초록 ▼

In a device for confining a pressurized working fluid within a tube to be expanded radially, a support to be positioned axially within the tube and at least one sealing member encircling the support. The sealing member is deformable so that it expands radially against the inside of the tube upon axi

In a device for confining a pressurized working fluid within a tube to be expanded radially, a support to be positioned axially within the tube and at least one sealing member encircling the support. The sealing member is deformable so that it expands radially against the inside of the tube upon axial compression by the force of a pressurized working fluid introduced into the tube. A centering means is provided that prevents angular movement of the sealing member relative to the longitudinal axis of the tube, thereby forcing the sealing member to assume a radially centered position within the tube as it expands.

대표청구항 ▼

A swaging apparatus for expanding a tube radially comprising: a mandrel body for axial insertion in said tube to introduce a pressurized working fluid into said tube to cause the radial expansion of said tube; a deformable sealing member encircling said mandrel body to be compressed axially and expa

A swaging apparatus for expanding a tube radially comprising: a mandrel body for axial insertion in said tube to introduce a pressurized working fluid into said tube to cause the radial expansion of said tube; a deformable sealing member encircling said mandrel body to be compressed axially and expanded radially upon the application of pressure thereto by said working fluid; and centering means for preventing angular movement of said sealing member relative to the longitudinal axis of said tube as said tube expands radially, thereby forcing said sealing member to assume a radially centered position within said tube to define a substantially uniform circumferential extrusion gap adjacent said sealing member; said centering means comprising a sleeve that is axially slidable on said mandrel body, said sleeve having a flange that extends radially outwardly and said sealing member being confined axially between said flange and a portion of said mandrel.