Abstract: A lifting and rotating device includes a lifting unit having a gas lift and a support member having a hinge; a rotating unit rotatable around the hinge; and a decompression unit having a handle movable between a release position and a control position, a pressure regulating member pivotally disposed on the hinge and normally located at a release position, and a cable having one end connected to the handle and the other end connected to the pressure regulating member at a position substantially located on the pivot axis of the hinge. The handle is normally at the release position and the relative position between the pressure regulating member and a control pin of the gas lift remains unchanged when the rotating unit rotates around the hinge. When the handle is moved to the control position by an external force, the pressure regulating member is moved to press the control pin.

Abstract: In some embodiments, the locking enclosures may comprise a crank shaft that may be coupled with a handle. A crank plate may also be coupled with the crank shaft. A clutch mechanism may be coupled with the crank plate and configured to have an engaged configuration and a disengaged configuration. In the engaged configuration, the clutch mechanism may be configured to transfer torque from the crank shaft to the crank plate. In the disengaged configuration, the clutch mechanism may be configured to allow the crank shaft to rotate with respect to the crank plate such that no (or at least reduced) torque from the crank shaft is not transferred to the crank plate.

Abstract: Disclosed here are example gasifiers for gasification of solid carbon fuel. An example gasifier includes a vertical vessel that includes feeding means for introducing a fuel at a top and along a first vertical axis in the vessel. The example vessel also includes a pyrolysis zone for pyrolysis of the fuel, a combustion zone for burning pyrolysis gases from the pyrolysis zone, a reduction zone for gasifying carbonized fuel from the pyrolysis zone and an outlet for collecting gases produced in the reduction zone. In addition, the example vessel includes a horizontal plate fixedly mounted between the feeding means and the pyrolysis zone for receiving and retaining the fuel introduced into the vessel. Also, the example vessel includes a movable pusher mounted between the feeding means and the horizontal plate, the movable pusher to push the fuel retained on the horizontal plate into the pyrolysis zone and positioned or positionable above the horizontal plate.

Abstract: Improved combustion of biomass is achieved by injected first and second streams of biomass from a burner where the first stream of biomass has a median particle size larger than the biomass of the second stream and oxygen is injected with the first stream to provide an oxygen-enriched environment around the larger median sized particles. The oxygen-enriched environment is achieved either by injecting the oxygen directly into the first stream or by premixing the oxygen with the conveying air of the first stream.

Abstract: A method for optimizing the burnout of exhaust gases of an incinerator includes introducing a solid material via an inlet into a combustion chamber defining a primary combustion space, combusting the solid material in the primary combustion space, in the form of a combustion bed conveyed over a combustion grate, with admission of primary air, discharging the combusted solid material from the primary combustion space via an outlet arranged opposite the inlet in the conveying direction, combusting the primary combustion gases released during the combustion of the solid material, with admission of secondary air, in a secondary combustion chamber defining a secondary combustion space and arranged downstream of the combustion chamber in the flow direction of the combustion gases, and homogenizing the exhaust gases containing the primary combustion gases in a mixing zone by means of a fluid introduced via a nozzle before entry into the secondary combustion space.

Abstract: A seed meter is provided for use with a row crop planter or seed planter that includes a seed disk assembly that rotates within a meter housing cavity and that has a seed disk assembly cavity in which a vacuum pressure is applied for pulling seeds into seed pockets of a seed disk of the seed disk assembly. The vacuum pressure is applied to the seed disk assembly by pulling a vacuum airflow through a collector of a spindle-mounted hub support that is fluidly connected through a face seal arrangement with a hub face of the seed disk assembly.

Abstract: A wear liner is described for a seed delivery system housing containing a transport mechanism for moving seed along a seed path through the delivery system housing. The liner may include a wear liner insert extending along a portion of the seed path within the delivery, the wear liner insert including a wear surface interposed between the transport mechanism and the seed delivery system housing to protect at least one of the seed and the seed delivery system housing from wear. In certain embodiments, various features of the liner may extend outside the seed delivery system housing, to further protect the housing.

Abstract: A seed delivery system is provided that includes a row crop seed planter having a seed meter that can pneumatically deliver seeds to the agricultural field at a rearward velocity that matches a forward velocity of the planter. The seed meter may include a positive pressure source that pressurizes the seed meter and creates an airflow out of a seed tube of the seed meter that carries the individual seeds out of the seed tube at a rearward velocity that is automatically adjusted to match a forward velocity of the seed planter and tractor.

