Patents by Inventor Gerhard Kral

Gerhard Kral 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).

  • Expulsion Device Actuated by a Pressure Medium
    Publication number: 20080283569
    Abstract: The invention relates to an expulsion device which is actuated by a pressure medium and which is used to expel objects or liquid materials from a reservoir by means of a drive piston which is impinged upon by a pressure medium, comprising a pressure medium container which is exchangeable via a pressure connection device and which connected to a drive device, enabling the pressure medium to impinge upon the drive piston which is used to connect the pressure medium container (23) and a stationary pressure source.
    Type: Application
    Filed: October 11, 2005
    Publication date: November 20, 2008
    Inventor: Gerhard Kral
  • Expulsion device actuated by a pressure medium
    Patent number: 6845896
    Abstract: An expulsion device expels objects or liquid materials from a reservoir using a drive piston which is subjected to the action of a pressure medium. The expulsion device includes a pressure medium container that is exchangeable and connected to a device body. An actuation device enables the pressure medium to act on the drive piston which is thus displaced in a forward and a backward direction.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: January 25, 2005
    Assignee: PREBENA Wilfried Bornemann GmbH & Co. KG
    Inventor: Gerhard Kral
  • Expulsion device actuated by a pressure medium
    Publication number: 20030173393
    Abstract: The invention relates to an expulsion device (10) for expelling objects (58) or liquid materials from a reservoir (15) by means of a drive piston (20) which is subjected to the action of the pressure medium, comprising a pressure medium container (14) which is exchangeable and connected to a device body (11), enabling the pressure medium to act on the drive piston (20) which is thus displaced in a forwards and backwards direction.
    Type: Application
    Filed: February 26, 2003
    Publication date: September 18, 2003
    Inventor: Gerhard Kral