Pipe expander
AssigneeW.E.B. Tooling Pty Ltd.
InventorsWarren E. Bryant, Terrence E. Stanley
Life of this patent
Estimating the term…
Abstract
A pipe expander head and pipe expander is disclosed which comprises a housing 30, in which a pin 50 is mounted. The pin 50 has a tapered end 54 and is provided with a plurality of teeth 60. The teeth 60 mesh with a gear assembly 62, 66 and 68 which in turn are coupled to a handle 72. Upon rotation of the handle 72 the gear assembly 62, 66 and 68 is rotated to drive the pin to expand an expander head. The expander head includes a plurality of segments 39, 41, 43, 45, 47 and 49 which are coupled together with a circular spring 96. The expander head segments each include annular stepped expanding portions 72, 74, 76 and 78 and the stepped portions are provided with recesses 80 for accommodating a work piece to be expanded.
Claims8
A pipe expander head, said pipe expander head having a plurality of segments, resilient coupling means for coupling the segments together, said segments being adapted to be forced radially outwardly with respect to one another in order to expand a work piece, said segments each having a plurality of stepped part-circular expanding portions which form annular expanding portions when the segments are coupled together, said annular expanding portions comprising a plurality of radial annular surfaces extending in a generally radial direction of said expander head and a plurality of adjacent axial annular surfaces extending in a generally axial direction so as to form a corresponding plurality of steps therewith, a plurality of annular recesses of preselected length extending in a generally axial direction between axial annular surfaces of adjacent annular expanding portions, each said recess extending from a radial annular surface of one said annular expanding portions and having a radially inner wall extending along its length so as to form a continuation of the axial annular surface of said one annular expanding portion so that the axial thickness of said expander head is reduced by an amount proportional to the sum of the lengths of the walls of each recess.
A pipe expander, said pipe expander having a plurality of segments, resilient coupling means for coupling the segments together, said segments being adapted to be forced radially outwardly with respect to one another in order to expand a work piece, said segments each having a plurality of stepped part-circular expanding portions which form annular expanding portions when the segments are coupled together, said annular expanding portions comprising a plurality of radial annular surfaces extending in a generally radial direction of said expander and a plurality of adjacent axial annular surfaces extending in a generally axial direction so as to form a corresponding plurality of steps therewith, a plurality of annular recesses of preselected length extending in a generally axial direction between the axial annular surfaces of adjacent annular expanding portions, each said recess extending from a radial annular surface of one said annular expanding portion and having a radially inner wall extending along its length so as to form a continuation of the axial annular surface of said one annular expanding portion so that the axial thickness of said expander is reduced by an amount proportional to the sum of the lengths of the walls of each recess, and means for driving said segments radially outwardly to perform an expanding operation.
Dependencies are inferred from the claim text.