CA2087203C - Seal construction for a pump of a small watercraft - Google Patents
Seal construction for a pump of a small watercraftInfo
- Publication number
- CA2087203C CA2087203C CA002087203A CA2087203A CA2087203C CA 2087203 C CA2087203 C CA 2087203C CA 002087203 A CA002087203 A CA 002087203A CA 2087203 A CA2087203 A CA 2087203A CA 2087203 C CA2087203 C CA 2087203C
- Authority
- CA
- Canada
- Prior art keywords
- flange
- pump
- seal member
- seal
- hull
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
- B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
Abstract
A seal construction for a pump of a small watercraft of the water jet propulsion type, the watercraft including a hull and a pump casing. A pumping passage for water jet propulsion is formed by the pump casing and a portion of the hull. The seal construction includes a flange formed on the pump casing, the flange having walls, and an elastic seal member liquid-tightly surrounding the periphery of the flange. The seal member has an outer periphery in liquid-tight contact with the inner surface of the hull portion where the pump is mounted. The flange and the seal member have parts for immovably engaging with each other.
Description
20~720~
Field and Background of the Invention The present invention relates to a construction for mounting a pump on a small watercraft of the water jet propulsion type.
A prior art watercraft of this type is exemplified in Fig. 1 of U.S. Patent ~4~541, ~ and lncludes a pump duct 6 connected to the wall of a recess 3 in the hull, ~6~
the connection being exposed to the air in the recess 3 Il/~g around the duct. If the connection does not form a l~
good liquid-tight seal, when the watercraft i8 gliding ~~4~ ~ ~~
on the water and has a shallow draft, air may be sucked through the connection and into the pump and cause the impeller 4 to idle. This, of course, lowers the pump performance.
~ The connection may be sealed with a flowable fluid packing, which solidifies in a predetermlne~ time but still L~- ~n~ elastic. However, such packing is sticky and therefore makes the ascembly of the part~ diffi-cult. It takes ~kill to apply the fluid p~ck~ng with a predete ' ne~ and uniform thickness to the connecting surfaces. Also, it takes time and requires an addi-tional process step to apply a fluid packing when the pump is assembled, and to replace the packing when the pump is overhauled.
Fig. 6 of the accompanying drawings shows other prior art constructions, wherein, instead of fluid packing, a rubber seal member S i9 interposed on the front end E of the pump casing, which is the connecting part. However, because the member S and part E do not have stable shapes and means for locating the member S
in place on the part E, the seal member may not be located precisely in place when the assembly is com-pleted, 90 that the seal is not completely liquid-tight.
It is an object of the present invention to pro-vide a construction for mounting a pump on a small watercraft of the water jet propulsion type, wherein the pump can be mounted with a seal member in a liquid-tight connection easily, quickly and reliably without ~kill, and wherein the ~eal member can be used again when the pump is overhauled.
Summary of the Invention According to this invention, a construction i9 provided for mounting a pump on a small watercraft of the water jet propulsion type, which includes a hull - 10 and a pump casing, and in which a pumping pas~age for ~ ;
propul8ion water i9 formed by the pump casing and a portion of the hull.
The con~truction comprises a flange formed on the pump casing, and an elastic seal member liquid-tightly lS gurrolln~; n~ the periphery of the flange. The outer periphery of the ~eal member liquid-tightly contacts the inner surface of the hull portion, at the location where the pump i9 mounted. The flange and the seal ; member inclùde means for immovably engaging with each other for locating the ~eal on the ~1ange.
, - ~rief Description of the Drawings Preferred embodiments of the invention are ~hown in the accompanying drawings, wherein:
Fig. 1 i9 a fragmentary ~ide view partially in section of a small watercraft of the water jet propul-- sion type, including a construction for mounting a pump in accordance with thi~ invention;
.,~, ~-' Fig. 2 i~ a schematic view in section taken along line 2-2 of Fig. 1, and showing Qome part~ in the 3~ process of being mounted;
Fig. 3 iQ an enlarged sectional view of part of Fig. 1;
'~
' .;i .. . .
Fig. 4 i~ an exploded perspective view of parts of the watercraft shown in Fig. l;
~", Figs. 5a-5d are enlarged fragmentary views in section showing various engaging means each between a 5 seal and a pump casing according to the invention; and Fig. 6 i~ a per~pective view ~howing parts of a prior art watercraft.
