Bearing seal for a drill head assembly

Details Bearing seal for a drill head assembly Bearing seal for a drill head assembly

1980-08-11

1982-07-13

Footland, Lenard A.

Cutlery

308207R, F16C 3378

Patent

active

043391613

ABSTRACT:
A drill housing includes an internal chamber with a rotatable drill retaining member positioned in the chamber and extending outwardly through the chamber upper open end portion. A hub member is positioned in surrounding nonrotatable engagement with the drill retaining member. A rotary motor is drivingly connected to the hub member to transmit rotation to the drill retaining member. The drill retaining member has a socket for receiving the shank of a drill steel that rotates with the drill retaining member. A first main bearing rotatably supports the hub member, and a stationary bearing carrier supports the first main bearing. A cover plate surrounds the drill retaining member and rotates with the hub member. A bearing seal is positioned between the cover plate and the bearing carrier to seal the first main bearing. The bearing seal has a rotatable portion that rotates with the cover plate and a stationary portion that abuts the bearing carrier. The stationary portion carries an annular seal in sealing relation with the bearing carrier. The annular seal is compressible to absorb lateral and vertical thrust forces from the drill steel and to transfer the forces to the first main bearing. The bearing seal by permitting horizontal and vertical movement to be transmitted outwardly from the drill retaining member, eliminates separation of the annular seal from its supporting surface.

REFERENCES:
patent: 2667388 (1954-01-01), Schick
patent: 2712970 (1955-07-01), Spicacci
patent: 2913289 (1959-11-01), Stevenson
patent: 3190369 (1965-06-01), Pyles
patent: 3218110 (1965-11-01), Conner
patent: 3547206 (1970-12-01), Phillips
patent: 3654961 (1972-04-01), Phillips
patent: 3861765 (1975-01-01), Follert et al.
patent: 4060289 (1977-11-01), Gee et al.
patent: 4061377 (1977-12-01), Nordstrom
patent: 4084861 (1978-04-01), Greenberg et al.
patent: 4092054 (1978-05-01), Dye
patent: 4283963 (1981-08-01), Hickey et al.
patent: 4304446 (1981-12-01), Goodine

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