US3630529A - Sodium vapor trap - Google Patents
Sodium vapor trap Download PDFInfo
- Publication number
- US3630529A US3630529A US821598A US3630529DA US3630529A US 3630529 A US3630529 A US 3630529A US 821598 A US821598 A US 821598A US 3630529D A US3630529D A US 3630529DA US 3630529 A US3630529 A US 3630529A
- Authority
- US
- United States
- Prior art keywords
- trap
- housing
- sodium vapor
- shaft
- sodium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
- F16J15/4472—Labyrinth packings with axial path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
- F04D7/065—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals for liquid metal
Definitions
- ABSTRACT A sodium vapor trap for sealing a rotary shaft to a housing, the trap having a stationary member carried by the [52] U.S.Cl 277/22, housing and Surrounding the Shaft and a rotary member can 277,56 165,73 ried by the shaft for rotation within the stationary member, the
- This invention relates to a sodium vapor trap for sealing a rotary shaft to a housing having a shaft opening with a rotary shaft extending thcrethrough. More particularly, the invention relates or pertains to such a trap for mounting between a vertical shaft and a housing surrounding it.
- the sodium vapor trap of the present invention is adapted to prevent the escape of sodium vapor along the vertical shaft of a liquid sodium pump from the space within the pump to the space outside the pump.
- liquid sodium pumps of the prior art have included a centrifugal impeller driven by a vertical shaft extending above the impeller through a pump barrel and passing through a shaft opening in the head of the barrel.
- the shaft is driven by an electric motor mounted on the top of the barrel.
- a shaft seal, of the mechanical seal type, and shaft bearings have been provided between the head of the pump barrel and the electric motor thereabove.
- the shaft seal has prevented the escape of argon used as protective atmosphere over the liquid sodium in the pump.
- the impeller shaft rotates in a tube that is spaced with a close clearance from the shaft and sealed by transverse partitions at the top and bottom of the tube to the interior of the pump barrel.
- the space enclosed by the upper and lower partitions, the shaft tube, and the pump barrel is filled with insulation or shielding material to prevent or minimize the escape of sodium vapor and to block radiation, if the sodium is radioactive.
- the space between the shaft and the shaft tube is open at the bottom to the sodium-vapor-containing atmosphere above the liquid sodium in the pump, and is open at the top to allow escape of sodium vapor into the mechanical seal compartment thereabove.
- Such sodium vapor as migrates into the mechanical seal compartment condenses therein to solid sodium and interferes with the proper functioning of the seals.
- An object of the invention is to provide a sodium vapor trap for substantially eliminating the escape of sodium vapor from a housing along a shaft, such as a pump impeller shaft, that extends into the housing through a shaft opening.
- a further object is to provide such a trap that will act as a reflux condenser to condense the sodium vapor to liquid and return it as a liquid to the housing.
- a sodium vapor trap for sealing a rotary shaft to a housing having a shaft opening with a rotary shaft to a housing having a shaft opening with a rotary shaft extending therethrough, the trap substantially preventing the escape of sodium vapor along the shaft from the space within the housing to the space outside the housing, the trap comprising: a rotary member carried by and sealed to the shaft; a stationary member surrounding the rotary member and carried by and sealed to the housing; the rotary member having axially spaced, transverse baffles projecting away from its axis; and the stationary member having axially spaced, transverse baf fles projecting toward its axis and cooperating with the firstmentioned baffles to provide a tortuous passageway communicating the space within the housing with the space outside the housing.
- FIG. I is an axial, sectional view of portion of a sodium pump with a sodium vapor trap in accordance with the invention installed therein;
- FIG. 2 is an enlarged axial sectional view of a portion of the structure of FIG. 1 that shows in section the sodium vapor trap shown in elevation in FIG. 1;
- FIG. 3 is a sectional view on a reduced scale taken along the line 3-3 of FIG. 2.
- FIG. 1 there is shown a portion of a liquid sodium pump having a pump barrel 10 with a flange ll welded to its top.
- a head 12 is sealed to the flange 11 by an O-ring 13.
- An annular, ring-shaped member 14 is supported upon the head 12 and is sealed to the latter by another O-ring 15.
- the member 14 supports a concentric ring 16, the two members being sealed to each other by yet another O-ring 17.
- a cylindrical housing member 18 is welded to the top of the ring 16, the housing member 18 supporting an electric motor (not shown) which drives the pump impeller (not shown) through a shaft 19, as is conventional.
- Bolts 21,21 having nuts 22,22 are employed to secure together the concentric annular ports 1 1, 12, 14 and 16.
