Abstract: The disclosure relates to a hydraulic control block for controlling a pressure medium supply of a hydraulic cylinder of a hydraulic spindle. The hydraulic control block includes a generic hydraulic switching structure electively configurable in each of a plurality of specific hydraulic switching structures, each of the plurality of specific hydraulic switching structures having a respective hydraulic cylinder with a number of piston areas which differs from a number of piston areas in the respective hydraulic cylinders of each of the other of the plurality of specific hydraulic switching structures.

Abstract: An apparatus for aftertreatment of exhaust gases of an internal combustion engine, with a housing through which the exhaust gas can flow from an inlet to an outlet, a flow path spatially delimited in a radial direction and through which gases can flow in an axial direction arranged inside the housing, a catalytic converter in the flow path, and a heating element arranged in the flow path for electrically heating the exhaust gas. An annular gap through which gases can flow is formed between the flow path and the inner wall of the housing. The distribution of the exhaust gas mass flow between the flow path and the annular gap is influenced by a control element.

Abstract: An actuator includes: a casing; a pressure reducing valve and a piston. The pressure reducing valve is provided in the casing to reduce a pressure of a driving fluid supplied from an outside of the casing to a predetermined level. The piston is provided in the casing to form a pressure chamber together with the casing. The piston is driven by the driving fluid that has been pressure-reduced to the predetermined level.

Abstract: A liquid pressure rotary machine in which a rotation delay of a retainer with respect to a cylinder block is reduced and contact of pistons placed between the retainer and the cylinder block with peripheral members is suppressed is provided. A piston pump includes a rotation shaft, a cylinder block, piston heads, piston rods, a retainer, a swash plate, and a tilt adjustment mechanism. When the tilt adjustment mechanism swings the swash plate, a discharge amount of the piston pump becomes variable. The retainer to be rotated together with the piston heads and the piston rods is supported by a retainer bushing provided in the rotation shaft. By engaging ball pins of the retainer bushing with spherical surface pin grooves of the retainer, the retainer and the retainer bushing are integrally rotatable about the center axis of the rotation shaft and the retainer is swung about the spherical surface center.

Abstract: A downforce controller for an agricultural implement having a double-acting hydraulic cylinder. The cylinder is configured to be coupled to an agricultural row unit and an agricultural toolbar for transmitting a net downforce between the agricultural toolbar and the agricultural row unit. A first pressure in a first chamber of the cylinder and a second pressure in a second chamber of the cylinder have counteracting effects on the net downforce. A manifold coupled to the cylinder is in fluid communication with the first chamber. A pressure control valve coupled to the manifold is in fluid communication with the manifold and the first chamber.

Abstract: An apparatus for transitioning at least a first vacuum motor and a second vacuum motor between an air series configuration and an air parallel configuration is provided. The apparatus comprises a controllable switching valve, a first check valve, a second check valve and a plurality of chambers. The switching valve is positioned in communication with the first vacuum motor air outlet and the second vacuum air inlet. The apparatus is configured so that when the switching valve is opened the vacuum motors are configured air series and when the switching valve is closed the vacuum motors are configured air parallel. The first and the second check valves are opened or closed by pressure differential between chambers.

Abstract: A hydraulic valve stack for a work machine is disclosed. The hydraulic valve stack has a base with a first mounting surface and a second mounting surface. The base is connectable to the work machine and has at least one fluid passageway extending through the base from the first mounting surface to the second mounting surface. The hydraulic valve stack also has a permanent valve assembly configured to control a permanent function of the work machine and an optional valve assembly configured to control an optional function of the work machine. The permanent valve assembly is connectable to the first mounting surface of the base, while the optional valve assembly is connectable to the second mounting surface of the base. Each of the permanent and the optional valve assemblies have at least one fluid passageway in communication with the at least one fluid passageway of the base.

Abstract: A fluid power operative instrumentality having an electro-fluidic control unit, which is provided with a plurality of electrically activated control valves having 2/2 valve functions. On the control unit different operative units may be selectively mounted, the control valves being able to be operated by means of electronic control circuitry in a manner matching the mounted operative unit.

Abstract: A fluid power operative instrumentality having an electro-fluidic control unit, which is provided with a plurality of electrically activated control valves having 2/2 valve functions. On the control unit different operative units may be selectively mounted, the control valves being able to be operated by means of electronic control circuitry in a manner matching the mounted operative unit.

