Reamer
Patent
·
OSTI ID:6396367
A reamer used in earth boring by the rotary method includes a body having a plurality of sockets in its outer periphery. Upper and lower blocks are disposed in the socket for supporting a shaft. A roller is rotatably mounted on the shaft with the inner periphery of the roller and the outer periphery of the shaft providing bearings for the roller. The shaft has an upper annular shoulder with a downwardly facing sealing surface disposed above the bearings. Upper and lower seals are disposed above and below the bearings with the upper seals having a facing seal sealingly engaging the roller and the downwardly facing sealing surface on the shoulder of the shaft.
- Assignee:
- Smith International Inc.
- Patent Number(s):
- US 4480704
- OSTI ID:
- 6396367
- Country of Publication:
- United States
- Language:
- English
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