Gear cutting – milling – or planing – Milling – Cutter spindle or spindle support
Reexamination Certificate
2005-12-27
2005-12-27
Ashley, Boyer D. (Department: 3722)
Gear cutting, milling, or planing
Milling
Cutter spindle or spindle support
C409S136000, C408S23900A
Reexamination Certificate
active
06979156
ABSTRACT:
A machine spindle includes a casing and a drawbar assembly disposed in the casing for clamping a tool in place. The drawbar assembly includes a front drawbar having a tool clamp, and a rear drawbar movable rearwardly under a spring force for pulling the front drawbar rearwardly to activate the clamp. A rearward force from the rear drawbar is transmitted to the front drawbar by a wedge arrangement that includes multiple pairs of wedges that have cooperative sliding surfaces that make surface contact (as opposed to line contact) with one another. The cooperative sliding surfaces are configured to provide an amplified rearward force against the front drawbar during a final stage of clamping.
REFERENCES:
patent: 4668137 (1987-05-01), Iwakura
patent: 4863324 (1989-09-01), Blessing
patent: 4915553 (1990-04-01), Lazarevic
patent: 5052866 (1991-10-01), Bauch et al.
patent: 5192061 (1993-03-01), Schaublin et al.
patent: 5251887 (1993-10-01), Arnold et al.
patent: 6722827 (2004-04-01), Anderson
patent: 4330399 (1995-03-01), None
Englund Kjell
Olsson Sören
Ashley Boyer D.
Ross Dana
Sandvik AB
LandOfFree
Machine spindle having a force-amplifier drawbar assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Machine spindle having a force-amplifier drawbar assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Machine spindle having a force-amplifier drawbar assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3520388