US3756741A - Jet propulsion pump assembly - Google Patents
Jet propulsion pump assembly Download PDFInfo
- Publication number
- US3756741A US3756741A US00209138A US3756741DA US3756741A US 3756741 A US3756741 A US 3756741A US 00209138 A US00209138 A US 00209138A US 3756741D A US3756741D A US 3756741DA US 3756741 A US3756741 A US 3756741A
- Authority
- US
- United States
- Prior art keywords
- wear
- ring
- impeller
- bowl
- pump assembly
- 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
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Classifications
-
- 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
- F04D29/086—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
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
- F04D29/0416—Axial thrust balancing balancing pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D3/00—Axial-flow pumps
- F04D3/005—Axial-flow pumps with a conventional single stage rotor
Definitions
- the invention relates to jet propulsion pump assemblies and more particularly to wear problems connected therewith.
- Jet propulsion pump assemblies have previously embodied a suction piece, a bowl, and a wear-ring installed between the suction piece and bowl by fasteners, the wear-ring facing the impeller within the bowl and having an internal surface contoured to the surface generated by the peripheral edges of the impeller blades.
- the impeller blades become loaded, by reason of which, a certain degree of deflection occurs. Accordingly, a slight initial spacing between the edges and the wear-ring during a quiescent condition of the pump, may not be adequate enough to allow for such deflection during loading, with the result that the wear-ring might gall or ball up, or the impeller could conceivably jam or freeze, particularly should a stone or large gravel find its way into the pump.
- FIG. I is a general view in phantom through a-jet pump assembly in which the present invention is incorporated;
- FIG. 2 is an enlarged view in section through the impeller and nozzle portion of the jet pump assembly of FIG. 1, taken in the planes 2-2 of FIG. 3;
- FIG. 3 is a view in sectiontaken in the plane 3-3 of FIG. 2, with the impeller removed;
- FIG. 4 is a view in section taken through the thrust bearing region of the jet pump assembly of FIG. 1.
- the jet pump assembly depicted in FIG. 1 involves a suction piece 1, a bowl 3 bolted thereto and terminating in a jet nozzle 5, the suction piece curving downwardly to the bottom of the boat in which it is to be installed, where it is exposed to the water beneath the boat for intake to the pump.
- An impeller 7 within the bowl is mounted on a shaft 9 which is supported at the discharge side of the impeller in a generally conical shaped hub 11 symmetrically located in the bowl and nozzle by radial vanes 13 which serves the added function of stabilizing flow of water from the impeller to the nozzle.
- the impeller shaft is supported in a thrust bearing assembly 17 installed in a housing 19 formed on the outer wall of the suction piece, said bearing assembly including a bearing 18.
- suction piece and the bowl are joined, as by a plurality of peripheral bolts 21, these two components are internally recessed to provide for reception of a wear-ring 23, and a pair of opposing shoulders 25, 27,
- the wear-ring is provided with a plurality of peripherally spaced dowels 29, preferably in the surface facing the suction piece, the dowels to be received in a corresponding number of holes similarly spaced about the periphery of the suction piece.
- the wear-ring instead of being fabricated of metal, in accordance with prior practice, is now fabricated of non-metallic material, and preferably molded from plastic, such for example, as polypropylene, as it has been discovered that, should the blade edges of an impeller engage a wear-ring when made of such material, the material will either give or wear or both give and wear, and will not gall or ball up.
- the wear-ring is so dimensioned and the iminto a rotatably supported socket 31, and the thrust bearing housing 19 comprises a portion 33 integral with the suction piece and an end portion 35 overlapping the socket, with the intervening space closed off by a seal 37, permitting limited longitudinal adjustment of this end portion.
- a retaining ring 39 installed in the outer race of the bearing 18 extends between the two portions of the housing.
- the impeller shaft and impeller can be adjustably shifted to the right as viewed in FIGS. 2 and 4.
