US20070178778A1 - Exhaust for outboard jet propulsion engine - Google Patents
Exhaust for outboard jet propulsion engine Download PDFInfo
- Publication number
- US20070178778A1 US20070178778A1 US11/641,460 US64146006A US2007178778A1 US 20070178778 A1 US20070178778 A1 US 20070178778A1 US 64146006 A US64146006 A US 64146006A US 2007178778 A1 US2007178778 A1 US 2007178778A1
- Authority
- US
- United States
- Prior art keywords
- bucket
- housing
- exhaust
- boat
- jet drive
- 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.)
- Abandoned
Links
Images
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
- B63H11/10—Marine propulsion by water jets the propulsive medium being ambient water having means for deflecting jet or influencing cross-section thereof
- B63H11/107—Direction control of propulsive fluid
- B63H11/11—Direction control of propulsive fluid with bucket or clamshell-type reversing means
Definitions
- This invention is related to an exhaust for an outboard jet propulsion engine, and in particular, a bucket for exhausting the water jet when driving the associated craft in the reverse direction.
- a prior art bucket assembly generally indicated as 10 includes bucket housing 12 adapted to be mounted downstream of the water jet exhaust of the jet drive unit.
- a bucket 14 is rotatably mounted on bucket housing 12 so as to selectively close a first exhaust at an exit end of bucket housing 12 as seen in FIG. 2A .
- the jet exiting the jet drive unit hits upon an interior surface 16 ( FIG. 1A ) of bucket 14 , the water is blocked from exiting the first exhaust and is deflected through exhaust plenum 22 on either side of bucket 14 .
- Plenums 22 extend from bucket 14 and are in communication with the interior of bucket 14 on either side of bucket 14 (see FIGS. 1A and 3A ) to also provide an escape for water deflected against interior back surface 16 of bucket 14 .
- the exhausts of plenum 22 are substantially coextensive with the bucket and exhaust water in a direction generally back and towards the lower surface of housing 12 when bucket 14 is in the closed position. In this way, water is pushed back towards the boat having a net effect of pushing the boat in the reverse direction.
- FIG. 1A is a front perspective view of a bucket assembly constructed in accordance with the prior art
- FIG. 1B is the comparable perspective view of a bucket assembly constructed in accordance with the invention.
- FIG. 2A is a side elevational view of a bucket assembly constructed in accordance with the prior art
- FIG. 2B is the comparable elevational view of a bucket assembly constructed in accordance with the invention.
- FIG. 3A is a front perspective view showing a prior art bucket assembly
- FIG. 3B is a comparable front perspective view of a bucket assembly constructed in accordance with the invention.
- FIG. 4A is a rear elevational view of a prior art bucket assembly in the closed position
- FIG. 4B is a rear elevational view of a bucket assembly constructed in accordance with the invention in the closed position
- FIG. 5 is a side elevational view of a bucket assembly mounted on a jet propulsion engine in a substantially open position constructed in accordance with the invention
- FIG. 6 is a rear perspective view of the housing and bucket assembly, constructed in accordance with the invention.
- FIG. 7 is a side elevational view of the bucket assembly constructed in accordance with the invention in the open position
- FIG. 8 is a first side elevational view of a housing and bucket assembly constructed in accordance with another embodiment of the invention.
- FIG. 9 is a rear elevational view of the housing and bucket assembly in the closed position constructed in accordance with the invention of FIG. 8 ;
- FIG. 10 is front elevational view of a housing and bucket assembly in the closed position constructed in accordance with the invention of FIG. 8 ;
- FIG. 11 is a bottom plan view of the housing and bucket assembly in the closed position constructed in accordance with the invention of FIG. 8 ;
- FIG. 12 is a top plan view of the bucket assembly in the closed position constructed in accordance with the invention of FIG. 8 ;
- FIG. 13 is a side elevational view of the opposite side of bucket assembly in a closed position constructed in accordance with the invention of FIG. 8 ;
- FIG. 14 is a sectional view taken along line 14 - 14 of FIG. 8 .
- FIG. 15 is a first side elevational view of a housing and bucket assembly in the open position constructed in accordance with the invention of FIG. 8 .
- Bucket assembly 100 includes a bucket housing 104 .
- a bucket 102 is rotatably mounted on bucket housing 104 .
