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:
Apr. 13, 1976
Filed:
Dec. 05, 1974
Applicant:
Inventor:
Pertti Syvakari, Helsingborg, SW;
Assignee:
Allmanna Svenska Elektriska Aktiebolaget, Vasteras, SW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72 63 ; 92102 ;
Abstract
A hydraulic press includes a pressure cell which includes a diaphragm of flexible material with an opening therein surrounded by an annular bead. There are two disc-shaped attachment members for the diaphragm which form between them a first annular groove which fits the bead. The bead and one of the annular members have opposed annular recesses therein, which face a surface of the other annular member. These thus form an annular channel, in which are arranged two sealing rings, one fitting between the bead and one of the attachment members and the other fitting between the two attachment members.