Detailed Description of the Drawings With reference to Figs. 1-4, the watercraft in-10 cludes a hull 10, only the bottom portion of which isshown. A suction duct 12 having an inlet port 13 (Fig.
Field and Background of the Invention The present invention relates to a construction for mounting a pump on a small watercraft of the water jet propulsion type.
A prior art watercraft of this type is exemplified in Fig. 1 of U.S. Patent ~4~541, ~ and lncludes a pump duct 6 connected to the wall of a recess 3 in the hull, ~6~
the connection being exposed to the air in the recess 3 Il/~g around the duct. If the connection does not form a l~
good liquid-tight seal, when the watercraft i8 gliding ~~4~ ~ ~~
on the water and has a shallow draft, air may be sucked through the connection and into the pump and cause the impeller 4 to idle. This, of course, lowers the pump performance.
~ The connection may be sealed with a flowable fluid packing, which solidifies in a predetermlne~ time but still L~- ~n~ elastic. However, such packing is sticky and therefore makes the ascembly of the part~ diffi-cult. It takes ~kill to apply the fluid p~ck~ng with a predete ' ne~ and uniform thickness to the connecting surfaces. Also, it takes time and requires an addi-tional process step to apply a fluid packing when the pump is assembled, and to replace the packing when the pump is overhauled.
Fig. 6 of the accompanying drawings shows other prior art constructions, wherein, instead of fluid packing, a rubber seal member S i9 interposed on the front end E of the pump casing, which is the connecting part. However, because the member S and part E do not have stable shapes and means for locating the member S
in place on the part E, the seal member may not be located precisely in place when the assembly is com-pleted, 90 that the seal is not completely liquid-tight.
It is an object of the present invention to pro-vide a construction for mounting a pump on a small watercraft of the water jet propulsion type, wherein the pump can be mounted with a seal member in a liquid-tight connection easily, quickly and reliably without ~kill, and wherein the ~eal member can be used again when the pump is overhauled.
Summary of the Invention According to this invention, a construction i9 provided for mounting a pump on a small watercraft of the water jet propulsion type, which includes a hull - 10 and a pump casing, and in which a pumping pas~age for ~ ;
propul8ion water i9 formed by the pump casing and a portion of the hull.
The con~truction comprises a flange formed on the pump casing, and an elastic seal member liquid-tightly lS gurrolln~; n~ the periphery of the flange. The outer periphery of the ~eal member liquid-tightly contacts the inner surface of the hull portion, at the location where the pump i9 mounted. The flange and the seal ; member inclùde means for immovably engaging with each other for locating the ~eal on the ~1ange.
, - ~rief Description of the Drawings Preferred embodiments of the invention are ~hown in the accompanying drawings, wherein:
Fig. 1 i9 a fragmentary ~ide view partially in section of a small watercraft of the water jet propul-- sion type, including a construction for mounting a pump in accordance with thi~ invention;
.,~, ~-' Fig. 2 i~ a schematic view in section taken along line 2-2 of Fig. 1, and showing Qome part~ in the 3~ process of being mounted;
Fig. 3 iQ an enlarged sectional view of part of Fig. 1;
'~
' .;i .. . .
Fig. 4 i~ an exploded perspective view of parts of the watercraft shown in Fig. l;
~", Figs. 5a-5d are enlarged fragmentary views in section showing various engaging means each between a 5 seal and a pump casing according to the invention; and Fig. 6 i~ a per~pective view ~howing parts of a prior art watercraft.
Detailed Description of the Drawings With reference to Figs. 1-4, the watercraft in-10 cludes a hull 10, only the bottom portion of which isshown. A suction duct 12 having an inlet port 13 (Fig.
4) i9 formed in the hull bottom. As shown in Figs. 1 and 3, the hull 10 and a pump bottom cover 11 bolted to it form a pump chi '-er 14, which houses a jet propul-15 ~ion pump 16 including a casing 18 and an outlet port20.
The suction duct 12 and the pump casing 18 are interconnected to form a pumping passage 22 extending from the duct inlet 13 to the pump outlet 20.
