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Publication numberUS3292373 A
Publication typeGrant
Publication dateDec 20, 1966
Filing dateDec 2, 1964
Priority dateDec 10, 1963
Publication numberUS 3292373 A, US 3292373A, US-A-3292373, US3292373 A, US3292373A
InventorsHiroshi Tado
Original AssigneeYanmar Diesel Engine Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Marine propulsion apparatus
US 3292373 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Dec- 20, 1965 HIROSHI TADO MARNE PROPULSION APPARATUS Filed Dec. 2, 1964 ATTORNEYS United States 3,292,373 MARINE PROPULSIUN APPARATUS Hiroshi Tado, Suita-shi, Eapan, assignor to Yanmar Diesel Engine Co., Ltd., Osaka, Japan, a corporation of Japan Fiied Dec. 2, 1964, Ser. No. 415,422 Claims priority, appiication Japan, Dec. 1t), 1963, SaS/92,180 3 Claims. (Cl. 60-221) The present invention relates to marine propulsion apparatus of the type including the combination of an engine and a water jet pump to utilize the reaction produced by jets of water for the propulsion of ships, and more particularly to `an improved structure of a mounting block for the water jet pump.

It is widely acknowledged that simplification of cooling and lubricating oil systems for the engine in marine propulsion apparatus of the type described above offers many advantages including reduction in the space occupied by the apparatus and reduction in the weight of the apparatus with attendant reduction in the cost and simplified procedure for operation. It is a common practice for the propulsion apparatus of the type to cool the engine and an associated lubricating oil cooler by water bypassing the discharge side of the water jet pump and to thereby dispense with an independent sea water circulating pump. However, with marine propulsion apparatus of the type which require an independent lubricating oil sump and an independent lubricating oil cooler, such cooling arrangement can not sufciently attain the purpose of simplification of the structure of the apparatus.

It is therefore the primary object of the present invention to provide a marine propulsion apparatus of the type described which includes therein a lubricating oil sump and a lubricating oil cooler of simplified structure.

In order to attain the above-described object, the present invention proposes a marine propulsion apparatus of the type described which comprises a mounting block fixed on a ships bottom plate for supporting thereon the water jet pump, said mounting block having a water suction port therethrough, and means for defining in said mounting block a combined lubricating oil sump and lubricating oil cooler for the engine.

The present invention also proposes a marine propulsion apparatus of the type described which comprises a mounting Iblock xed on a ships bottom plate for supporting thereon the water jet pump, said mounting block having a water suction port therethrough, a chamber provided in said mounting block and having an inlet and 1an outlet for lubricating oil so as to define a lubricating oil sump between the outer wall of said mounting block and the peripheral wall of said water suction port, and

means provided in said chamber for guiding a suitable flow of lubricating oil therethrough and tor cooling the lubricating oil by the utilization of heat exchange with water flow along the ships bottom and through the water suction port, whereby the lubricating oil sump and the lubricating oil cooler for the engine are unitarily incorporated in said mounting block for the water jet pump.

There are other objects and particularities of the present invention which will become obvious from the following descri-ption with reference to the accompanying drawings, in which:

FIG. 1 is a front elevational view in vertical section of an aft portion of a ship in which a marine propulsion apparatus consisting of an engine and a water jet pump coupled thereto is installed;

FlG. 2 is a bottom plan view of the propulsion apparatus of FIG. l when looked in the direction of arrow A in FIG. 1; and

FIG. 3 is a sectional View taken on the line B-B in FIG. l, showing the structure of a combined lubricating oil sump and lubricating oil cooler according to the present invention.

Referring to FIG. 1, there is shown the marine propulsion apparatus which consists of an engine 1 and a water jet pump 3 operatively coupled to the engine 1. The discharge port of the Water jet pump 3 extends rearwardly through a ships hull 5. The water jet pump 3 is mounted on a ships bottom plate 25 with a mounting block 7 interposed therebetween. The mounting block 7 has a water suction port 19 which is aligned with a suction aperture in the ships Ibottom plate 25 for water supply to the pump 3. A perforated screen 9 is fixed to the end edge of the water suction port of the mounting block 7 to prevent dangerous matters from flowing into the pump 3.

The mounting block 7 is made hollow so as to dene therein a lubricating oil sump 27 which has an oil inlet 11 communicating with an oil discharge port 1S of the engine 1 and an oil outlet 13 communicating with a lubricating oil pump 17, as shown in FIG. 2. Means such as a baffle plate 21 and ns 23 are provided in the lubricating oil sump 27, as shown in FIG. 3, in order to guide the unidirectional flow of lubricating oil from the inlet 11 to the outlet 13 and to increase the speed of lubricating oil iiow through the lubricating oil sump 27 relative to the speed of water ow through the suction port 19 and along the ships bottom. It will be understood that the bai-ile plate 21 and the tins 23 act also as cooling means so that the lubricating oil sump 27 can also act as a lubricating oil cooler, Thus, the present invention provides a combined lubricating oil sump and a lubricating oil cooler of simplified structure incorporated in a mounting block for the water jet pump,

What is claimed is:

1. ln a marine propulsion apparatus having an engine and a water jet pump to utilize the reaction produced by jets of water for the propulsion of ships, the improvement comprising a mounting block xed on said ships 'bottom plate for supporting thereon the water jet pump, said mounting block having a water suction port therethrough, a chamber provided in said mounting block between the outer wall of said mounting block and the peripheral wall of said water suction port, said chamber having an inlet for receiving lubricating oil fro-m said engine and an outlet for discharging lubricating oil to said engine, said chamber dening a lubricating oil sump for the engine which serves as a lubricating oil cooler for the engine.

