Abstract: A paintball work table having a paintball pod carry suspender, helmet cavity and paintball gun cavity is described herein. The paintball work table permits the paintball player to effectively and efficiently manage his/her equipment between paintball scrimmages. Also, the paintball work table may be foldable and easy to carry.

Abstract: A combustion system for extracting thermal energy from biomass or other formable fuels that does not require densification or other processing of the biomass prior to combustion. This system continuously feeds the biomass fuel from an auger or other conveyance system while simultaneously causing the biomass fuel to be formed with a hollow core. The biomass fuel is ignited from within the hollow core and burns primarily radially outward due to negative pressure surrounding combustion chamber thus facilitating and containing the combustion process. This system also utilizes pre-heating the fuel, primary and secondary air pre-heating, insulated combustion chambers, and carefully control combustion air to ensure substantial combustion is achieved even with fuels having high moisture content. In the preferred embodiment, a heat exchanger is utilized to capture thermal energy of combustion products for use as an energy source for additional processes.

Abstract: The invention pertains to a device for sowing new grass seed, fertilizer or other products in an existing lawn. The device comprises a chassis (1) which includes a drive shaft (15) in the horizontal plane fitted with cams, around which bearing-mounted pin disk (12) combinations have been fitted. The device is also fitted with a seed dosing system, consisting of a seed tray (3) and a driven dosing roll (5), the dose of which can be changed. The dosed seed (4) falls onto a guiding plate (10) along its full width, where the seed (4) is distributed in rows by means of funnel plates (11) and is introduced to the pin disks (12). The pin disks collect the seed and plant it in the existing lawn. In order to improve results on hard soil, a vibrating action in the vertical plane can be added to the pin disks (12) by driving the central drive shaft (15). This vibrating movement pushes the seed into the soil, presses it against the side of the hole and improves penetration of the pins in hard soil.

Abstract: A manufacturing process and resultant medical devices and components thereof wherein one or more individual laces (12) is placed within an embroidered structure (10) using an automated process allowing for the manufacture of embroidered surgical implants containing laces to be mass produced repeatably and cost effectively.

Abstract: A system (10) for manufacturing a mattress (300) comprises multiple modules or stations (12, 132, 188, 200) used to sew together multiple components into a casing (252). A spring or other core (270) is inserted into the casing (252) before a top (274) is secured to the casing (252) to complete the mattress (300). One or more flanges (261, 266) may be incorporated into the casing (252) for securing the core (270) inside the casing (252). The system (10) provides an operator flexibility to manufacture different types of mattress with minimal changes.

Abstract: The device comprises a tubular member (377) on which a tubular knitted article (M) is disposed and an operating head (1432) positioned in front of an end of the tubular member, comprising a plurality of contact members (1467; 1447, 1453).

Abstract: An automated actuation group (220) for a porthole (10) provided with a frame-shaped structure (11) and a window (14) constrained so that it can move to the frame (11), wherein the porthole (10) comprises actuator means (100) that force the displacement of an arm element (22, 22?) comprising guide means (24, 24?), such guide means (24, 24?) cooperating with the window (14) forcing it to move with respect to the frame (11) during the opening and the closing of the porthole (10).

Abstract: An anchor rope provided with an elastic core to retract an unloaded watercraft from a beach. The elastic core extends along a major portion of the anchor rope and is attached at its ends to the rope by cords each of which terminates externally of the anchor rope in knotted securement thereto.

Abstract: The invention relates to a lowerable platform (1) for a water craft (10), which can be also horizontally extended and to which a float (2) is fastened that comprises a closed hollow space (43) or an open hollow space (43), a buoyancy (A) acting upon the float (2) being generated by the air volume (L). As a result, the water craft's proper weight or the payload (N) of e.g. a tender boar (27) on the lowerable platform (1) can be compensated by the buoyancy (A). A hydrodynamic design of the float (2) additionally generates a hydrodynamic buoyancy (D1) which can be varied in terms of its height in relation to the current (S) by means (4, 37, 38, 39), depending on the float (2).