The pump 16 include~ an impeller 24 coupled by a propeller drive shaft 26 to an engine (not shown) mounted in the hull to produce a propulsive force by sucking water from the inlet 13 and discharging it in a jet from the outlet 20.
When the watercraft is pl~n;ng or gliding on the water, the draft is shallow and there i9 little or no water in the pump chamber 14, and there is a negative pressure in the portion of passage 22 upstream of the impeller 24. If the connection between the duct 12 and the pump ca~ing 18 is not liquid tight, air would be sucked from the pump chamber 14 around the casing 18 through this connection into the inlet 13 and then into the pump 16. As a result, the air would cause the impeller 24 to idle and the engine would overspeed.
: :
The pump casing 18 has at its front end (the upstream end) a flange 28 substantially in the shape of an inverted U (see Figs. 2 and 4). The flange 28 widens slightly toward the bottom as shown in the end view (Fig. 2). The flange 28 has a flat top 30 (Fig.
4) formed with front and rear projections 32.
The pump casing 18 is formed with peripheral grooves 34 adjacent its front end (Fig. 4), which define part of the rear wall of the flange 28. The grooves 34 extend from the rear projection 32 substan-tially along the upper circular sides of flange 28.
The lower ends of the grooves 34 gradually become shallow and merge into the peripheral wall of,casing 18.
As shown in Fig. 4, a seal member 36 of rubber or other elastic material has a shape corresponding to the outer surface of the flange 28, and surrounds the flange 28 in a liquid-tight connection.
The seal 36 ha~ two lips 38 projecting inwardly at its front and rear edges and immovably engaging with the front and rear walls of the flange 28 and the grooves 34. Each lip 38 has a top recess 40 that engages with one projection 32 at the top of the flange 28. The seal 36 is sized and configured to fit snugly around the outer periphery of the flange 28.
When the seal 36 is ~n~l~lly placed around the flange 28, the engagement of the recesses 40 with the projections 32 distributes equivalent tensions to both right and left sides of the seal, thereby securing the placement of the seal and improving the liquid tight-ness.
The seal 36 has two outer ridges 42 (Fig. 3) on its outer periphery for a better liquid tight seal with the duct 12, and its bottom side 43 has bolt holes 44.
The seal 36 also has short legs 46 at the ends of the bottom side 43.
:
The suction duct 12 has an ~r~n~ed rear end portion 48 around and corre~ponding to the shape of the flange 28 (~ee Fig. 4), but slightly larger than the flange by the thickness of seal 36 when compressed.
The bottom side, which may be under water when the watercraft i9 gliding, of the rear portion 48 is cut away to facilitate the mounting of pump 16.
The cut-away bottom side of rear portion 48 is covered by a rear portion of a grate 50, which forms part of the hull bottom. The grate 50 is bolted by bolt8 51 to the bottom side of the flange 28 and has a liquid-tight connection through the seal 36 to the duct 12. The grate 50 has apertures or slits 52 at the duct inlet 13 to allow water to enter the duct but to pre-vent the suction of seaweeds or the like into the duct12. The seal legs 46 seal the clearances between the grate 50 and both ~ide~ of duct rear portion 48.
The grate 50 may instead be replaced by a forward extension of the pump cover 11.
If the watercraft i~ designed to pocition the seal bottom side 43 under water even when the watercraft is gliding, the side 43 need not be liquid-tight.
After the seal 36 has been placed around the flange 28, the outer ~urface of seal 36 may be wetted with water or oil to reduce frictisn during assembly.
Then, as shown in Fig. 2, the pump casing 18 i9 moved upwardly into the hull 10 and i9 bolted by bolts 54 to the upper hull 10, which forms the pump chamber 14.
- Because the flange 28 and suction duct rear por-tion 48 widen in the downward direction as stated above, the pump 16 can be easily moved into place and bolted. Also, as the parts are being bolted tFig. 2), the duct portion 48 gradually and uniformly compresses the seal 36 except for i~ bottom side 43. This im-- 35 proves the sealing.
:, :
Thus, by initially engaging the seal 36 in the predete 'ne~ relationship with the pump flange 28, the pump 16 can be mounted on the hull easily and smoothly with a perfect seal, without dislocation or drift of position. This allows one, even one who may not be skilled, t~ mount the pump easily with a highly reli-able ~eal.