- Bucket housing 104 is in communication with a water exhaust of the jet propulsion engine so as to receive water existing the water exhaust (not shown).
- Bucket housing 104 has an entrance port 106 and a first exhaust 108 ( FIG. 7 ), seen at an opposed end of housing 104 for allowing water to exit bucket housing 104 when bucket 102 is in the open position.
- An exhaust assembly generally indicated as 110 , provides a second exhaust.
- the exhaust assembly 110 has a first vent 112 and a second vent 114 .
- Vent 112 extends along a first axis and vent 114 extends along a second access so that the first axis intersects the second axis, i.e. vent 114 is angled relative to vent 112 .
- When bucket 102 blocks water from exiting exhaust 108 it also places vents 114 , 112 are in communication with the interior of bucket housing 104 to allow water to exit when bucket 102 is in the closed position.
- a bucket linkage 124 is connected to bucket 102 .
- a reverse cable 126 which controls linkage 124 , rotates bucket 102 to a first position in which bucket 102 is open ( FIG. 5 , FIG. 6 ) to allow water to pass through exit port 108 .
- Linkage 124 also controls bucket 102 to move in a direction to close exit port 108 and redirect the water path through first and second vents 112 , 114 of bucket housing 104 to guide the water in a direction substantially back towards the jet propulsion engine housing 202 .
- bucket housing 104 has a substantially circular body. Vents 112 , 114 are disposed along the circumference of bucket housing 104 , away from a bottom 140 of bucket housing 104 and on opposed sides of a pivot axis 119 extending through bucket housing 104 .
- vent 112 and vent 114 should be sufficient to divert water at an angle to flow around a boat to which exhaust assembly 110 is attached.
- the angle formed by the intersection of the axes along which vents 112 and 114 lie is about 34°. Accordingly, in the closed position, water enters bucket housing 104 in a direction towards bucket 102 . When in the closed position, water is deflected by bucket 102 substantially reversing direction out through first and second vents 112 , 114 . When in the open position, water will flow directly through exit port 108 of bucket housing 104 .
- Bucket 102 is substantially curved so as to be convex ( FIG. 4 ) providing room for water traveling through bucket housing 104 to travel towards first and second vents 112 , 114 as well as providing a surface which facilitates the substantially unimpeded deflection of water in the reverse direction; namely the convex curve.
- First and second vents 112 , 114 are in fluid communication with each other when bucket 102 is in the closed position. Accordingly, if during tight maneuvers either one of first and second vents 112 , 114 becomes closed against the jet unit structure, the pressure of the water exiting the unblocked vent is increased. In this way, thrust sufficient to perform the tight maneuver is maintained. In this way, the jet propulsion engine is self-adjusting.
- bucket 102 includes a first plenum 130 and a second plenum 132 in communication with the interior of bucket housing 120 to provide a third exhaust for the water jet when bucket 102 is in the closed position.
- Plenums 130 , 132 preferably extend a length between extending beyond bucket 102 and to at least a bottom surface 140 of bucket housing 104 when the housing is in a closed position.
- Plenums 130 , 132 substantially reside in a plane.
- Secondary exhausts 112 , 114 substantially reside in a second plan, the first plane intersecting the second plane at a substantially obtuse angle. In this way, the water exiting the plenums 130 , 132 and the secondary events avoid housing 200 .
- the jet remains more cohesive as it exits plenum 130 , 132 . Additionally, by releasing the jet at a point at least at the bottom of bucket housing 104 , the boat and/or housing are less likely to interface with the jet thrust, increasing overall thrust.
- a secondary problem is cavitation that is air bubbles being trapped in the jet stream intake.
- the air bubbles are formed from the exhaust of the engine from the housing.
- a housing for an engine for driving the jet propulsion unit as known from U.S. application Ser. No. 10/988,327 and incorporated as if fully detailed herein, generally indicated at 200 , includes sidewalls 202 . Exhausts are formed as elongated channels 204 extending along a lower portion of sidewall 202 . Channels 204 are operatively coupled to the exhaust of the engine of the jet propulsion system. In this way, the bubbles are diverted beyond the intake of the jet propulsion drive.
- FIGS. 8-15 an alternative embodiment of the invention is provided.
