Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Reexamination Certificate
2006-09-20
2009-06-23
Look, Edward (Department: 3745)
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
C415S231000, C277S500000, C277S503000
Reexamination Certificate
active
07549836
ABSTRACT:
A bearing seal assembly includes a pair segmented circumferential or a carbon ring seals to contain oil in the bearing compartments of a gas turbine engine or other mechanical device. The pair of seals, an oil-side seal and an air-side seal, are axially-spaced between the oil and the air in the housing. Air at an elevated pressure is introduced between the seals. This elevated air pressure urges the seals axially apart from one another and radially inward to improve the seal. A backup seal is provided adjacent either the oil-side seal or the air-side seal. In the event of failure of either the oil-side seal or the air-side seal which results in the loss of air pressure, the backup seal will provide at least a minimum level of seal between the oil compartment and the air in the housing.
REFERENCES:
patent: 1317294 (1919-09-01), Hildebrand
patent: 1331360 (1920-02-01), Algernon et al.
patent: 1331552 (1920-02-01), Algernon et al.
patent: 1332062 (1920-02-01), Algernon et al.
patent: 1828178 (1931-10-01), Fox
patent: 2621087 (1952-12-01), Kluge
patent: 3076659 (1963-02-01), Kremer, Jr.
patent: 3501245 (1970-03-01), Ivanko
patent: 4482158 (1984-11-01), Ishitani et al.
patent: 4501430 (1985-02-01), Kuhl et al.
patent: 4706971 (1987-11-01), Schirmer
patent: 5301957 (1994-04-01), Hwang et al.
patent: 5344160 (1994-09-01), Scarlata et al.
patent: 6431550 (2002-08-01), Tong
patent: 0 803 668 (1997-10-01), None
patent: 2 140 880 (1984-12-01), None
patent: 59-115433 (1984-07-01), None
patent: 59-231141 (1984-12-01), None
patent: 10-169781 (1998-06-01), None
European Search Report, Jun. 16, 2005.
Anderson James H.
Picard Harrison R.
Carlson & Gaskey & Olds
Look Edward
United Technologies Corporation
Wiehe Nathaniel
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