When the pump is overhauled, the pump 16 can be taken off the duct 12 in the reverse order without damaging the ~eal 36, which can therefore be used again.
Fig~. 5a-5d show upper sectional views of various configurations for immovably engaging the seal with the pump ca~ing.
In Fig. 5a, the pump ca~ing 18a has an outer rectangular flange 28a. The front wall of flange 28a coincides with the front end of casing 18a. The seal 36a ha~ peripheral lips 38a engaging with the front and rea~ walls of flange 28a.
In Fig. 5b, the pump casing 18b has a flange 28b and a peripheral groove 34b, which defines part of the rear wall of flange 28b. The front wall of flange 28b : COi n~i ~es with the front end of casing 18b. The upper portion of flange 28b is flush with the casing 18b.
The seal 36b has peripheral lips 38b engaging with the front and rear walls of flange 28b and the groove 34b.
In Fig. 5c, the pump casing 18c has a flange 28c and two spaced apart peripheral grooves 34c, which each define part of the front or rear wall of flange 28c.
The upper portion of flange 28c is flush with the casing 18c. The seal 36c has peripheral lips 38c engaging with the grooves 34c.
; In Fig. 5d, the pump casing 18d has a flange 28d, ' which is spaced somewhat rearwardly from the front end , ~ ' ' ' , - ' ' ' ' ' ''" . :, .
-'- 20872~
of casing 18d. The seal 36d has peripheral lips 38d engaging with the front and rear walls of flange 28d.
Although the lower sections of the immovable engaging means of casîngs 18a-18d are not shown, they may take any of the forms shown in Figs. 5a-5d. For example, in the Figs. 1-4 embodiment, the upper section of the casing takes the form of Fig. 5b, while the lower section takes the form of Fig. 5a, and the grooves 34 gradually merge into the peripheral casing wall as explained previously. The seals shown in Figs.
5a to 5d may also have outer ridges such as the ridges 42.
:, ,~
The suction duct 12 and the pump casing 18 are interconnected to form a pumping passage 22 extending from the duct inlet 13 to the pump outlet 20.
The pump 16 include~ an impeller 24 coupled by a propeller drive shaft 26 to an engine (not shown) mounted in the hull to produce a propulsive force by sucking water from the inlet 13 and discharging it in a jet from the outlet 20.
When the watercraft is pl~n;ng or gliding on the water, the draft is shallow and there i9 little or no water in the pump chamber 14, and there is a negative pressure in the portion of passage 22 upstream of the impeller 24. If the connection between the duct 12 and the pump ca~ing 18 is not liquid tight, air would be sucked from the pump chamber 14 around the casing 18 through this connection into the inlet 13 and then into the pump 16. As a result, the air would cause the impeller 24 to idle and the engine would overspeed.
: :
The pump casing 18 has at its front end (the upstream end) a flange 28 substantially in the shape of an inverted U (see Figs. 2 and 4). The flange 28 widens slightly toward the bottom as shown in the end view (Fig. 2). The flange 28 has a flat top 30 (Fig.
4) formed with front and rear projections 32.
The pump casing 18 is formed with peripheral grooves 34 adjacent its front end (Fig. 4), which define part of the rear wall of the flange 28. The grooves 34 extend from the rear projection 32 substan-tially along the upper circular sides of flange 28.
The lower ends of the grooves 34 gradually become shallow and merge into the peripheral wall of,casing 18.
As shown in Fig. 4, a seal member 36 of rubber or other elastic material has a shape corresponding to the outer surface of the flange 28, and surrounds the flange 28 in a liquid-tight connection.
The seal 36 ha~ two lips 38 projecting inwardly at its front and rear edges and immovably engaging with the front and rear walls of the flange 28 and the grooves 34. Each lip 38 has a top recess 40 that engages with one projection 32 at the top of the flange 28. The seal 36 is sized and configured to fit snugly around the outer periphery of the flange 28.
When the seal 36 is ~n~l~lly placed around the flange 28, the engagement of the recesses 40 with the projections 32 distributes equivalent tensions to both right and left sides of the seal, thereby securing the placement of the seal and improving the liquid tight-ness.