- a dome 23 is welded to the annular, ring-shaped member 16 and has a sleeve 24 welded to it and surrounding the shaft 19, as more clearly seen in FIG. 2.
- a transverse plate 25 is welded to the housing member 18 and is positioned above the dome 23.
- This plate 25 carries a collar 26 providing a seat for a mechanical seal assembly designated by the general reference numeral 27 and having a stationary subassembly 28 and a rotary subassembly 29 carried by the shaft 19.
- the stationary subassembly has a nonrotating mechanical seal ring 30.
- a rotary mechanical seal ring 31 In rotating sealing relationship to this seal ring.
- This mechanical seal assembly prevents the escape of gas along the shaft from below the mechanical seal assembly to the atmosphere.
- a mechanical seal assembly of this type is known in the prior art, a further detailed description thereof is not deemed necessary herein.
- the rotating subassembly 29 of the mechanical seal has a depending skirt 61 carrying a flange or flinger 62 that rotates with the shaft. Any oil that seeps past the seal rings 30,31 is caught by the flinger 62 and spun outwardly into the chamber 63. As seen in FIG. 1, a conduit 64 drains the oil from the chamber 63 into a sump 65 from which it may be withdrawn upon removal of the plug 66. Thus, oil is prevented from flowing downwardly along the shaft into the sodium pump.
- the shaft 19 has a lower section 19a secured to an upper section 1% by screw 34, the two shaft sections being prevented from relative rotation by a key 35.
- a sodium vapor trap designated by the general reference numeral 36 is interposed between the shaft 19 and the head 12 for the purpose of substantially preventing the escape of sodium vapor along the shaft and across the head.
- the sodium vapor trap has a stationary member 37 carried by the head 12 and a rotary member 38 carried by the shaft 19; these members preferably are fabricated from austenitic stainless steel.
- the rotary member 38 has a cylindrical portion 39 fitted to the shaft section 19b. A reduced-diameter portion 41 of the rotary member is received in a corresponding rabbet 42 in the shaft section 19a. The rotary member is locked to the shaft section by a set screw 43.
- the cylindrical section 39 carries axially spaced, outwardly projecting, downwardly sloping baffles in the form of fins 44. These fins are bodies of revolution and have the same outer diameters; they are evenly spaced in the axial direction and sloped downwardly at an angle of approximately 30 from the horizontal.
- the rotary member 38 has a cap portion 45 with a horizontal top 46 and depending skirt 47.
- the cap overlies the stationary member 37 and is spaced slightly therefrom so that it may rotate freely and without interference and yet provide for the outward flow of gas between the stationary and rotary members of the trap.
- An O-ring 48 seals the rotary member to the lower shaft section 19a. It will be seen that the fins 44 have a uniform thickness.
- the stationary member 37 of the trap is welded to the barrel head 12.
- the stationary member is generally cylindrical. it has a bottom portion 49 that closely encircles the shaft section 190 and underlies the bottom portion of the rotary member 38.
- the portion 49 receives the upper end of a tube 51 that encompasses the lower section 19a of the shaft and is spaced therefrom to provide a clearance 52.
- the upper end of the tube 51 is received in a recess 53 in the bottom portion of the stationary member and is welded therein.
- the stationary member 37 has a plurality of inwardly projecting baffle members 54 positioned opposite to the spaces between the fins 44 on the rotary member. These baffle members have generally horizontal bottom surfaces 55, cylindrical inner surfaces 56, and downwardly sloping upper surfaces 57.
- the inner diameters of the baffle members are equal and slightly greater than the outer diameters of the fins 44 of the rotary member; this enables the rotary member to be inserted into and removed from the stationary member.
- the sodium vapor trap 36 acts as a reflux condenser for the sodium vapor that rises through the clearance space 52 between the shaft section 190 and the tube 51.
- This sodium vapor is carried in an inert atmosphere such as an atmospheie of argon, the argon being employed to prevent oxidation of the sodium and sodium vapor in the pump.
- the sodium vapor passing between the rotary and stationary members of the trap is deflected by the fins and baffle members against the internal surfaces of the trap upon which the sodium vapor is condensed to the liquid state,, the liquid flowing downwardly along the internal surfaces of the trap and returning towards the pump through the clearance space 52.
- the interior surfaces of the trap components should be so sloped that all of the condensed metal will flow back to the pump; preferably there should be no recesses in the trap to retain condensed metal.
- the shape and disposition of the fins 44 tends to direct the flow of argon and sodium vapor substantially normally upon the upper faces 57 of the baffle members 54. These surfaces 57 are the principal condensing surfaces of the trap; they are cooled more rapidly than the fins 44, as the heat radiates outwardly from the radial outer surfaces of the stationary member 37.
