Rotatable machine spindle including a gas spring in which a...

Details Rotatable machine spindle including a gas spring in which a... Rotatable machine spindle including a gas spring in which a...

2005-05-24

2005-05-24

Banks, Derris H. (Department: 3722)

Gear cutting, milling, or planing

Milling

Cutter spindle or spindle support

C409S232000, C267S064110

Reexamination Certificate

active

06896455

ABSTRACT:
A machine spindle includes a rotatable casing in which a clamping device is mounted. The clamping device includes a drawbar for securing a cutting tool. The drawbar is axially displaced by a gas spring which includes a chamber in which a lubricant-containing gas medium is confined. A piston includes a head slidable within a cylindrical upper portion of the chamber, and a rod extending through a lower portion of the chamber and connected to the drawbar. The lower portion of the chamber is non-cylindrical and widens upwardly to promote the upward travel of lubricant toward the piston and upper seals under the effects of centrifugal force during rotation of the spindle.

REFERENCES:
patent: 3118345 (1964-01-01), Bullard, III et al.
patent: 4863324 (1989-09-01), Blessing
patent: 4884899 (1989-12-01), Schwartzman
patent: 4986704 (1991-01-01), Narushima et al.
patent: 5052436 (1991-10-01), Bauch et al.
patent: 5327979 (1994-07-01), Du et al.
patent: 5562373 (1996-10-01), Willingham et al.
patent: 5707186 (1998-01-01), Gobell et al.
patent: 5865578 (1999-02-01), Benedikter et al.
patent: 5979911 (1999-11-01), Rinne
patent: 6722827 (2004-04-01), Anderson
patent: 20020149140 (2002-10-01), Kitaura
patent: 34 23 060 (1986-01-01), None
patent: 38 24 580 (1990-01-01), None
patent: 38 24 581 (1990-01-01), None
patent: 43 39 439 (1995-03-01), None
patent: WO 0059666 (2000-10-01), None
European Search Report dated Sep. 11, 2003.

Affiliated with

Also associated with

Rating

Rotatable machine spindle including a gas spring in which a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rotatable machine spindle including a gas spring in which a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotatable machine spindle including a gas spring in which a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3375374