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:
Feb. 05, 1980
Filed:
Jan. 19, 1978
Applicant:
Inventors:
Tom Johannisson, Vasteras, SE;
Kai Nilsson, Vasteras, SE;
Rolf Sjoblom, Vasteras, SE;
Marja Widell, Vasteras, SE;
Assignee:
ASEA Aktiebolag, Vasteras, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
72 60 ; 72 43 ; 260420 ;
Abstract
The pressure medium used in the pressure chamber of a hydrostatic press is degassified in a degassing tank prior to delivery to the pressure chamber so as to improve the resistance of the pressure cylinder, or the liner inside of the pressure cylinder, to fatigue. The degassified pressure medium can be a mixture of recirculated pressure medium recovered after passage through the die extrusion hole and new pressure medium, such as castor oil.