Abstract: A hydrofoil (1) comprises a bottom (23) formed with two front and rear steps (3 and 4), and a strut (31) supporting a submerged hydrofoil (21) arranged between the two steps (3 and 4). The strut (31) can be switched between a storage state and a navigation state by its forward-and-backward rotation. A threshold value of dynamic lift (F) obtained by the hydrofoil (21) can be established arbitrarily, and the dynamic lift can be held to the set value by keeping the strut (31) in the navigation state correspondingly to the established threshold value of hydrofoil-dynamic-lift, thereby enabling the dynamic lift to be held at the established value during navigation. Moreover, based on draft (WL) or trim angle (TR) during the boat-berthing, a set value of hydrofoil-dynamic-lift and a set value of tilt angle of a propulsor (22) or a flap (22a) attached to the rear of hull can be accommodated.

Abstract: In a configuration comprising a hydraulic servo mechanism (6) having a spool (72) as a hydraulic valve for controlling the swash plate angle disposed within a body housing (3) of a hydraulic continuously variable transmission (1 or 2), and a manual operation member (20) for operating the hydraulic servo mechanism disposed outside of the body housing, a casing (33) is provided between the manual operation member and the body housing, a neutral position holding mechanism (11) for holding the neutral position of a movable swash plate and a rotation control mechanism (34) for controlling the maximum rotating angle of the movable swash plate are installed in the casing, and further an over-stroke absorbing mechanism (27, 40) for absorbing the over-stroke of the manual operation member is installed in an area ranging from the inside of the casing to the inside of the body housing, and moreover a spool operating member (41) moving by operation of the manual operation member is disposed movably almost integrally with

Abstract: In carrying out a crash-go-astern operation for switching operating means (2a) of a hydraulic clutch mechanism (100) provided to a marine reduction and reverse gear (1) from a forward setting (F) to a reverse setting in a stroke so as to abruptly stop in traveling ahead, a propeller speed (PN) is detected in neutral (N) halfway through the switching and initial fitting pressure (Po) of a reverse driving clutch (90) is calculated by using a map of the initial fitting pressure (Po) of reverse clutch pressure (Pr) formed according to the propeller speed based on a ship load (SL) in advance before switching to the reverse setting (R), the reverse driving clutch (90) is set at the calculated initial fitting pressure (Po) when the operating means is switched to the reverse setting (R), and then the reverse clutch pressure (Pr) is increased to a maximum value (Pm) as an engine speed (EN) increases.

Abstract: A speed change mechanism (1) constructed by connecting in tandem a hydraulic type speed change unit (17) having a plurality of hydraulic clutches (57, 58, 59) to be alternatively engaged and a hydraulic type speed change unit (20) having a plurality of hydraulic clutches (66, 67, 68) to be alternatively engaged, wherein a time-varying region (common slip region) is secured in which the two clutches slip in common such that during speed change, when the working hydraulic pressure in a clutch to be engaged is on its way to gradual increase, the working hydraulic pressure in a clutch to be disengaged lowers.

Abstract: A drive of inboard-and-outboard engines, wherein a drive gear unit (10) meshing with driven gears (25, 26) disposed on the upper end side of a drive shaft (28) disposed generally in vertical direction is formed slidably in a direction perpendicular to the drive shaft (28), whereby the drive gear unit (10) can be operated slidably from the outside of an upper unit (9) located at the top of an outer drive unit (5) disposed inside a hull (1).

Abstract: An engine working machine formed by storing a radiator and a cooling fan, for leading heat exchange air for the radiator, in a package together with an engine and a working machine. Wherein a storage space for the engine and working machine is separate from a ventilating port, which communicates with a space between the radiator and the cooling fan. The space is shielded by partitions from an air leading space to which air is led after being passed through the radiator by the cooling fan. A cooling air leading port for externally cooling the engine and the working machine is formed in a part of the package so that outside air led from the cooling air leading port passes the storing space and is exhausted from the ventilating port to the air leading space, to which air is led after having passed through the radiator.

Abstract: An object of the present invention is to restrict a part of intake flow which is apt to flow in a direction opposite to a counter swirl flow after colliding against a valve stem, and to produce an intense swirl while controlling a worsening of flow coefficient. A valve seat supporting annular stepped surface(14) is formed on an intake port outlet portion of a cylinder head (1), its inner peripheral edge is formed into a shape having an inner peripheral edge (4a) of a valve stem (4)for serving as a base circle, and a extending portion (15) projecting toward a side of a valve stem (11) is provided on a radial intake port inlet side portion. The extending portion (15) is formed into a mountain-like shape which widens from a top portion projecting toward the valve stem side to both peripheral sides and connects to the base circle at its foot ends; or into an arc-like shape; or into a trapezoidal shape.

Abstract: A torsional vibration measuring instrument which can be placed in a narrow space to measure the torsional vibration of a rotated object, is portable, avoids the possibility of occurrence of unrecorded data, stores recorded data in a detachable storage means, can be attached to a portable data analyzing/processing device, and can transmit the analyzed data. A portable torsional vibration measuring instrument (data logger) has a display means which can display at least the rotational speed and the torsional amplitude and a storage means in which recorded data are stored and which is detachably attached to the casing of the instrument. By attaching the storage means to a portable data analyzing/processing device (notebook personal computer), frequency analysis can be carried out and the recorded data stored in the storage means can be transmitted.

