Turning – Lathe – Tool rest
Reexamination Certificate
2000-07-05
2002-10-22
Tsai, Henry (Department: 3722)
Turning
Lathe
Tool rest
C082S159000, C082S160000, C409S232000
Reexamination Certificate
active
06467381
ABSTRACT:
BACKGROUND OF INVENTION
A prior art coupling apparatus for attaching a tool holder to a machine spindle of a type widely used in the industry is depicted in FIG.
3
. As can be clearly seen from
FIG. 3
, there is a gap or spacing
20
of about ⅛ to ¼ inch between the free end
21
of machine spindle
22
and the integral collar
23
formed on the shank of the tool holder
24
. It has been found that this gap or spacing
20
is an area of weakened structural support, particularly when operating the machine at high speeds and when milling or grinding the harder materials. This contributes to misalignment of the tool, tending to provide rough and/or inaccurate work and to cause bending and wearing of the associated tool. Tool holders mounted on a machine spindle and forming a gap between the tool holder collar and the spindle are shown in U.S. Pat. No. 5,407,308. Also, U.S. Pat. Nos. 4,714,389 and 5,352,073 show tool holder apparatus including a means for affixing the tool holder to the spindle for eliminating the gap or spacing; however the tool holder shown in the latter two patents is complex, and the support collar shown therein is integral to the shank, and is not adjustable. As seen from
FIG. 1
, the present invention discloses tool holder apparatus having an adjustable support collar on the tool holder for eliminating the gap or spacing between the support collar and the end of the spindle thereby enabling the apparatus to be universally employed with varing types and sizes of spindles and tool holders; further the inventive apparatus can be retrofitted to existing equipment.
SUMMARY OF THE INVENTION
It is a primary purpose and feature of the present invention to provide a tool holder apparatus which is readily adjustable to provide a solid, stable support for an associated tool, and which adjustable tool holder apparatus eliminates the gap or spacing between the end of a machine spindle, and the support collar on the shank of the tool holder.
REFERENCES:
patent: 3649129 (1972-03-01), King, Jr.
patent: 3658435 (1972-04-01), Kubicek
patent: 3680436 (1972-08-01), Marsland
patent: 3699843 (1972-10-01), Sweeny
patent: 3734517 (1973-05-01), Benjamin
patent: 4519734 (1985-05-01), Mitchell et al.
patent: 4642005 (1987-02-01), Rondo et al.
patent: 4714389 (1987-12-01), Johne
patent: 4726721 (1988-02-01), Heel et al.
patent: 5167478 (1992-12-01), Ramunas
patent: 5352073 (1994-10-01), Roiche
patent: 5407308 (1995-04-01), Kitamora
patent: 5746298 (1998-05-01), Krivec et al.
patent: 5771762 (1998-06-01), Bissett
Frecska Laszlo
Hartford James T.
Aubel Leo J.
Tsai Henry
LandOfFree
Adjustable tool holder apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable tool holder apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable tool holder apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2993884