- the vents 112 , 114 have been replaced by an exhaust disposed within the bottom of the housing; the exhaust including vanes for directing the water.
- the bucket assembly is moved from the open to the closed position by a vertical cable 126 .
- the length of the cable to achieve maximum result, must be relatively short given the length of the entire control assembly.
- the cable length extending in the vertical direction is about three inches. Because of this small throw distance, a bucket assembly must be designed to move the entire bucket so that the entire bucket is substantially clear of the output of the water jet when the bucket is in the open position to allow propulsion of the boat in a forward direction.
- this embodiment is a more streamlined embodiment which still directs water back towards the boat to create reverse thrust but angles substantially all of the exiting water jet below the boat so as not to reduce the thrust of the water jet.
- Bucket assembly 300 includes a bucket housing 304 , a bucket 302 is rotatably mounted on bucket housing 304 .
- Bucket housing 304 is in communication with the water exhaust of the jet propulsion engine to receive water exiting the water exhaust as described above.
- Bucket housing has an entrance port 106 and an exhaust 108 at an opposite end of bucket housing 304 .
- Exhaust assembly 310 is formed with housing 304 .
- Exhaust assembly 310 includes an exhaust frame 314 and directional vanes 316 and 318 disposed within frame 314 .
- Vane 316 extends across frame 314 and is formed at an angle relative to the plane of the bottom of the boat (not shown) to form an angle of less than 90° therewith, but greater than 1° so as to direct water exiting through exhaust 310 towards the boat but below the plane in which the bottom of the boat resides.
- Frame 314 holds vanes 316 , 318 in place so that the entire venting assembly 310 form a structure which is in fluid communication with the interior of housing 304 .
- vanes 316 , 318 intersect each other and form a plurality of first plenums 340 .
- bucket 302 When bucket 302 is in the closed position, it deflects water in the direction of arrow B, as a result of its curved surface towards vanes 316 , 318 ( FIG. 14 ). Because of the curved surface of bucket 302 , water traveling in the direction of arrow B does not interfere with water traveling in the direction of arrow A reducing turbulence and providing greater efficiency of thrust out of the bucket assembly in the direction substantially of arrow C back towards the boat and down. In this way, the jet stream used to propel in the reverse direction does not interfere with the boat. Additionally, water is directed to the sides of the plenum (into the page and out of the page of FIG. 14 ) to exit through first plenum 330 and a second plenum 332 .
- Bucket 302 includes a second plenum and a third plenum 332 in communication with the interior of the bucket housing 304 to provide a third exhaust for the water jet when bucket 302 is in the closed position.
- Plenum 330 , 332 extend to be at least coextensive with the bucket 302 but a preferred embodiment extends a distance from beyond bucket 302 to at least a bottom surface 346 , each plenum 330 , 332 has respective exhaust opening 352 , 354 .
- plenums 330 , 332 are tapered towards exhaust 352 , 354 .
- plenums 330 , 332 are formed at an angle relative to a bottom 346 of housing 304 to direct water existing plenum exhaust 352 , 354 towards the boat hull but down to avoid the jet from being deflected against the boat hull.
- plenums 330 , 332 are formed of an outer wall 360 of bucket assembly 302 .
- a front wall 362 which may be formed of a single unitary piece across the entire bucket assembly 302 or individual pieces, and an interior sidewall 364 which slides along frame 314 (however, the outer wall of frame 314 may also be used to form a wall of the plenum). It is this entire assembly which is lifted when bucket 302 is in the open position as shown in FIG. 15 .
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Exhaust Silencers (AREA)
Abstract
An outboard jet drive marine system for a boat comprises a bucket assembly adapted to be mounted to a jet drive unit for receiving a water exhaust from a jet drive unit. The bucket assembly has a bucket housing. The bucket housing has a first exhaust, and at least a second exhaust. The second exhaust directs the water jet in a direction towards and beneath the boat. The bucket housing has an entrance port for receiving said water exhaust. A bucket is rotatably mounted on the bucket housing at the first exhaust and is rotatable relative to the first exhaust between an open position and a closed position. The bucket deflects water entering the entrance port to the at least a second exhaust when in a closed position.
Description
- This Application is a Non-Prov of Prov (35 USC 119(e)) application of Provisional Application No. 60/751,700 filed on Dec. 19, 2005.
