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Class Information
Number: 277/432
Name: Seal for a joint or juncture > Seal between relatively movable parts (i.e., dynamic seal) > Close proximity seal (e.g., contactless, fluent, etc.) > Formed by pressurized sealing fluid introduced to form barrier > External device or system
Description: Pressurized sealing fluid including an enclosure for the joint or juncture and means outside the enclosure to introduce the pressurized sealing fluid.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7531816 |
Vacuum conveying apparatus and charged particle beam equipment with the same |
May. 12, 2009 |
| 7392988 |
Rotary seal |
Jul. 1, 2008 |
| 7344139 |
Hydraulic shaft sealing arrangement for high-temperature applications |
Mar. 18, 2008 |
| 7278840 |
Compliant viscous seal for fluid transfer device |
Oct. 9, 2007 |
| 7278449 |
Switch, especially for branching off bulk material flows |
Oct. 9, 2007 |
| 7222861 |
Sealing in a hydraulic turbine unit |
May. 29, 2007 |
| 7059607 |
Positioning apparatus |
Jun. 13, 2006 |
| 6830426 |
Gas injection seal system for a centrifugal pump |
Dec. 14, 2004 |
| 6789804 |
Dry gas shutdown seal |
Sep. 14, 2004 |
| 6708981 |
Seal assemblies |
Mar. 23, 2004 |
| 6517079 |
Gas seal for continuous thermal treatment facilities operated with a protective gas atmosphere |
Feb. 11, 2003 |
| 6352265 |
Seal ring using gas curtain |
Mar. 5, 2002 |
| 6129246 |
Rotary feeder for dosing bulk material |
Oct. 10, 2000 |
| 6086333 |
Process and device for quickly reducing pressure in an installation, in particular a hydrogen-cooled generator |
Jul. 11, 2000 |
| 5855472 |
Diving bell submersible seal |
Jan. 5, 1999 |
| 5636847 |
Dual face seal clean barrier fluid and dynamic pressure control system |
Jun. 10, 1997 |
| 5553867 |
Triple cartridge seal having one inboard and two concentric seals for chemical processing pump |
Sep. 10, 1996 |
| 5451066 |
System for sealing the bearing of a machine, especially a turbomachine |
Sep. 19, 1995 |
| 5427500 |
Slurry pump seal system |
Jun. 27, 1995 |
| 5425543 |
Seal assembly for rotating shaft |
Jun. 20, 1995 |
| 5412977 |
Turbo machine with an axial dry gas seal |
May. 9, 1995 |
| 5392605 |
Method of and apparatus for reducing the pressure of a high pressure combustible gas |
Feb. 28, 1995 |
| 5372730 |
Filtering system for pump shaft seals |
Dec. 13, 1994 |
| 5348456 |
Helical dry screw expander with sealing gas to the shaft seal system |
Sep. 20, 1994 |
| 5228700 |
Contactless seal |
Jul. 20, 1993 |
| 5186277 |
Generator sealing oil temperature control method and apparatus utilizing temperature matching |
Feb. 16, 1993 |
| 5165699 |
Liquid full pressurized vessel seal |
Nov. 24, 1992 |
| 5147015 |
Seal oil temperature control method and apparatus |
Sep. 15, 1992 |
| 5104284 |
Thrust compensating apparatus |
Apr. 14, 1992 |
| 5078506 |
Bottom entry mixer shaft seal system for process vessels |
Jan. 7, 1992 |
| 5052694 |
Hydrostatic face seal and bearing |
Oct. 1, 1991 |
| 4951884 |
Power auger machine with bearing shield |
Aug. 28, 1990 |
| 4865075 |
Sealing device for air rotary joint |
Sep. 12, 1989 |
| 4821799 |
Grease injection control system |
Apr. 18, 1989 |
| 4819948 |
Submerged shaft seal |
Apr. 11, 1989 |
| 4795273 |
Propeller shaft bearing arrangement |
Jan. 3, 1989 |
| 4781553 |
Screw vacuum pump with lubricated bearings and a plurality of shaft sealing means |
Nov. 1, 1988 |
| 4733976 |
Propeller shaft bearing arrangement |
Mar. 29, 1988 |
| 4726689 |
Linear gas bearing with integral vacuum seal for use in serial process ion implantation equipment |
Feb. 23, 1988 |
| 4722663 |
Seal-off mechanism for rotating turbine shaft |
Feb. 2, 1988 |
| 4632402 |
Shaft seal with both hydrostatic and hydrodynamic pressure parts |
Dec. 30, 1986 |
| 4606652 |
Shaft seal for turbomachinery |
Aug. 19, 1986 |
| 4582327 |
Double fluid power recovery system and process therefor |
Apr. 15, 1986 |
| 4543038 |
Sealing apparatus and method and machinery utilizing same |
Sep. 24, 1985 |
| 4517804 |
Condenser vacuum retaining apparatus for steam power plant |
May. 21, 1985 |
| 4515512 |
Seal for high pressure pump or the like |
May. 7, 1985 |
| 4500093 |
Shaft seal system |
Feb. 19, 1985 |
| 4475735 |
System for sealing shafts against solid containing gaseous media |
Oct. 9, 1984 |
| 4428584 |
Piston rod seal for a Stirling engine |
Jan. 31, 1984 |
| 4427202 |
Combination static oil seal and rotary dust seal |
Jan. 24, 1984 |
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