- the impeller is initially adjusted by installing the number of shims necessary to effect a wearing in of the wear-ring.
- the initial adjustment should suffice, but should a subsequent adjustment be deemed necessary, additional shims may be added to accomplish such subsequent adjustment.
- the hub 11 is recessed adjacent the pressure side of the impeller, such recess joining a plurality of cavities 43 formed in the hub, with each cavity flow connected with a low pressure region in the nozzle by a connecting flow passage 45 formed in the hub.
- the hub recess is disposed at shallow cup 47 of plastic or other suitable non-metallic material, such shallow cup being secured by machine screws 49 into the hub partitions 51 formed between the cavities.
- the hub of the impeller is dimensioned to rotatably fit into this shallow cup, thrust pressure being developed along the edge of the cup. Due to the flow connection established between the inside of the shallow cup and the low pressure region of the nozzle, a pressure differential will develop across that portion of the impeller hub entering the shallow cup. Inasmuch as the fit between the impeller hub and the shallow cup is a rotational fit and not a leak tight joint, a limited flow of water will occur from the impeller hub to the nozzle via the chambers 43, thereby reducing the thrust against the impeller hub, with a consequent reduction in thrust against the thrust bearing.
- a jet propulsion pump assembly having a suction piece and a bowl terminating in a nozzle, a conical shaped hub support for an impeller assembly disposed axially of said bowl and connected to said bowl by a plurality of vanes to determine passages to said nozzle, a thrust bearing supported within said suction piece, an impeller assembly in said bowl supported by and between said hub support and said thrust bearing, said impeller assembly including an impeller having blades with their remote edges such as to generate a substantially conical surface at an angle to the axis of said impeller, a wear-ring installed between said suction piece and bowl in line with said blade edges, said wear-ring having an interior surface contoured to the surface generated by the remote edges of said impeller blades, and means for clamping said wear-ring between said suction piece and said bowl with said interior surface in proximity to said blade edges, said clamping means being independent of said wear-ring.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A jet propulsion pump assembly is provided with wear-ring of non-metallic material such as plastic, the wear-ring being installed so as to be worn in by rotation of the impeller when under load. Provision is made for reducing thrust on the impeller.
Description
United States Patent [191 Woell, Jr.
[ 1 Sept. 4, 1973 JET PROPULSION PUMP ASSEMBLY [75] Inventor: Fred T. Woell, Jr., Little Rock, Ark.
[73] Assignee: Jacuzzi Bros., Inc., Little Rock, Ark.
[22] Filed: Dec. 17, 1971 [21] Appl. No.: 209,138
[52] US. Cl 415/174, 415/104, 60/221, 277/137 [51] Int. Cl. F0411 29/08, F01d 3/00 [58] Field of Search 415/501, 174; 277/137; 60/200, 221, 222
[56] References Cited UNITED STATES PATENTS 3,405,526 10/1968 Aschauer 60/221 3,227,418 1/1966 West 415/l74 3,249,083 5/1966 lrgens 60/221 3,250,069 5/1966 Rhoda 3,603,599 9/1971 Laird 3,656,862 4/1972 Rahaim et al 4l5/l74 Primary Examiner-Henry F. Raduazo AttorneyEdward Brosler [57] 1 ABSTRACT A jet propulsion pump assembly is provided with wearring of non-metallic material such as plastic, the wearring being installed so as to be worn in by rotation of the impeller when under load. Provision is made for reducing thrust on the impeller.
4 Claims, 4 Drawing Figures "m xp PATENTEDSEFJIQTS sm-Ii 1 M2 INVENTOR FRED T. WOELL, JR. BY
ATTORNEY PAIENIEB E 3.756.741
VII/A I NVEN TOR.
FRED T. WOELL, JR.
ATTORNEY JET PROPULSION PUMP ASSEMBLY The invention relates to jet propulsion pump assemblies and more particularly to wear problems connected therewith.