Abstract: An open sea hydrofoil craft comprising a hull (A) with lateral vertically oriented blades (B1,B2) extending longitudinally along the two sides thereof, the interior surfaces of blades (B1,B2) lying one opposite the other being planar and defining in between them an initially convergent and subsequently divergent water flow channel, whilst their exterior surfaces have a curved configuration that dynamically changes in three dimensions (x, y, z) with variable angular parameter (?1) formed by the bottom of blades (B1,B2) with (y) axis, (?2) formed by the curved section of the exterior surfaces or blades (B1,B2) with (z) axis and (?1,?2) formed by an arcuate lateral edge (20) of blades (B1,B2) with (x) axis. Lift producing foils (C1,C2,C3) with a hydrofoil section are provided within the channel formed in between blades (B1,B2), these lift producing foils (C1,C2,C3) being connected to the hull (A) by means of supporting plates (C1?, C2?, C3?) respectively.

Abstract: A suspension system for a lifeboat comprises a pair of hook assemblies (22) each adapted for connection at spaced locations to a lifeboat and for coupling to the lifting links (14) of a pair of suspension cables. Each hook assembly has a hook member (34) pivoted for movement between a closed setting (FIG. 4) and an open setting (FIG. 5) and is of a load over centre design. A single control mechanism (23) is provided for both hook assemblies and is connected thereto by way of a pair of flexible cables (24,25). A primary release mechanism (26,67,68,61) is arranged to pull the cables and so move the hook members to their open settings when the lifeboat is floating. Under emergency conditions when the hook assemblies are heavily loaded, an emergency release mechanism (28,75,72,57) is arranged to move the hook members (34) to their open settings notwithstanding the relatively large load thereon.

Abstract: An apparatus for the prevention of flag entanglement upon a flagstaff that is comprised of a specifically milled wood block which acts as an attaching mechanism to the flagstaff and is the hinge point for a metal rod that is attached to the flag. The hinge point of the block allows the rod to swing in a 180 degree arc from the 90 degrees to 270 degrees. The length of the rod being equal to or greater than the width of the flag in conjunction with the hinge block action prevents the flag from flipping over and tangling on the staff.

Abstract: A fuel gauge is adapted to extend into a fuel tank to enclose liquid fuel in the fuel tank and to sense the level of liquid fuel in the fuel tank. The fuel gauge includes a fuel-level indicator having a needle and a buoyant float exposed to the liquid fuel in the fuel tank. The needle moves in response to changes in the level of liquid fuel in the fuel tank sensed by the buoyant float.

Abstract: With reference to FIG. (1), the present invention relates to a sound synthesizer system for use in a vehicle having an internal combustion engine. The system comprises a sound synthesizer unit (12) operable to produce sound signals by generating and combining signals of different frequencies, a speed sensor (10) for providing a speed of revolution signal indicative of speed of revolution of the internal combustion engine of the vehicle, and an inclinometer (11) attachable to a throttle control of the internal combustion engine which provides an inclination signal indicative of inclination of the throttle control. The sound synthesizer unit (12) receives the speed of revolution signal from the speed sensor (10) and the inclination signal from the inclinometer (11) and uses both signals to determine what sound signals are produced thereby, the sound synthesizer) unit (12) varies the sound signals with changes in the speed of revolution signal and changes in the inclination signal.

Abstract: A silica glass crucible used for pulling single-crystal silicon, which includes a cylindrical straight body part, a bottom part and a curved part located between the straight body part and the bottom part, wherein the curvature radius of the inner wall surface of the curved part is 100 to 240 mm. Variation of the wall thickness W of the curved part is preferably 0.1 to 1.4 mm/cm.

Abstract: The invention is a method for pulling a silicon single crystal, which is a Czochralski method for growing the silicon single crystal by contacting a seed crystal with a melt and by pulling up, including the steps of: contacting the seed crystal with the melt; forming a necking portion under the seed crystal; and forming the silicon single crystal under the necking portion by increasing a diameter, wherein a pulling rate during forming the necking portion is 2 mm/min or less, and the silicon single crystal with the increased diameter is a boron-doped silicon single crystal having a resistivity of 1.5 m?·cm or less at a shoulder portion. Therefore, there can be provided a method of pulling a silicon single crystal without generating defects such as scratches at a wafer surface in the case of processing a boron-doped silicon single crystal ingot with a low resistivity produced by CZ method into a wafer.

