Seal-less head apparatus

Details Seal-less head apparatus Seal-less head apparatus

2005-12-16

2008-11-04

Siconolfi, Robert A (Department: 3683)

Lubrication

Systems

Machine tools

C409S135000, C409S136000, C409S231000, C384S107000, C277S400000

Reexamination Certificate

active

07445087

ABSTRACT:
A mill head assembly apparatus utilizing centrifugal hydrodynamic force to circulate lubrication oil while retaining the lubricant without the need for a replaceable (contact-type) seal, the apparatus comprising a set of stationary components including a trunnion, an oil ring, a bearing-retainer, and a collector ring and rotating components including a housing, a pump ring, and a baffle-ring, front and rear bearing means. The oil ring receives and circulates the lubrication oil to the bearing means, the housing is disposed with a plurality of housing passages to re-circulate the lubrication oil, and the forward and rear rotating interfaces to retain the lubrication oil within the front and rear mill head assembly. Potential lubrication oil leakage is retained and re-circulated back to the collector ring by close-tolerance seal means.

REFERENCES:
patent: 2402170 (1946-06-01), Lund
patent: 2577303 (1951-12-01), Bohlander
patent: 2621860 (1952-12-01), Gruender
patent: 3499653 (1970-03-01), Gardner
patent: 3527465 (1970-09-01), Guinard
patent: 4892418 (1990-01-01), Asada et al.
patent: 5112142 (1992-05-01), Titcomb et al.
patent: 5246294 (1993-09-01), Pan
patent: 5876124 (1999-03-01), Zang et al.
patent: 6378209 (2002-04-01), Gomyo et al.

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