Resilient bearing seal with ability to compensate for wear and c

Details Resilient bearing seal with ability to compensate for wear and c Resilient bearing seal with ability to compensate for wear and c

1983-06-20

1986-05-13

Smith, Robert I.

Bearings

Rotary bearing

Roller drill bit

175227, 277 92, 277177, E21B 1008

Patent

active

045883092

ABSTRACT:
A seal assembly particularly adapted for sealing rock bit bearings is disclosed. The seal comprises an O-ring made of a resilient material which swells substantially when effectively exposed to a lubricant used for lubricating the bearing. The O-ring seal is mounted into the rock bit in a relatively low state of compression or squeeze between the surfaces to be sealed. During operation of the bit, the O-ring seal swells due to exposure to the lubricant, and consequently compression or squeeze of the seal increases substantially. The novel seal assembly compensates for undesirable compression set and wear of the O-ring.

REFERENCES:
patent: 2849070 (1958-08-01), Maly
patent: 4429854 (1984-02-01), Kar
patent: 4466622 (1984-08-01), Deane
patent: 4516640 (1985-05-01), Karlsson
patent: 4516641 (1985-05-01), Burr
patent: 4552233 (1985-11-01), Klima

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