- Condensation of sodium vapor and radiation from the trap maintain the condensing surfaces of the trap slightly to somewhat above the melting point ofsodium, namely, 995 C.
- the trap of the present invention is extremely efficient, and substantially no sodium vapor exits from the trap into the space beyond the trap. Moreover, because the sodium vapor condenses to a liquid, and not to solid metal, the interior of the trap does not become clogged with condensed solid metal. Rotation of the shaft, and with it the rotary member 38 of the trap, promotes high condensation efficiency. The rotary motion causes the gasses to impinge on the stationary member with higher velocity than would be the case without such rotation. This higher velocity improves condensation. Although the trap is more efficient when the member 38 rotates, it nevertheless is an effective reflux condenser when the member 38 is stationary.
- sodium vapor from the pump cannot escape to any appreciable extent and condense as liquid or solid metal in and around the shaft and mechanical seal assembly.
- the trap can also be employed to condense other metal vapors, more particularly alkali metal vapors, and specifically vapors of potassium or sodium-potassium alloys known as NAK. Therefore, the term sodium is used herein in a generic sense, and is not intended to limit the invention to the condensation of sodium vapor, but is intended to be broadly construed to include other alkali metals and alloys thereof.
- the number of alternate fins and baffle members may be more or less than the four shown in the drawings.
- said rotary member having axially spaced, transverse baffles projecting away from its axis;
- said stationary member having axially spaced, transverse baffles projecting toward its axis and cooperating with said first-mentioned baffles to provide a tortuous passageway communicating the space within the housing with the space outside the housing; said members constituting means for maintaining said trap at a temperature above the melting point of said sodium such that vapor thereof between said members is condensed to the liquid state,
- baffles sloping downwardly toward the interior of the housing such that the condensed liquid sodium flows freely into the space within the housing.
Abstract
Description
Claims (8)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82159869A | 1969-05-05 | 1969-05-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3630529A true US3630529A (en) | 1971-12-28 |
Family
ID=25233796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US821598A Expired - Lifetime US3630529A (en) | 1969-05-05 | 1969-05-05 | Sodium vapor trap |
Country Status (9)
Country | Link |
---|---|
US (1) | US3630529A (en) |
JP (1) | JPS5026761B1 (en) |
BR (1) | BR7017585D0 (en) |
CH (1) | CH513353A (en) |
DE (1) | DE2019653B2 (en) |
FR (1) | FR2047249A5 (en) |
GB (1) | GB1259935A (en) |
NL (1) | NL163310C (en) |
ZA (1) | ZA701441B (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4109920A (en) * | 1977-09-06 | 1978-08-29 | Borg-Warner Corporation | Heat exchanger for shaft seal cartridge |
US4219201A (en) * | 1978-05-24 | 1980-08-26 | Carrier Corporation | Sealing assembly |
US4296538A (en) * | 1978-05-24 | 1981-10-27 | Carrier Corporation | Method of providing a sealing assembly between a steam chest and turbine casing |
US5244216A (en) * | 1988-01-04 | 1993-09-14 | The Texas A & M University System | Labyrinth seal |
US5624245A (en) * | 1994-10-26 | 1997-04-29 | Mp Pumps, Inc. | Centrufugal pump with thermally isolated and dynamically air cooled shaft seal assembly |
US5639095A (en) * | 1988-01-04 | 1997-06-17 | Twentieth Technology | Low-leakage and low-instability labyrinth seal |
EP1396612A1 (en) * | 2002-09-04 | 2004-03-10 | BorgWarner Inc. | Sealing for a fluid energy machine |
FR2873183A1 (en) * | 2004-07-16 | 2006-01-20 | Thales Sa | DEVICE FOR SEALING A ROTATING MACHINE |