Abstract: A seed meter is provided for use with a row crop planter or seed planter that includes a seed disk assembly that rotates within a meter housing cavity and that has a seed disk assembly cavity in which a vacuum pressure is applied for pulling seeds into seed pockets of a seed disk of the seed disc assembly. The vacuum pressure is applied to the seed disk assembly by pulling a vacuum airflow through a spindle that supports the seed disk assembly. A wiper basket is arranged in a fixed position within the seed disk assembly cavity and seals against the seed disk assembly as a support plate and seed disk of the seed disk assembly rotate over the wiper basket, so that side walls of the wiper basket create a boundary between a vacuum zone and a non-vacuum zone inside of the seed disc assembly cavity.

Abstract: The present invention includes an auxiliary closing wheel for use with an agricultural seeding implement of a type of having a factory closing wheel rotatably coupled to a mounting arm with a rod. The auxiliary closing wheel includes a plate member rotatably coupled to the rod to which the factory closing wheel is coupled. The auxiliary closing wheel has a generally planar and annular configuration. The plate member includes a peripheral edge having a plurality of spiked teeth extending away therefrom. The plate member includes an inner surface defining a flange configured to mate with a recessed area of the factory closing wheel such that both wheels thereafter move unitarily. The plate member includes a diameter greater than a diameter of the factory closing wheel such that the spiked teeth will contact a ground surface in use instead of the factory closing wheel.

Abstract: There is provided a sewn product in which one material edge and the other material edge are stitched together in an abutted state. The one material edge and the other material edge are stitched together with one bobbin thread and a plurality of needle threads, the plurality of needle threads being interlocked with the one bobbin thread to form a plurality of rows of zigzag stitched seams.

Abstract: The sewing machine includes a needle bar, a needle bar mechanism, a moving mechanism, a projector, a processor, and a memory. The memory is configured to store computer-readable instructions that, when executed by the processor, instruct the processor to perform processes comprising specifying, a plurality of times, a position of an ultrasonic wave transmission source on a workpiece based on ultrasonic waves, setting a first stitch pattern and a sewing position of the first stitch pattern, based on a plurality of specified positions, causing the projector to project an image that shows the first stitch pattern onto the workpiece in the sewing position, creating first stitch pattern data for sewing the first stitch pattern in the sewing position, and causing, based on the first stitch pattern data, the moving mechanism to move the workpiece and the needle bar mechanism to move the needle up and down.

Abstract: Embodiments of the present invention are directed to devices and methods for powering a craft by aerodynamic forces. The device features a fairing member and flap element in which the flap element has a first flap position which creates a aerofoil contour on one face of the fairing member, and a second position in which the flap element presents an interrupted surface on both sides of the aerofoil to direct the fairing member in a non-power position without oscillation.

Abstract: An exemplary propulsion arrangement is disclosed which includes two propulsion units situated side by side at the stern of a ship at opposite sides of a center line of the hull of the ship. Each propulsion unit can include a hollow support structure attached to the hull, a chamber attached to the support structure, an electric motor within the chamber, a propeller connected through a shaft to the electric motor, and a pivotably supported rudder at the rear end of the chamber. Each propulsion unit can be mounted in a toe-out position forming a horizontal tilt angle (?) of 0.5 to 6 degrees to the center line (CL) of the hull.

Abstract: An anchor pin for anchoring small water vessels is provided. The anchor pin includes at least an upper pole and a lower pole that may telescope relative to one another. The upper pole may include a substantially hollow center in which the lower pole may be inserted into. The lower pole may slide within the upper pole and may thereby telescope relative to the upper pole. The lower pole may be locked in a fixed position relative to the upper pole so that the anchor pin may be set at a desired length to anchor the water vessel. The water vessel may be attached to the anchor pin by a rope.

Abstract: An improved mooring whip support base mounted vertically to a dock piling one embodiment having the means to rotate a housing supporting an inserted flexible mooring whip pole and means to lock said rotated mooring whip pole in a vertical position clearing the mooring whip pole from interfering with a vessel when leaving or returning from a dock when released the said rotating housing and mooring whip pole is manually lowered down to a determined desired degree positioning the flexible mooring whip pole a line or rope attached to the mooring whip base through a pulley at the end of the mooring whip pole and attached to the boat cleat keeping a boat from contacting a dock and possible damage.

