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:
Mar. 20, 1990
Filed:
Dec. 07, 1987
Siegmund Babendererde, Bad Vilbel, DE;
Hochtief Aktiengesellschaft Vorm. Gebr. Helfmann, Essen, DE;
Abstract
The movable tight-sealing ring is positioned between an excavator cover end and a form or casing structure. For a satisfactory movability of the excavator cover end interstice, the tight-sealing sealing ring is supported resiliently by adjustable supporting units freely movable relative to the excavator cover end and the casing or form structure. On one side the tight-sealing sealing ring is provided with a plurality of impressed material feed openings and on the other side with an elastic outer sealing member contactable on the inside of the excavator cover end as well as an elastic inner sealing member pressable against the outside of the form or casing structure.