Patents by Inventor Stefan Bohn

Stefan Bohn 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: 20060267319
    Abstract: A vehicle steering wheel has a gas bag module (10). The gas bag module (10) includes a covering cap (20) and at least one horn contact (22). The covering cap (20) has a central section (36) and an outer rim section (38). The horn contact (22) has a contact element (46) arranged between the central section of the covering cap (36) and a stationary component of the gas bag module (10), such that the horn contact (22) is closed by a depressing of the central section of the covering cap (36) by a particular stroke.
    Type: Application
    Filed: May 11, 2006
    Publication date: November 30, 2006
    Inventors: Ralph Frisch, Stefan Bohn
  • Patent number: 6910712
    Abstract: A method of folding a gas bag for a vehicle occupant restraint system comprises the following steps: unfolding the gas bag between a base and a hold-down, a traction envelope extending around the gas bag and being passed through the hold-down at a first end, a first lead-through of the traction envelope through the hold-down being contoured so as to correspond to that required of the gas bag when folded; pulling out the traction envelope by means of the first end from a space between the base and the hold-down such that the gas bag is pushed together inside the traction envelope. There is further proposed a gas bag folded by such method.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: June 28, 2005
    Assignee: TRW Automotive Safety Systems GmbH & Co. KG
    Inventor: Stefan Bohn
  • Publication number: 20040183288
    Abstract: A driver's gas bag module includes a gas bag (18) which in relation to an inflated state has a front wall (22) facing a driver (A), a central section (24) of the front wall in the inflated state having an indentation (26). The indentation is created by the central section (24) at least partially being prevented from a movement in the direction out from the gas bag module (10). The front wall (22), in relation to the center (28) of the indentation (26), has an upper region (30) and a lower region (32), an outer edge (36) of the upper region (30) having three substantially straight sections (36a, 36b, 36c).
    Type: Application
    Filed: January 29, 2004
    Publication date: September 23, 2004
    Applicant: TRW Automotive Safety Systems GmbH
    Inventors: Kadri Aygun, Stefan Bohn, Lutz Haese, Andreas Deisel
  • Patent number: 6773027
    Abstract: A gas bag for a vehicle occupant restraint system has a covering forming a main chamber of the gas bag, with a passage opening, and an inner bag with an inflow opening and at least one ventilation opening. An edge of the inflow opening of the inner bag is connected with an edge of the passage opening and the gas bag has in a region of the connection of covering and inner bag a constriction for the inner bag. In a folded state of the gas bag, the inner bag is turned in into an interior of the covering and is able to emerge from the covering through the passage opening during an inflation of the gas bag.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: August 10, 2004
    Assignee: TRW Automotive Safety Systems GmbH
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Patent number: 6740025
    Abstract: A method of folding a gas bag for a vehicle occupant restraint system comprises the following steps: first, the gas bag is unfolded between a base and an opposing surface. A spacing is provided between the base and the opposing surface, which corresponds to a height of a housing into which the gas bag is to be inserted after folding. Then, a folding funnel is provided which comprises one end having a large cross-section and one end having a small cross-section, the large cross-section being larger than or equal to a cross-section of the gas bag when unfolded between the base and the opposing surface, and the small cross-section corresponding to a cross-section of the housing; beginning with its large cross-section. Finally, the folding funnel is placed over the unfolded gas bag and moved relative thereto such that the gas bag is pushed together on the base by the folding funnel to the small cross-section.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: May 25, 2004
    Assignee: TRW Automotive Safety Systems GmbH & Co. KG
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Patent number: 6726244
    Abstract: An apparatus for folding an airbag for a vehicle occupant restraint system comprises a base for the airbag to be folded, a cover for the airbag, and a flexible element that is arranged between the base and the cover and has first and second ends. The first end of the flexible element is held between the base and the cover. The apparatus further comprises a traction means that acts upon the second end of the flexible element, and a pressure generating means with which the airbag can be acted upon with compressed gas. The invention further relates to a method of folding an airbag and making use of such an apparatus. Still further, the invention relates to a folded airbag produced by such a method.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: April 27, 2004
    Assignee: TRW Automotive Safety Systems GmbH & Co. KG
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Patent number: 6726245
    Abstract: The invention relates to a gas bag module comprising a gas bag with a gas bag wall which has a front and a rear wall section. A depression is provided which has a mouth and runs in an inflated state of the gas bag from the front wall section to the rear wall section, which depression is formed in that a part of the gas bag wall is prevented from an unimpeded movement away from the module on unfolding of the gas bag. The module further comprises at least one closure piece which is fastened to the gas bag wall such that in the inflated state it moves in front of the mouth of the depression and closes the depression.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: April 27, 2004
    Assignee: TRW Automotive Safety Systems GmbH & Co. KG
    Inventors: Joachim Fellhauer, Stefan Bohn
  • Publication number: 20040056462
    Abstract: An apparatus for folding an airbag for a vehicle occupant restraint system comprises a base for the airbag to be folded, a cover for the airbag, and a flexible element that is arranged between the base and the cover and has first and second ends. The first end of the flexible element is held between the base and the cover. The apparatus further comprises a traction means that acts upon the second end of the flexible element, and a pressure generating means with which the airbag can be acted upon with compressed gas. The invention further relates to a method of folding an airbag and making use of such an apparatus. Still further, the invention relates to a folded airbag produced by such a method.
    Type: Application
    Filed: September 24, 2003
    Publication date: March 25, 2004
    Applicant: TRW Automative Safety Systems GmbH & Co. KG
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Publication number: 20040045647
    Abstract: A method of folding a gas bag for a vehicle occupant restraint system comprises the following steps: first, the gas bag is unfolded between a base and an opposing surface. A spacing is provided between the base and the opposing surface, which corresponds to a height of a housing into which the gas bag is to be inserted after folding. Then, a folding funnel is provided which comprises one end having a large cross-section and one end having a small cross-section, the large cross-section being larger than or equal to a cross-section of the gas bag when unfolded between the base and the opposing surface, and the small cross-section corresponding to a cross-section of the housing; beginning with its large cross-section. Finally, the folding funnel is placed over the unfolded gas bag and moved relative thereto such that the gas bag is pushed together on the base by the folding funnel to the small cross-section.
    Type: Application
    Filed: August 11, 2003
    Publication date: March 11, 2004
    Applicant: TRW Automotive Safety Systems GmbH & Co., KG
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Publication number: 20030234528
    Abstract: A gas bag for a vehicle occupant restraint system has a covering forming a main chamber of the gas bag, with a passage opening, and an inner bag with an inflow opening and at least one ventilation opening. An edge of the inflow opening of the inner bag is connected with an edge of the passage opening and the gas bag has in a region of the connection of covering and inner bag a constriction for the inner bag. In a folded state of the gas bag, the inner bag is turned in into an interior of the covering and is able to emerge from the covering through the passage opening during an inflation of the gas bag.
    Type: Application
    Filed: June 9, 2003
    Publication date: December 25, 2003
    Applicant: TRW Automotive Safety Systems GmbH
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Patent number: 6595549
    Abstract: A gas bag module comprises a gas bag which has a front wall for the impact of an occupant. The gas bag is formed by a gas bag wall of several fabric parts. At least one of the fabric parts forms the front wall having an opening from which, in an inflated state of the gas bag, a depression originates, which is formed in that a center section of the gas bag wall on inflation is prevented from a free movement and is held back. The gas bag has around the depression an annular chamber which is to be filled. The opening is constructed in a slit shape.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: July 22, 2003
    Assignee: TRW Automotive Safety Systems GmbH & Co., KG
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Patent number: 6588798
    Abstract: The invention relates to a gas bag module comprising a gas bag including a gas bag wall which has a front and a rear wall section and including at least one chamber. The gas bag further comprises an indentation running from the front wall section in an inflated state in a direction toward the rear wall section. The indentation is formed in that a part of the gas bag wall is prevented from an unimpeded movement towards outside of the module on unfolding of the gas bag. The gas bag, in a region of a mouth of the indentation, has a bubble-like inflatable extension in flow connection with the at least one chamber of the gas bag, which extension closes the indentation.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: July 8, 2003
    Assignee: TRW Automotive Safety Systems GmbH & Co. KG
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Publication number: 20030052480
    Abstract: A method of folding a gas bag for a vehicle occupant restraint system comprises the following steps: unfolding the gas bag between a base and a hold-down, a traction envelope extending around the gas bag and being passed through the hold-down at a first end, a first lead-through of the traction envelope through the hold-down being contoured so as to correspond to that required of the gas bag when folded; pulling out the traction envelope by means of the first end from a space between the base and the hold-down such that the gas bag is pushed together inside the traction envelope. There is further proposed a gas bag folded by such method.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 20, 2003
    Applicant: TRW Automotive Safety Systems GmbH & Co. KG
    Inventor: Stefan Bohn
  • Publication number: 20030054933
    Abstract: A method of folding a gas bag for a vehicle occupant restraint system comprises the following steps: first, the gas bag is unfolded between a base and an opposing surface. A spacing is provided between the base and the opposing surface, which corresponds to a height of a housing into which the gas bag is to be inserted after folding. Then, a folding funnel is provided which comprises one end having a large cross-section and one end having a small cross-section, the large cross-section being larger than or equal to a cross-section of the gas bag when unfolded between the base and the opposing surface, and the small cross-section corresponding to a cross-section of the housing; beginning with its large cross-section. Finally, the folding funnel is placed over the unfolded gas bag and moved relative thereto such that the gas bag is pushed together on the base by the folding funnel to the small cross-section.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 20, 2003