Abstract: A dock assembly is made of floats and deck supports on top of the floats. The floats have upwardly opening channels in which utility conduits may be laid from above before the channels are closed by the deck supports. Whalers attached to the sides of the floats and deck supports connect adjacent floats to each other. Decking may be attached to the deck supports. Rods extending from side to side hold the whalers in place and fasten the deck supports to the floats.

Abstract: A dock system is formed from a plurality of interconnected dock modules, with adjacent dock modules connected together by means of at least one coupler. The coupler has a connector having a first end, a second end, and a middle portion which is flexible, compressible, and tensionable. Each dock module is formed from a buoyant float comprised of a plurality of buoyant float members, a decking support, decking mounted to the decking support to form a tread surface for the dock module, and a decking support connector extending between the decking support and the float to secure the decking support to the float. The decking support is formed from a frame made from frame members, at least one first cross member extending across one dimension of said float, and at least one second cross member extending across a second dimension of said float.

Abstract: A ship and associated methods of operation. In an example embodiment, a method of transporting includes providing multiple vessels each having a hull defining an air cavity over a water surface. Different ones of the vessels are loaded with material destined for different end locations. The vessels are connected to one another with rigid couplings to effect tandem movement of the multiple vessels over water as one ship while permitting each vessel to undergo changes in pitch. The vessels are transported to a first destination and one or more of the vessels are disconnected from the ship.

Abstract: A sidewall planing boat includes: a body; sub-bodies; and a power device; wherein the two sub-bodies are mounted on a front portion of the body and are symmetrically provided at two sides of the body; bottom surfaces of the sub-bodies are lower than a bottom surface of the body; wherein rigid sidewalls are symmetrically mounted on side surfaces of the body, rigid sub-sidewalls are symmetrically mounted on side surfaces of the sub-body; portions of the sidewalls and the sub-sidewalls which extend to a bottom of the sidewall planing boat are inserted into water for forming three lifting areas with front openings with the bottom; wherein the power device is mounted on the body and/or the sub-bodies. With the foregoing structure, water resistance of the sidewall planing boat is decreased and a sailing speed in increased.

Abstract: A speed displaying device is provided in a vehicle that travels to reach a set target speed, and displays a speedometer which indicates a speed of the vehicle. The speed displaying device includes a speedmeter having a scale and a controller that controls to display a pointer pointed position which indicates a position of current speed of the vehicle in the scale of the speedometer, a speed setting position which indicates a position of the target speed in the scale of the speedometer, and a speed difference region which indicates the size of the difference between the current speed and the target speed with an area on the speed meter. The speed difference region is displayed at a position near the scale of the speedometer.

Abstract: A display device for a hybrid vehicle having a first drive source and at least one second drive source for driving the hybrid vehicle according to a load requirement by the driver. The display device has at least one display component for displaying a value of a load requirement predetermined by the driver at a specific time and, when the hybrid vehicle is driven exclusively by the at least one second drive at said time, at least one additional display component is provided for visualizing a limit of a maximum load requirement retrievable by the driver at said time, wherein if said load requirement is exceeded, the first drive source is also or exclusively activated for driving the hybrid vehicle. At least one further display component can be activated, via which the visualization of at least one such mode of operation of the hybrid vehicle is possible.

Abstract: A single-crystal silicon pulling silica container including: a transparent silica glass layer in the inner side of the silica container; and an opaque silica glass layer containing gaseous bubbles in the outer side of the silica container, wherein the transparent layer constitutes of a high-OH group layer placed on an inner surface side of the silica container containing the OH group at a concentration of 200 to 2000 ppm by mass and a low-OH group layer having the OH group concentration lower than the high-OH group layer containing Ba at a concentration of 50 to 2000 ppm by mass. Resulting in the silica container used for pulling single-crystal silicon, providing the silica container improves etching corrosion resistance of the container inner surface to silicon melt when the entire inner surface of transparent silica glass of the container is crystallized short after using the container and method for such silica container.

Abstract: A susceptor for supporting a crucible includes a body with an interior surface defining a cavity. A coating is disposed on the interior surface to provide a barrier for preventing contact between the body of the susceptor and the crucible disposed within the cavity.

