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:
Sep. 07, 1976
Filed:
Nov. 26, 1974
Hiroo Iwase, Juocho, JA;
Satoshi Ninomiya, Hitachi, JA;
Hitachi, Ltd., , JA;
Abstract
A seal device for use in the flange mating surfaces of a vacuum container of the type, in which there are provided a first member and a second member, both of which are formed with flanges, respectively, and in which the aforesaid flanges are bolted together so as to maintain the interior of the container to a lower pressure, as compared with the atmospheric pressure. With this type container, the aforesaid bolts are located outwardly on the flange mating surfaces, and a first space is provided on the innermost side of the flange mating surfaces but inwardly of the aforesaid bolts, while a second space is provided thereon between the bolts and the first space. The first space is communicated with steam guide holes provided in either of the aforesaid flanges, while steam guide holes are in communication with a steam generating source so that steam having a pressure higher than the atmospheric pressure outside the container is introduced into the first space. On the other hand, the second space is in communication with steam discharge holes provided in either of the flanges, while the aforesaid steam discharge holes are in communication with a pressure maintaining means adapted to maintain the second space to a pressure lower than the atmospheric pressure outside the container.