The seal 36 has two outer ridges 42 (Fig. 3) on its outer periphery for a better liquid tight seal with the duct 12, and its bottom side 43 has bolt holes 44.
The seal 36 also has short legs 46 at the ends of the bottom side 43.
:
The suction duct 12 has an ~r~n~ed rear end portion 48 around and corre~ponding to the shape of the flange 28 (~ee Fig. 4), but slightly larger than the flange by the thickness of seal 36 when compressed.
The bottom side, which may be under water when the watercraft i9 gliding, of the rear portion 48 is cut away to facilitate the mounting of pump 16.
The cut-away bottom side of rear portion 48 is covered by a rear portion of a grate 50, which forms part of the hull bottom. The grate 50 is bolted by bolt8 51 to the bottom side of the flange 28 and has a liquid-tight connection through the seal 36 to the duct 12. The grate 50 has apertures or slits 52 at the duct inlet 13 to allow water to enter the duct but to pre-vent the suction of seaweeds or the like into the duct12. The seal legs 46 seal the clearances between the grate 50 and both ~ide~ of duct rear portion 48.
The grate 50 may instead be replaced by a forward extension of the pump cover 11.
If the watercraft i~ designed to pocition the seal bottom side 43 under water even when the watercraft is gliding, the side 43 need not be liquid-tight.
After the seal 36 has been placed around the flange 28, the outer ~urface of seal 36 may be wetted with water or oil to reduce frictisn during assembly.
Then, as shown in Fig. 2, the pump casing 18 i9 moved upwardly into the hull 10 and i9 bolted by bolts 54 to the upper hull 10, which forms the pump chamber 14.
- Because the flange 28 and suction duct rear por-tion 48 widen in the downward direction as stated above, the pump 16 can be easily moved into place and bolted. Also, as the parts are being bolted tFig. 2), the duct portion 48 gradually and uniformly compresses the seal 36 except for i~ bottom side 43. This im-- 35 proves the sealing.
:, :
Thus, by initially engaging the seal 36 in the predete 'ne~ relationship with the pump flange 28, the pump 16 can be mounted on the hull easily and smoothly with a perfect seal, without dislocation or drift of position. This allows one, even one who may not be skilled, t~ mount the pump easily with a highly reli-able ~eal.
When the pump is overhauled, the pump 16 can be taken off the duct 12 in the reverse order without damaging the ~eal 36, which can therefore be used again.
Fig~. 5a-5d show upper sectional views of various configurations for immovably engaging the seal with the pump ca~ing.
In Fig. 5a, the pump ca~ing 18a has an outer rectangular flange 28a. The front wall of flange 28a coincides with the front end of casing 18a. The seal 36a ha~ peripheral lips 38a engaging with the front and rea~ walls of flange 28a.
In Fig. 5b, the pump casing 18b has a flange 28b and a peripheral groove 34b, which defines part of the rear wall of flange 28b. The front wall of flange 28b : COi n~i ~es with the front end of casing 18b. The upper portion of flange 28b is flush with the casing 18b.
The seal 36b has peripheral lips 38b engaging with the front and rear walls of flange 28b and the groove 34b.
In Fig. 5c, the pump casing 18c has a flange 28c and two spaced apart peripheral grooves 34c, which each define part of the front or rear wall of flange 28c.
The upper portion of flange 28c is flush with the casing 18c. The seal 36c has peripheral lips 38c engaging with the grooves 34c.
; In Fig. 5d, the pump casing 18d has a flange 28d, ' which is spaced somewhat rearwardly from the front end , ~ ' ' ' , - ' ' ' ' ' ''" . :, .
-'- 20872~
of casing 18d. The seal 36d has peripheral lips 38d engaging with the front and rear walls of flange 28d.
Although the lower sections of the immovable engaging means of casîngs 18a-18d are not shown, they may take any of the forms shown in Figs. 5a-5d. For example, in the Figs. 1-4 embodiment, the upper section of the casing takes the form of Fig. 5b, while the lower section takes the form of Fig. 5a, and the grooves 34 gradually merge into the peripheral casing wall as explained previously. The seals shown in Figs.
5a to 5d may also have outer ridges such as the ridges 42.
