Patents by Inventor Leonard A. Loesch

Leonard A. Loesch 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).

  • Method for processing up to 100% RAP in an asphalt plant
    Patent number: 11828028
    Abstract: A method for producing asphalt using a high percentage of RAP (recycled asphalt pavement) in the total aggregate raw material. A counterflow rotary drum dryer is used to dry the raw material. The extent of the burner flame in the dryer is limited such that the RAP does not come into direct contact with the flame. The hot gases leaving the dryer pass to a wet scrubber.
    Type: Grant
    Filed: December 22, 2018
    Date of Patent: November 28, 2023
    Assignee: Stansteel Corporation
    Inventors: Leonard A. Loesch, Steven W. Elam
  • Method and Device for Drying Fine Particulate Material Such As Fracking Sand
    Publication number: 20220282916
    Abstract: A device and method for drying fine particulate. A parallel flow rotary drum dryer is used to dry the particulate material. There is a combustion chamber for the burner, located upstream of the dryer inlet, and the burner flame is limited to the combustion chamber so the fine particulate material does not come into direct contact with the burner flame. The output from the dryer passes through a knock-out box including a baffle system with a plurality of narrow gaps to create a pressure drop to slow down the gas flow and enable the entrained fine mesh dry particulate to drop out through a bottom outlet before the effluent gas is sent to the dust collection/air filtration system.
    Type: Application
    Filed: May 27, 2022
    Publication date: September 8, 2022
    Applicant: Industrial Process Systems, Inc.
    Inventors: Leonard A. Loesch, Oscar Mathis
  • Method and device for drying fine particulate material such as fracking sand
    Patent number: 11371777
    Abstract: A device and method for drying fine particulate. A parallel flow rotary drum dryer is used to dry the particulate material. There is a combustion chamber for the burner, located upstream of the dryer inlet, and the burner flame is limited to the combustion chamber so the fine particulate material does not come into direct contact with the burner flame. The output from the dryer passes through a knock-out box including a baffle system with a plurality of narrow gaps to create a pressure drop to slow down the gas flow and enable the entrained fine mesh dry particulate to drop out through a bottom outlet before the effluent gas is sent to the dust collection/air filtration system.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: June 28, 2022
    Assignee: Industrial Process Systems, Inc.
    Inventors: Leonard A Loesch, Oscar Mathis, III
  • Method for operating an asphalt plant
    Patent number: 9963837
    Abstract: A method for operating an asphalt plant includes using sensors to quickly pinpoint a problem area and to determine the best course of action to maintain quality production with minimum wasted material and minimum plant downtime.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: May 8, 2018
    Assignee: Industrial Process Systems, Inc.
    Inventors: Gregg A Gilpin, Leonard A Loesch
  • Method for operating an asphalt plant for both continuous and batch operation
    Patent number: 5607231
    Abstract: A combination continuous/batch asphalt plant includes mechanisms and controls which permit it to be hot-stopped when operating in the continuous mode.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: March 4, 1997
    Assignee: GenTec Equipment Company
    Inventor: Leonard A. Loesch
  • Asphalt plant for both continuous and batch operation
    Patent number: 5556197
    Abstract: A combination continuous/batch asphalt plant includes mechanisms and controls which permit it to be hot-stopped when operating in the continuous mode.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: September 17, 1996
    Assignee: GenTec Equipment Company
    Inventor: Leonard A. Loesch