Abstract: A valve actuator with an instrument mounting pad and a manifold in a power module and yoke combination for mounting a valve controller instrument without tubing or mounting brackets. A cover encloses the feedback linkage between the actuator and instrument. The actuator includes a second instrument mounting pad and manifold so the power module is reversible to accommodate fail-safe opened or fail-safe closed valve conditions. A valve actuator and instrument combination is no higher than the actuator alone.

Abstract: A device and method for selecting a control mode in a power construction vehicle is disclosed. The device has a control mode select switch which selects a function for setting new matching relations between the control levers and the proportional control valves. A controller sets the new matching relations and stores the new matching relations, and controls the actuators in accordance with the new matching relations. In the control mode selection method, one operational motion of an actuator is primarily selected and displayed on a display means. Thereafter, a voltage signal indicative of a levering angle of a control lever associated with the selected actuator is output, thus setting a new matching relation between the control lever and an associated proportional control valve. The above process is repeated in order to continuously set and store new matching relations between the control levers and proportional control valves associated with the other actuators.

Abstract: A pneumatic actuating drive (1, 61) for final control elements comprises a drive housing (6) and a drive component (15) movable therein, to which the drive component (15) is attached a drive element (24) that exits from the drive housing (6) and that can be moved together with the drive component (15), and which has the function of actuating the actuator (1, 61) and which divides the drive housing (6) into a pressure chamber (16) and a reset chamber (17) with a reset element (19, 20) that acts on the drive component (15). The actuating drive (1, 61) furthermore comprises a position controller (41) whose output (48) merges into an internal supply duct (49), which is connected to a transfer connection (35, 62) on the reset chamber side on the drive element (24), whereby the drive element (24) exhibits an air duct (30), which originates from the transfer connection (35, 62) and merges into the air duct (30).

Abstract: A pneumatic control drive 1, 51, 71 for control devices, in particular control valves, comprises a drive housing 5 and a drive member 11 displaceable therein and to which is affixed a drive element 18 displaceable together with said drive member 11 to actuate the control device and exiting the drive housing 5, said drive member dividing the drive housing 5 into a pressure chamber 12 and a reset chamber 13 with a reset member 15, 16 loading the drive member 11. A position controller 3 is adjacent to one of the chambers (13) and communicates through an inner air-supply duct 30, 28, 55, 74 with the pressure chamber 12, a vent duct 35, 58, 76 issuing from the reset chamber 13 toward a vent aperture. In the invention, the drive element 18 comprises an air-supply duct 24, 25 issuing at the side of the drive member 11 away from the position controller 3 into the pressure chamber 12 there.

Abstract: A mini-size universal hydraulic excavator capable of performing independently many operating processes, such as digging, pushing, grabbing, drilling and chipping, having essentially three main sections, namely, a chassis carrying traveling device pivotally connected with an earth-moving means, a complete swivel upper carriage provided with a power generator and a driver's seat, and an excavating arm having a boom, a bucket arm, and a bucket. A hydraulic chipper can be connected to the main machine without the necessity of removal of the bucket and the earth-moving means, so that chipping and site clearing can be carried on simultaneously solely by one single machine. A backhoe bucket carrying a scraper employs a multi-bar linkage mechanism having a bucket body, a scraper, and a bucket arm so that the bucket can have sufficient bucket capacity in a relatively greater excavating revolving angle range.

Abstract: A tube jetting apparatus for cleaning the interior surfaces of tubes such as those in heat exchangers. The jetting apparatus includes a hydraulically actuated lance and piston assembly in a housing. High pressure fluid is directed through ports in the lance and also directed across the piston to actuate the lance and piston assembly while providing high pressure fluid to a jetting nozzle on the lance. The speed of the lance and piston assembly is controlled and jetting action occurs on both the outward and return strokes. On the return stroke, a pressure relief system is provided to relieve the system pressure through a differential pressure relief valve. A stroke limiter is provided which utilizes a collet for grippingly engaging the lance at a predetermined location thereon while minimizing damage to the surface of the lance.

Abstract: A fluid-operated actuator (2) is connected to a pumping unit (12) through a control unit (10) in which are mounted control valves (30,32) for regulating the movements of the actuator. The control valves communicate with the actuator and the pumping unit through conduits in replaceable adaptor plates (60a,60b,60c). By changing the adaptor plates, different operating modes of the actuator can be selected. The pumping unit is carried on the control unit through a rotationally adjustable connection to permit it to be mounted upright although the orientation of the actuator and control unit may vary.