Abstract: The device for producing a sheet of crystalline material by directional solidification of a material in liquid phase composed of a crucible provided with a bottom, side walls and at least one horizontal outlet slot arranged on a bottom part of a side wall. On its external surface in immediate proximity to the slot, the crucible presents electromagnetic means for creating magnetic repulsion forces on the material in liquid phase, at least at the level of the slot. An alternating current with a frequency comprised between 10 kHz and 300 kHz flows through the electromagnetic means. To foster stirring of the material in liquid phase, a low frequency can be used in addition to the above frequencies.

Abstract: The present invention relates to a seed crystal consisting of a silicon carbide single crystal suitable for producing a substrate (wafer) for an electric power device, a high-frequency device or the like, and a method for producing an ingot using the same. A single crystal growing face of a seed crystal consisting of a silicon carbide single crystal is inclined at an angle ranging from 3 degrees or more to 60 degrees or less with respect to the (11-20) face to a direction inclined at an angle ranging from ?45 degrees or more to 45 degrees or less from a <0001> direction to the [1-100] direction. By performing crystal growth using such a seed crystal, a high quality silicon carbide single crystal ingot can be obtained. According to the present invention, it is possible to obtain material consisting of a silicon carbide single crystal of favorable quality, which has few crystal defects such as micropipe defects and stacking faults, and the diameter is suitable for practical application.

Abstract: An apparatus and method of manufacturing a crystal grower is disclosed. The crystal growing apparatus includes a receptacle constructed to receive a material selected to grow a crystal and an induction heater constructed to heat the material, with the induction heater comprising a Litz coil and a hose constructed to receive the Litz coil therein. The hose further comprises an inner liner formed of an electrically non-conductive material, a reinforcement layer surrounding the inner liner to provide structural reinforcement thereto, and an outer liner applied about the reinforcement layer to form an exterior of the hose.

Abstract: A rod cradle for a film, coating, or dam rod includes a frame profile (12) equipped with an insert groove (14), an insert (16) fitted into the insert groove, and the insert having a rod groove (18) and a rod (28) therein. The device has locking elements (24) for locking the insert (16) into the frame profile (12). There are, on the sides of the insert groove, edges (20) through which the insert passes into the insert groove when the rod is not present. On the sides of the rod groove(16) there are opposing lips (22). The lips (22) have vertices (74) through which the rod (28) can pass without damage to the rod or the insert so that the rod can be inserted in to the rod groove (18) and lock the insert (16) in the insert groove (14) of the frame profile.

Abstract: A substrate support system comprises a substrate holder having a plurality of passages extending between top and bottom surfaces thereof. The substrate holder supports a peripheral portion of the substrate backside so that a thin gap is formed between the substrate and the substrate holder. A hollow support member provides support to an underside of, and is configured to convey gas upward into one or more of the passages of, the substrate holder. The upwardly conveyed gas flows into the gap between the substrate and the substrate holder. Depending upon the embodiment, the gas then flows either outward and upward around the substrate edge (to inhibit backside deposition of reactant gases above the substrate) or downward through passages of the substrate holder, if any, that do not lead back into the hollow support member (to inhibit autodoping by sweeping out-diffused dopant atoms away from the substrate backside).

Abstract: A shutter disk suitable for shield a substrate support in a physical vapor deposition chamber is provided. In one embodiment, the shutter disk includes a disk-shaped body having an outer diameter disposed between a top surface and a bottom surface. The disk-shape body includes a double step connecting the bottom surface to the outer diameter.

Abstract: A plasma treatment apparatus includes a susceptor, a silica cover covering a plasma generating area above the susceptor, a chamber housing the susceptor and the silica cover, a gas inlet introducing conditioning gas into the chamber, a plasma generator generating a plasma of the conditioning gas configured to perform conditioning of the silica cover, an analyzing unit configured to monitor changes in a nitride layer on the surface of the silica cover, and a control unit connected to the analyzing unit configured to determine completion of the conditioning based on the change in the nitride layer.

Abstract: [Problem] To provide a coating apparatus capable of automatically executing a series of steps of measuring the shape of a lens and applying a primer solution thereon, drying the primer solution and applying a photochromic coating solution thereon, and curing the coated solutions by the UV irradiation, liberating the operator from the work of setting the lenses piece by piece. [Means for Solution] A lens-feeding portion 2 is arranged upstream of the series of steps, the lens-feeding portion 2 having lens-holding units 22 in which a plurality of lenses are arranged straight in the horizontal direction and/or in the up-and-down direction, and a first lens sub-carrier means 31 for carrying the lenses held therein to the lens-measuring portion 3.