- This invention is related to an exhaust for an outboard jet propulsion engine, and in particular, a bucket for exhausting the water jet when driving the associated craft in the reverse direction.
- It is known in the art to utilize an outboard jet propulsion engine to drive a boat. As known from applicant's co-pending U.S. application Ser. No. 10/988,327, filed Sep. 14, 2005 entitled OUTBOARD JET DRIVE MARINE PROPULSION SYSTEM (the “327 application”) water is driven through a housing, the force of the exiting jet of water moving the boat in the forward direction. A bucket assembly is mounted at the jet exhaust so as to selectively move from a first position to a second position between covering the exhaust and keeping clear of the exhaust. As the bucket assembly covers an exiting water jet, it diverts the direction of the water jet to move the boat in the reverse direction.
- Making reference to
FIGS. 1A and 4A , a prior art bucket assembly generally indicated as 10 includesbucket housing 12 adapted to be mounted downstream of the water jet exhaust of the jet drive unit. Abucket 14 is rotatably mounted onbucket housing 12 so as to selectively close a first exhaust at an exit end ofbucket housing 12 as seen inFIG. 2A . As the jet exiting the jet drive unit hits upon an interior surface 16 (FIG. 1A ) ofbucket 14, the water is blocked from exiting the first exhaust and is deflected throughexhaust plenum 22 on either side ofbucket 14. -
Plenums 22 extend frombucket 14 and are in communication with the interior ofbucket 14 on either side of bucket 14 (seeFIGS. 1A and 3A ) to also provide an escape for water deflected againstinterior back surface 16 ofbucket 14. The exhausts ofplenum 22, are substantially coextensive with the bucket and exhaust water in a direction generally back and towards the lower surface ofhousing 12 whenbucket 14 is in the closed position. In this way, water is pushed back towards the boat having a net effect of pushing the boat in the reverse direction. - This structure has been satisfactory for reversing the boat under the control of a jet propulsion engine. However, it suffers from the disadvantage that power is lost when the engine is required to make tight turns in the reverse direction; particularly in the type of movements required by a tugboat, i.e., tight quick turns under high power. As known from the '327 application, steering of a boat utilizing the jet propulsion engine is accomplished by moving the direction of the jet, i.e., movement of the bucket and exhaust port about a
pivot point 30 relative to the remainder of the housing or the boat. During tight maneuvers, one ofplenums 22 became blocked by the structure of the boat, reducing the effective power of the engine. Additionally, waterjets exiting plenums 22 quickly lost their cohesion and in effect their power. - Furthermore, it was discovered that the gas exhaust from the engine housed within the jet propulsion housing was producing bubbles as it exited the housing, which was interfering the optimal operation of the jet engine as a result of cavitation.
- Accordingly, an improved bucket assembly and exhaust system is desired which overcomes the deficiencies of the prior art.
- Objects, features of the present invention will be apparent from the written description in which:
-
FIG. 1A is a front perspective view of a bucket assembly constructed in accordance with the prior art; -
FIG. 1B is the comparable perspective view of a bucket assembly constructed in accordance with the invention; -
FIG. 2A is a side elevational view of a bucket assembly constructed in accordance with the prior art; -
FIG. 2B is the comparable elevational view of a bucket assembly constructed in accordance with the invention; -
FIG. 3A is a front perspective view showing a prior art bucket assembly; -
FIG. 3B is a comparable front perspective view of a bucket assembly constructed in accordance with the invention; -
FIG. 4A is a rear elevational view of a prior art bucket assembly in the closed position; -
FIG. 4B is a rear elevational view of a bucket assembly constructed in accordance with the invention in the closed position; -
FIG. 5 is a side elevational view of a bucket assembly mounted on a jet propulsion engine in a substantially open position constructed in accordance with the invention; -
FIG. 6 is a rear perspective view of the housing and bucket assembly, constructed in accordance with the invention; -
FIG. 7 is a side elevational view of the bucket assembly constructed in accordance with the invention in the open position; -
