Patents by Inventor Wilfried Dunnwald

Wilfried Dunnwald 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: 20240083688
    Abstract: A device for guiding a conveyor belt, having a guide unit with an outer and an inner hollow-cylindrical body, the inner hollow-cylindrical body having a first central axis and being arranged in the outer hollow-cylindrical body, which has a second central axis, and both hollow-cylindrical bodies each have a central axis, with at least one bearing for rotatably mounting the outer hollow-cylindrical body on the inner hollow-cylindrical body and with an articulation body designed for mounting the inner hollow-cylindrical body on a central axle, wherein the articulation body is further designed to allow a horizontal and/or vertical change in angle of the first and/or second central axis relative to a central axis of the central axle.
    Type: Application
    Filed: March 24, 2022
    Publication date: March 14, 2024
    Inventors: Wilfried Dünnwald, Michael Prenner, Thorsten Koth
  • Patent number: 10252865
    Abstract: A device for stripping material from a conveyor belt conveyor. The device includes a stripping body which can be pulled against the conveyor belt by means of a carrying element, a fastening device, and a tensioning device for the carrying element. In an installed state the carrying element is connected to the fastening device at one of its end and is connected to the tensioning device at its other end. The tensioning device has a spring, a stop for supporting the spring and a traction rod. The traction rod is connected to the carrying element. The spring is arranged in a receptacle associated with one or more adjusting means defining a through opening as a passage for the traction rod. The receptacle or the respective adjusting means defines a reference point for setting a variable tensioning force which corresponds to a desired tensile force dependent upon said angle.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: April 9, 2019
    Assignee: ScrapeTec GmbH
    Inventor: Wilfried Dünnwald
  • Patent number: 9718621
    Abstract: A sealing device for sealing the side regions of a conveyor belt having a sequence of sealing elements being arranged on either side of the longitudinal axis of the conveyor belt. The sealing elements are spaced apart and rest on the surface of the conveyor belt in a resilient manner, the individual sealing elements being arranged at an angle to the longitudinal axis of the conveyor belt and pointing in the direction of movement of the conveyor belt by their inner end. The sealing elements consist of strip-like guide ledges.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: August 1, 2017
    Assignee: ScrapeTec GmbH
    Inventor: Wilfried Dunnwald
  • Patent number: 9617081
    Abstract: An apparatus for stripping off material from a conveying belt of a belt conveyor in the region of the curve of a discharge drum, beneath the discharge point of the belt conveyor includes a plurality of stripping members arranged in a row and are carried by at least two elongate flexible carrying elements spaced apart from one another. At least one of the stripping members includes a first stripping element and a second stripping element and is additionally provided with a lifting mechanism which causes the first stripping element to be lifted from the conveying belt when the first stripping element is moved in a direction of travel of the conveying belt. The first stripping element is mounted on the stripping member so as to be movable relative to the lifting mechanism. The lifting mechanism may be in the form of an articulated lever mechanism or spring lever mechanism.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: April 11, 2017
    Assignee: ScrapeTec GmbH
    Inventor: Wilfried Dunnwald
  • Publication number: 20170057753
    Abstract: A device for stripping material from a conveyor belt conveyor. The device includes a stripping body which can be pulled against the conveyor belt by means of a carrying element, a fastening device, and a tensioning device for the carrying element. In an installed state the carrying element is connected to the fastening device at one of its end and is connected to the tensioning device at its other end. The tensioning device has a spring, a stop for supporting the spring and a traction rod. The traction rod is connected to the carrying element. The spring is arranged in a receptacle associated with one or more adjusting means defining a through opening as a passage for the traction rod. The receptacle or the respective adjusting means defines a reference point for setting a variable tensioning force which corresponds to a desired tensile force dependent upon said angle.
    Type: Application
    Filed: August 29, 2016
    Publication date: March 2, 2017
    Inventor: Wilfried Dünnwald
  • Publication number: 20160311626
    Abstract: An apparatus for stripping off material from a conveying belt of a belt conveyor in the region of the curve of a discharge drum, beneath the discharge point of the belt conveyor includes a plurality of stripping members arranged in a row and are carried by at least two elongate flexible carrying elements spaced apart from one another. At least one of the stripping members includes a first stripping element and a second stripping element and is additionally provided with a lifting mechanism which causes the first stripping element to be lifted from the conveying belt when the first stripping element is moved in a direction of travel of the conveying belt. The first stripping element is mounted on the stripping member so as to be movable relative to the lifting mechanism. The lifting mechanism may be in the form of an articulated lever mechanism or spring lever mechanism.