Abstract: A hydraulic circuit which, when applied to a turning excavator having hydraulic actuators for the working arms and the turning excavator body supplied with pressure oil from three pumps, can increase the operation speed of the booms and arms without providing a separate hydraulic pump to improve the work efficiency. During the individual driving, the boom cylinder (CY1) is supplied with a pressure oil from the first and third pumps (P1, P3), the arm cylinder (CY2) from the second and third pumps (P2, P3), the bucket cylinder (CY3) from the first pump (P1), and the turning motor (M) from the third pump (P3). During the simultaneous driving of the boom and arm cylinders (CY1, CY2), the arm is supplied with an operation speed increasing pressure oil from the third pump (P3). When the boom cylinder (CY1) and the turning motor (M) are simultaneously operated, a part of the pressure oil to the turning motor (M) from the third pump (P3) is supplied to the boom cylinder (CY2).

Abstract: In mounting an engine (vertical crankshaft internal combustion engine) to a frame (support) through a plurality of vibro-isolating members, at least one vibro-isolating member is a vibro-isolating member which is disposed at a position where the tension and rotating torque of a belt wound around an output pulley are substantially perpendicular to each other, or a vibro-isolating member disposed on a flat surface which includes an output shaft therein and is in parallel to the tension. Alternatively, the vibro-isolating members are disposed symmetrically through a flat surface which is in parallel to the output shaft and the tension of the belt and includes therein the center of gravity, or at least one vibro-isolating member is disposed on the flat surface. Also, an axis of the vibro-isolating members is oriented to correspond to a direction of the rotating torque.

Abstract: A method for controlling knocking of an internal combustion engine in which a knocking signal and a combustion signal are formed by directing vibrations detected by a vibration sensor through a primary filter circuit including a combustion filter circuit and a knocking filter circuit. The combustion filter circuit and knocking filter circuit each include a time gate and a filter. A ratio of a representative value of the knocking signal to a representative value of the combustion signal is obtained and used to decide whether knocking is occurring. The output voltage of control signals generated based on the decision that knocking is occurring may be varied as a function of the strength of the knocking and/or the frequency of the knocking.

Abstract: When a conventional swivel working vehicle is constructed such that a real part of a swivel body is not extended beyond a traveling device in order to improve an operability at a small site, a balance weight must he significantly increased in weight so as to prevent falling and tumbling of a machine body. In the invention, left and right core metal projections of a crawler are laterally offset from a center line of the crawler and right and left lugs are formed on an outer peripheral surface of the crawler. The lugs are formed to assume the same shape on the right and left sides or laterally symmetrical shapes or occupy the same area on the right and left sides, and to be symmetrically shaped about a center of rotation of the swivel body between the left and right crawlers of the machine body.

Abstract: A diesel engine having cylinders disposed in a V shape is constructed as compact as possible so that it can be adapted to either vertical and horizontal use without changing many parts. To this end, intake and exhaust cams and a fuel injection pump driving cam are disposed on a single camshaft to thereby obviate the necessity of a plurality of camshafts. In addition, a fuel pump, which has conventionally been disposed in a separate fuel injection pump case outside a cylinder block, is disposed inside the cylinder block. Furthermore, a fuel injection nozzle is disposed on an inner side of a pushrod and the pushrod and fuel injection nozzle are disposed between the cylinders, whereby a compact construction is obtained. Moreover, a governor device and a fuel injection pump are disposed on a side opposite to a crankshaft of the camshaft.

Abstract: Herein disclosed is an internal combustion engine in which a cylinder block at a side thereof opposed to a fly-wheel in the crankshaft direction has an opening covered with a side cover. A power take-off provided at a side of the side cover, and crankshaft has its one end supported by a bearing of the side cover. A lubricating oil pump is disposed in the cylinder block wall at the side of the fly-wheel.

Abstract: An air-cooled internal combustion engine and a structure of its air cleaner, a major object of which is to control noises emitted from various parts of engine and to minimize the overall size and dimensions of the engine. A cam shaft and a balancing shaft are arranged on an air cleaner side relative to a crank-shaft, a starting motor is arranged on an exhaust muffler side relative to the crank-shaft, shaft portions of the balancing shaft and the starting motor are located at a position lower than the crank shaft, and the exhaust muffler is arranged vertically above the starting motor, so that a center of gravity of the entire engine is lowered and engine noise can be controlled. Further, noises emitted from various parts of engine are controlled by positioning and shaping of an exhaust pipe, a shape of a cylinder head cover, and an arrangement and position of a fuel tank.

Abstract: A starting apparatus for a 4-cycle gasoline engine in which a necessary capacity of a starter motor is reduced by arranging that the engine can be started in a low revolution region of less than 350 rpm, and in which the starter motor is mounted around a starting clutch mechanism connected to a crankshaft. The starter motor is mounted to a recoil starter and connected to a rotary portion of the recoil starter in interlocking relation.

Abstract: A sealing device is provided for sealing facsimile receiving paper produced by a facsimile receiver device. The sealing device includes apparatus for taking in the facsimile receiving paper which is discharged from the facsimile receiving device, and a first folding arrangement for folding the paper in half. A second folding arrangement is provided for simultaneously folding the once-folded paper together with a sheet of envelope paper in a laminate arrangement. A sealing apparatus is provided to seal the envelope paper so as to enclose the facsimile receiving paper.

Abstract: A car height adjusting apparatus for a tractor, which lifts the car body by utilizing the driving power of the tractor and thereby without using a lifting device, such as a jack or a crane.