FIG. 8 is a first side elevational view of a housing and bucket assembly constructed in accordance with another embodiment of the invention; -
FIG. 9 is a rear elevational view of the housing and bucket assembly in the closed position constructed in accordance with the invention ofFIG. 8 ; -
FIG. 10 is front elevational view of a housing and bucket assembly in the closed position constructed in accordance with the invention ofFIG. 8 ; -
FIG. 11 is a bottom plan view of the housing and bucket assembly in the closed position constructed in accordance with the invention ofFIG. 8 ; -
FIG. 12 is a top plan view of the bucket assembly in the closed position constructed in accordance with the invention ofFIG. 8 ; -
FIG. 13 is a side elevational view of the opposite side of bucket assembly in a closed position constructed in accordance with the invention ofFIG. 8 ; -
FIG. 14 is a sectional view taken along line 14-14 ofFIG. 8 . and -
FIG. 15 is a first side elevational view of a housing and bucket assembly in the open position constructed in accordance with the invention ofFIG. 8 . - Reference is made to
FIGS. 1B, 2B , 3B and 4B in which a bucket assembly, generally indicated as 100, is shown.Bucket assembly 100 includes abucket housing 104. Abucket 102 is rotatably mounted onbucket housing 104.Bucket housing 104 is in communication with a water exhaust of the jet propulsion engine so as to receive water existing the water exhaust (not shown).Bucket housing 104 has anentrance port 106 and a first exhaust 108 (FIG. 7 ), seen at an opposed end ofhousing 104 for allowing water to exitbucket housing 104 whenbucket 102 is in the open position. - An exhaust assembly, generally indicated as 110, provides a second exhaust. The
exhaust assembly 110 has afirst vent 112 and asecond vent 114.Vent 112 extends along a first axis and vent 114 extends along a second access so that the first axis intersects the second axis, i.e.vent 114 is angled relative to vent 112. Whenbucket 102 blocks water from exitingexhaust 108, it also placesvents bucket housing 104 to allow water to exit whenbucket 102 is in the closed position. - A
bucket linkage 124 is connected tobucket 102. Areverse cable 126 which controlslinkage 124, rotatesbucket 102 to a first position in whichbucket 102 is open (FIG. 5 ,FIG. 6 ) to allow water to pass throughexit port 108.Linkage 124 also controlsbucket 102 to move in a direction to closeexit port 108 and redirect the water path through first andsecond vents bucket housing 104 to guide the water in a direction substantially back towards the jetpropulsion engine housing 202. - In a preferred embodiment,
bucket housing 104 has a substantially circular body.Vents bucket housing 104, away from abottom 140 ofbucket housing 104 and on opposed sides of apivot axis 119 extending throughbucket housing 104. - The angle formed between
vent 112 and vent 114 should be sufficient to divert water at an angle to flow around a boat to whichexhaust assembly 110 is attached. In a preferred non-limiting embodiment, the angle formed by the intersection of the axes along which vents 112 and 114 lie is about 34°. Accordingly, in the closed position, water entersbucket housing 104 in a direction towardsbucket 102. When in the closed position, water is deflected bybucket 102 substantially reversing direction out through first andsecond vents exit port 108 ofbucket housing 104. -
Bucket 102 is substantially curved so as to be convex (FIG. 4 ) providing room for water traveling throughbucket housing 104 to travel towards first andsecond vents - First and
second vents bucket 102 is in the closed position. Accordingly, if during tight maneuvers either one of first andsecond vents - Furthermore,
bucket 102 includes afirst plenum 130 and asecond plenum 132 in communication with the interior of bucket housing 120 to provide a third exhaust for the water jet whenbucket 102 is in the closed position.Plenums bucket 102 and to at least abottom surface 140 ofbucket housing 104 when the housing is in a closed position. -
Plenums Secondary exhausts plenums housing 200. - Furthermore, as the result of the longer plenum run, the jet remains more cohesive as it exits
plenum bucket housing 104, the boat and/or housing are less likely to interface with the jet thrust, increasing overall thrust. - A secondary problem is cavitation that is air bubbles being trapped in the jet stream intake. The air bubbles are formed from the exhaust of the engine from the housing.