    Type: Application
    Filed: December 11, 2014
    Publication date: October 27, 2016
    Applicant: SCRAPE TEC GMBH
    Inventor: Wilfried Dunnwald
  • Publication number: 20160137423
    Abstract: A sealing device for sealing the side regions of a conveyor belt, having a sequence of sealing elements being arranged on either side of the longitudinal axis of the conveyor belt. The sealing elements are spaced apart and rest on the surface of the conveyor belt in a resilient manner, the individual sealing elements being arranged at an angle to the longitudinal axis of the conveyor belt and pointing in the direction of movement of the conveyor belt by their inner end. The sealing elements consist of strip-like guide ledges.
    Type: Application
    Filed: June 20, 2014
    Publication date: May 19, 2016
    Applicant: Scrape Tec GmbH
    Inventor: Wilfried Dunnwald
  • Patent number: 8978876
    Abstract: An arrangement for stripping material from the lower run of the conveyor belt includes scrapers divided into groups, arranged over the width of the conveyor belt and lying resiliently elastically against the underside of the lower run. The scrapers are arranged obliquely to the direction of travel of the lower run. The scrapers of a first group are oriented angled relative to the scrapers of an adjacent second group. The arrangement provides for each scraper to be supported at least indirectly on the supporting frame of the belt conveyor via at least two wound leg springs. Each respective leg spring is connected by its upper end to a front or rear end portion of the scraper, and is connected rotatably by its lower end to a transverse strut of a supporting frame.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: March 17, 2015
    Inventor: Wilfried Dünnwald
  • Patent number: 8528724
    Abstract: A device for stripping material from a conveyor belt of a belt conveyor in the area of a curve of a discharge drum below a discharge location of the belt conveyor, comprising a stripping body provided with a carrying element through which the stripping body is pulled or pullable against the conveyor belt, wherein the stripping body is further provided with a lift-off element which is disposed in the stripping body and offset from the carrying element and supports the stripping body when the latter is displaced in the belt running direction. The stripping body may include a plurality of stripping elements which define stripping edges and which have improved wear resistance compared to a material of the stripping body, wherein the stripping elements are configured and/or arranged, so that the stripping edges of adjacent stripping elements overlap partially overlap.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: September 10, 2013
    Inventor: Wilfried Dunnwald
  • Publication number: 20120305367
    Abstract: An arrangement for stripping material from the lower run of the conveyor belt includes scrapers divided into groups, arranged over the width of the conveyor belt and lying resiliently elastically against the underside of the lower run. The scrapers are arranged obliquely to the direction of travel of the lower run. The scrapers of a first group are oriented angled relative to the scrapers of an adjacent second group. The arrangement provides for each scraper to be supported at least indirectly on the supporting frame of the belt conveyor via at least two wound leg springs. Each respective leg spring is connected by its upper end to a front or rear end portion of the scraper, and is connected rotatably by its lower end to a transverse strut of a supporting frame.
    Type: Application
    Filed: November 19, 2010
    Publication date: December 6, 2012
    Inventor: Wilfried Dünnwald
  • Publication number: 20110100782
    Abstract: A device for stripping material from a conveyor belt of a belt conveyor in the area of a curve of a discharge drum below a discharge location of the belt conveyor, comprising a stripping body provided with a carrying element through which the stripping body is pulled or pullable against the conveyor belt, wherein the stripping body is further provided with a lift-off element which is disposed in the stripping body and offset from the carrying element and supports the stripping body when the latter is displaced in the belt running direction. The stripping body may include a plurality of stripping elements which define stripping edges and which have improved wear resistance compared to a material of the stripping body, wherein the stripping elements are configured and/or arranged, so that the stripping edges of adjacent stripping elements overlap partially overlap.
    Type: Application
    Filed: April 2, 2009
    Publication date: May 5, 2011
    Inventor: Wilfried Dunnwald