Metal deforming – By application of fluent medium – or energy field – With cutting
Reexamination Certificate
2006-02-28
2006-02-28
Tolan, Ed (Department: 3725)
Metal deforming
By application of fluent medium, or energy field
With cutting
C072S071000, C072S325000, C072S453010, C072S432000
Reexamination Certificate
active
07003995
ABSTRACT:
A hydrotapping power unit is disclosed that is operable to hold a hydrotapping tool in a home position adjacent a part while the latter is being hydroformed in a die cavity, to then advance the tool to pierce a hole in the hydroformed part while the part remains in the die cavity and under pressure and then continue to advance the tool to inwardly extrude the part about the hole, to then further advance while also rotating the tool at a feed rate equal to the thread pitch of the tool to thereby form a thread in the pierced hole, and finally retract while also rotating the tool but in the reverse direction and at the same feed rate to release the tool from the threaded hole. The power unit for performing these operations includes a linearly moveable shaft for holding the tool, a powered device for rotating the shaft, another powered device connected to the shaft by a lead screw connection having a thread pitch equal to that of the tool, and a third powered device that is adapted to intercept and prevent shock loading on the tool from the piercing operation and thereby on the shaft from reaching the lead screw connection.
REFERENCES:
patent: 3302493 (1967-02-01), Hulslander et al.
patent: 3812698 (1974-05-01), Stock
patent: 3837121 (1974-09-01), Schimer
patent: 4414835 (1983-11-01), Larikka
patent: 4534682 (1985-08-01), Carlson
patent: 5398533 (1995-03-01), Shimanovski et al.
patent: 5666840 (1997-09-01), Shah et al.
patent: 6073708 (2000-06-01), Brown et al.
patent: 6427508 (2002-08-01), Lehto et al.
patent: 6915672 (2005-07-01), Ghiran et al.
U.S. Appl. No. 10/690,100, filed Oct. 21, 2003.
Ghiran Mircea M.
Jensen David R.
Larsen Paul D.
Mellas Spyros P.
General Motors Corporation
Hargitt Laura C.
Tolan Ed
LandOfFree
Hydrotapping power unit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydrotapping power unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrotapping power unit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3650666