- Reference is now made to
FIG. 7 in which structure for diverting air bubbles in accordance with another embodiment of the invention is provided. A housing for an engine for driving the jet propulsion unit as known from U.S. application Ser. No. 10/988,327 and incorporated as if fully detailed herein, generally indicated at 200, includessidewalls 202. Exhausts are formed aselongated channels 204 extending along a lower portion ofsidewall 202.Channels 204 are operatively coupled to the exhaust of the engine of the jet propulsion system. In this way, the bubbles are diverted beyond the intake of the jet propulsion drive. - Reference is now made to
FIGS. 8-15 in which an alternative embodiment of the invention is provided. The primary difference between the bucket assembly shown in this embodiment and those shown inFIGS. 1B-7 , is that thevents vertical cable 126. However, it has been determined that in a preferred embodiment, the length of the cable, to achieve maximum result, must be relatively short given the length of the entire control assembly. In a preferred embodiment, the cable length extending in the vertical direction is about three inches. Because of this small throw distance, a bucket assembly must be designed to move the entire bucket so that the entire bucket is substantially clear of the output of the water jet when the bucket is in the open position to allow propulsion of the boat in a forward direction. - Furthermore, to reduce draft on the boat, it is desirable to have a venting mechanism for the housing which is not disposed on the outside of the housing as with
vents - Reference is now had to another embodiment of the bucket assembly, generally indicated as 300 and constructed in accordance with the invention. Like structure is indicated by like numerals for ease of description.
Bucket assembly 300 includes abucket housing 304, abucket 302 is rotatably mounted onbucket housing 304.Bucket housing 304 is in communication with the water exhaust of the jet propulsion engine to receive water exiting the water exhaust as described above. Bucket housing has anentrance port 106 and anexhaust 108 at an opposite end ofbucket housing 304. - An exhaust assembly, generally indicated as 310 is formed with
housing 304.Exhaust assembly 310 includes anexhaust frame 314 anddirectional vanes frame 314.Vane 316 extends acrossframe 314 and is formed at an angle relative to the plane of the bottom of the boat (not shown) to form an angle of less than 90° therewith, but greater than 1° so as to direct water exiting throughexhaust 310 towards the boat but below the plane in which the bottom of the boat resides.Frame 314 holdsvanes entire venting assembly 310 form a structure which is in fluid communication with the interior ofhousing 304. As seen inFIG. 14 ,vanes first plenums 340. - During operation, water flows in the direction of arrow A through
housing 304. Whenbucket 302 is in the closed position, it deflects water in the direction of arrow B, as a result of its curved surface towardsvanes 316, 318 (FIG. 14 ). Because of the curved surface ofbucket 302, water traveling in the direction of arrow B does not interfere with water traveling in the direction of arrow A reducing turbulence and providing greater efficiency of thrust out of the bucket assembly in the direction substantially of arrow C back towards the boat and down. In this way, the jet stream used to propel in the reverse direction does not interfere with the boat. Additionally, water is directed to the sides of the plenum (into the page and out of the page ofFIG. 14 ) to exit throughfirst plenum 330 and asecond plenum 332. -
Bucket 302 includes a second plenum and athird plenum 332 in communication with the interior of thebucket housing 304 to provide a third exhaust for the water jet whenbucket 302 is in the closed position.Plenum bucket 302 but a preferred embodiment extends a distance from beyondbucket 302 to at least a bottom surface 346, eachplenum respective exhaust opening plenums exhaust - Like
plenums plenums housing 304 to direct water existingplenum exhaust - It should also be well understood, as shown in
FIG. 15 , whenbucket 302 is in the open position water moving in the direction of arrow A passes throughexit port 108 and does not get deflected throughplenum 340. In this way, the boat is pushed in the forward direction in accordance with the invention. - It should be noted that
plenums outer wall 360 ofbucket assembly 302. Afront wall 362 which may be formed of a single unitary piece across theentire bucket assembly 302 or individual pieces, and aninterior sidewall 364 which slides along frame 314 (however, the outer wall offrame 314 may also be used to form a wall of the plenum). It is this entire assembly which is lifted whenbucket 302 is in the open position as shown inFIG. 15 . - By providing vanes within
frame 314 at the exhaust, there is a greater surface area along the traveled path which focuses the water, cuts down on turbulence and increases the pressure of the exiting water. Similarly, by taperingplenums FIG. 14 ). Again, substantially in the direction towards, but down, relative to the boat to which the jet propulsion system is attached. - Thus, while there have been shown, described and pointed out novel features of the present invention as applied to preferred embodiments thereof, it will be understood that various omissions and substitutions and change in the form and detail are contemplated so that the disclosed invention may be made by those skilled in the art without departing from the spirit and scope of the invention. It is the intention therefore to be limited only as indicated by the scope of the claims appended hereto. It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention, which as a matter of language, might be said to fall there between.
