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:
Jun. 15, 1982
Filed:
Jun. 18, 1980
Josef A Blach, Asperg, DE;
Automatik Apparate-Maschinenbau H. Hench GmbH, Groossostheim, DE;
Abstract
A processing shaft for screw machines for working materials of solid, liquid, plastic or highly viscous consistency, which processing shaft comprises a driving shaft with several sleeve-type work segments mounted thereon. Clamping means are associated with each two of adjacent end faces of said work segments for sealingly pressing said adjacent end faces against each other in axial direction, and a gas-filled O-ring received in grooves of the adjacent end faces for being compressed between said end faces. Each of the grooves has an annular zone against which said O-ring is pressed and in which any machining indentations having a peak-to-valley height of more than 2 .mu.m extend concentric to the driving shaft.