Abstract: A continuous thin film deposition apparatus that includes a remote plasma source. The source forms a plasma from a precursor and delivers a modified form of the plasma as a charge-depleted deposition medium to a deposition apparatus for formation of a thin film material. The thin film may be formed on a continuous web or other moving substrate. The charge-depleted deposition medium may be formed within the remote plasma source and delivered to an operatively coupled deposition apparatus or the charge-depleted deposition medium may form as the plasma exits the remote plasma source. The initial plasma is formed within the remote plasma source and includes a distribution of charged species (electrons and ions). The charge-depleted deposition medium contains a reduced concentration of the charged species and permits deposition of thin film materials having lower defect concentration.

Abstract: A method and apparatus having a RF return path with low impedance coupling a substrate support to a chamber wall in a plasma processing system is provided. In one embodiment, a processing chamber includes a chamber body having a chamber sidewall, a bottom and a lid assembly supported by the chamber sidewall defining a processing region, a substrate support disposed in the processing region of the chamber body, a shadow frame disposed on an edge of the substrate support assembly, and a RF return path having a first end coupled to the shadow frame and a second end coupled to the chamber sidewall.

Abstract: A deposition apparatus according to an exemplary embodiment of the present invention includes a plurality of reaction spaces, a plurality of plasma electrodes respectively disposed in the reaction spaces, a first plasma processor connected to at least two plasma electrodes, and a first plasma power source connected to the first plasma processor. The first plasma processor may include a plasma distributor or a plasma splitter.

Abstract: Molecular fluorine may be generated and distributed on-site at a fabrication facility. A molecular fluorine generator may come in a variety of sizes to fit better the needs of the particular fabrication facility. The generator may service one process tool, a plurality of process tool along a process bay, the entire fabrication facility, or nearly any other configuration within the facility. The process can obviate the need and inherent risks with transporting or handling gas cylinders. The process can be used in conjunction with a cleaning or fabrication operation used in the electronics fabrication industry.

Abstract: A plasma coating system includes at least one coating station with a first side and a second side defining a pathway with at least one bend. The coating station also includes a first plasma arc that provides a plasma jet directed towards a substrate. The first plasma arc is positioned on either the first side or the second side of the bend.

Abstract: A coating method for a internal member having holes in a vacuum processing apparatus is provided. The method includes a process (A) of filling small holes 78 of the internal member 81 with padding plugs 20 each of which has a core member 22 made from a metal material and a metal-resin composite layer 24 covering the circumferential surface of the core member 22, the metal-resin composite layer 24 being a complex consisting of a metal material and a resinous material exhibiting nonconjugative property to a coating film 80, a process (B) of forming the ceramic coating film 80 on the surface of the internal member 81 by plasma spraying after the process (A) and a process (C) of extracting the padding plugs 20 out of the holes 78 after the process (B). By this coating method, it becomes possible to solve various problems about the technique of filling the holes with the pudding plugs, so that a coating film superior in its quality performance can be produced effectively.

Abstract: The invention relates to a method for collecting milk in a milk tank. The method comprises the steps of: milking a milking animal of a herd of milking animals by means of a milking station; establishing a quality parameter for the milk obtained from the milking animal during the milking; estimating a quality level of the total amount of milk in a milk tank connected to the milking station, wherein the estimation is based at least on the quality parameter; and collecting, in the milk tank, the milk obtained from the step of milking if the result from the estimation indicates that the quality of the total amount of milk in the milk tank would then result in a desired quality level. The invention also relates to computer program products and a milking system.

Abstract: The invention relates to a milk tube for a milking unit, comprising two end regions lying opposite one another and an intermediate region, all regions being interconnected to form one piece. The intermediate region is composed of a soft material and at least one end region is composed of at least one hard material.

Abstract: A teatcup liner adapted to be mounted in a shell to form a teatcup to be applied to a teat of an animal, and a method of mounting a teatcup liner. The liner defines an inner space for receiving the teat and a longitudinal centre axis. The liner has a head portion, a tubular barrel portion and, a tubular lower portion defining a milk channel having a cross-section area perpendicular to the centre axis. The tubular lower portion has a primary engagement member to be engaged by a secondary engagement member of the shell. The liner includes a grip member extending from the tubular lower portion to be gripped by an operator when the liner is to be mounted. The grip member defines a force application zone on which a pulling force is to be applied and which seen along the centre axis is located within the cross-section area.

