Seal and bearing apparatus for bits

Details Seal and bearing apparatus for bits Seal and bearing apparatus for bits

1986-03-31

1986-12-16

Novosad, Stephen J.

Bearings

Rotary bearing

Roller drill bit

175371, E21B 1022

Patent

active

046293388

ABSTRACT:
A sealed bearing rock bit for drilling oil wells and the like that includes a spring bearing member rotatably supporting the cutters on the pins of the bit. The resiliency of the spring bearing member on each pin is utilized to bias an annular seal member in a direction to maintain a face-type seal in fluid-tight, sealing engagement preventing loss of lubricant from the bit and preventing the ingress of deleterious material into the bit.

REFERENCES:
patent: 3193028 (1965-07-01), Radzimovsky
patent: 4172502 (1979-10-01), van Nederveen
patent: 4359111 (1982-11-01), Gonzalez
patent: 4514098 (1985-04-01), Ippolito
patent: 4569601 (1986-02-01), Ippolito

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