Lubrication – Systems – Vertical shaft
Reexamination Certificate
2011-04-26
2011-04-26
Le, David D (Department: 3655)
Lubrication
Systems
Vertical shaft
C277S551000, C277S559000
Reexamination Certificate
active
07931125
ABSTRACT:
A shaft seal assembly for use with a reciprocating or rotating shaft includes a shaft seal, a lubricant-storing ring, and a retainer. The retainer and ring can be formed as a subassembly and then combined with a shaft seal. The seal includes an annular body portion, a first sealing lip portion, and a first pocket portion. The first sealing lip portion has a substantially uniform axial dimension and is adapted to sealingly engage a shaft. The first pocket portion includes a plurality of pockets, each having an opening toward the first sealing lip portion. The plurality of pockets are each adapted to collect a working fluid when the shaft axially displaces in a first direction and to dispense the working fluid when the shaft axially displaces in a second direction. The assembly provides a lubricated shaft and seal that improves the effective life of the shaft seal.
REFERENCES:
patent: 2997318 (1961-08-01), Lansky et al.
patent: 3511512 (1970-05-01), Wheelock
patent: 3586342 (1971-06-01), Staab
patent: 3868105 (1975-02-01), Bentley
patent: 3873104 (1975-03-01), Bainard
patent: 3923315 (1975-12-01), Hadaway
patent: 3984113 (1976-10-01), Bentley
patent: 4493490 (1985-01-01), Ohma
patent: 4750747 (1988-06-01), Holzer
patent: 4815763 (1989-03-01), Hartmann
patent: 5472072 (1995-12-01), Bumgarner
patent: 5477949 (1995-12-01), Forster et al.
patent: 5529155 (1996-06-01), Jones et al.
patent: 5531299 (1996-07-01), Bataille
patent: 5906047 (1999-05-01), Miller et al.
patent: 5913548 (1999-06-01), Keck
patent: 6004039 (1999-12-01), Yabe et al.
patent: 6035969 (2000-03-01), Pyle
patent: 6073933 (2000-06-01), Johnston
patent: 6158559 (2000-12-01), Asa et al.
patent: 6234505 (2001-05-01), Ito
patent: 6328292 (2001-12-01), Jarstad
patent: 6726211 (2004-04-01), Kuroki et al.
patent: 2001/0045721 (2001-11-01), Heydenreich
patent: 2002/0092722 (2002-07-01), Hosoda et al.
patent: 2003/0001358 (2003-01-01), Becker et al.
patent: 2003/0011134 (2003-01-01), Frauhammer et al.
patent: 2003/0019692 (2003-01-01), Downes et al.
patent: 2003/0155718 (2003-08-01), Lewis et al.
Downes Michael D.
LaPlante Robert P.
Chau Terry
Freudenberg-NOK General Partnership
Harness & Dickey & Pierce P.L.C.
Le David D
Wangerow, Esq. Ronald W.
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