Abstract: A crystal growth apparatus includes a first housing, a second housing and a controller received in the second housing. The first housing includes a first main body and defines a growth chamber in the first main body. The second housing includes a second main body and a pulling rod. The second main body defines a transmission chamber and a cooling chamber. The pulling rod is mounted in the transmission chamber, and a first seed rod is mounted on the pulling rod. The controller includes a transmission member and a pair of partition assemblies. The second housing includes a separating sheet and a second seed rod. The separating sheet separates the transmission chamber from the growth chamber. The second seed rod is mounted in the cooling chamber. The pair of partition assemblies move enabling the cooling chamber to communicate with the transmission chamber, such that the transmission member exchanges seed rods.

Abstract: An extrusion nozzle for applying a paste to a green sheet. The nozzle having a center orifice with a leading edge and a trailing edge. The leading edge comprising a tip having a durometer value of about 40 D shore. The leading edge may comprise a urethane material. The trailing edge may either be a carbide rod or it may comprise a material with a durometer value of about 60 D shore. The trailing edge may also comprise a urethane material. The urethane material may be molded onto the nozzle and ground down to meet the specifications required for the application of the paste.

Abstract: A display panel manufacturing device including a stage slider, a first stage configured to slide on the stage slider and to receive a test substrate, a second stage on the stage slider and configured to receive a main substrate, and a patterning unit located at a distance from the stage slider and configured to discharge organic drops onto the test substrate, configured to analyze patterns of the organic drops, configured to modify the patterns of the discharged organic drops according to an analysis of the patterns of the organic drops, and configured to discharge the organic drops onto the main substrate.

Abstract: A substrate processing apparatus includes: a processing chamber configured to accommodate a substrate; a vaporized gas supply system which includes a vaporizer to vaporize a liquid precursor into a vaporized gas and is configured to supply the vaporized gas into the processing chamber; and a control unit configured to control the vaporized gas supply system to supply a liquid precursor and a carrier gas into a vaporization chamber formed in the vaporizer such that a ratio of a partial pressure of the liquid precursor to a total pressure in the vaporization chamber is equal to or lower than 20%.

Abstract: The present invention relates to an apparatus for fabricating ingot including a crucible to accommodate a material, a top cover enclosing the circumference of the temperature difference compensative part, and a heat insulator to be disposed on the top cover.

Abstract: A litter box monitoring system including: one or more sensors associated with one or more litter boxes; one or more processors; and one or more non-transitory computer readable media coupled to the one or more processors having instructions stored thereon which, when executed by the one or more processors, cause the one or more processors to perform a method comprising: detecting, using the one or more sensors, at least one of entry or exit of an animal relative to the one or more litter boxes; and calculating, using the one or more processors, frequency of use of the one or more litter boxes based on the detected at least one of entry or exit of an animal relative to the one or more litter boxes.

Abstract: Certain exemplary embodiments can provide a method, which can comprise a plurality of activities, which can comprise automatically detecting the presence of a bird in a housing. The housing can be adapted to substantially surround the bird. The housing can define an aperture adapted for the bird to enter and exit the housing.

Abstract: A collar with an ultra-wideband radar is described. A housing contains sensor electronics and the transmit and receive antennas are located separate from the housing around the circumference of the collar. A first example of the collar includes a first transmit antenna and a first receive antenna. A second example of the collar adds a second transmit antenna and a second receive antenna.

Abstract: A harness for pets that allows them to move freely, without causing them damage or possible wounds, thanks to a piece of laminar textile material composed of a central part with front vertexes and rear vertexes which project themselves to define both ears with complementary connection clasps, and both parts of belt with complementary fasteners, and the central part shows an opening on one of the sides of the center of the part, while on the other side there is a girdle with fasteners for a leash.

Abstract: A fluid heating system, comprising: a heater having an inlet and an outlet; a storage vessel; a fluid mixer having a first inlet for receiving fluid stored in or passing through the storage vessel, a second inlet for receiving fluid from a cold fluid supply, and an outlet for supplying fluid to the heater inlet; wherein in a first mode the heater is operable to heat fluid in the storage vessel, and in a second mode the fluid mixer is mixes fluid from or passing through the storage vessel with fluid from the cold fluid supply at a predefined volumetric ratio to provide mixed fluid to the inlet of the heater to be heated further to an output temperature.

