Abstract: A load handling vehicle equipped with a load handling device comprises a pair of reinforcing frames attached to opposite sides of the vehicle body, a steering panel, a front cover covering the space under the panel from the front and a protective device covering the operator's seat and including a pair of opposite front posts connected to the frames in front of the seat. Each of the front posts comprises a lower post member extending upright from the frame and positioned in the vicinity of of the front cover, and an upper post member removably attached to the lower post member. The steering panel and the front cover are attached to the pair of lower post members and can therefore be fixed in place by a simple arrangement and yet with increased strength. When unnecessary, the protective device is removable with the panel and the cover fixed in place.

Abstract: A front mower includes a cutter unit having ground contact wheels and liftably attached to the front of a vehicle by a link assembly and a hydraulic piston-cylinder assembly for lifting or lowering the cutter unit. The link assembly includes a pair of first links each having a rear end pivoted to the vehicle and a pair of second links each having a front end pivoted to the deck of the mower, the front end of each first link being inflexibly and removably fixed to the rear end of each second link by a locking pin. A spring is provided between each first link and the vehicle. The cutter unit can be attached to and removed from the vehicle without removing the spring.

Abstract: An apparatus for controlling the posture of the work implement of a loader comprises a boom supported by a boom pivot on a mast secured to a vehicle body and movable upward and downward by a boom cylinder, first and second arms supported by an intermediate portion of the boom and pivotally movable relative to each other, a pivotal member pivoted to the boom by the boom pivot, a first connecting member operatively connecting a point on the pivotal member away from the pivoted point thereof to the first arm, a second connecting member connecting the second arm to the work implement at the forward boom end, an engaging portion for engaging the second arm with the first arm when the implement is moved by an implement cylinder in the scooping direction approximately into a specified posture, and an interlocking member operatively connecting the pivotal member to an implement control valve for the implement cylinder so that the valve is operated in the dumping direction by the movement of the pivotal member with th

Abstract: In a forced air-cooled engine, a local high temperature portion is adapted to be cooled effectively so that thermal distortion and thermal breakage of a cylinder and/or a cylinder head caused by such a local high temperature can be avoided. To prevent thermal distortion of the engine, there is provided a cylinder jacket, for cooling part of an engine cylinder in a partition wall between the cylinder and its push rod chamber. As means for preventing the thermal distortion of the cylinder head, there is provided a cooling air passage in a cylinder head, and there is also provided a head jacket for oil-cooling around a divided combustion chamber so as to circulate oil through the head jacket and a radiator. Local high temperature portions in the cylinder and/or the cylinder head can thus be oil-cooled effectively.

Abstract: A transmission for a tractor comprising a power takeoff line change speed gear mechanism, propelling line change speed gear mechanisms and a backward and forward drive switching mechanism. The propelling line change speed gear mechanisms include a main change speed mechanism, an auxiliary change speed mechanism and a front wheel change speed mechanism. The power takeoff line change speed mechanism, and the main and auxiliary change speed mechanisms somewhat encircle a longitudinal center line transversely of the transmission. The backward and forward drive switching mechanism and the front wheel change speed mechansim are juxtaposed in a region immediately forwardly of the change speed machanisms B, C and E.

Abstract: A propelling drive transmission structure for a walking operator type lawn mower having vertically adjustable front and rear wheels and a main frame supporting a cutting blade housing between the front and rear wheels. The transmission structure comprises a change speed device disposed above a rear axle for changing speed of engine drive for transmission to the rear axle. The change speed device includes an output shaft operatively connected to the rear axle through a rotary shaft and bevel gears. The rotary shaft is slidable relative to the output shaft to vary spacing between the output shaft and the rear axle.

Abstract: The present invention relates to an accumulator fuel injector for a diesel engine, the device including first and second accumulators which are connected through a check valve and a relief valve. Fuel pressurized and delivered by a fuel injection pump is charged into the first accumulator so as to increase its pressure abruptly. When the fuel pressure in the first accumulator reaches a selected relief pressure, the fuel is charged into the second accumulator through the check valve and is accumulated therein. When fuel injection is started by opening of an injection valve, the fuel accumulated in the first accumulator is injected through the injection valve and at the same time the fuel accumulated in the second accumulator flows out to the first accumulator through the relief valve so as to also be injected through the injection valve.

Abstract: A device for attaching a front loader to a tractor by removably mounting each of a pair of boom supporting masts on a mast support fixed to the tractor body and removably fixing the front end of each brace extending forward from the mast to a brace fixing member secured to the front end of the tractor body. One of the lower end of each mast and the upper side of the mast support has a projection, and the other of these parts has a recessed portion for receiving the projection. The mast is pivotably supported by means of the projection and the recessed portion from below while being thereby restrained from moving longitudinally of the tractor body. A guide on the brace end and the fixing member coact to hold the brace end in position. The mast and the brace are fixed in position by a lockpin. The loader can be removably attached to the tractor with ease and high rigidity.

