Patents by Inventor Frieder Hofmann

Frieder Hofmann 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: 20200173284
    Abstract: A disclosed system includes an impeller for a ventilator. The impeller includes a hub or hub ring configured to rotate about an axis and a plurality of vanes attached to the hub or hub ring. Each vane of the impeller has a leading edge facing a pressure side of the ventilator along the axis, and a trailing edge facing a suction side of the ventilator along the axis. The leading edge of each vane has a corrugated shape characterized by a first wavelength and the trailing edge has a corrugated shape characterized by a second wavelength, with the first wavelength being longer than the second wavelength. The impeller may further include injection molded plastic, die-cast aluminum, stamped sheet metal, or laser cut sheet metal that is embossed. The impeller may further be assembled from separately manufactured pieces that are secured to one another using joining, welding, or by interlocking tabs.
    Type: Application
    Filed: June 18, 2018
    Publication date: June 4, 2020
    Inventors: Tobias GAUSS, Daniel SEIFRIED, Thomas BITZ, Frieder LOERCHER, Georg HOFMANN, Sven LOENNE
  • Publication number: 20200173501
    Abstract: A return stop includes a rotational inner ring, a stationary, fixed outer ring, and a cage mounted radially between the inner ring and outer ring. The cage has at least two pairs of rollers each having a first and a second roller. A clamping rail is formed on an outer peripheral surface of the inner ring for each roller. A radial recess is formed on the inner ring in the peripheral direction directly adjacent to the respective clamping rail. Also, both of the clamping rails of the roller pairs are formed in the peripheral direction in opposite directions away from each other. In a free-running operation of the return stop, only one roller of each pair of rollers comes into position on the inner ring and the outer ring. The other roller of each pair of rollers does not come into position at least one the inner ring.
    Type: Application
    Filed: July 12, 2018
    Publication date: June 4, 2020
    Applicant: Schaeffler Technologies AG & Co. KG
    Inventors: Alexander Reimchen, Frieder Altmann, Stefan Hofmann
  • Patent number: 10550854
    Abstract: An impeller wheel for fans has a bottom disc, a cover disc, and three-dimensionally shaped blades connected to the bottom disc and the cover disc. The bottom disc, cover disc, and the blades form a one-piece part. The blades have a leading edge and a trailing edge, wherein the leading edge and the trailing edge each have a median diameter. In a projection onto a cylinder that is coaxial with a rotation axis of the impeller wheel and has a diameter matching a median diameter of the trailing edge or of the leading edge, a first extension of the trailing edge and/or the leading edge is positioned at a first angle and a second extension of the trailing edge and/or the leading edge is positioned at a second angle relative to a line parallel to the rotation axis. At least one of the first and second angles is different from 0°.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: February 4, 2020
    Assignee: Ziehl-Abegg SE
    Inventors: Frieder Lörcher, Andreas Gross, Sandra Hub, Lothar Ernemann, Georg Hofmann
  • Publication number: 20190231693
    Abstract: The present invention provides lyophilized formulations of active agents, particularly of TAT-NR2B9c including histidine, trehalose and lysine. TAT-NR2B9c has shown promise for treating stroke, aneurysm, subarachnoid hemorrhage and other neurological or neurotraumatic conditions. Such formulations are stable at ambient temperature thus facilitating maintenance of supplies of such a formulation in ambulances for administration at the scene of illness or accident or in transit to a hospital.
    Type: Application
    Filed: January 2, 2019
    Publication date: August 1, 2019
    Applicant: NoNO Inc.
    Inventors: Jonathan David Garman, Frieder Hofmann
  • Patent number: 10206878
    Abstract: The present invention provides lyophilized formulations of active agents, particularly of TAT-NR2B9c including histidine, trehalose and lysine. TAT-NR2B9c has shown promise for treating stroke, aneurysm, subarachnoid hemorrhage and other neurological or neurotraumatic conditions. Such formulations are stable at ambient temperature thus facilitating maintenance of supplies of such a formulation in ambulances for administration at the scene of illness or accident or in transit to a hospital.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: February 19, 2019
    Assignee: NoNO Inc.
    Inventors: Jonathan David Garman, Frieder Hofmann
  • Patent number: 4981425
    Abstract: Device which serves to atomize a solid or liquid medium with the aid of a standing ultrasonic wave that is generated between two ultrasonic transmitters. This allows one to tune the standing ultrasonic wave automatically when the temperature of the medium or other process parameters should change.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: January 1, 1991
    Assignee: Battelle-Institut E.V.
    Inventors: Ernst-Gunter Lierke, Klaus Luhmann, Sigurd Jonsson, Michael Hohmann, Lothar Bendig, Frieder Hofmann, Reinhard Gaa
  • Patent number: 4796807
    Abstract: An ultrasonic atomizer for liquids comprises a piezoelectric transducer (16) mechanically coupled to an amplitude transformer (20), an atomizing disk (21) mounted to the free end of the amplitude transformer (20), a housing (22) enclosing at least the amplitude transformer (20) and a cap (30) supporting a sieve-like diaphragm (31). The cap (30) is so mounted to the housing (22) that the diaphragm (31) rests on the atomizing disk (21). The cap (30) consists of two mutually concentric cap parts (32, 33) of which one (32) supports the diaphragm (31) and the second (33) serves to mount the entire cap (30) on the housing (22). A spring (36) is so mounted between the two cap parts (32, 33) that the sieve-like diaphragm (31) is held elastically against the atomizing disk (21) and that the opposing force from the spring (36) thereby is transmitted into the second cap part (33) fixed in the housing.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: January 10, 1989
    Assignee: Lechler GmbH & C. KG
    Inventors: Lothar Bendig, Frieder Hofmann
  • Patent number: 4614109
    Abstract: The invention pertains to a method and device for testing the permeability of membrane filters by submitting a wetted membrane filter on its inlet side to a predetermined testing gas pressure within a first closed system and by measuring pressure variation over time within the closed system. The object of the method of the invention is a sensitive testing method permitting permeability, and thus pore size, of a membrane filter to be determined exclusively by measurements performed on the inlet side of the membrane filter. Such measurement is performed by measuring a pressure differential with respect to a reference pressure, or by measuring the quantity of gas per unit of time flowing with respect to a reference pressure system, or else by measuring the pressure differential twice and draining, during the second measurement, a predetermined quantity of gas from the space being tested.
    Type: Grant
    Filed: July 15, 1985
    Date of Patent: September 30, 1986
    Assignee: Brunswick Corporation
    Inventor: Frieder Hofmann