Abstract: The invention relates to various devices which allow dogs to be temporarily occupied automatically when the owner is absent.

Abstract: A miniature size bird feeder that includes a feed holder; a cap or cover over the feed holder; means for releasably attaching the cap or cover to the feed holder and an attachment means for supporting the feed holder.

Abstract: A selective pet feeding system comprising a gas or air blowing device that discourages a pet that should not eat at that station by gently blowing a stream of gas or air at the face of said pet. The pets are identified through the commonly understood technology of Radio Frequency Identification (RFID) and where a RFID fob attached to their body programmed with a code that is read by the selective feeding station.

Abstract: The present invention is a disposable wild bird feeder with the features that make it safe and easy to use but protected from being reused. A transparent reservoir containing bird seed is connected with a feeding base. The feeding base is threaded to an adaptor portion of the reservoir. A locking means between the internal threads of the adaptor portion and the external threads of the feeding base discourages the assembled wild bird feeder from being taken apart and refilled. The wild bird feeder converts from a first storage and shipping configuration to a second feeding configuration by partially unthreading the feeding base from the adaptor so bird seed is supplied to the bottom portion of the feeding base. A plurality of perches are supported by the feeding base. The perches are moved from a stored position to approximately a horizontal deployed position when the second feeding configuration is realized.

Abstract: A livestock feeder is provided wherein the seams of the feeder are detachable/re-attachable so as to break away from the livestock in case of entanglement. The break away feature may be applied to various configurations of livestock feeders. The breakaway feature is provided so as to avoid injury to the livestock and also make the livestock feeders easier to clean. Seam attachment means include, but are not limited to, hook and loop fasteners, adhesives, zippers, snaps or buttons.

Abstract: A bird bath has an outer bowl with a reservoir for holding water and an inner bowl floating on the water in the reservoir and supplied with water from the reservoir for bird drinking and bathing.

Abstract: The present invention relates to a method of determining the presence of an infectious agent in one or more test animals. The method includes providing a cage housing a sentinel animal, the cage including a plurality of inlets to allow flow of air into the cage through each of the inlets; providing a plurality of cages each housing a test animal, each cage including an outlet to allow air to flow from the cage; connecting the plurality of cages each housing a test animal to the cage housing a sentinel animal so as to allow air to flow via the outlet of each cage housing a test animal into the cage housing a sentinel animal via an inlet on the cage housing a sentinel animal; and screening the sentinel animal for infection by the infectious agent after a period of time sufficient for the sentinel animal to be infected from one of the test animals, wherein infection of the sentinel animal is indicative of the presence of the infectious agent in one or more of the test animals.

Abstract: A method and apparatus is provided for raising poultry, such as chickens, for food production. In a first embodiment, the method includes the steps of: providing a facility for housing the poultry, providing at least one light-absorbing ventilation fan associated with the facility for ventilating the facility, exposing an interior of the facility to natural light cycles of an outside environment for a first period and regulating light cycles of the interior for a second period, thereby mimicking daylight duration variation representative of seasonal changes for stimulating sexual development of the poultry. In a second embodiment, the method includes the steps of: providing a facility for housing the poultry, providing at least one light-absorbing ventilation fan associated with the facility for ventilating the facility, limiting exposure of an interior of the facility to light to produce a brown-out effect therein for enhancing physical development of the poultry.

Abstract: The present invention relates to a carrier for pets, namely a carrier having flexible side walls and a bottom having a padded insert for receiving the pet and comfortably transporting it in a soft, darkened space. The inventive container has two straps that serve to stabilize the carrier and permit the individual carrying the animal to easily strap the container over its shoulder or grip the straps in its hand. Inside the carrier, the padded insert is removably secured to the bottom and the side walls flexibly lift up from the bottom, enclosing the animal within the walls and safely in the cushioned insert.

Abstract: A pet crate having a top, a bottom, and a cage between the top and bottom. The cage can be engaged to and disengaged from each of the top and bottom. When engaged to the top and bottom, or when disengaged from either one or both of the top and bottom, the cage is endless and can safely hold a pet therein. When disengaged from the top and bottom, the cage is foldable into a closed, endless and flat configuration such that the cage can be stored between the top and bottom such that the crate as a whole in such stored configuration is generally flat. When disengaged from the top and bottom, the cage is foldable out into a fence configuration by disconnecting two ends of the cage.

