Rotary shaft seal for drill bit cutters

Details Rotary shaft seal for drill bit cutters Rotary shaft seal for drill bit cutters

1986-09-18

1988-05-31

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 92, 277 95, 277170, 277177, F16J 1534

Patent

active

047476044

ABSTRACT:
A rotary shaft seal for the rotary cutter of a each boring drill bit includes a fixed seal ring fitted securely in the cutter and having an end face which includes a first tapered surface, a floating seal ring having an end face, which includes a second tapered surface opposing the first tapered surface, and a curved inner circumferential surface, and a resilient O-ring compressed between the curved inner circumferential surface of the floating ring and a bearing portion on which the cutter is rotatably journalled.

REFERENCES:
patent: 3339928 (1967-09-01), Wolthausen
patent: 3529840 (1970-09-01), Durham et al.
patent: 3761145 (1973-09-01), Schumacher, Jr.
patent: 4176848 (1979-12-01), Lafuze
patent: 4344629 (1982-08-01), Oelke
patent: 4372624 (1983-02-01), Neilson
patent: 4516641 (1985-05-01), Burr

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