Seal ring for drill bit assemblies

Details Seal ring for drill bit assemblies Seal ring for drill bit assemblies

1978-12-13

1980-11-25

Schmidt, Frederick R.

Cutlery

175372, 277203, 277204, 308187, F16C 1900, F16C 3376

Patent

active

042354803

ABSTRACT:
A sliding seal ring for a drill bit comprising at least one cutter rotatably mounted on a journal forming part of the drill bit body. The seal ring is made of elastic metallic strip material and is of spiral configuration with the spirals in overlapping relation. The seal ring is mounted under axial tension between the pocket in an edge ring and the drill bit body and rotates with the cutter. In one form of the invention, the spirals are in abutting relation to provide a complete seal. In another form the spirals are open to define gaps permitting flow of flushing liquid to cool and lubricate the bearings supporting the cutter on the trunnion.

REFERENCES:
patent: 1952339 (1934-03-01), Solenberger
patent: 3160416 (1964-12-01), Ryffel
patent: 3162185 (1964-12-01), Knoblock
patent: 3370895 (1968-02-01), Cason

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