Jet propulsion pump assemblies have previously embodied a suction piece, a bowl, and a wear-ring installed between the suction piece and bowl by fasteners, the wear-ring facing the impeller within the bowl and having an internal surface contoured to the surface generated by the peripheral edges of the impeller blades.
During operation of the pump, the impeller blades become loaded, by reason of which, a certain degree of deflection occurs. Accordingly, a slight initial spacing between the edges and the wear-ring during a quiescent condition of the pump, may not be adequate enough to allow for such deflection during loading, with the result that the wear-ring might gall or ball up, or the impeller could conceivably jam or freeze, particularly should a stone or large gravel find its way into the pump.
Further, the manner of installing the wear-ring into the pump assembly by use of fasteners, created a problem of replacement of the wear-ring, when and if such replacement became necessary. The loading of the impeller during operation, furthermore, results in a thrust which thrust is taken up by a thrust bearing. Such thrust has, to a degree, been reduced in the past, by providing a passage through the impeller from the suction side to the pressure side, which passage thereby exposed the high pressure side of the impeller to the low pressure on the suction side.
A simpler solution toward reducing such thrust is desir-,
able.
Among the objects of the present invention are:
1. To provide a novel and improved jet pump assemy;
2. To provide a novel and improved jet pump assembly in which galling or balling up of the wear-ring is atfectively eliminated;
3. To provide a novel and improved jet pump assembly wherein reduction of thrust on the discharge end of the impeller is achieved in a novel manner;
4. To provide a novel and improved jet pump assembly wherein the wear-ring may be installed or replaced simply and quickly;
5. To provide a novel and improved wear-ring for a jet pump assembly; and
6. To provide a novel and improvedmethod-of installing a wear-ring in a jet pump assembly.
Additional objects of the invention will be brought out in the following description of a preferred embodiment of the same, taken in conjunction with the accompanying drawings wherein,
FIG. I is a general view in phantom through a-jet pump assembly in which the present invention is incorporated;
FIG. 2 is an enlarged view in section through the impeller and nozzle portion of the jet pump assembly of FIG. 1, taken in the planes 2-2 of FIG. 3;
FIG. 3 is a view in sectiontaken in the plane 3-3 of FIG. 2, with the impeller removed; and
FIG. 4 is a view in section taken through the thrust bearing region of the jet pump assembly of FIG. 1.
Referring to the drawings for details of the invention in its preferred form the jet pump assembly depicted in FIG. 1, involves a suction piece 1, a bowl 3 bolted thereto and terminating in a jet nozzle 5, the suction piece curving downwardly to the bottom of the boat in which it is to be installed, where it is exposed to the water beneath the boat for intake to the pump.
An impeller 7 within the bowl is mounted on a shaft 9 which is supported at the discharge side of the impeller in a generally conical shaped hub 11 symmetrically located in the bowl and nozzle by radial vanes 13 which serves the added function of stabilizing flow of water from the impeller to the nozzle.
At its other end, the impeller shaft is supported in a thrust bearing assembly 17 installed in a housing 19 formed on the outer wall of the suction piece, said bearing assembly including a bearing 18.
Where the suction piece and the bowl are joined, as by a plurality of peripheral bolts 21, these two components are internally recessed to provide for reception of a wear-ring 23, and a pair of opposing shoulders 25, 27,
between which the wear-ring may be clamped as the suction piece and bowl are bolted together.
To facilitate installation of the wear-ring and assure proper alignment, the wear-ring is provided with a plurality of peripherally spaced dowels 29, preferably in the surface facing the suction piece, the dowels to be received in a corresponding number of holes similarly spaced about the periphery of the suction piece.
Of considerable importance to the present invention, is the fact, that the wear-ring, instead of being fabricated of metal, in accordance with prior practice, is now fabricated of non-metallic material, and preferably molded from plastic, such for example, as polypropylene, as it has been discovered that, should the blade edges of an impeller engage a wear-ring when made of such material, the material will either give or wear or both give and wear, and will not gall or ball up.