Claims (18)
1. An outboard jet drive marine system for a boat comprising:
a bucket assembly adapted to be mounted to a jet drive unit for receiving a water exhaust from said jet drive unit, said bucket assembly having a bucket housing, said bucket housing having a first exhaust, and at least a second exhaust;
the at least second exhaust including a first vent and a second vent mounted to said bucket housing, said bucket housing having an entrance port for receiving said water exhaust, said first vent being disposed on the housing along a first axis and said second vent being disposed on the housing along a second axis, the first axis intersecting the second axis; and
a bucket rotatably mounted on said bucket housing at said first exhaust and being rotatable relative to said first exhaust between an open position and a closed position, said bucket deflecting water entering said entrance port to said first and second vents when in a closed position.
2. The outboard jet drive marine system for a boat of claim 1 , wherein said bucket housing has a bottom, the first vent and second vent being disposed along a circumference of said bucket housing away from the bottom.
3. The outboard jet drive marine system for a boat of claim 1 , further comprising a first plenum and a second plenum in communication with the interior of said bucket, said first plenum and said second plenum extending to the bottom of said bucket housing when said bucket is in the closed position.
4. The outboard jet drive marine system for a boat of claim 3 , wherein each said plenum extends at a substantially obtuse angle to said at least one of said first and second vents.
5. The outboard jet drive marine system of claim 1 , wherein said bucket causes said first vent to be in fluid communication with said second vent, when said bucket is in the closed position.
6. An outboard jet drive marine system for a boat comprising:
a housing, said housing having side walls and a bottom, said housing adapted to be affixed behind a hull of said boat;
an engine disposed within said housing, said engine having an exhaust;
a jet drive unit mounted to said housing and being operatively coupled to said engine and said housing; and
elongated grooves formed in the sidewall of said housing communicating with said exhaust and being upstream of said jet drive unit.
7. The outboard jet drive marine system of claim 6 , further comprising:
a bucket assembly adapted to be mounted to a jet drive unit for receiving a water exhaust from said jet drive unit, said bucket assembly having a bucket housing, said bucket housing having a first exhaust, and at least a second exhaust;
the at least second exhaust including a first vent and a second vent mounted to said bucket housing, said bucket housing having an entrance port for receiving said water exhaust, said first vent being disposed on the housing along a first axis and said second vent being disposed on the housing along a second axis, the first axis intersecting the second axis; and
a bucket rotatably mounted on said bucket housing at said first exhaust and being rotatable relative to said first exhaust between an open position and a closed position, said bucket deflecting water entering said entrance port to said first and second vents when in a closed position.
8. The outboard jet drive marine system for a boat of claim 7 , wherein said bucket housing has a bottom, the first vent and second vent being disposed along a circumference of said bucket housing away from the bottom.
9. The outboard jet drive marine system for a boat of claim 7 , further comprising a first plenum and a second plenum in communication with the interior of said bucket, said first plenum and said second plenum extending to the bottom of said bucket housing when said bucket is in the closed position.
10. The outboard jet drive marine system for a boat of claim 9 , wherein each said plenum extends at a substantially obtuse angle to said at least one of said first and second vents.
11. The outboard jet drive marine system of claim 7 , wherein said bucket causes said first vent to be in fluid communication with said second vent, when said bucket is in the closed position.
12. An outboard jet drive marine system for a boat comprising:
a bucket assembly adapted to be mounted to a jet drive unit for receiving a water exhaust from said jet drive unit, said bucket assembly having a bucket housing, said bucket housing having a first exhaust and at least a second exhaust, the at least second exhaust including a frame disposed within said housing and a vane disposed within said frame for directing said water exhaust towards said boat at an angle to direct the water below said boat; and
a bucket rotatably mounted on said bucket housing at said first exhaust and being rotatable between an open position and a closed position, said bucket allowing water to exit said first exhaust when in the open position and deflecting water entering said entrance port to said second exhaust when in the closed position.
