Turning – Severing or cut-off
Reexamination Certificate
2005-06-21
2009-10-27
Fridie, Willmon (Department: 3724)
Turning
Severing or cut-off
C082S113000, C407S033000, C407S066000, C407S067000
Reexamination Certificate
active
07607374
ABSTRACT:
Tube ends such as those of boiler tube banks, are prepared utilizing any of various combinations of processes which include a step of micro-diameter tube film removal from a portion of a tube end, including an area below a beveled segment, or segment to be beveled. The micro-diameter film removal step provides the tube with an exposed, clean metal surface which is conducive to a subsequent welding or bonding operation performed on the tube. Preferably, the process is performed with a tube milling tool having interchangeable milling or cutting heads. A specialized milling head is also disclosed and, in one embodiment, is at least used to perform the micro-diameter tube film removal step. Advantageously, the tube film removal milling head also removes a weld overlay on one or both sides of a tube in one embodiment. The tube film removal milling head includes an attached blade having a planar face configuration which enables tube film removal.
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Document No. ES 0002—Babcock Engineering Drawing of Babcock Head, No. 5259 68, 1 page, “alleged” date Aug. 30, 1996, unknown if publicly available.
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Document Nos. ES 0020-0023—Portable Pneumatic Pipe Bevelling Machines, by G.B.C. Pipework Technologies, Inc., Houston, Texas, 4 pages cover page, p. 8, p. 26 and an additional unnumbered page, stated to be Edition 1993.
Document No. ES 0066—Babcock Engineering Drawing No. 1389620, 1 page, “alleged” date Aug. 19, 1987, unknown if publicly available.
Document Nos. ES 0117-0118—Specification sheets for standard and custom blades, Esco Tool, Medfield, MA, 2 pgs., “alleged” date Nov. 1, 1995.
Document No. ES 0225—Babcock Engineering Drawing No. 1328978, 1 page, “alleged” date Feb. 20, 1981, unknown if publicly available.
Fridie Willmon
H&S Tool, Inc.
Hudak, Shunk & Farine Co. LPA
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