2. In a marine propulsion apparatus having an engine and a water jet pump to utilize the reaction produced by jets of water for the propulsion of ships, the improvement comprising a mounting `block fixed on said ships bottom plate for supporting thereon the water jet pump, said mounting block having a water suction port therethrough, a chamber provided in said mounting block between the outer wall of said mounting Iblock and the peripheral wall of said water suction port, said chamber having an inlet for receiving lubricating oil from said engine and an outlet for discharging lubricating oil to said engine,

References Cited by the Examiner UNITED STATES PATENTS Fernstrurn 11S-0.5

Ruffolo 11S-0.5 Holley 123--196 X Waldron et al 1l5--0.5 Austin 11S-0.5

MARK NEWMAN, Primary Examiner.

C. R. CROYLE, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2382218 *Sep 18, 1943Aug 14, 1945Fernstrum Robert WOutboard marine heat exchanger
US2682852 *May 22, 1952Jul 6, 1954Ruffolo Mario AMarine engine cooling device
US2757650 *Nov 12, 1953Aug 7, 1956Holley Donald AThermostatic control for marine engine cooling systems
US2976834 *Dec 4, 1958Mar 28, 1961Sam SchleiferMarine heat exchanger
US3040695 *Feb 16, 1960Jun 26, 1962Buehler CorpIntake strainer
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3827392 *Jul 21, 1972Aug 6, 1974Scooter Ski LtdWater planing craft
US4237812 *Sep 28, 1978Dec 9, 1980Richardson Jerald SJet ski grating
US5330374 *Feb 16, 1993Jul 19, 1994Sanshin Kogyo Kabushiki KaishaJet propulsion system
US5433635 *May 28, 1993Jul 18, 1995Yamaha Hatsudoki Kabushiki KaishaJet plate sensor for watercraft
US5507673 *May 30, 1995Apr 16, 1996Boggia; RichardJet propelled watercraft
US5545063 *Jan 21, 1993Aug 13, 1996Haynes; Hendrick W.Chambered anti-Coanda jet marine propulsion device with gaseous boundary layer for a thrust jet flow stream exhibiting staged controlled boundary layer separation properties, vessel trim adjustment, and movable thrust vector application points(s)
US5894087 *Apr 16, 1997Apr 13, 1999Yamaha Hatsudoki Kabushiki KaishaSpeed sensor for watercraft
US6192817 *Jul 8, 1999Feb 27, 2001Andrzej DecMotorized surfboard
US6524149 *Apr 13, 1999Feb 25, 2003Yamaha Hatsudoki Kabushiki KaishaCooled oil reservoir for watercraft
US6544085 *Oct 19, 2000Apr 8, 2003Bombardier Inc.Watercraft having a closed coolant circulating system with a heat exchanger that constitutes an exterior surface of the hull
US6568340Nov 14, 2001May 27, 2003Andrzej DecMotorized wakeboard
US6869324 *Feb 3, 2003Mar 22, 2005Kawasaki Jukogyo Kabushiki KaishaSmall watercraft
US7094118 *Mar 23, 2005Aug 22, 2006Brunswick CorporationHeat exchanger for a marine propulsion system
US7128025Oct 25, 2004Oct 31, 2006Brp Us Inc.Dual temperature closed loop cooling system
US7597600Nov 1, 2007Oct 6, 2009Surfango, Inc.Engine for driving a watercraft propelled by a water jet
US7731553Oct 9, 2007Jun 8, 2010Surfango, Inc.Watercraft propelled by a water jet
US7874883Nov 14, 2007Jan 25, 2011Surfango, Inc.System for steering and maneuvering a watercraft propelled by a water jet
US7950974Aug 27, 2007May 31, 2011Surfango, Inc.Weed cutter for a craft propelled by a water jet
US20030148679 *Feb 3, 2003Aug 7, 2003Yoshimoto MatsudaSmall watercraft
US20050266744 *May 26, 2004Dec 1, 2005Gardner Jeffrey LPersonal watercraft engine fluid cooling system
US20090061704 *Aug 27, 2007Mar 5, 2009Yuting RuiWeed Cutter for a Craft Propelled by a Water Jet
US20090093174 *Oct 9, 2007Apr 9, 2009Yuting RuiWatercraft Propelled By a Water Jet
US20090117789 *Nov 1, 2007May 7, 2009Yuting RuiEngine for Driving a Watercraft Propelled by a Water Jet
US20090124144 *Nov 14, 2007May 14, 2009Yuting RuiSystem for Steering and Maneuvering a Watercraft Propelled by a Water Jet
US20160228881 *Feb 4, 2016Aug 11, 2016Cde Global LimitedScreening apparatus
CN105221233A *Nov 5, 2015Jan 6, 2016重庆永发工业有限公司Double-side cooling plate of high-speed yacht engine cooling system
EP3090819A1 *Feb 5, 2016Nov 9, 2016CDE Global LimitedScreening apparatus
Classifications
U.S. Classification60/221, 440/88.00M, 123/196.00R, 440/38, 440/88.00L, 440/88.00R, 440/88.00P, 440/88.0HE, 184/104.1
International ClassificationF01P11/08, F01P3/20, F01M11/00
Cooperative ClassificationF01P3/207, F01P2050/02, F01M11/0004, F01P11/08
European ClassificationF01M11/00B, F01P3/20C, F01P11/08