Abstract: A hand manipulated implement including an implement head, a handle and a connector rigidly connecting the handle to the implement head. The connector includes a plug which is inserted into the handle and which includes an exposed end for inserting into a collet base defined on the implement head. The connector plug and collet base each include an aperture wherein the apertures of the plug and base are aligned by ribs cooperating with grooves and slots at the lower ends of the plug and collet base. A clip is inserted through the aligned apertures to thereby hold the handle against longitudinal movement relative to the collet base. In addition, a collet is formed at an upper end of the collet base for frictionally engaging the handle and thereby further limiting movement of the handle relative to the implement head.

Abstract: An attachment for quickly, easily, inexpensively and efficiently cleaning brushes, combs, or other cleaning and grooming implements is disclosed which removes built-up dirt, lint, hair, and other unwanted foreign material which has been deposited by use of the implement near the base of toothed and bristled cleaning and grooming implements.

Abstract: A motor vehicle screen wiper apparatus comprises a screen wiper mounted on the upper end of a drive spindle, the apparatus including means for varying the inclination between the spindle axis and a reference axis which is substantially at right angles to the plane of the glass to be swept. The drive spindle is mounted for pivoting movement about at least one pivot axis, and the apparatus includes a cam mechanism which controls this pivoting movement of the drive spindle, so as to vary the inclination between the drive spindle axis and the reference axis as a function of the rotational position of the drive spindle about its own axis of rotation.

Abstract: A windshield-washing system with a wiper rod manufactured from flat strip steel of defined width and thickness that supports, at its free end, a bearing device with a bearing bushing for an articulation pin and oriented perpendicular to the width. For an economical production of such wiper arms with flawless functionality, the bearing device, consisting of a bearing bushing with laterally projecting fastening sleeve, is produced as a plastic part, pushed onto the free end of the wiper rod and locked in place thereon.

Abstract: A carpet cleaner device and method having feed and dispensing lines for applying and removing cleaning solutions from carpets, upholstery, floors and similar surfaces is disclosed. Connections to these lines, and also connections for electric power are mounted on a tray which is supported within the device during use. The tray may be pulled out from the device to expose the lines and connections for ready access during servicing, and/or repair.

Abstract: A multipurpose tool holder with a frame and pivoting ring fitting over the arm has a first handle to grasp when only the forearm is inserted and a second handle to grasp when the full arm is inserted, the pivoting ring allowing bending of the elbow. A tube with a keyless chuck serves as the second handle and receives the end of a tool.

Abstract: A safety device made of soft conformable cushioning material to be formed about the handle of manual work implements or tools to protect the hands of the user. The material is brightly colored to attract the eye and prevent the loss or misplacement of the tools. The material may be a polymer or rubber foam with or without a smooth outer surface. The user of any hand tool can modify the tool with the safety material by measuring, cutting and trimming to fit, then attaching the material to the handle of the tool by an adhesive.

Abstract: The present invention provides door handle bases for use in mounting door handles to doors. The door handle base has a base plate having a door handle side and an opposite door side, and a pair of tabs attached to the base plate. The pair of tabs are spaced apart from each other and each tab defines a fastener hole through the tab. A boss protrudes from each tab away from the door side of the base plate and contacts the door when the door handle is mounted to the door by the door handle base. The tabs are removably attached to the base plate by a frangible connection and are useable with multiple door handles and doors.

Abstract: A hinge has a cam having a securing mechanism for optionally affixing the cam to an object. The cam is rotatably coupled to the object along a first axis when the securing mechanism is not affixing the cam to the object. The hinge has a rotatable coupling mechanism to rotatably couple the cam to another object along an axis approximately parallel to, but offset from, the first axis. This invention provides the advantage of aligning two objects without requiring an exact initial positioning of the coupling mechanisms with respect to the two objects. Furthermore, the present invention allows for alignment without requiring multiple alignment attempts.

