Patents by Inventor Georg Wawra

Georg Wawra 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: 4668580
    Abstract: Process for the production of microcapsule dispersions according to the polyaddition process, wherein an inert organic liquid is continuously mixed under strong turbulence with a polyisocyanate, insoluble therein, this mixture is emulsified in an aqueous phase as dispersed phase and the emulsion formed is continuously reacted with a polyamine.
    Type: Grant
    Filed: June 3, 1985
    Date of Patent: May 26, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Dahm, Gert Jabs, Georg Wawra
  • Patent number: 4400147
    Abstract: Flushable rotary gear pumps for delivering fluidic material, such as liquid coating material, may quickly and thoroughly be flushed of material of one type in preparation for delivering material of another type. In one embodiment, a valve selectively establishes a bypass channel between an inlet to and an outlet from a pump, thereby to accommodate a relatively large volume flow of flushing media through the pump and supply and delivery lines therefor. In another embodiment, the valve is structured to monitor fluid pressure developed by the pump and to automatically control and limit the pressure to a maximum value should an overpressure condition develop. In yet other embodiments passages are provided internally of the pump for conveying flushing media to all exposed surfaces of the gears, gear shafts and pump body to flush the same of coating material, whereby the entirety of the pump may readily be cleansed. If desired, the various features may be combined in a single pump.
    Type: Grant
    Filed: March 25, 1981
    Date of Patent: August 23, 1983
    Assignees: Binks Manufacturing Company, Bayer Aktiengesellschaft
    Inventors: Carl M. Springer, Bernd O. Theis, Georg Wawra, Richard Juffa
  • Patent number: 4228815
    Abstract: The method is based on the fact that the particular components are conveyed through separate pipes into a mixing chamber. By measuring the transit time in at least one of the pipes the flowrate can be measured. The flow in the other pipes which is in a fixed ratio to the first flow is then adjusted automatically. For measuring the transit time a heat pulse is injected in at least one of the pipes and the transit time of the heat impulse is measured. The so-measured transit time is converted into an inversely proportional voltage and the flowrate in the other pipes is adjusted proportionally to this voltage. An apparatus is provided for practicing the method. The apparatus comprises flow measuring elements which are electrical connected to control devices which operate flow control devices in the pipes leading to the mixing chamber.
    Type: Grant
    Filed: January 11, 1978
    Date of Patent: October 21, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Richard Juffa, Georg Wawra, Walter Uerdingen
  • Patent number: 4228683
    Abstract: The instant invention provides a method for determining the streaming velocity of a streaming liquid by injecting a thermopulse into the liquid and measuring its transit time. The pulse is detected by its ascending flank at downstream points and by its ascending or descending flank at its point of injection. For short transit times, provision is made to eliminate the heat up time of the heating wire imparting the pulse from the transit time measurement. The liquid may stream continuously or discontinuously, and if the later, provision is made to delay measurement on initiation of flow until the flow pattern has stabilized. The time is determined by counting pulses from a pulse generator during the period the pulse is traveling between the point of injection and a detection point or between two detection points.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: October 21, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Richard Juffa, Georg Wawra, Walter Uerdingen