Abstract: A change-speed maneuvering apparatus in a vehicle provided with a steering-wheel apparatus including a generally upright steering-wheel post, has a main change-speed maneuvering shaft assembly on one lateral side of the steering-wheel post, in parallel to it. On the other lateral side of the steering-wheel post, there is, also in parallel to it, a forward-and-rearward running-travel shiftover actuation shaft, and there also are interlocking levers which are pivotally supported on the forward-and-rearward running-travel shiftover shaft and which function to operatively connect the main change-speed maneuvering shaft to the drive power transmission mechanism.

Abstract: The present invention relates to a bag-like container, and a spherical container in which a latent heat accumulating meterial is enclosed, and a heat accumulating apparatus employing such containers. A heat accumulating mat material (A) is of a flat bag-like container divided into a plurality of sections, where a latent heat accumulating substance is enclosed. A spherical container (1A) has a heat transfer area enlarging portion of a recess (102), a groove (103). A solar heat accumulating greenhouse 2A has a radiator heat exchanging portion (2B, 2D), a heat accumulating tank 2C and a forced circulation liquid system.

Abstract: A device for removably attaching a front working implement to a tractor body comprises a bearing portion provided on each side of the front portion of the tractor body and a fitting portion provided on a front portion of each brace of the implement. The bearing portion and the fitting portion are tapered and engageable with each other in a vertical direction. The brace has a lever plate for holding the fitting portion engaged in the bearing portion and a bolt for fastening the lever plate.

Abstract: PTO-driving of a double-clutch-incorporated type transmission characterized in that the PTO-driving comprises a first gearing mechanism interlocking with a PTO main shaft, a second gearing mechanism interlocking with a running-travel main shaft, and a coupling means functioning to selectively drivably couple the said gearing mechanisms with a PTO transmission shaft.

Abstract: A splash lubricated over head valve engine provided with a gas inducing and a oil return passages both communicate the crank room and the rocker arm chamber, and with a breather disposed inside the rocker arm cover, wherein: the outlet opening of the gas inducing passage and inlet opening of the breather are disposed at opposite end portions of the rocker arm chamber, so as to make the flow of blow-by gas in the rocker arm chamber traverse across the rocker arms aslant.

Abstract: A hydraulic circuitry for a backhoe in which a hydraulic motor for driving one of right and left crawlers and a hydraulic cylinder for vertically oscillating a working arm assembly are connected in parallel to each other to a first pump through a multiplex valve assembly having a first center bypass, and a hydraulic motor for driving the other crawler, a hydraulic motor for slewing a platform, a hydraulic cylinder for flexing and stretching the arm assembly, a cylinder for actuating a bucket and a cylinder for actuating a dozer are connected in parallel to one another to a second pump through a further multiplex valve assembly having a second center bypass. The invention provides a circuit to permit fluid pressure from the first pump to enter the circuit connected to the second pump to provide confluence therein, when the dozer actuating cylinder connected to the second pump, for example, is operated while the backhoe is running.

Abstract: A stainless cast steel of ferrite-austenite two-phase structure having high corrosion fatigue strength and high pitting corrosion resistance containing in terms of % by weight, up to 0.1% C, up to 2.0% Si, up to 2.0% Mn, 22.0-27.0% Cr, 5.0-9.0% Ni, 1.1-2.5% Mo, 0.5-2.5% Cu, 0.5-2.0% Co and 0.5-2.0% V, the steel further containing, if desired, one or more kinds of 0.5-2.0% Nb and/or Ta and 0.01-0.5% Ti, the balance being substantially Fe and inevitable impurities.

Abstract: A mobile truck 10 furnished with power source and travel drive mechanism is set in a cargo oil pipe 48 to run inside to inspect and monitor the state of the inner surface of a pipe wall by means of its built-in magnetic flaw-detecting instrument 12 and video camera 14, so that the image signals taken by the video camera 14 may be reproduced and inspected on a television receiver 30 in the monitoring stations located aboard the vessel while the inspection data signals from the magnetic flaw-detecting instrument 12 may be recorded in a recorder 20 at the same time.

Abstract: Cultivating tines, each having opposite cutting edges, are pivotably supported by tine mount members on a tine shaft reversibly rotatable about a horizontal lateral axis. One of the cutting edges of the tine is retainable in a position rearward with respect to the direction of forward rotation, while the other cutting edge is retainable in a position rearward with respect to the direction of reverse rotation. When held in each of these positions, the tine is restrained by resistant force imparting means from being pivotally moved by a centrifugal force. The resistant force to be imparted by this means is smaller than the reaction to be produced when the tine is driven into the soil.

Abstract: A method of ultrasonic flaw detection of a pipe comprises comparing ultrasonic waves passing through a test piece portion with the arithmetic means of ultrasonic waves passing through portions adjacent each side of the test portion. The comparison is made around the entire periphery of a pipe, for example, an austenic heat resisting cast steel pipe used as a hydrogen manufacturing reformer tube. This method is free from adverse influence of macrostructures unevenly distributed in the peripheral direction of the pipe, and enables a quantitative grasp of flaws in a base material and a weld of the pipe.