Abstract: In a swirl chamber type combustion chamber for a diesel engine having an injection passage provided for to guide the stream of combustion gas gradually spreading right and left during the injection from the swirl chamber to the main combustion chamber, a top surface of a piston head is provided with a concavity formed in such a configuration as gradually spreading right and left as progressing from the inlet end to the outlet end thereof, for example like an unfolded-fan. And the inlet end of the concavity is located so as to face to the outlet of the injection passage. The stream of combustion gas injected from the injection passage is to be guided so as to be sufficiently diffused in the main combustion chamber by the concavity.

Abstract: A steering apparatus for a front wheel drive tractor comprising, at each of opposite lateral sides thereof, a front axle, a front axle case housing the front axle, a kingpin, a transmission case provided in an outer end region of the front axle case to be pivotable about the kingpin, and a front wheel attached to the transmission case and including a hub shaft. The kingpin is operatively connected to the front axle through a bevel gear transmission, and the hub shaft is operatively connected to the kingpin through a bevel gear transmission and a planetary reduction mechanism. The front wheel has a substantially zero camber angle, and the kingpin is inclined such that a lower portion of the transmission case disposed inwardly with respect to a center of the tractor is substantially contained inside a rim of the front wheel.

Abstract: A filter for molten metal having a high melting point is in the form of a net woven of glass yarns formed by twisting a multiplicity of glass fibers together. The glass fibers contain at least 75 wt. % of SiO.sub.2 and are thermally cured at a thermal shrinkage of 2.5 to 15%. The thermal shrinkage is expressed by (l-l')/.times.100 % wherein l is the length of the fiber before the thermal cure, and l' is the length of the fiber as thermally cured.

Abstract: A transmission for a tractor comprising a propelling line for transmitting an engine output to drive wheels, and a power takeoff line for transmitting the engine output to a working implement attached to the tractor. The transmission further comprises a torque converter including a casing connected to an engine output shaft and an input shaft of the propelling line, and a turbine liner and a lockup clutch connected to an input shaft of the power takeoff line. The propelling line includes a first hydraulic clutch for transmitting the engine output in forward rotation and a second hydraulic clutch for transmitting the engine output in backward rotation, engine output transmission through the propelling line being broken when the first and second hydraulic clutches are disengaged. The power takeoff line includes a power takeoff hydraulic clutch, and a power takeoff gear disposed upstream of the hydraulic clutch for driving hydraulic pumps attached to a transmission case.

Abstract: A four wheel drive vehicle comprising dirigible front wheels and nondirigible rear wheels. Drive of an engine is transmitted to the front and rear wheels through a propelling drive transmission for producing at least two, high and low, speeds, a front wheel change speed mechanism, and a rear wheel change speed mechanism. The front and rear wheel change speed mechanisms are controlled by a control device to produce a high speed state with the front wheels accelerated when a steering angle of the front wheels exceeds a predetermined angle and the propelling drive transmission is in a low speed position, to produce a low speed state with the front wheels accelerated when the steering angle of the front wheels exceeds the predetermined angle and the propelling drive transmission is in a high speed position, and to produce a standard state in which the front and rear wheels are driven at the same speed when the steering angle of the front wheels is below the predetermined angle.

Abstract: A four wheel drive vehicle comprising an engine, a transmission connected to the engine, a front wheel drive line, a rear wheel drive line, and an automatic switch mechanism for operatively connecting the front wheel and rear wheel drive lines to the transmission to selectively provides a two wheel drive mode and a four wheel drive mode. The front wheel drive line and the rear wheel drive lines are constructed such that front wheels are driven at a lower speed than rear wheels. The automatic switch mechanism includes an input portion connected to the transmission, a first output portion connected to the front wheel drive line, a second output portion connected to the rear wheel drive line, and a clutch for connecting the first and second output portions to the input portion. The clutch is operable to disconnect the first output portion from the input portion upon receipt of a torque exceeding a predetermined value.

Abstract: A static casting method for a hollow cast product using a mold with bottom comprising a top lid, a core and an outer mold section, the core being attached to the top lid and disposed inside the outer mold section. The outer mold section includes a lateral mold section and a lower mold section. The lateral mold section is formed at its inner peripheral wall portion with a composite cooling section by stacking chiller blocks and interposing therebetween refractory sands and at its outer wall portion with refractory sands. Cooling pipes include first and second pipes. A first pipe extends longitudinally through the refractory sands at the outer wall portion and a second pipe extends longitudinally through the inner wall portion in contact with at least a part of each of the chiller blocks, the first and second pipes being connected at their lower portions through the bend portion. The chiller blocks are cooled by water flowing in the second pipes. The entire casting cavity is first filled with molten metal.