US20070065276A1 (en) * | 2005-09-19 | 2007-03-22 | Ingersoll-Rand Company | Impeller for a centrifugal compressor |
US20070063449A1 (en) * | 2005-09-19 | 2007-03-22 | Ingersoll-Rand Company | Stationary seal ring for a centrifugal compressor |
CN101886701A (en) * | 2009-05-12 | 2010-11-17 | 通用电气公司 | The method and system that is used for sealing ring portion |
US20180283558A1 (en) * | 2017-03-29 | 2018-10-04 | Ross H. Peterson | Interlocking Axial Labyrinth Seal |
US10281046B2 (en) * | 2015-06-05 | 2019-05-07 | Danfoss Commercial Compressors | Fluid machine having a labyrinth seal |
US20190162313A1 (en) * | 2016-04-15 | 2019-05-30 | Safran Transmission Systems | Contactless labyrinth seal obtained by additive manufacturing |
US10544792B2 (en) * | 2014-11-19 | 2020-01-28 | Joint Stock Company “Akme-Engineering” | Molten metal transfer pump |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5478468U (en) * | 1977-11-14 | 1979-06-04 | ||
JP3231342B2 (en) * | 1991-01-30 | 2001-11-19 | 株式会社日立製作所 | Electromagnetic coil |
KR950005393Y1 (en) * | 1991-04-01 | 1995-07-08 | 주식회사 Lg전자 | Tv screens |
DE19712324C2 (en) * | 1997-03-24 | 2000-05-11 | Renner Gmbh | Circulation pump or agitator for heated chemical solutions |
GB9713045D0 (en) * | 1997-06-21 | 1997-08-27 | Perkins Ltd | A rotary shaft sealing system |
DE10149606C2 (en) * | 2001-10-09 | 2003-12-24 | Mettler Toledo Gmbh | Labyrinth seal with detachable ring element and scale |
DE102004055429B3 (en) * | 2004-11-17 | 2006-08-10 | Man B & W Diesel Ag | Sealing device for a particularly lubricated at standstill bearing a rotor shaft |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1634246A (en) * | 1924-05-01 | 1927-06-28 | Sharples Specialty Co | Centrifugal machine and process involving the use of the same |
US2600991A (en) * | 1949-06-14 | 1952-06-17 | Gen Electric | Labyrinth seal arrangement |
DE966442C (en) * | 1955-11-03 | 1957-08-08 | Augsburg Nuernberg A G Zweigni | Single-acting, valve-controlled alternating current steam engine for high overheating and oil-free exhaust steam |
US2981490A (en) * | 1957-12-27 | 1961-04-25 | Entoleter | Centrifugal impacting apparatus and support therefor |
-
1969
- 1969-05-05 US US821598A patent/US3630529A/en not_active Expired - Lifetime
-
1970
- 1970-03-04 GB GB10524/70A patent/GB1259935A/en not_active Expired
- 1970-03-04 ZA ZA701441A patent/ZA701441B/en unknown
- 1970-03-19 BR BR217585/70A patent/BR7017585D0/en unknown
- 1970-04-23 DE DE19702019653 patent/DE2019653B2/en active Granted
- 1970-04-27 NL NL7006076.A patent/NL163310C/en not_active IP Right Cessation
- 1970-05-04 FR FR7016188A patent/FR2047249A5/fr not_active Expired
- 1970-05-04 CH CH668170A patent/CH513353A/en not_active IP Right Cessation
- 1970-05-06 JP JP45037989A patent/JPS5026761B1/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1634246A (en) * | 1924-05-01 | 1927-06-28 | Sharples Specialty Co | Centrifugal machine and process involving the use of the same |
US2600991A (en) * | 1949-06-14 | 1952-06-17 | Gen Electric | Labyrinth seal arrangement |
DE966442C (en) * | 1955-11-03 | 1957-08-08 | Augsburg Nuernberg A G Zweigni | Single-acting, valve-controlled alternating current steam engine for high overheating and oil-free exhaust steam |
US2981490A (en) * | 1957-12-27 | 1961-04-25 | Entoleter | Centrifugal impacting apparatus and support therefor |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4109920A (en) * | 1977-09-06 | 1978-08-29 | Borg-Warner Corporation | Heat exchanger for shaft seal cartridge |
US4219201A (en) * | 1978-05-24 | 1980-08-26 | Carrier Corporation | Sealing assembly |
US4296538A (en) * | 1978-05-24 | 1981-10-27 | Carrier Corporation | Method of providing a sealing assembly between a steam chest and turbine casing |
US5244216A (en) * | 1988-01-04 | 1993-09-14 | The Texas A & M University System | Labyrinth seal |
US5639095A (en) * | 1988-01-04 | 1997-06-17 | Twentieth Technology | Low-leakage and low-instability labyrinth seal |
