaped housing with a level bottom and the inside tappet and the outside tappet delimit an oil-filled storage space which is sealed towards the outside and which can change in volume. A displacement element to equalize volume changes is enclosed in the storage space. The outside tappet is formed by an essentially tube-shaped mantle of thermoplastic material, which has slide surfaces radially inside and outside. The mantle is closed off with a fluid seal, by a disk structured as an expeller, in the direction of a cam shaft that is used. The inside slide surface encloses the inside tappet, resting against its circumference, and forming a fluid seal.
    Type: Grant
    Filed: February 3, 1993
    Date of Patent: March 22, 1994
    Assignee: Firma Carl Freudenberg
    Inventors: Klaus Dohring, Wolfgang Krause
  • Patent number: 5213072
    Abstract: A valve actuating mechanism in the cylinder head of a combustion engine is disclosed. The mechanism has a cup-type tappet lifter which is attached to a valve stem, a retaining mechanism affixed to the valve stem and the tappet lifter, and at least one valve spring, which is braced on one side on the cylinder head and on the other side against the valve spring retainer disk. The cup-type tappet lifter and the valve spring retainer disk are formed in one piece. Several mechanisms are disclosed for retaining the tappet lifter onto the valve stem.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: May 25, 1993
    Assignee: Firma Carl Freudenberg
    Inventor: Klaus Dohring
  • Patent number: 5107806
    Abstract: A hydraulic valve-clearance compensating element for internal combustion engines in which an internal valve stem is capable of being axially shifted relative to an external stem such that, together with the latter, it delimits an oil-filled storage chamber. The volume of the storage chamber may be altered and is sealed to the outside by a gasket. At least one compressible displacement member is included in the storage chamber to offset changes in volume. This displacement member is made of a closed-celled soft foam with a non-porous surface layer.
    Type: Grant
    Filed: August 21, 1991
    Date of Patent: April 28, 1992
    Assignee: Firma Carl Freudenberg
    Inventors: Klaus Dohring, Volker Budde