Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Reexamination Certificate
2007-08-07
2007-08-07
Jones, David (Department: 3725)
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
C072S061000, C072S062000, C029S421100
Reexamination Certificate
active
10496240
ABSTRACT:
A method and an apparatus for reshaping a tube having an initial outside diameter, an initial wall thickness, and an initial length to form a tube have a reshaped outside diameter, a reshaped length, and a reshaped wall thickness, wherein at least one of the reshaped outside diameter, the reshaped length, and the reshaped wall thickness is different than a respective one of the initial outside diameter, the initial wall thickness, and the initial length. The method includes mounting the tube between two axially displaceable pressure rams with the ends of the tube against respective rams; applying an internal hydraulic pressure to the tube; applying an axial mechanical pressure to the tube via the rams; and simultaneously and uniformly cold-working the tube over its entire length by adjusting the internal hydraulic pressure and the axial mechanical pressure as a function of the reshaped outside diameter, the reshaped wall thickness, and the reshaped length.
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Cohen Pontani Lieberman & Pavane LLP
Jones David
Wilhelm Schulz GmbH
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