Patents by Inventor Thomas Wooh

Thomas Wooh 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).

  • Skimmer for square settling tanks
    Patent number: 4043920
    Abstract: In a continuously operating square settling tank, the provision of scum skimming devices wherein a pivotally mounted corner exploring skimmer member is swingable in a predetermined horizontal plane, while kept in contact with the peripheral scum baffle during rotation of the supporting rake structure. This skimmer member forms with the scum baffle a scum collecting pocket whereby when the thus collected scum is pushed up along the slope of a ramp, it is trapped and thereby contained on the ramp for delivery into a receiving box connected to the ramp.The scum collecting effectiveness of the skimmer member may be enhanced by the additional provision of a directional skimmer blade cooperatively so related to the swingable skimmer member, that floating scum material is thereby guided into said collecting pocket.
    Type: Grant
    Filed: August 25, 1976
    Date of Patent: August 23, 1977
    Assignee: Dorr-Oliver Incorporated
    Inventor: Thomas Wooh
  • Sedimentation tank with rotary yieldable rake arm structure
    Patent number: 4000075
    Abstract: Continuously operating sedimentation tank wherein a load yieldable composite rotary rake arm structure is constructed and arranged to conform to the compound slope of the tank bottom, while being dragged over the tank bottom by draft means connecting it to a driving arm spaced upwardly from the rake arm structure.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: December 28, 1976
    Assignee: Dorr-Oliver Incorporated
    Inventor: Thomas Wooh