Patents by Inventor Clive Tunna

Clive Tunna 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: 20220047749
    Abstract: A food processing and/or packaging device comprises at least one food chamber. Via a conduit system, the at least one food chamber is connected to a vacuum pump for generating vacuum in the at least one food chamber. For sterilizing the conduit system and/or the food chamber, a sterilization device is provided. The sterilization device comprises e.g. spray nozzles for introducing cleaning liquid into the conduit system. The cleaning liquid is separated by a liquid separator arranged upstream of the vacuum pump in flow direction.
    Type: Application
    Filed: October 10, 2017
    Publication date: February 17, 2022
    Inventors: Peter Birch, Clive Tunna, John Mara, Hans-Jürgen Blum
  • Patent number: 10851783
    Abstract: A dry vacuum pump, comprising a pump housing, which forms a plurality of suction chambers, wherein rotor elements are arranged in the suction chambers, in order to convey a pump medium from a high-vacuum-side inlet to an outlet. At least one rotor element is arranged in each suction chamber. The rotor elements are connected to a rotor shaft. The rotor shaft is supported by bearings, wherein a high-vacuum-side bearing is arranged in a cut-out. A sealing device is arranged between the high-vacuum-side bearing and at least one suction chamber adjacent to the high-vacuum-side bearing. The cut-out is connected, by means of a first channel, to a region of the dry vacuum pump in which there is a higher pressure than in at least one suction chamber adjacent to the high-vacuum-side bearing.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: December 1, 2020
    Assignee: LEYBOLD GMBH
    Inventors: Peter Birch, Robert Jenkins, Clive Tunna
  • Publication number: 20180340535
    Abstract: A dry vacuum pump, comprising a pump housing, which forms a plurality of suction chambers, wherein rotor elements are arranged in the suction chambers, in order to convey a pump medium from a high-vacuum-side inlet to an outlet. At least one rotor element is arranged in each suction chamber. The rotor elements are connected to a rotor shaft. The rotor shaft is supported by bearings, wherein a high-vacuum-side bearing is arranged in a cut-out. A sealing device is arranged between the high-vacuum-side bearing and at least one suction chamber adjacent to the high-vacuum-side bearing. The cut-out is connected, by means of a first channel, to a region of the dry vacuum pump in which there is a higher pressure than in at least one suction chamber adjacent to the high-vacuum-side bearing.
    Type: Application
    Filed: October 31, 2016
    Publication date: November 29, 2018
    Inventors: Peter BIRCH, Robert JENKINS, Clive TUNNA
  • Patent number: 9476423
    Abstract: A Roots pump comprises a plurality of multi-toothed rotary pumps, each forming a pump stage, and connection channels connecting respective adjacent pump stages. The invention provides that the connection channels are arranged in partitioning walls separating the adjacent pump stages.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: October 25, 2016
    Assignee: OERLIKON LEYBOLD VACCUM GMBH
    Inventors: Peter Birch, Thomas Dreifert, Robert Jenkins, Clive Tunna
  • Publication number: 20140205483
    Abstract: A Roots pump comprises a plurality of multi-toothed rotary pumps, each forming a pump stage, and connection channels connecting respective adjacent pump stages. The invention provides that the connection channels are arranged in partitioning walls separating the adjacent pump stages.
    Type: Application
    Filed: August 7, 2012
    Publication date: July 24, 2014
    Inventors: Peter Birch, Thomas Dreifert, Robert Jenkins, Clive Tunna
  • Publication number: 20070183909
    Abstract: A method of inhibiting combustion within a vacuum pump is provided. The method steps include monitoring and composition of a fluid within the pump and supplying purge gas to the pump to inhibit the onset of a combustion of the fluid. There is also provided a pumping arrangement comprising a vacuum pump (1) together with means (8) for supplying purge gas to the pump. Sensor means (21a, 21b, 21c) are provided for outputting a signal indicative of the onset of a combustion condition within the pump. Control means (22) receive the signal and, in turn, actuate the supply means (9) dependant on the signal received.
    Type: Application
    Filed: June 13, 2005
    Publication date: August 9, 2007
    Inventors: Roland Gregor Paul Kusay, Clive Tunna