It has also been discovered that, when using such material, the accidental introduction of a stone or large gravel between the peripheral edge of an impeller and the wear-ring, will not cause the impeller to stall or freeze, as might conceivably be the case, were the wear-ring made of metal.
In a prior art conventional jet pump propulsion assembly, the edges of the impeller blades angle toward the intake side, and the suction piece and bowl in the region of the impeller, will have their internal surfaces correspondingly angled. Consequently the wear-ring will be molded with its inner surface contoured to the substantially conical surface generated by the peripheral edges of the impeller blades when in rotation.
Because the impeller can now rotate without galling or balling up of the wear-ring when in contact with the wear-ring, the wear-ring is so dimensioned and the iminto a rotatably supported socket 31, and the thrust bearing housing 19 comprises a portion 33 integral with the suction piece and an end portion 35 overlapping the socket, with the intervening space closed off by a seal 37, permitting limited longitudinal adjustment of this end portion. A retaining ring 39 installed in the outer race of the bearing 18 extends between the two portions of the housing.
By adding shims 41 between the fixed portion of the bearing housing and the retaining ring, the impeller shaft and impeller can be adjustably shifted to the right as viewed in FIGS. 2 and 4.
With an arrangement as described, the impeller is initially adjusted by installing the number of shims necessary to effect a wearing in of the wear-ring. In view of the nature of the wear-ring material the initial adjustment should suffice, but should a subsequent adjustment be deemed necessary, additional shims may be added to accomplish such subsequent adjustment.
To reduce thrust on the thrust bearing via the impeller, the hub 11 is recessed adjacent the pressure side of the impeller, such recess joining a plurality of cavities 43 formed in the hub, with each cavity flow connected with a low pressure region in the nozzle by a connecting flow passage 45 formed in the hub.
In the hub recess is disposed at shallow cup 47 of plastic or other suitable non-metallic material, such shallow cup being secured by machine screws 49 into the hub partitions 51 formed between the cavities.
The hub of the impeller is dimensioned to rotatably fit into this shallow cup, thrust pressure being developed along the edge of the cup. Due to the flow connection established between the inside of the shallow cup and the low pressure region of the nozzle, a pressure differential will develop across that portion of the impeller hub entering the shallow cup. Inasmuch as the fit between the impeller hub and the shallow cup is a rotational fit and not a leak tight joint, a limited flow of water will occur from the impeller hub to the nozzle via the chambers 43, thereby reducing the thrust against the impeller hub, with a consequent reduction in thrust against the thrust bearing.
While I have described the invention in its preformed form and in considerable detail, the same is subject to alteration and modification without departing from the underlying principles involved, and I accordingly do not desire to be limited in my protection to the details set forth except as may be necessitated by the appended claims.
I claim:
1. In a jet propulsion pump assembly having a suction piece and a bowl terminating in a nozzle, a conical shaped hub support for an impeller assembly disposed axially of said bowl and connected to said bowl by a plurality of vanes to determine passages to said nozzle, a thrust bearing supported within said suction piece, an impeller assembly in said bowl supported by and between said hub support and said thrust bearing, said impeller assembly including an impeller having blades with their remote edges such as to generate a substantially conical surface at an angle to the axis of said impeller, a wear-ring installed between said suction piece and bowl in line with said blade edges, said wear-ring having an interior surface contoured to the surface generated by the remote edges of said impeller blades, and means for clamping said wear-ring between said suction piece and said bowl with said interior surface in proximity to said blade edges, said clamping means being independent of said wear-ring.
2. In a jet propulsion pump assembly in accordance with claim 1, characterized by said wear-ring being of a non-metallic material.
3. In a jet propulsion pump assembly in accordance with claim 1, characterized by said wear-ring having a plurality of dowels extending therefrom in matching relationship to a plurality of holes in an adjacent component of said pump assembly, whereby said wear-ring may readily be assembled thereto, and removed therefrom for replacementupon unclamping of said independent clamping means.
