Patents Assigned to Technofast Industries Pty. Ltd.
  • Publication number: 20210322995
    Abstract: A hydraulic mantle system for a gyratory rock crusher enables the safe, quick and efficient replacement of a worn or deformed mantle. The system includes a main shaft, an annular nut, an annular hydraulic piston and an annular mantle. The main shaft has a flange and external threads adjacent the flange. The annular nut body has side surfaces and internal threads that are threaded onto the external threads of the main shaft. The annular hydraulic piston has side surfaces that slidingly engage the side surfaces of the annular nut body. The annular mantle has an upper neck portion and a lower edge portion. The main shaft extends extending through the upper neck portion. The upper neck portion of the annular mantle is compressed between the flange of the main shaft and the annular hydraulic piston.
    Type: Application
    Filed: September 19, 2019
    Publication date: October 21, 2021
    Applicant: Technofast Industries Pty. Ltd.
    Inventors: John Wentworth Bucknell, Robert Wentworth Bucknell
  • Patent number: 10801625
    Abstract: A high-pressure sealing ring for hydraulic assemblies has a substantially—“L”-shaped body with a leg and foot, where an external heel-portion is designed to provide a “rolling” line of sealing contact with the seat in the cylinder or piston in which it is seated.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: October 13, 2020
    Assignee: TECHNOFAST INDUSTRIES PTY LTD
    Inventor: John Wentworth Bucknell
  • Patent number: 10662989
    Abstract: A high capacity radial-fit coupling bolt (or “expanding sleeve bolt”) has a pair of tapered sleeves about a shank of a bolt to which can be applied a tensioning load. An extrudable ring, or a compression ring, is interposed between a head nut or head flange at one end of the shank, and one end of an inner sleeve. A tensioning load is applied to the shank, the inner sleeve causing the outer sleeve to expand diametrically. At a preset load limit, the extrudable ring is extruded through at least one bore in a drive piston between the head nut and the extrudable ring, to allow shank to move relative to the inner sleeve until the tensioning load is fully applied. Alternatively, a drive member is provided between the head nut or head flange and the compression ring, and at a preset limit, the compression ring allows the shank to move relative to inner sleeve until the tensioning load is fully applied. The preset limit will typically correspond to the force required to fully expand the outer sleeve.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: May 26, 2020
    Assignee: TECHNOFAST INDUSTRIES PTY LTD
    Inventor: John Wentworth Bucknell
  • Patent number: 9879706
    Abstract: A high capacity radial-fit coupling bolt (or “expanding sleeve bolt”) has a pair of tapered sleeves about a shank of a bolt to which can be applied a tensioning load. An extrudable ring, or a compression ring, is interposed between a head nut or head flange at one end of the shank, and one end of an inner sleeve. A tensioning load is applied to the shank, the inner sleeve causing the outer sleeve to expand diametrically. At a preset load limit, the extrudable ring is extruded through at least one bore in a drive piston between the head nut and the extrudable ring, to allow shank to move relative to the inner sleeve until the tensioning load is fully applied. Alternatively, a drive member is provided between the head nut or head flange and the compression ring, and at a preset limit, the compression ring allows the shank to move relative to inner sleeve until the tensioning load is fully applied. The preset limit will typically correspond to the force required to fully expand the outer sleeve.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: January 30, 2018
    Assignee: Technofast Industries Pty Ltd
    Inventor: John Wentworth Bucknell
  • Patent number: 8328491
    Abstract: An axially expanding spacer (10) has respective first and second spacer rings (11,12) with complementary helical ramped faces (16,17) and abutment faces (18,19). By relative rotation of the spacer rings (11,12), the height of the spacer (10), between annular faces (14,15) can be expanded or contracted. Compression springs (20) between the abutment faces (18,19) urge the spacer (10) to its “expanded” configuration.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: December 11, 2012
    Assignee: Technofast Industries Pty. Ltd.
    Inventors: John Wentworth Bucknell, Robert Wentworth Bucknell
  • Publication number: 20100135748
    Abstract: An axially expanding spacer (10) has respective first and second spacer rings (11,12) with complementary helical ramped faces (16,17) and abutment faces (18,19). By relative rotation of the spacer rings (11,12), the height of the spacer (10), between annular faces (14,15) can be expanded or contracted. Compression springs (20) between the abutment faces (18,19) urge the spacer (10) to its “expanded” configuration.
    Type: Application
    Filed: October 11, 2007
    Publication date: June 3, 2010
    Applicant: TECHNOFAST INDUSTRIES PTY LTD.
    Inventors: John Wentworth Bucknell, Robert Wentworth Bucknell