Patents by Inventor Alister McAndrew

Alister McAndrew 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).

  • Patent number: 7325670
    Abstract: The present invention relates to a conveyor pan (110) for underground face or gate conveyors, with a pair of side parts (101) comprising cast parts which include cast vertical arms (113) extending over the height of the bottom run (106) and the top run (107), a lower cast flange arm (111) extending outwards to the rear, a cast foot flange (112) extending inwards onto whose lower side a base plate (104) is welded which closes the bottom run to the bottom, as well as on the end faces cast accepting elements (114) for the means of joining conveyor pans, and with a conveyor pan base (105) preferably comprising a rolled sheet. This has tongue like segments (109) on both long sides, which engage in cut-out slots (135) in the vertical arms (113) of the side parts (101) and are welded to them on the outer of the side parts (101).
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: February 5, 2008
    Assignee: DBT GmbH
    Inventors: Dirk Vorsteher, Gerhard Merten, Frank Fischer, Jorg Wirtz, Siegfried Schmidt, Martin Broszat, Alfred Hefferan, John Cobley, Alister McAndrew, Olaf Losbrodt
  • Patent number: 7032743
    Abstract: The invention relates to a conveyor pan (150) for underground face and gate conveyors, with a bottom run (102) and a top run (103) for the guidance of a scraper of a scraper chain, with a frame work construction (101) which has side walls (110) comprising cast parts firmly joined to each other, with an intermediate flange (111) and an upper moulded flange lug (112) extending outwards from it and a lower moulded flange arm (113) as well as a moulded foot flange (120) extending inwards and bordering the bottom run partly to the side.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: April 25, 2006
    Assignee: DBT GmbH
    Inventors: Dirk Vorsteher, Gerhard Merten, Frank Fischer, Jorg Wirtz, Siefgried Schmidt, Martin Broszat, Alfred Hefferan, John Cobley, Alister McAndrew, Olaf Losbrodt
  • Patent number: 6966429
    Abstract: The conveyor pan according to the present invention has a framework construction (1) having the bottom run (2) and an interchangeably constructed exchangeable tray (4) forming the top run (3), which can be lifted out, vertically supported on the framework (1). The framework construction (1) of the conveyor pan (50) has two roiled U-profiles forming the side walls of the conveyor pan, each of which has a vertically extending intermediate arm (11), an upper, outwards facing flange arm (12) and, lower outwards facing flange arm (13). The identically constructed but mirror imaged iron U-profiles (10), i.e.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: November 22, 2005
    Assignee: DBT GmbH
    Inventors: Dirk Vorsteher, Gerhard Merten, Frank Fischer, Jorg Wirtz, Siefgried Schmidt, Martin Broszat, Alfred Hefferan, John Cobley, Alister McAndrew, Olaf Losbrodt
  • Patent number: 6896121
    Abstract: The present invention relates to a conveyor pan (50) for underground face and gate conveyors, with a bottom pan (2) and a top pan (3) for the guidance of scrapers of a scrapper chain, the conveyor pan (50) having a welded frame construction (1) comprising side walls firmly fixed to one another with a conveyor base (8) and a means (60) of joining the conveyor pans. In accordance with the present invention the side walls comprise mirror image single part rolled profiles (10) with a constant profile form over the length of the conveyor pan (50), whereby the rolled profile (10) includes a base arm (11) and a top arm (12) both angled outwards as well as an extended intermediate arm (13) joining these, which is provided with an offset (14), onto which intermediate arm (13) on its inside at least one step (17) is formed for the support and welding on of at least one of the intermediate plates (40A) stiffening the frame construction (1).
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: May 24, 2005
    Assignee: DBT GmbH
    Inventors: Dirk Vorsteher, Gerhard Merten, Frank Fischer, Jorg Wirtz, Siefgried Schmidt, Martin Broszat, Alfred Hefferan, John Cobley, Alister McAndrew, Olaf Losbrodt
  • Publication number: 20040026216
    Abstract: The present invention relates to a conveyor pan (110) for underground face or gate conveyors, with a pair of side parts (101) comprising cast parts which include cast vertical arms (113) extending over the height of the bottom run (106) and the top run (107), a lower cast flange arm (111) extending outwards to the rear, a cast foot flange (112) extending inwards onto whose lower side a base plate (104) is welded which closes the bottom run to the bottom, as well as on the end faces cast accepting elements (114) for the means of joining conveyor pans, and with a conveyor pan base (105) preferably comprising a rolled sheet. This has tongue like segments (109) on both long sides, which engage in cut-out slots (135) in the vertical arms (113) of the side parts (101) and are welded to them on the outer of the side parts (101).
    Type: Application
    Filed: August 4, 2003
    Publication date: February 12, 2004
    Inventors: Dirk Vorsteher, Gerhard Merten, Frank Fischer, Jorg Wirtz, Siegfried Schmidt, Martin Broszat, Alfred Hefferan, John Cobley, Alister McAndrew, Olaf Losbrodt
  • Publication number: 20030213677
    Abstract: The present invention relates to a conveyor pan (50) for underground face and gate conveyors, with a bottom pan (2) and a top pan (3) for the guidance of scrapers of a scrapper chain, the conveyor pan (50) having a welded frame construction (1) comprising side walls firmly fixed to one another with a conveyor base (8) and a means (60) of joining the conveyor pans. In accordance with the present invention the side walls comprise mirror image single part rolled profiles (10) with a constant profile form over the length of the conveyor pan (50), whereby the rolled profile (10) includes a base arm (11) and a top arm (12) both angled outwards as well as an extended intermediate arm (13) joining these, which is provided with an offset (14), onto which intermediate arm (13) on its inside at least one step (17) is formed for the support and welding on of at least one of the intermediate plates (40A) stiffening the frame construction (1).
    Type: Application
    Filed: May 15, 2003
    Publication date: November 20, 2003
    Inventors: Dirk Vorsteher, Gerhard Merten, Frank Fischer, Jorg Wirtz, Siefgried Schmidt, Martin Broszat, Alfred Hefferan, John Cobley, Alister McAndrew, Olaf Losbrodt
  • Publication number: 20030213676
    Abstract: The invention relates to a conveyor pan (150) for underground face and gate conveyors, with a bottom run (102) and a top run (103) for the guidance of a scraper of a scraper chain, with a frame work construction (101) which has side walls (110) comprising cast parts firmly joined to each other, with an intermediate flange (111) and an upper moulded flange lug (112) extending outwards from it and a lower moulded flange arm (113) as well as a moulded foot flange (120) extending inwards and bordering the bottom run partly to the side.
    Type: Application
    Filed: May 15, 2003
    Publication date: November 20, 2003
    Inventors: Dirk Vorsteher, Gerhard Merten, Frank Fischer, Jorg Wirtz, Siegfried Schmidt, Martin Broszat, Alfred Hefferan, John Cobley, Alister McAndrew, Olaf Losbrodt
  • Publication number: 20030213678
    Abstract: The conveyor pan according to the present invention has a framework construction (1) having the bottom run (2) and an interchangeably constructed exchangeable tray (4) forming the top run (3), which can be lifted out, vertically supported on the framework (1) the framework construction (1) of the conveyor pan (50) has two roiled U-profiles forming the side walls of the conveyor pan, each of which has a vertically extending intermediate arm (11), an upper, outwards facing flange arm (12) and, lower outwards facing flange arm (13). The identically constructed but mirror imaged iron U-profiles (10), i.e.
    Type: Application
    Filed: May 15, 2003
    Publication date: November 20, 2003
    Inventors: Dirk Vorsteher, Gerhard Merten, Frank Fischer, Jorg Wirtz, Siefgried Schmidt, Martin Broszat, Alfred Hefferan, John Cobley, Alister McAndrew, Olaf Losbrodt