Abstract: A limiting device (9) for limiting the freedom of movement of a standing cow in a lying box (1) in a loose house for keeping cattle, in a direction towards a front end (8) of the lying box. The limiting device (9) is intended to be placed near the front end, on and projecting from the bottom (11) of the lying box. At least one top part (13) of the limiting device is movable between a limiting position operatively projecting from the bottom for limiting the freedom of movement of the standing cow towards the front end of the lying box, and a releasing position, for leaving, for the purpose of the front legs of the cow lying down, at least a part of the space the limiting device occupies in the limiting position. A lying box and a loose house with such limiting device are also described.

Abstract: Child safety tether with a care giver vest, a child vest, a care giver tether attachment member, a child tether attachment member, a care giver tether attachment member track, a child tether attachment member track, a tether, a tether spring reel, a plurality of track to vest attachment members and a track attachment buckle. Each tether track is fixed to each vest. The tether spring reel is attached to the care giver tether attachment member. The care giver tether attachment member is slidably fixed within the care giver tether attachment track. The tether is attached at one end to the spring reel and at the other end to the child slidable tether attachment member so that when either the child or the care giver turns or rotates in place, the tether attachment members will slide within the tether attachment member tracks thereby reducing the possibility of tether entanglement.

Abstract: A system and a method for controlling a pump in a recirculating hot water system is provided. In one embodiment, the invention relates to a method for controlling a temperature of water in a recirculating hot water system including a storage tank for storing heated water, a recirculation conduit including a supply conduit for supplying the heated water to users via a plurality of outlets having a first outlet and a last outlet and a return conduit for returning an unused portion the heated water to the storage tank, a pump for circulating the heated water, the pump disposed along the return conduit, the method including measuring, at a point along the recirculation conduit, a temperature of the heated water provided from the storage tank, and controlling a speed of the pump, disposed along the return conduit, based on the measured temperature.

Abstract: Improvements in the device and method of providing portable electrical, hydraulic and compressed air power to a variety of job site applications requiring the use of hand held industrial tools.

Abstract: A hydrogen augmented crankcase ventilation system includes hydrogen injection to facilitate the combustion of crankcase fumes, for example blow-by, in the engine. The system preferably includes a hydrogen generation system as a hydrogen source and introduces the hydrogen into the engine through the engine's fuel injection system. A fumes hose connects the crankcase to the air intake, and a clean air hose connects a clean air source to the crankcase. An orifice or a vacuum regulator cooperates with the fumes hose and may be included to regulate crankcase vacuum. A filter resides inline with the fumes hose to capture solids or liquids which enter the fumes hose from the crankcase, and a drain hose drains captured liquid back into the engine. A back flow preventor may be included to cooperate with the clean air hose to prevent a back flow of crankcase fumes through the clean air hose.

Abstract: An apparatus for charge air cooling for an internal combustion engine of a motor vehicle, comprising a first heat exchanger for charge air high-pressure cooling, and at least one second heat exchanger for charge air low-pressure cooling, and at least one first connecting element for connecting a first heat exchanger and the at least one second heat exchanger together, at least one coolant supply conduit for supplying at least one heat exchanger with coolant, at least one coolant discharge conduit for the discharge of coolant from at least one of the heat exchangers, wherein the at least one coolant supply conduit and the at least one coolant discharge conduit are arranged substantially completely in the at least one first connecting element.

Abstract: A multiple cylinder engine cooling apparatus includes a bottom wall of a cylinder head, a lower end of a spark plug inserting cylindrical wall, a lower end of an inlet port, an exhaust port, and a water jacket. A plurality of combustion chamber forming recesses are formed in the cylinder head to line up in a longitudinal direction parallel to an axial direction of a crank shaft. The spark plug inserting cylindrical wall extends from each recess upward in a direction opposite to a combustion chamber. The inlet port extends from each recess laterally in one direction perpendicular to the longitudinal direction. The exhaust port extends from each recess laterally in the other direction. The water jacket is formed in the cylinder head to cool the bottom wall of the cylinder head, the lower end of the spark plug inserting cylindrical wall, the lower end of the inlet port, and the exhaust port. The water jacket includes a first water jacket portion and a second water jacket portion.