13. The outboard jet drive marine system for a boat of claim 12 , wherein said vane is disposed within the said frame at an angle relative to a plane in which a bottom of said boat resides.
14. The outboard jet drive marine system for a boat of claim 12 , further comprising at least a second vane disposed within said frame and intersecting said first vane to form a plurality of plenum within said frame.
15. The outboard jet drive marine system for a boat of claim 12 , further comprising at least a second plenum communicating with the interior of said bucket, said at least second plenum extending at least to the bottom of said bucket housing when said bucket is in the closed position.
16. The outboard jet drive marine system for a boat of claim 15 , wherein each said plenum extends at a substantially obtuse angle to said frame.
17. The outboard jet drive marine system for a boat of claim 12 , wherein said bucket is convex.
18. The outboard jet drive marine system for a boat of claim 12 , wherein said at least second plenum is tapered.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2006/048409 WO2007075670A2 (en) | 2005-12-19 | 2006-12-19 | Exhaust for outboard jet propulsion engine |
US11/641,460 US20070178778A1 (en) | 2005-12-19 | 2006-12-19 | Exhaust for outboard jet propulsion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75170005P | 2005-12-19 | 2005-12-19 | |
US11/641,460 US20070178778A1 (en) | 2005-12-19 | 2006-12-19 | Exhaust for outboard jet propulsion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070178778A1 true US20070178778A1 (en) | 2007-08-02 |
Family
ID=38322676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/641,460 Abandoned US20070178778A1 (en) | 2005-12-19 | 2006-12-19 | Exhaust for outboard jet propulsion engine |
Country Status (1)
Country | Link |
---|---|
US (1) | US20070178778A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6022250A (en) * | 1996-10-17 | 2000-02-08 | Yamaha Hatsudoki Kabushiki Kaisha | Watercraft with twin jet propulsion units |
US20040058596A1 (en) * | 2001-12-13 | 2004-03-25 | Westhoff Paul E. | Reverse gate for water jet propulsion system |
-
2006
- 2006-12-19 US US11/641,460 patent/US20070178778A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6022250A (en) * | 1996-10-17 | 2000-02-08 | Yamaha Hatsudoki Kabushiki Kaisha | Watercraft with twin jet propulsion units |
US20040058596A1 (en) * | 2001-12-13 | 2004-03-25 | Westhoff Paul E. | Reverse gate for water jet propulsion system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0085035B1 (en) | A reversing means in water-jet propulsion units | |
US4019456A (en) | Marine wet exhaust system and improvements in powered marine vessel | |
US4214544A (en) | Boat thruster | |
US6227919B1 (en) | Water jet propulsion unit with means for providing lateral thrust | |
US6332816B1 (en) | Jet-propelled boat | |
SE457166B (en) | REVERSION DEVICE FOR A RADIATION OPERATOR FOR SHIP | |
US7124698B1 (en) | Auxiliary facilities for the maneuvering of submerged water jet propelled sea craft | |
US3007305A (en) | Marine propulsion apparatus | |
US6722932B2 (en) | Braking device for watercraft | |
JP2934314B2 (en) | Forward and reverse systems for marine jet propulsion units | |
US3942464A (en) | Water jet propelling apparatus for boats | |
US8206191B2 (en) | Water jet propulsion watercraft | |
US3934538A (en) | Boat propulsion system | |
US3610197A (en) | Motorboat | |
US20070178778A1 (en) | Exhaust for outboard jet propulsion engine | |
US3071101A (en) | Direction control for jet boat | |
US3543713A (en) | Propulsion unit for a vessel | |
WO2007075670A2 (en) | Exhaust for outboard jet propulsion engine | |
US6932013B1 (en) | Maneuvering of submerged waterjet propelled sea craft | |
US3611972A (en) | Ship water jet directional control and braking means | |
US4252075A (en) | Water jet propulsion system with laterally disposed reverse ports | |
US3834342A (en) | Water jet propulsion device | |
US5312275A (en) | Jet boat diverter nozzle with built-in ride plate | |
US5125470A (en) | Hovercraft | |
US3854437A (en) | Hydraulic jet stern steering control |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SWORD MARINE TECHNOLOGY, INC., FLORIDA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LAWSON, WILLIAM;REEL/FRAME:019146/0821 Effective date: 20070322 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |