Abstract: A construction machine typically comprises a mobile chassis having an arm vertically swingably mounted thereon, and a working accessory is detachably retained by the tip end of the arm. The arm has a link arrangement with pin holes at upper and lower portions thereof, and retaining grooves at upper ends thereof. The accessory has pin holes at front and rear portions thereof. Retaining elements such as rings or pin are fixed to the accessory. The retaining rings or pin are fitted in the retaining grooves to position the accessory so connecting pins can be inserted into the pin holes to connect the accessory to the arm.

Abstract: A temporary signal system wherein a pair of signal stands are installed at spaced locations adjacent a traffic restriction area. Each stand has at least red and green lights which light or flash for predetermined time periods to control vehicle traffic passing the restriction area. The signal stands include timers for counting actual time and providing the actual time, controllers for producing a flashing control signal for a selected red or green light upon reception of a time signal provided by the timer when the controller is in a flashing operation condition, and a lighting driver for permitting the selected red or green light to flash upon reception of the flashing control signal from the controller.

Abstract: A lifting apparatus has a movable chassis, a vertically movable platform disposed over the chassis and a vertically swingable, telescopic boom body connected between the chassis and the platform. The chassis, boom body and platform are arranged to form a Z-shape in side view. A detecting mechanism for monitoring the movement of the platform includes a winding drum, and a detection wire wound on the winding drum and having an end fixed to the platform. The boom body is extended at a rate correlated to the angle of inclination of the boom body so that the platform remains horizontal while moving vertically relative to the chassis.

Abstract: A heavy object, such as a portable toilet, is supported on a base. At least one wheel is mounted on the base for vertical movement between an upper position in which the wheel is supported above the lower surface of the base and a lower position in which at least a portion of the periphery of the wheel is below the lower surface of the base. The wheel is releasably held in one or the other of those positions. A handle is movably mounted on the object so that the object can be manually swung to permit the wheel to move between those positions.

Abstract: A raw sewage disposal apparatus, such as a portable toilet. The apparatus has a vessel with a first introduction pipe for feeding raw sewage into the vessel. The vessel is externally heated and contains heat holding bodies and an agitator so that the sewage can be heated to evaporate liquid therefrom while being agitated to break down nonevaporable substances into powder. A second introduction pipe is provided to circulate air through the vessel to remove the vapor and later the power therefrom. A deodorizing means including a catalyst, and a preheater for preheating the catalyst, are provided to treat the vapor to make it substantially odorless. A third introduction pipe is provided for supplying fresh air to the preheater. A dust collector is provided to collect the powder.

Abstract: A lifting apparatus has a movable chassis, a vertically movable platform disposed over the chassis and a telescopic boom body connected between the chassis and the boom body and arranged to form a Z-shape in side view. An angle detector gives a signal indicative of the angle of inclination of the boom body relative to the chassis. The boom body is extended at a rate correlated to the angle of inclination of the boom body so that the upper end of the boom body moves vertically relative to the chassis.

Abstract: A raw sewage drying apparatus having a first air tight casing, a rotatable drive shaft unit provided in the first casing, a stirring structure fixed to the drive shaft unit and having a plurality of blades for stirring raw sewage stored in the first casing, a plurality of elements such as balls contained in the first casing, the elements being heated by an electromagnetic wave, and a heating device provided outside the first casing for radiating an electromagnetic wave toward the first casing.

Abstract: A liquid evaporator includes an air-tight outer container containing liquid therein, the liquid container having support legs adjacent the bottom surface thereof; an inner container mounted on the legs for partitioning the interior space of the outer container, the inner container having a wall made of insulating material; and a heater fixed to an upper portion of the outer container and positioned inside the inner container. The liquid evaporator may be combined with a deodorizing device for forming a urine treating device, wherein the urine treating device includes a deodorizing housing having an upper portion provided with a secondary heater therein, a catalyst surrounding the secondary heater, a blower provided outside the housing, and a diffusion pipe provided at the upper portion of the housing.

Abstract: A lifting apparatus capable of eliminating a synchronous mechanism or an additional hydraulic cylinder with simple structure. The lifting apparatus comprises a mobile chassis, a platform disposed over the mobile chassis and capable of raising and lowering vertrically, and a lifting mechanism disposed between the mobile chassis and the platform and including a pair of hydraulic stretchable mechanisms connected to each other at the central portions thereof and capable of turning in an X-shape about the central portions thereof and stretchable in three stages.

Abstract: An earth-working machine includes a mobile chassis, a turntable rotatably mounted on the mobile chassis, a carriage rotatably mounted on the turntable in eccentric relation thereto, an earth-working mechanism mounted on the carriage, a source of a fluid pressure, a pair of first and second fluid motors for rotating the turntable and the carriage, respectively, and a fluid rate synchronizer composed of a pair of third and fourth fluid motors interconnected by a common output shaft for discharging amounts of fluid under pressure at a predetermined ratio, the source being operatively coupled to the third and fourth fluid motors, the first and second fluid motors being operatively coupled to the third and fourth fluid motors, respectively, whereby the turntable and the carriage will be angularly moved about their own axes at a constant angular displacement ratio.

Abstract: A folding scaffold unit having first and second pairs of poles each positioned perpendicular to the floor and parallel with each other, each pair of parallel poles being connected by connecting rods, scaffold boards being fixed to horizontal shafts at one ends thereof, the horizontal shaft being inserted into each pair of parallel poles and parallel with the connecting rods, the other horizontal shafts parallel with the horizontal shafts and rotatably connecting the other ends of the scaffold boards, a driving gear mounted on one of the pair of parallel poles for vertically swingably moving the scaffold boards, and gears fixed to the other horizontal shafts and having tooth flank meshing with each other.

Abstract: A crane vehicle has a movable vehicle body and a pair of outriggers expandable outwardly from opposite sides of the vehicle body in widthwise opposite directions and bearing against the ground to support load weight applied to the vehicle body in stationary state. A column is mounted vertically on the vehicle body and rotatable around its vertical axis. A hydraulic motor effects rotating movement of the column at variable rotation speed in clockwise and counterclockwise directions. A telescopic boom has a free top portion and a bottom portion mounted pivotably at a top portion of the column such that the telescopic boom is angularly movable along a vertical plane containing the vertical axis of the column. The telescopic boom is linearly movable along its axis. A first hydraulic cylinder effects angular movement of the telescopic boom at variable angular speed in upward and downward directions.

Abstract: A lifting apparatus having a base, a platform disposed above the base, and a vertically extendable mast arrangement coupled between the platform and base to effect vertical lifting of the platform. The mast arrangement normally includes a pair of vertically extendable mast assemblies disposed in parallel relationship, and each having plural vertically elongate masts disposed in vertical sliding relationship with one another. One mast is fixed to and projects upwardly from the base, another is fixed to the platform, and at least one additional mast is vertically slidably coupled therebetween. Each mast has sequencing structure associated therewith for requiring that the individual masts be vertically extended in a controlled sequence, and also has a locking structure for vertically fixedly coupling adjacent masts together when one is vertically extended relative to the adjacent mast.

Abstract: A lifting apparatus including a chassis having front and rear ends, and a drive unit for moving the chassis in forward or rearward directions. A turntable is mounted on the chassis for horizontal turning movement between front and rear positions. Boom assembly is mounted on the turntable and has a bucket mounted adjacent the free end thereof. An operating mechanism including an operator-actuated driving member is mounted on the bucket for controlling the forward and rearward traveling direction of the chassis. The driving member is movable in opposite first and second directions relative to the boom assembly for respectively causing forward and rearward travel of the chassis when the turntable is in the front position. A reversing arrangement reverses the controlling direction of the driving member when the turntable is in the rear position so that movement of the driving member in the first and second directions relative to the boom assembly respectively causes backward and forward travel of the chassis.

Abstract: A lifting apparatus having a least one set of paired stretchable boom assemblies which extend and contract, preferably in five stages. The boom assemblies are disposed between a chassis and a platform for raising and lowering the platform in interlocking relation with an operating mechanism, a guiding mechanism and a synchronizing mechanism. The lifting apparatus further includes a kick mechanism for auxiliarily supporting the load on the platform at a position where the platform is lowered about halfway. The kick mechanism has one end fixed to the chassis and the other end provided with a kick body capable of supporting the centers of the boom assemblies and provided with a detecting means for detecting contact between the boom assemblies and the kick mechanism.

Abstract: An excavator comprising a movable body, a boom mounted on the movable body, first hydraulic cylinders, an outer arm pivotally mounted on the boom, a second hydraulic cylinder mounted on a rear surface of the boom, an inner arm inserted into the outer arm and movable telescopically relative to the outer arm, a bucket connected to one end of the inner arm, a bucket connected to the tip end of the inner arm, a bucket cylinder provided between the bucket and a guide mechanism, the guide mechanism being slidably mounted on guide plates fixed to the outer arm, a third hydraulic cylinder connected to a base end of the outer arm and having a rod connected to a central portion of the inner arm for moving the inner arm relative to the outer arm, and a synchronizing device for moving the base end of the outer arm for a length corresponding to the distance the inner arm moves relative to the outer arm. A hook mechanism can be mounted at a front portion of the inner arm.

Abstract: A raw sewage drying apparatus, such as for a portable toilet. The apparatus has an outer casing with an opening in an upper portion thereof, and an outer cover for covering the opening. An inner casing made of a heat resistent material is housed in the outer casing. The inner casing has an opening in an upper portion thereof, and an inner cover for covering the opening. A heating device heats the inner casing. A rotatable drive shaft unit is provided in the inner casing, and a plurality of blades are fixed to the drive shaft unit for stirring the raw sewage stored in the inner casing. A plurality of heating balls are contained in the inner casing for heating the raw sewage.

Abstract: A raw sewage drying apparatus, such as for a portable toilet. The apparatus has an outer casing with an opening in an upper portion thereof, and an outer cover for covering the opening. An inner casing made of a heat resistent material is housed in the outer casing. The inner casing has an opening in an upper portion thereof, and an inner cover for covering the opening. A heating device heats the inner casing. A rotatable drive shaft unit is provided in the inner casing, and a plurality of blades are fixed to the drive shaft unit for stirring the raw sewage stored in the inner casing. A plurality of heating balls are contained in the inner casing for heating the raw sewage.

Abstract: A multi-stage boom having a plurality of boom members including a first boom member, at least one intermediate boom member and a last boom member, each being slideably inserted into its subordinate boom member to undergo telescopic expansion and contraction. An operating shaft is connected pivotably at its bottom portion erectly to a peripheral lower end portion of the last boom member, and a plurality of adjusting shafts are each disposed pivotably at its bottom portion erectly to a peripheral upper end portion of each boom member except the first boom member. A first tension cable is connected at its one end to a lower end portion of the first boom member, lead therefrom through an upper end opening of a subordinate boom member, turned forwardly at a top portion of an adjusting shaft disposed at a peripheral upper end portion of the subordinate boom member, and connected at its other end to an upper end portion of the first boom member.