:, ,~
Claims (4)
1. A construction for mounting a pump on a small watercraft of the water jet propulsion type, the watercraft including a hull and a pump casing, and in which a pumping passage for water jet propulsion is formed by the pump casing and a portion of the hull, the construction comprising a flange formed on the pump casing, the flange having walls, and an elastic seal member liquid-tightly surrounding the periphery of the flange, the seal member having an outer periphery in liquid-tight contact with the inner surface of the hull portion where the pump is mounted, and the flange and the seal member having means for immovably engaging with each other.
2. A construction according to Claim 1, wherein said immovably engaging means of the seal member comprises inwardly projecting lips formed on said seal member, and wherein said immovably engaging means of said flange comprises said walls, said lips engaging said flange.
3. A construction according to Claim 2, wherein said immovably engaging means of the flange further comprises at least one peripheral groove formed in said casing, the groove defining part of one of said walls.
4. A construction according to Claim 1, wherein said immovably engaging means of said flange comprises a projection extending in the forward-rearward direction, and said immovably engaging means of said seal member comprises a recess therein which receives said projection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-063,472 | 1992-03-19 | ||
| JP4063472A JP2559942B2 (en) | 1992-03-19 | 1992-03-19 | Water jet propulsion type small planing boat pump mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2087203A1 CA2087203A1 (en) | 1993-09-20 |
| CA2087203C true CA2087203C (en) | 1997-12-23 |
Family
ID=13230212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002087203A Expired - Fee Related CA2087203C (en) | 1992-03-19 | 1993-01-13 | Seal construction for a pump of a small watercraft |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5310368A (en) |
| JP (1) | JP2559942B2 (en) |
| CA (1) | CA2087203C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5713769A (en) * | 1996-09-23 | 1998-02-03 | Brunswick Corp. | Stator and nozzle assembly for jet propelled personal watercraft |
| US5759074A (en) * | 1996-09-25 | 1998-06-02 | Brunswick Corporation | Impeller mounting system for a personal watercraft |
| FR2762823B1 (en) * | 1997-04-30 | 1999-07-30 | Marcel Bellens | MOTORIZED NAUTICAL LEISURE MACHINE |
| CA2228759C (en) * | 1998-02-04 | 2003-07-01 | Bombardier Inc. | Noise reducing system |
| JP3321421B2 (en) * | 1998-10-15 | 2002-09-03 | 川崎重工業株式会社 | Mixed-flow water jet pump for planing boats |
| US6475044B1 (en) * | 2000-11-28 | 2002-11-05 | Bombardier Motor Corporation Of America | Vibration isolation for mounting water jet propulsion unit to hull |
| JP4502631B2 (en) * | 2003-11-25 | 2010-07-14 | 本田技研工業株式会社 | Fixing structure of jet propulsion pump in small ship |
| JP2006044610A (en) * | 2004-08-09 | 2006-02-16 | Kawasaki Heavy Ind Ltd | Mounting structure for water jet pump of small planing vessel |
| CN100411945C (en) * | 2006-03-30 | 2008-08-20 | 中国舰船研究设计中心 | Jet propulsion pump device for flexile mounting ship |
| CN100464103C (en) * | 2007-06-26 | 2009-02-25 | 中国舰船研究设计中心 | Vibration absorber |
| FI124117B (en) * | 2012-09-24 | 2014-03-31 | Alamarin Jet Oy | Body for a water jet unit for a boat, water jet unit and arrangement in a boat |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030599B2 (en) * | 1980-12-18 | 1985-07-17 | 川崎重工業株式会社 | Mixed flow water injection propulsion device |
| JP2698090B2 (en) * | 1988-03-17 | 1998-01-19 | 三信工業株式会社 | Water injection propulsion ship |
-
1992
- 1992-03-19 JP JP4063472A patent/JP2559942B2/en not_active Expired - Fee Related
-
1993
- 1993-01-13 CA CA002087203A patent/CA2087203C/en not_active Expired - Fee Related
- 1993-01-28 US US08/010,545 patent/US5310368A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2559942B2 (en) | 1996-12-04 |
| US5310368A (en) | 1994-05-10 |
| CA2087203A1 (en) | 1993-09-20 |
| JPH05262287A (en) | 1993-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |