Patents by Inventor Ralf Drews

Ralf Drews 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: 20230415930
    Abstract: A valve bag filling device for filling powdered filling material into a valve bag is provided, and has a filling spout (1), which is provided so as to be introduced into a valve hose of a valve bag to be filled. The device has a conveying device for conveying the filling material to be filled from a supply tank through the filling spout (1) into a valve bag resting on the filling spout (1) with the valve hose, as well as a suction device (3, 4) for aspirating excess filling material via a suction opening (5). The suction opening (5) is arranged spaced a distance (9, 10) from the filling spout (1). A control device is provided, with which the suction opening (5) can be traversed in a direction (6) in relation to the filling spout (1).
    Type: Application
    Filed: June 21, 2023
    Publication date: December 28, 2023
    Inventors: Alexander BOJE, Bernd TILLACK, Ralf DREWS, Alexander MILDNER
  • Publication number: 20230415935
    Abstract: A closure device (2) for closing a flexible container (4), in particular a valve bag (4), has a welding device (14), a sensor device (20) for acquiring a position of a part of the container (4) to be closed (6), and a control unit (28). The control unit (28) is coupled with the sensor device (20) and with the welding device (14), and is configured to place the welding device (14) in a first position and a second position spaced apart from the first position on the part of the container (4) to be closed (6) by actuating at least one moving device, to detect when at least one of the two positions has been reached via the sensor unit (20), and to actuate the welding device (14) at the respective first and second position to generate a weld seam on the container (4).
    Type: Application
    Filed: June 21, 2023
    Publication date: December 28, 2023
    Inventors: Alexander BOJE, Bernd TILLACK, Ralf DREWS, Alexander MILDNER
  • Patent number: 8212211
    Abstract: The invention provides a system and process in which more than only one category of information must be made available in an optically simultaneously recognizable form to a person in a portable system (17) for protecting and/or guiding persons in dangerous situations, firefighters or rescue teams in buildings. The system includes an infrared camera (12) for recording data, especially heat image data; an energy supply device, especially a battery; at least one interface (18) for transmitting data; and at least one display device (16), especially a monitor and/or a warning light, for visually displaying data. At least one exit finder (13) and/or at least one gas sensor (14) and/or at least one motion detector is also provided.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: July 3, 2012
    Assignee: Dräger Safety AG & Co. KGaA
    Inventors: Ralf Drews, Stefan Morley
  • Publication number: 20090184244
    Abstract: The invention provides a system and process in which more than only one category of information must be made available in an optically simultaneously recognizable form to a person in a portable system (17) for protecting and/or guiding persons in dangerous situations, firefighters or rescue teams in buildings. The system includes an infrared camera (12) for recording data, especially heat image data; an energy supply device, especially a battery; at least one interface (18) for transmitting data; and at least one display device (16), especially a monitor and/or a warning light, for visually displaying data. At least one exit finder (13) and/or at least one gas sensor (14) and/or at least one motion detector is also provided.
    Type: Application
    Filed: December 4, 2008
    Publication date: July 23, 2009
    Applicant: DRAGER SAFETY AG & CO. KGAA
    Inventors: Ralf DREWS, Stefan MORLEY
  • Patent number: 7336191
    Abstract: A gas-measuring system is provided that is suitable for both mobile and stationary use. A mobile measuring device (2) with sensors (4, 5, 6, 7) for detecting gas concentrations and a base station (3) are provided for this purpose. The mobile measuring device (2) is inserted into a holder (31) of the base station (3) and the operating functions to the measuring device (2) are now switched over to the base station (3).
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: February 26, 2008
    Assignee: Dräger Safety AG & Co. KGaA
    Inventors: Ralf Drews, Ingo Pooch
  • Publication number: 20070063828
    Abstract: A gas-measuring system is provided that is suitable for both mobile and stationary use. A mobile measuring device (2) with sensors (4, 5, 6, 7) for detecting gas concentrations and a base station (3) are provided for this purpose. The mobile measuring device (2) is inserted into a holder (31) of the base station (3) and the operating functions to the measuring device (2) are now switched over to the base station (3).
    Type: Application
    Filed: May 19, 2006
    Publication date: March 22, 2007
    Applicant: DRAGER SAFETY AG & CO. KGAA
    Inventors: Ralf DREWS, Ingo POOCH
  • Publication number: 20030200969
    Abstract: A gas mask (1) is provided with a sealing element (5) of a special shape. The sealing element is easy to handle for use with a plug-in breathing filter (4). The sealing element also provides good sealing against gases from the environment. The sealing element (5) of the gas mask (4) seals the outlet (3) for the breathing filter (4) all around and has a cross section that is limited axially by two parallel, flat, peripheral surfaces (51, 52), whose radial inner limiting surface (53) is concave, and whose radial outer limiting surface (54) extends axially from the outside to the inside first concavely and passes over in the middle area into an elevation (55) tapering outwardly in the radial direction.
    Type: Application
    Filed: February 10, 2003
    Publication date: October 30, 2003
    Inventors: Hartmut Kintzel, Ralf Drews, Markus Kater
  • Patent number: 6338341
    Abstract: A protective breathing mask has a connector housing unit having a connector housing for accommodating breathing mask components. The connector housing unit has a flange-like collar extending from the connector housing. The flange-like collar has a connecting rim. A mask body made of an elastomer has a profile-reinforced portion defining a cutout for the connector housing unit and the profile-reinforced portion is shaped to match the peripheral rim. A clamping ring is provided for fixedly securing the profile-reinforced portion at the connecting rim. The clamping ring has a slot for holding the profile-reinforced portion. The clamping ring is shaped to match the connecting rim of the flange-like collar and has a connecting surface for connecting the clamping ring to the collar at the connecting rim.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: January 15, 2002
    Assignee: Dräger Sicherheitstechnik GmbH
    Inventors: Ralf Drews, Hartmut Kintzel
  • Patent number: 5704348
    Abstract: A breathing valve with a valve disk lying on a valve crater and with a valve spring, which is in contact with the valve disk. A first spring end is provided in contact with a support surface and a second spring end is provided. The valve disk is accommodated in a guide displaceable along an axial valve axis, and the valve spring is fastened such that the line of action of the spring is directed at an angle in relation to the valve axis. The valve is extensively prevented from vibrating.
    Type: Grant
    Filed: October 10, 1996
    Date of Patent: January 6, 1998
    Assignee: Dragerwerk Aktiengesellschaft
    Inventor: Ralf Drews
  • Patent number: 5625902
    Abstract: A protective hood (1) made of an elastic, elastomeric, gas-impermeable material, with a head area (2) and a neck area (4) joining the head area (2) with its top end (3), is to be improved such that good seating of the protective hood is achieved at different head sizes. This object is accomplished by the protective hood (1) being made in one piece according to the dipping process by means of a plate-shaped mold, the material of the protective hood having an elongation at tear greater than or equaling 600% and a modulus 100% of 0.15 to 1.3 N/mm.sup.3, and that with the protective hood (1) folded up flat, the greatest width (10) of the head area (2) is 250 mm to 340 mm and preferably about 287 mm.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: May 6, 1997
    Assignee: Dr agerwerk AG
    Inventors: Ralf Drews, Hartmut Kintzel
  • Patent number: 5601078
    Abstract: A breathing apparatus with a display unit for the transmission of measured data via a display field of the display unit into the field of vision of a person wearing the unit. The readability of the measured data displayed is improved in daylight with simultaneously reduced energy demand. The display field includes an LC display, which is at least transparent for transmission radiation. An optical concentrator is provided, which collects the ambient light via a light entering surface and emits the collected light via a light exiting surface.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: February 11, 1997
    Assignee: Dragerwerk AG
    Inventors: Uwe Schaller, Detlef Wolter, Hansjochen Schuck, Ralf Drews
  • Patent number: 5515846
    Abstract: A respirator including a mask body with a breathing filter at a breathing connection of the mask body, with a cuff accommodating the breathing filter and with a bellows, which seals the mask interior against the environment. The bellows is connected to the cuff and to the mask body. The breathing filter is locked in the position of use based on the bellows being made in one piece with the breathing connection, as a continuation of the mask body. The bellows surrounds the cuff in the manner of a truncated cone, in at least one partial section of the extent of the breathing filter.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: May 14, 1996
    Assignee: Dragerwerk AG
    Inventor: Ralf Drews