    Applicant: TRW Automotive Safety Systems GmbH & Co. KG
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Patent number: 6431599
    Abstract: The invention relates to a gas bag module comprising a gas bag, an outer contour of the gas bag being defined by a gas bag wall which has a front wall for the impact of an occupant with a centric opening as a transition to an indentation in the gas bag. The indentation is formed in that during inflation a center portion of the gas bag wall is prevented from freely moving and is restrained. A closure part is provided which encloses one of the indentation and the opening and engages the gas bag wall. A traction device is provided which is connected with the closure part. The traction device is attached such that due to a deployment of the gas bag a tensile force is exerted on the traction device and the tensile force is passed on to the closure part, and one of the indentation and the opening is at least partly closed.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: August 13, 2002
    Assignee: TRW Automotive Safety Systems GmbH & Co. KG
    Inventor: Stefan Bohn
  • Publication number: 20020105179
    Abstract: The invention relates to a gas bag module comprising a gas bag including a gas bag wall which has a front and a rear wall section and including at least one chamber. The gas bag further comprises an indentation running from the front wall section in an inflated state in a direction toward the rear wall section. The indentation is formed in that a part of the gas bag wall is prevented from an unimpeded movement towards outside of the module on unfolding of the gas bag. The gas bag, in a region of a mouth of the indentation, has a bubble-like inflatable extension in flow connection with the at least one chamber of the gas bag, which extension closes the indentation.
    Type: Application
    Filed: January 30, 2002
    Publication date: August 8, 2002
    Applicant: TRW Automotive Safety Systems GmbH & Co. KG
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Publication number: 20020105171
    Abstract: The invention relates to a gas bag module comprising a gas bag with a gas bag wall which has a front and a rear wall section. A depression is provided which has a mouth and runs in an inflated state of the gas bag from the front wall section to the rear wall section, which depression is formed in that a part of the gas bag wall is prevented from an unimpeded movement away from the module on unfolding of the gas bag. The module further comprises at least one closure piece which is fastened to the gas bag wall such that in the inflated state it moves in front of the mouth of the depression and closes the depression.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 8, 2002
    Applicant: TRW Automotive Safety Systems GmbH & Co. KG
    Inventors: Joachim Fellhauer, Stefan Bohn
  • Publication number: 20020084640
    Abstract: The invention relates to a gas bag module comprising a gas bag, an outer contour of the gas bag being defined by a gas bag wall which has a front wall for the impact of an occupant with a centric opening as a transition to an indentation in the gas bag. The indentation is formed in that during inflation a center portion of the gas bag wall is prevented from freely moving and is restrained. A closure part is provided which encloses one of the indentation and the opening and engages the gas bag wall. A traction means is provided which is connected with the closure part. The traction means is attached such that due to a deployment of the gas bag a tensile force is exerted on the traction means and the tensile force is passed on to the closure part, and one of the indentation and the opening being at least partly closed.
    Type: Application
    Filed: December 26, 2001
    Publication date: July 4, 2002
    Applicant: TRW Automotive Safety Systems GmbH & Co. KG
    Inventor: Stefan Bohn
  • Publication number: 20020043793
    Abstract: An apparatus for folding an airbag for a vehicle occupant restraint system comprises a base for the airbag to be folded, a cover for the airbag, and a flexible element that is arranged between the base and the cover and has first and second ends. The first end of the flexible element is held between the base and the cover. The apparatus further comprises a traction means that acts upon the second end of the flexible element, and a pressure generating means with which the airbag can be acted upon with compressed gas. The invention further relates to a method of folding an airbag and making use of such an apparatus. Still further, the invention relates to a folded airbag produced by such a method.
    Type: Application
    Filed: October 11, 2001
    Publication date: April 18, 2002
    Applicant: TRW Automotive Safety Systems GmbH & Co. KG
    Inventors: Stefan Bohn, Joachim Fellhauer
  • Publication number: 20020005632
    Abstract: A gas bag module comprises a gas bag which has a front wall for the impact of an occupant. The gas bag is formed by a gas bag wall of several fabric parts. At least one of the fabric parts forms the front wall having an opening from which, in an inflated state of the gas bag, a depression originates, which is formed in that a center section of the gas bag wall on inflation is prevented from a free movement and is held back. The gas bag has around the depression an annular chamber which is to be filled. The opening is constructed in a slit shape.
    Type: Application
    Filed: July 11, 2001
    Publication date: January 17, 2002
    Applicant: TRW Automotive Safety Systems GmbH & Co. KG
    Inventors: Stefan Bohn, Joachim Fellhauer