Cutting by use of rotating axially moving tool – Tool or tool with support – Having stepped cutting edges
Reexamination Certificate
2011-05-17
2011-05-17
Howell, Daniel W (Department: 3726)
Cutting by use of rotating axially moving tool
Tool or tool with support
Having stepped cutting edges
C408S227000, C408S713000
Reexamination Certificate
active
07942616
ABSTRACT:
The present invention provides a new drilling tool useful in machining hydraulic port seals for fluid power ports. The drilling tool drills the port hole to size in a solid material for the minor thread diameter in combination with forming the port in a single operation. The drilling tool has a tool holder having a rotational axis, a first drilling insert having cutting surfaces on a first side and a mounting surface on a second side, at least one second drilling insert having a predetermined cutting surface portion and a mounting portion which is mounted on the holder at a location from the rotational axis of the holder. The at least one second drilling insert has first and second portions which engage and machine a work piece in a drilling operation to form a spot face and a seal form.
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Kraemer Rolf H.
Nuzzi Joseph P.
Allied Machine & Engineering Corp.
Hahn Loeser & Parks LLP
Howell Daniel W
Oldham, Esq. Scott M.
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