Abstract: A pilot valve for connecting a source of fluid under pressure to an actuator where the pilot valve may be connected to the actuator in any of 360.degree. of rotation so that the fluid connections may be made from any desired direction. Further disclosed is a coupling adapter joining the pilot valve to the actuator with passages so arranged in the adapter that 180.degree. rotation of the coupling adapter reverses the fluid flow connections between the pilot valve and the actuator simultaneously exposing indicia indicating the condition. Still further disclosed is a spring return manual override that is slotted to enable operation by a coin and has a mating slot in the pilot valve body allowing locking in the override position by insertion of a coin or similar device. A ball valve actuator is described as an actuator device.

Abstract: A device carrying air reservoir means and a compressor is adapted to be mounted on a conventional four cycle internal combustion engine to convert it to operation by air pressure. The device has air pressure reservoirs, valves and conduits for delivering air pressure to the cylinders of an engine in timed sequence. After each power stroke air is exhausted to the inlet of a compressor carried by the device which delivers the compressed exhaust air back to the reservoirs and in doing so adds to the exhaust air energy substantially equal to the useful work output of the engine.

Abstract: A diesel-engine pile driving hammer provided with interchangeable rams for use in a single, outer, cylindrical casing. A large diameter hole or orifice is provided in the casing between a pair of an array of alternate orifices which are capable of being plugged. The larger orifice or alternate orifices provide an air inlet-exhaust port or ports of sufficient dimension to enable all of the exhaust gases of combustion to be expelled in the time it takes a ram of designated weight to travel its upward stroke in the casing and to vary the swept volume of air introduced into the combustion chamber in the casing so that different weight, interchangeable rams may be accomodated in the same outer cylindrical casing to obtain prescribed impact energy values.

Abstract: A pressure-medium connection between a valve block and a load which has at least one double-acting pressure-medium motor. The valve block and load each have two connecting openings for supplying the pressure-medium motor. An interposed sealing plate has through openings in the form of channels which extend in the plane of such sealing plate for connecting the resepctive openings of the valve block housing and load housing. The connecting openings of the valve block housing are offset with respect to the connecting openings of the load housing. In a first operating position of the sealing plate, the control channels therein connect the first connecting openings of the valve block housing and load housing and also connect the second connecting openings of the valve block housing and load housing.

Abstract: A Pneumatic impact drilling tool, particularly useful as a downhole pneumatic drill, includes a housing structure adapted to be connected to a string of drill pipe and supplied with compressed air therethrough. A hammer piston reciprocates in the housing structure along flexible feed and exhaust tubes. Compressed air is directed alternately to the upper and lower ends of the hammer to effect its reciprocation in the housing. The hammer is operable to strike an anvil bit member repeatedly to effect a drilling motion. At the upper end of the housing there is provided a removable annular plug member surrounding the tubular support in which the feeder tube is positioned. The annular plug member defines the volume of the space above the hammer piston and is related to the size of the feeder tube so that the feeder tube and plug member together determine the volume of air utilized at any selected air pressure and the timing of operation of the hammer position.

Abstract: An arrangement for modifying a plow blade power unit of the type positioned between the mounting frame on the front of a vehicle and a plow blade lift arm, to a unit for creating pressurized fluid from a remote location. Modification enables a basically similar power unit to be utilized in both remote and direct operational environments with only minor substitution of interchangable parts. A piston-cylinder unit which enables direct lifting of a plow blade is replaced by a modified, but similar, cylindrical element for use in indirect lifting of a plow blade by fluid under pressure.

Abstract: A valved conversion element for connection to a source of compressed fluid such as air or vapor and to a cylinder in an internal combustion engine. A sensor is provided which communicates with the pressure conditions in the cylinder served so that repetitive power impulses drive the piston in the cylinder as in normal operation of the internal combustion engine. The disclosure contemplates one valved element per cylinder in the engine and that the conversion be achieved by the manifolding of gas, vapor or fluid power to all cylinders through the conversion elements. Each of the conversion units is connected to the cylinders by means replacing the spark plugs of existing engines. Cyclic rate and power are adjustable by valve means controlling the quality and quantity of input fluid, such as air.