US5624245A (en) * | 1994-10-26 | 1997-04-29 | Mp Pumps, Inc. | Centrufugal pump with thermally isolated and dynamically air cooled shaft seal assembly |
EP1396612A1 (en) * | 2002-09-04 | 2004-03-10 | BorgWarner Inc. | Sealing for a fluid energy machine |
FR2873183A1 (en) * | 2004-07-16 | 2006-01-20 | Thales Sa | DEVICE FOR SEALING A ROTATING MACHINE |
WO2006008232A1 (en) * | 2004-07-16 | 2006-01-26 | Thales | Sealing device for a rotating machine |
US8376368B2 (en) | 2004-07-16 | 2013-02-19 | Thales | Sealing device for a rotating machine |
US20070063449A1 (en) * | 2005-09-19 | 2007-03-22 | Ingersoll-Rand Company | Stationary seal ring for a centrifugal compressor |
US20070065276A1 (en) * | 2005-09-19 | 2007-03-22 | Ingersoll-Rand Company | Impeller for a centrifugal compressor |
CN101886701A (en) * | 2009-05-12 | 2010-11-17 | 通用电气公司 | The method and system that is used for sealing ring portion |
US20100288474A1 (en) * | 2009-05-12 | 2010-11-18 | Constantin Dinu | Method and system for sealing an annulus |
US8424877B2 (en) * | 2009-05-12 | 2013-04-23 | General Electric Company | Method and system for sealing an annulus |
CN101886701B (en) * | 2009-05-12 | 2015-04-01 | 通用电气公司 | Method and system for sealing an annulus |
AU2010201912B2 (en) * | 2009-05-12 | 2016-02-04 | Air Products And Chemicals, Inc. | Method and apparatus for sealing an annulus |
US10544792B2 (en) * | 2014-11-19 | 2020-01-28 | Joint Stock Company “Akme-Engineering” | Molten metal transfer pump |
US10281046B2 (en) * | 2015-06-05 | 2019-05-07 | Danfoss Commercial Compressors | Fluid machine having a labyrinth seal |
US20190162313A1 (en) * | 2016-04-15 | 2019-05-30 | Safran Transmission Systems | Contactless labyrinth seal obtained by additive manufacturing |
US11047480B2 (en) * | 2016-04-15 | 2021-06-29 | Safran Transmission Systems | Contactless labyrinth seal obtained by additive manufacturing |
US20180283558A1 (en) * | 2017-03-29 | 2018-10-04 | Ross H. Peterson | Interlocking Axial Labyrinth Seal |
US10584795B2 (en) * | 2017-03-29 | 2020-03-10 | Florida Turbine Technologies, Inc. | Interlocking axial labyrinth seal |
Also Published As
Publication number | Publication date |
---|---|
BR7017585D0 (en) | 1973-04-10 |
GB1259935A (en) | 1972-01-12 |
NL163310B (en) | 1980-03-17 |
DE2019653A1 (en) | 1970-11-19 |
NL163310C (en) | 1980-08-15 |
ZA701441B (en) | 1971-09-29 |
JPS5026761B1 (en) | 1975-09-03 |
DE2019653C3 (en) | 1978-04-13 |
NL7006076A (en) | 1970-11-09 |
FR2047249A5 (en) | 1971-03-12 |
CH513353A (en) | 1971-09-30 |
DE2019653B2 (en) | 1977-08-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CITIBANK, N.A., NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:BORG-WARNER INDUSTRIAL PRODUCTS, INC.,;REEL/FRAME:004745/0480 Effective date: 19870520 Owner name: BORG-WARNER INDUSTRIAL PRODUCTS, INC., CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BORG-WARNER CORPORATION;REEL/FRAME:004745/0469 Effective date: 19870514 Owner name: CITIBANK, N.A., 641 LEXINGTON AVE., NEW YORK, NY 1 Free format text: SECURITY INTEREST;ASSIGNOR:BORG-WARNER INDUSTRIAL PRODUCTS, INC.,;REEL/FRAME:004745/0480 Effective date: 19870520 Owner name: BORG-WARNER INDUSTRIAL PRODUCTS, INC., 200 OCEANGA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BORG-WARNER CORPORATION;REEL/FRAME:004745/0469 Effective date: 19870514 |
|
AS | Assignment |
Owner name: BW/IP INTERNATIONAL, INC., ("BW/IP"),A CORP. OF DE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BORG-WARNER CORPORATION, A DE. CORP.;REEL/FRAME:004836/0834 Effective date: 19880215 Owner name: BW/IP INTERNATIONAL, INC., ("BW/IP"), 200 OCEANGAT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE MAY 20, 1987;ASSIGNOR:BORG-WARNER CORPORATION, A DE. CORP.;REEL/FRAME:004836/0834 Effective date: 19880215 |
|
AS | Assignment |
Owner name: CITIBANK, N.A., NEW YORK Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BW/IP INTERNATIONAL INC. (FORMERLY KNOWN AS BORG-WARNER INDUSTRIAL PRODUCTS, INC.);REEL/FRAME:006376/0881 Effective date: 19910831 |