Abstract: A work vehicle with a rolling-control mechanism, having a ground-engaging implement to be connected via a three-point link mechanism adapted to be free to effect adjustment with respect to the connection positions, has a sensor to detect slanting of the vehicle body. It also has electrical circuitry for correcting the control gain based on the detection results thereof, in response to the adjustment of the implement-attaching width and of the connection positions of three-point link mechanism. It may further be provided with a sensor and a control mechanism for effecting the control to minimize errors as are particular to using, as the rolling-control mechanism, torsional displacement in the three-point link mechanism.

Abstract: A control device capable of selectively controlling either one of two controlled members with the use of one control means.The control device incorporates a link and a lock member. The pivot structure of an arm between the link and the control means is improved, thereby to provide a smooth swing of the link.

Abstract: A front-wheel driving apparatus for use in tractors and the like has bevel-gear cases one each of which a front-wheel case is fitted for free rotation about a kingpin axis, the front-wheel case being adapted to support a front wheel and accommodate therein a bevel-gear train which is for incorporating the kingpin and the front wheel. Both upper and lower end portions of the kingpin are supported on the bevel-gear case via the respective bearings, and are provided with the respective bevel pinions as mounted thereon so as to exert axial thrusts on the kingpin in directions opposite to each other, and further with the respective thrust retainers as secured thereon for taking up any possible overall balance thrust. A hub base is consolidatedly incorporated in the front-wheel case, and on the hub base there is fitted, for free rotation, through a bevel gear fixture base a bevel gear which meshes with the lower bevel pinion on the kingpin.

Abstract: An excavating vehicle according to the present invention comprises an excavating apparatus rotated by a hydraulic actuator, said excavating apparatus being stopped automatically and smoothly at predetermined positions with a simple operation.

Abstract: There is disclosed a combine harvester in which a traveling change speed mechanism is automatically controlled in response to workload variations in order to maintain the workload within a predetermined range. In normal circumstances, controls are effected on the basis of an average value of deviations from a control target value of values of the load sampled a predetermined number of times. A change speed operation is immediately effected in an amount corresponding to the deviations when a difference between a value of variation of the sampled values from sampled values obtained a previous time from sampled values obtained earlier is greater than a predetermined value.

Abstract: A system for maneuvering steerable running wheels of a vehicle by means of a steering wheel via gear case equipped with input and output shafts and a gearing mechanism operatively interconnecting these shafts. On the vehicle, the output shaft is disposed outer than the input shaft, and the gearing mechanism is constructed with helical gears fitted respectively on the input and output shafts.

Abstract: A composite sleeve for use in a hot-rolling roll for H-section steel and channel steel comprises a working layer adapted to contact the material to be rolled and composed of two layers, i.e., a first outer layer made of one of adamite with graphite, spheroidal graphite cast iron and adamite having high resistance to sticking, and a second outer layer made of adamite or high chromium iron having high resistance to wear; and an inner layer adapted to be out of contact with the material and made of spheroidal graphite cast steel or spheroidal graphite cast iron having high toughness. The first outer layer covers the second outer layer, and the second outer layer covers the inner layer, the three layers of the first outer layer, the second outer layer and the inner layer being joined together by melting.

Abstract: A travelling vehicle equipped with obstacle detector sensors having, at the front of the vehicle body (1), a noncontact-type obstacle detector sensor (A) and a contact-type obstacle detector sensor (B), and a vehicle speed control device (20) adapted to automatically reduce the vehicle speed from a preset vehicle speed (v.sub.)0) to a predetermined vehicle speed (v.sub.1) when the noncontact-type obstacle detector sensor (A) detects an obstacle, adapted to automatically reset the vehicle speed to said preset speed (v.sub.0) when the sensor (A) does not detect the obstacle any more during such speed reduction, and adapted to automatically stop the travelling of the vehicle immediately when the contact-type obstacle detector sensor (B) detects the obstacle.

Abstract: An automatic running work vehicle adapted to automatically run straight along a predetermined boundary of a running area by being subjected to steering control based on the combination of parameters detected by a follower sensor for detecting the boundary and an orientation sensor for detecting the running direction.

Abstract: In a wrapping connector driving apparatus for agricultural machines including a chain reeved around sprocket wheels on two shafts, a tension adjusting device is provided on the slack side of the chain. A tightener bearing against the chain tensions the chain. A piston slidably fitting in an oil enclosing cylinder is pressed against the tightener by a resilient member. An abnormal load, when acting on the chain, is absorbed by the resilient member and the oil enclosed in the cylinder, which is provided with a passageway for releasing the increased internal pressure due to the abnormal load. When relieved of the load, the cylinder can be supplied with oil by way of a check valve. The tension on the chain is thus automatically adjustable.