4. In a jet propulsion pump in accordance with claim 1, characterized by said wear-ring being of plastic.
=0: a: a: :u
Claims (4)
1. In a jet propulsion pump assembly having a suction piece and a bowl terminating in a nozzle, a conical shaped hub support for an impeller assembly disposed axially of said bowl and connected to said bowl by a plurality of vanes to determine passages to said nozzle, a thrust bearing supported within said suction piece, an impeller assembly in said bowl supported by and between said hub support and said thrust bearing, said impeller assembly including an impeller having blades with their remote edges such as to generate a substantially conical surface at an angle to the axis of said impeller, a wear-ring installed between said suction piece and bowl in line with said blade edges, said wear-ring having an interior surface contoured to the surface generated by the remote edges of said impeller blades, and means for clamping said wear-ring between said suction piece and said bowl with said interior surface in proximity to said blade edges, said clamping means being independent of said wear-ring.
2. In a jet propulsion pump assembly in accordance with claim 1, characterized by said wear-ring being of a non-metallic material.
3. In a jet propulsion pump assembly in accordance with claim 1, characterized by said wear-ring having a plurality of dowels extending therefrom in matching relationship to a plurality of holes in an adjacent component of said pump assembly, whereby said wear-ring may readily be assembled thereto, and removed therefrom for replacement upon unclamping of said independent clamping means.
4. In a jet propulsion pump in accordance with claim 1, characterized by said wear-ring being of plastic.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US20913871A | 1971-12-17 | 1971-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3756741A true US3756741A (en) | 1973-09-04 |
Family
ID=22777501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00209138A Expired - Lifetime US3756741A (en) | 1971-12-17 | 1971-12-17 | Jet propulsion pump assembly |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3756741A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3799128A (en) * | 1973-03-08 | 1974-03-26 | Gen Motors Corp | Engine cooling system radiator and fan shroud |
| US4349313A (en) * | 1979-12-26 | 1982-09-14 | United Technologies Corporation | Abradable rub strip |
| US4509925A (en) * | 1982-06-01 | 1985-04-09 | Sulzer-Escher Wyss Gmbh | Marine vessel propeller with nozzle |
| US4583913A (en) * | 1983-10-03 | 1986-04-22 | Kawasaki Jukogyo Kabushiki Kaisha | Liner of a semi-axial flow pump |
| US5332355A (en) * | 1992-12-07 | 1994-07-26 | Pamela Kittles | Impelling apparatus |
| US5494633A (en) * | 1988-08-29 | 1996-02-27 | Oblander; M. Duane | Method of manufacturing a polyurethane wear ring |
| DE19613374A1 (en) * | 1996-04-03 | 1997-10-09 | Emu Unterwasserpumpen Gmbh | Water recirculation pump for water purification plant |
| US5759074A (en) * | 1996-09-25 | 1998-06-02 | Brunswick Corporation | Impeller mounting system for a personal watercraft |
| US6682298B2 (en) | 2002-05-17 | 2004-01-27 | David George Demontmorency | Rotating shaft confinement system |
| US20100183432A1 (en) * | 2007-06-27 | 2010-07-22 | Moenk Thomas | Nose dome for a turbomachine rotor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3227418A (en) * | 1963-11-04 | 1966-01-04 | Gen Electric | Variable clearance seal |
