Patents by Inventor Hans Foerster

Hans Foerster 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).

  • Nuclear magnetic resonance spectrometer
    Patent number: 5760586
    Abstract: A probehead in a nuclear magnetic resonance spectrometer is disclosed. The probehead comprises a sample holder supporting a sample under investigation. The sample is spinned about a spinning axis. The sample holder is tilted with its spinning axis by an angle with respect to a probehead longitudinal axis. The longitudinal axis coincides with the principal direction of a surrounding constant magnetic field. A servo-mechanical actuator is provided for varying the angle. The actuator is driven by a force derived from the magnetic field.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: June 2, 1998
    Inventors: Hans Foerster, Klaus Zick
  • Refrigeration method and apparatus
    Patent number: 5699672
    Abstract: The invention relates to a novel refrigeration method and apparatus in which air is used as coolant and primary refrigerant. The air is subjected to substantially isothermal compression in a water-injected screw-type compressor, cooling in first and second scrubber columns operated by separate refrigerant circuits, and subsequent adiabatic substantially isentropic expansion in a high-speed turbine. Heat exchangers may be provided for the removal of residual coldness from the expanded air and for preheating the air fed to the compressor.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: December 23, 1997
    Assignee: Hans Foerster
    Inventors: Hans Foerster, Wolfgang Leser
  • Heat transmitting apparatus
    Patent number: 5690169
    Abstract: The invention relates to an apparatus for exchanging heat between a small volumetric flow liquid medium and a large volumetric gaseous medium and provides for a plurality of radially disposed and interconnected concentric annular flow channels for the gaseous medium and a plurality of pipes extending axially through said annular flow channels providing flow passages for the liquid medium, said annular flow channels being preferably formed by successive convolutions of a heat insulating web.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: November 25, 1997
    Inventor: Hans Foerster
  • Method of separating organic vapors from gaseous media
    Patent number: 5685171
    Abstract: A method of separating from gaseous media, such as air or technical gases, organic vapors by substantially isothermally raising the pressure of the media and subjecting them to cooling in a cold scrubber receiving its operating low temperature from circulating first and second flows of refrigerants of moderate and significant refrigeration parameters and provided by resulting condensates.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: November 11, 1997
    Inventor: Hans Foerster
  • Method for purifying water of organic compounds not readily biodegradable
    Patent number: 3998732
    Abstract: The waste water of a sulfite pulp mill containing lignin and lignin derivves which are not bio-degradable is purified by contact with a fixed bed of granular, porous .gamma.-alumina having a particle size of 0.5-10 mm and a specific surface area of at least 140 m.sup.2 /g.
    Type: Grant
    Filed: October 16, 1975
    Date of Patent: December 21, 1976
    Assignee: Feldmuhle Anlagen- und Produktionsgesellschaft mit beschrankter Haftung
    Inventors: Hermann Solbach, Hans Foerster