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US 4,307,593 AGranted
Apparatus for forming collars around openings in tubes or plates
AssigneeT-Drill Oy
InventorWilliam H. Riggs
Life of this patent
Estimating the term…
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AssigneeT-Drill Oy
InventorWilliam H. Riggs
Estimating the term…
Collar forming apparatus for forming an upstanding flange around an existing hole in a tube or plate comprising a pair of forming members mounted on and movable axially and radially with respect to the forming head between retracted positions and extending collar forming positions displaced axially and radially away from the retracted positions wherein at least portions of the forming members underlie the edge of the wall surrounding the opening. The forming members are moved to their collar forming positions by a wedge member that is movable axially with respect to the forming head to a predetermined axial position. Abutment means in the form of cooperating surface portions on the wedge member and the formation means acts between the wedge member and the formation means to impart radial and axial forces on the formation means when the wedge member is moved to its predetermined axial position to move the forming members to their collar forming positions. Means is provided for maintaining the wedge member in its predetermined axial position to provide axial and radial support for the forming members as the material is worked in forming a collar.
Apparatus for forming a collar around an opening in a wall comprising a forming head, means for moving said forming head back and forth along an axis, formation means adapted to engage portions of said wall adjacent to said opening to form said collar, means mounting said formation means on said forming head for movement axially and radially with respect to said axis between a retracted position and an extended collar forming position displaced axially and radially outwardly from said retracted position, wedge means movable axially with respect to said forming head and operable when moved to a predetermined axial position to move said formation means to said collar forming position wherein at least portions of said formation means underlie the edge of said wall adjacent said opening, abutment means acting between said wedge means and said formation means to impart axially directed and radially directed forces on said formation means in response to said axial movement of said wedge means to said predetermined axial position to move said formation means to said extended collar forming positions.
Apparatus for forming a collar around an opening in a wall comprising a forming head movable reciprocally along an axis, formation means adapted to engage portions of said wall adjacent to said opening to form said collar, means mounting said formation means on said forming head for movement radially of said axis between a retracted position and an extended collar forming position displaced radially from said retracted position, wedge means movable reciprocally along said axis and operable to move said formation means to said collar forming position, abutment means acting between said wedge means and said formation means to impart radially directed forces on said formation means in response to axial movement of said wedge means to a predetermined axial position to move said formation means to said collar forming position, and means maintaining said wedge means in said predetermined axial position as said collar is formed to provide radial support for said formation means.
Dependencies are inferred from the claim text.