| US3249083A (en) * | 1963-12-16 | 1966-05-03 | Outboard Marine Corp | Marine jet propulsion |
| US3250069A (en) * | 1963-11-04 | 1966-05-10 | Berkeley Pump Company | Fluid take-off from turbine pump for cooling systems |
| US3405526A (en) * | 1967-03-01 | 1968-10-15 | Twin Disc Inc | Multiple stage, hydraulic jet propulsion apparatus for water craft |
| US3603599A (en) * | 1970-05-06 | 1971-09-07 | Gen Motors Corp | Cooled seal |
| US3656862A (en) * | 1970-07-02 | 1972-04-18 | Westinghouse Electric Corp | Segmented seal assembly |
-
1971
- 1971-12-17 US US00209138A patent/US3756741A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3227418A (en) * | 1963-11-04 | 1966-01-04 | Gen Electric | Variable clearance seal |
| US3250069A (en) * | 1963-11-04 | 1966-05-10 | Berkeley Pump Company | Fluid take-off from turbine pump for cooling systems |
| US3249083A (en) * | 1963-12-16 | 1966-05-03 | Outboard Marine Corp | Marine jet propulsion |
| US3405526A (en) * | 1967-03-01 | 1968-10-15 | Twin Disc Inc | Multiple stage, hydraulic jet propulsion apparatus for water craft |
| US3603599A (en) * | 1970-05-06 | 1971-09-07 | Gen Motors Corp | Cooled seal |
| US3656862A (en) * | 1970-07-02 | 1972-04-18 | Westinghouse Electric Corp | Segmented seal assembly |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3799128A (en) * | 1973-03-08 | 1974-03-26 | Gen Motors Corp | Engine cooling system radiator and fan shroud |
| US4349313A (en) * | 1979-12-26 | 1982-09-14 | United Technologies Corporation | Abradable rub strip |
| US4509925A (en) * | 1982-06-01 | 1985-04-09 | Sulzer-Escher Wyss Gmbh | Marine vessel propeller with nozzle |
| US4583913A (en) * | 1983-10-03 | 1986-04-22 | Kawasaki Jukogyo Kabushiki Kaisha | Liner of a semi-axial flow pump |
| US5494633A (en) * | 1988-08-29 | 1996-02-27 | Oblander; M. Duane | Method of manufacturing a polyurethane wear ring |
| US5332355A (en) * | 1992-12-07 | 1994-07-26 | Pamela Kittles | Impelling apparatus |
| DE19613374A1 (en) * | 1996-04-03 | 1997-10-09 | Emu Unterwasserpumpen Gmbh | Water recirculation pump for water purification plant |
| DE19613374C2 (en) * | 1996-04-03 | 1999-01-21 | Emu Unterwasserpumpen Gmbh | Recirculation pump |
| US5759074A (en) * | 1996-09-25 | 1998-06-02 | Brunswick Corporation | Impeller mounting system for a personal watercraft |
| US6682298B2 (en) | 2002-05-17 | 2004-01-27 | David George Demontmorency | Rotating shaft confinement system |
| US20100183432A1 (en) * | 2007-06-27 | 2010-07-22 | Moenk Thomas | Nose dome for a turbomachine rotor |
| US8545174B2 (en) * | 2007-06-27 | 2013-10-01 | Siemens Aktiengesellschaft | Nose dome for a turbomachine rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: JACUZZI INC., 11511 NEW BENTON HIGHWAY, LITTLE ROC Free format text: NUNC PRO TUNC ASSIGNMENT;ASSIGNORS:JACUZZI WHIRLPOOL BATH, INC.;JACUZZI BROS., INC.;REEL/FRAME:003873/0510;SIGNING DATES FROM 19810424 TO 19810508 |
|
| AS | Assignment |
Owner name: JACUZZI INC., A DELAWARE CORPORATION, CALIFORNIA Free format text: NUNC PRO TUNC ASSIGNMENT;ASSIGNOR:JACUZZI INC., A FORMER DELAWARE CORPORATION;REEL/FRAME:009866/0373 Effective date: 19880402 |
|
| AS | Assignment |
Owner name: JACUZZI INC., CALIFORNIA Free format text: NUNC PRO TUNC ASSIGNMENT EFFECTIVE AS OF 6-30-98;ASSIGNOR:JACUZZI INC.( A FORMER DELAWARE CORPORATION);REEL/FRAME:010061/0874 Effective date: 19990225 |