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. 01, 1981
Filed:
Mar. 26, 1979
Manfred Galow, Essen, DE;
Wilhelm Busbach, Essen, DE;
Didier Engineering GmbH, Essen, DE;
Abstract
A drivable member has an opening therethrough and is positioned within a charging port of a chamber. The drivable member has suspended therefrom an inner cover. The drivable member is axially movable with respect to the charging port between a raised position, whereat the inner cover is moved into a sealing position against an inner surface of the charging port, and a lowered position, whereat the inner cover is moved away from the inner surface. An intermediate seal is formed between the exterior of the charging port and an exterior portion of the drivable member, and the intermediate seal is maintained during all positions of movement of the drivable member. An outer cover is selectively movable into sealing engagement with an upper portion of the drivable member to form an outer seal. The outer cover may be removed and replaced by a material supply container which also forms an outer seal with the upper portion of the drivable member. Thereafter, the drivable member may be moved to the lowered position thereof to open the inner seal, and material be charged from the container through the opening and the charging port into the interior of the chamber.