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:
Jul. 22, 1980
Filed:
Sep. 22, 1978
Applicant:
Inventors:
Armin Olschewski, Schweinfurt, DE;
Wolfgang Huber, Schweinfurt, DE;
Assignee:
SKF Kugellagerfabriken GmbH, Schweinfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C / ;
U.S. Cl.
CPC ...
308-82 ; 308 361 ; 3081871 ;
Abstract
A rotary drilling bit having at least one cutter rotatably supported in a rolling bearing on a trunnion of the drilling bit body. An edge ring is provided with a seal fixed in the bored hole of the rotary cutter between the rollers of the rolling bearing and the drilling bit body which axially guides the rollers in one direction. The edge ring has a machined surface which faces the outside surface of the trunnion defining therebetween a narrow annular gap and the seal consists of at least one radially held seal ring arranged in the annular gap.