Abstract: An engine system may include a thermostat casing connected to a first, second, third, and fourth flow channels, a valve guide in which a main valve that opens and closes the first flow channel is formed at one side, a closing valve that opens and closes the second flow channel is formed at the other side, and a bypass valve is formed adjacent to the closing valve, an elastic member that elastically supports the valve guide to enable the main valve to block the first flow channel and the closing valve to block the second flow channel, a driver that moves the valve guide so that the main valve opens the first flow channel and the closing valve opens the second flow channel according to a temperature of a coolant, and a control unit that controls the temperature and a flow of the coolant by controlling the driver.

Abstract: The invention relates to a coolant circuit (1) for an internal combustion engine (2), wherein the coolant can circulate between the internal combustion engine (2) and a heat sink (3) depending upon a switchable valve (4), which is closed in the initial state during a cold start of the internal combustion engine (2), wherein the valve (4) can be switched to an at least partially opened sequential state depending on an exhaust gas mass flow emitted by the internal combustion engine (2), and wherein a control device (6) determines an integral of the exhaust gas mass flow with respect to the time and switches the valve (4) into the sequential state when an integral threshold value is exceeded.

Abstract: A baffle for engine fluid cooling includes a fluid guide having a pair of side walls, a bottom wall, and a coolant fluid inlet. A channel receives a pair of heat exchangers such that one may be positioned proximate to or above a part of the bottom wall and the other may be positioned proximate to or above another part of the bottom wall. Some coolant entering the guide flows into the first heat exchanger and some coolant is passed under the first heat exchanger and subsequently into the second heat exchanger.

Abstract: A control housing cover for an internal combustion engine includes an engine block cover portion having a plurality of apertures, an oil separator for blow-by gases integrated into the control housing cover, an engine support plate operable for securing supporting the internal combustion engine in place and wherein the oil separator is arranged neighboring the engine support plate.

Abstract: An axial piston internal combustion engine designed to improve the thermal efficiency of the engine by utilizing a sine wave/connecting rod assembly (5) to cause the piston (6) of the engine to travel vertically parallel to the engine's main shaft (13). The upper sine wave barrel (2) and lower sine wave barrel (3) have a channel in them that the cylindrical ends of the connecting rod (4) travel in, forcing the connecting rod (4) and piston (6) to travel vertically. The engine also utilizes slide valve (20) that has slots in it that when slid past the ports of the upper cylinder head (18) and lower cylinder head (19) controls the intake and exhaust timing events of the engine.

Abstract: A combustion engine can include an engine block having interior and exterior block surfaces and a combustion generating system connected thereto, with the inner block surface defining a cavity therein; an exhaust port between the inner and exterior block surfaces; a crankshaft rotatably fixed within the cavity and configured to rotate around an axis; and leading and trailing blades connected to the crankshaft. During a combustion event, the inner block surface is complementarily shaped to the leading and trailing blades, such that the inner block surface is outside the blades' ranges of travel. A combustion generating system can supply and ignite an air fuel composition to create a combustion force positioned closer to one of the blades, forcing the one of the blades to rotate away from the combustion force, which rotates the crankshaft around the axis.

Abstract: A variable valve lift device and a valve apparatus for a vehicle engine may include a valve configured to open/close a combustion chamber, a cam having a predetermined cam profile and rotatable by receiving a power generated in the combustion chamber, a cam side rocker arm rotatable by the cam, a rocker shaft penetratively mounted into the cam side rocker arm, a valve side rocker arm installed on the rocker shaft to apply a pressure for opening the valve while being turned by the cam side rocker arm, a hydraulic interval adjustment device installed in the cam side rocker arm to adjust an interval between the cam side rocker arm and the valve side rocker arm, and a hydraulic interval maintaining device configured to maintain the interval between the cam side rocker arm and the valve side rocker arm adjusted by the hydraulic interval adjustment device.

Abstract: Devices and related methods are disclosed that generally involve the selective deactivation of one or more engine valves. In one embodiment, a split-cycle internal combustion engine is provided in which a high-speed trigger valve is used to fill and drain a hydraulic tappet that forms part of a lost-motion system of an engine valve. A spool valve can be used to selectively disconnect the tappet from the trigger valve, thereby deactivating the associated engine valve (i.e., preventing the engine valve from opening). The devices and methods disclosed herein also have application in conventional internal combustion engines and can be used with inwardly-opening and/or outwardly-opening valves.

