|Publication number||US3292373 A|
|Publication date||Dec 20, 1966|
|Filing date||Dec 2, 1964|
|Priority date||Dec 10, 1963|
|Publication number||US 3292373 A, US 3292373A, US-A-3292373, US3292373 A, US3292373A|
|Original Assignee||Yanmar Diesel Engine Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (27), Classifications (19)|
|External Links: USPTO, USPTO Assignment, Espacenet|
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.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2382218 *||Sep 18, 1943||Aug 14, 1945||Fernstrum Robert W||Outboard marine heat exchanger|
|US2682852 *||May 22, 1952||Jul 6, 1954||Ruffolo Mario A||Marine engine cooling device|
|US2757650 *||Nov 12, 1953||Aug 7, 1956||Holley Donald A||Thermostatic control for marine engine cooling systems|
|US2976834 *||Dec 4, 1958||Mar 28, 1961||Sam Schleifer||Marine heat exchanger|
|US3040695 *||Feb 16, 1960||Jun 26, 1962||Buehler Corp||Intake strainer|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3827392 *||Jul 21, 1972||Aug 6, 1974||Scooter Ski Ltd||Water planing craft|
|US4237812 *||Sep 28, 1978||Dec 9, 1980||Richardson Jerald S||Jet ski grating|
|US5330374 *||Feb 16, 1993||Jul 19, 1994||Sanshin Kogyo Kabushiki Kaisha||Jet propulsion system|
|US5433635 *||May 28, 1993||Jul 18, 1995||Yamaha Hatsudoki Kabushiki Kaisha||Jet plate sensor for watercraft|
|US5507673 *||May 30, 1995||Apr 16, 1996||Boggia; Richard||Jet propelled watercraft|
|US5545063 *||Jan 21, 1993||Aug 13, 1996||Haynes; 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, 1997||Apr 13, 1999||Yamaha Hatsudoki Kabushiki Kaisha||Speed sensor for watercraft|
|US6192817 *||Jul 8, 1999||Feb 27, 2001||Andrzej Dec||Motorized surfboard|
|US6524149 *||Apr 13, 1999||Feb 25, 2003||Yamaha Hatsudoki Kabushiki Kaisha||Cooled oil reservoir for watercraft|
|US6544085 *||Oct 19, 2000||Apr 8, 2003||Bombardier Inc.||Watercraft having a closed coolant circulating system with a heat exchanger that constitutes an exterior surface of the hull|
|US6568340||Nov 14, 2001||May 27, 2003||Andrzej Dec||Motorized wakeboard|
|US6869324 *||Feb 3, 2003||Mar 22, 2005||Kawasaki Jukogyo Kabushiki Kaisha||Small watercraft|
|US7094118 *||Mar 23, 2005||Aug 22, 2006||Brunswick Corporation||Heat exchanger for a marine propulsion system|
|US7128025||Oct 25, 2004||Oct 31, 2006||Brp Us Inc.||Dual temperature closed loop cooling system|
|US7597600||Nov 1, 2007||Oct 6, 2009||Surfango, Inc.||Engine for driving a watercraft propelled by a water jet|
|US7731553||Oct 9, 2007||Jun 8, 2010||Surfango, Inc.||Watercraft propelled by a water jet|
|US7874883||Nov 14, 2007||Jan 25, 2011||Surfango, Inc.||System for steering and maneuvering a watercraft propelled by a water jet|
|US7950974||Aug 27, 2007||May 31, 2011||Surfango, Inc.||Weed cutter for a craft propelled by a water jet|
|US20030148679 *||Feb 3, 2003||Aug 7, 2003||Yoshimoto Matsuda||Small watercraft|
|US20050266744 *||May 26, 2004||Dec 1, 2005||Gardner Jeffrey L||Personal watercraft engine fluid cooling system|
|US20090061704 *||Aug 27, 2007||Mar 5, 2009||Yuting Rui||Weed Cutter for a Craft Propelled by a Water Jet|
|US20090093174 *||Oct 9, 2007||Apr 9, 2009||Yuting Rui||Watercraft Propelled By a Water Jet|
|US20090117789 *||Nov 1, 2007||May 7, 2009||Yuting Rui||Engine for Driving a Watercraft Propelled by a Water Jet|
|US20090124144 *||Nov 14, 2007||May 14, 2009||Yuting Rui||System for Steering and Maneuvering a Watercraft Propelled by a Water Jet|
|US20160228881 *||Feb 4, 2016||Aug 11, 2016||Cde Global Limited||Screening apparatus|
|CN105221233A *||Nov 5, 2015||Jan 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, 2016||Nov 9, 2016||CDE Global Limited||Screening apparatus|
|U.S. Classification||60/221, 440/88.00M, 123/196.00R, 440/38, 440/88.00L, 440/88.00R, 440/88.00P, 440/88.0HE, 184/104.1|
|International Classification||F01P11/08, F01P3/20, F01M11/00|
|Cooperative Classification||F01P3/207, F01P2050/02, F01M11/0004, F01P11/08|
|European Classification||F01M11/00B, F01P3/20C, F01P11/08|