The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2000
Filed:
Mar. 10, 1999
Applicant:
Inventors:
Helmut Friedrich Link, Aichwald, DE;
Gunther-Heinrich Trautmann, Kirchheim, DE;
Assignee:
Index-Werke GmbH & Co. KG Hahn & Tessky, Esslingen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
82147 ; 82165 ; 82168 ; 279114 ;
Abstract
A workpiece spindle device for a machine tool having a drivable workpiece spindle in a spindle housing and including a hydraulic oil supply device with a non-rotating housing portion connected to the spindle housing. An oil control device is connected to the non-rotating housing and communicated to the oil supply device without an oil line therebetween. An oil flow path is provided between the oil control device and a cylinder chamber of a workpiece clamping cylinder of the spindle with the oil path being free of any valve and thus substantially unrestricted to oil flow.