Abstract: An inspection system for a continuous variable valve lift device includes: a drive motor configured to rotate a cam; a sensor unit including at least one sensor configured to output an electrical signal corresponding to rotational displacements at both ends of a swing arm which opens and closes a valve by receiving rotational motion of the cam through the continuous variable valve lift device; and an inspector configured to measure and inspect a valve lift of the continuous variable valve lift device by receiving and calculating the electrical signal of the sensor unit, and is installed in a vehicle engine assembly line to accurately measure and inspect the valve lift after the continuous variable valve lift device is assembled.

Abstract: A variable valve lift apparatus may include a camshaft, a cam piece having first cams having lift amounts that are different formed at one side thereof, a first cam protrusion portion formed near the first cams that is slidably disposed on the camshaft to rotate with the camshaft, a first guide pin that protrudes on one side of an exterior circumference of the first cam protrusion portion, a first guide that is disposed to correspond to the first cam protrusion portion and in which a first guide groove is formed thereon to move the first cam piece in one direction along the camshaft according to the rotation of the first guide pin, and a first operation portion that moves the first guide toward the first cam protrusion portion such that the first guide pin is inserted into the first guide groove of the first guide.

Abstract: A valve-timing control apparatus includes a phase change mechanism configured to change a valve timing, a cover member provided near a front end side of the phase change mechanism; slip rings provided to one of a front end portion of the phase change mechanism and a facing surface of the cover member which faces the phase change mechanism; a pair of brushes provided to another of the front end portion of the phase change mechanism and the facing surface of the cover member to be axially slidable. One end portion the pigtail harness is connected with the corresponding brush. Another end portion of the pigtail harness is connected with a connector terminal under a deflected state, at a location radially shifted from an axis of the corresponding brush. The another end portions of the pair of pigtail harnesses are separated from each other by a partition wall.

Abstract: A valve actuation mechanism for an internal combustion engine includes rockers moved by a camshaft, each rocker being adapted to exert a valve opening force on at least a portion of a opening actuator of each cylinder, via an activation piston of the rocker movable with respect to the rocker under action of a fluid pressure raise in a chamber, from a first position to a second position, in which a cam follower of the rocker is adapted to read at least one auxiliary valve lift sector of a cam of the camshaft so as to perform an engine operating function. Each rocker includes a valve for releasing fluid from the chamber, wherein the valve actuation mechanism includes, for each rocker, a stopper fast with a housing of the engine and adapted to exert, on a member of the rocker, a variable force for opening the fluid releasing valve.

Abstract: An engine, such as a circulating piston engine, includes a housing that defines an annular bore, a piston assembly, and a valve. The piston assembly is disposed within the annular bore and is configured to be coupled to a drive mechanism. The valve is configured to be intermittently disposed within the annular bore to define a combustion chamber relative to the piston assembly.

Abstract: An internal combustion engine valvetrain for an internal combustion engine. The internal combustion engine Includes one or more cylinders with one or more intake valves, one or more blowdown exhaust valves, and one or more scavenge exhaust valves. In one example, the internal combustion engine valvetrain includes a first valve actuation mechanism to open and close the blowdown exhaust valves, and Includes a second valve actuation mechanism to open and close the scavenge exhaust valves.

Abstract: A reset rocker arm braking method and device are provided. A braking piston hole and an oil drain piston hole which are communicated with a braking oil supply passage are arranged inside a rocker arm, and an oil drain passage is arranged between the braking piston hole and the oil drain piston hole. When the rocker arm is driven by a braking cam lobe of a cam, an exhaust valve is opened to realize braking by a braking piston inside the braking piston hole. When the rocker arm is driven by an exhaust cam lobe of the cam, the rocker arm drives an oil drain piston in the oil drain piston hole to open the oil drain passage to discharge oil, and the lift profile of the exhaust valve is reset and reduced to a conventional exhaust valve lift profile without an engine braking.

Abstract: A lubricant additive comprising an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent dispersed in a diluent comprising 10 mass % or more of a basestock containing greater than or equal to 90% saturates and less than or equal to 0.03% sulphur is blended, in a minor amount, with an oil of lubricating viscosity, in a major amount, to give a trunk piston marine engine lubricating oil composition for a medium-speed four-stroke compression-ignited marine engine.