Abstract: A split lockable hinge for a baby bed containing a first hinge wing, a second hinge wing and a lock. An outer and inner legs respectively extend downward from the first and second hinge wings. The lock comprises a plurality of receiving holes on the first hinge wing, a plurality of hooking slots on the second hinge wing which can engage the engaging pin which can be inserted through the receiving holes and the hooking slots, and a plurality of elastic members. The first hinge wing is locked to the second hinge wing by the engagement of the engaging pin to the hooking slots of the second hinge wing by the elastic force of the elastic members. The operation of the split lockable hinge is easier and more stable. The structure of it is easily made. It is easier to arrange the cloth of the baby bed and the volume of the collapsed bed is reduced after collapsing because the rod members can rotate about their long axes. With the split lockable hinge, the jumping dismantling action will not occur.

Abstract: An aeromechanical individualizer for individualizing entities within a fiber sample includes a cylindrical rotating beater wheel, having a non-permeable cylindrical surface and having carding elements, such as pins or wire points, on the cylindrical surface. A cylindrical feed roller and feed plate supply the fiber sample to the beater wheel in the form of a beard at a first point along the rotational path thereof. A nozzle directs a gas flow across the feed plate and the beard such that fibers are dragged from the feed plate into engagement with the carding element. At a second point along the rotational path of the beater wheel there is a doffer for removing entities of the beater wheel. An enclosure surrounds the beater wheel and substantially prevents the ingress or egress of the gas except gas flow which enters via the nozzle at the first point and which exits at the second point.

Abstract: A flexible strap has a locking head and a free end. The strap is received in a passage in the locking head where it is engaged by a locking tab which is biased toward engagement with the strap as it passes into and through the passage. The locking tab prevents withdrawal of the tie from the locking head. The strap can be released for withdrawal from the locking head by moving the tab against the bias. An opening is provided in the locking head generally opposite to the location of the locking tab. The strap, throughout the major portion of its extension, has a width which is less than the width of the opening. The opening in the locking head is preferably provided with spaced shoulders in the area of the engagement between the locking tab and the straps serrations. An inclined lip is provided in the area through which the strap exits the locking head. The lip is angled such as to displace the strap from the normal exterior of the strap.

Abstract: A unique connecting pin is provided for splicing or lacing up conveyor belt egments. The connecting pin has multiple core pieces of defined lengths, aligned within the interior of a casing element. The casing element is constructed from a relatively soft material, which can give during operations, and the core pieces are aligned in such a way, that they extend through more than two coupling eyelets.

Abstract: An attachment fitting (1) for longitudinally grooved covering strips (12) consists of a holding member (2) of U-shaped cross-section, which in the middle area of its leg portion (21) has a mounting hole (3) and adjacent the ends of its leg portions (22) has bent holding straps (24). To obtain a fitting suited for being mounted at an inside edge, the holding member (2) is provided with transition portions (23) between the web portion (21) and the leg portions (22), which transition portions are symmetrical to the central longitudinal plane (E) and flatten the external corner portions.

Abstract: A plurality of closed structural metal cells are joined into an aggregate arrangement to form a composite material. Each cell encapsulates a fluid or fluid-like filler therein to provide controllable strength and shock-absorbing characteristics to the material. The resulting closed cell metal composite finds many advantageous uses including use as a prosthetic device, a casting, or an automotive component. The component material is elastically compliant or stiff, depending on the design, as well as lightweight and crush resistant. The material provides desirable physical properties such as thermal and electrical conductivity and shock-absorbing characteristics.

Abstract: A semiconductor wafer comprising a single crystalline lattice suitable for use in the manufacture of integrated circuits, namely computer chips and dies, wherein a diameter of the wafer is greater than approximately 150 millimeters and wherein the wafer includes a first hole extending through the wafer. The hole is adapted to facilitate handling of the wafer without directly contacting a surface of the wafer. The wafer preferably includes a primary flat and the first hole includes a flat side having a predetermined and known orientation with respect to the primary flat of the wafer. In one embodiment, the wafer further includes a guide hole formed near the first hole such that the center-points of the first hole and the guide hole are oriented with a predetermined and known orientation with respect to the primary flat of the wafer.

Abstract: A machine for fastening a compression ring on an object to be fastened by shrinking the ring in which segmental actuating slide members are movable within a housing along circular paths with a constant radius about a center, and in which segments on the inside of the slide members are operable to move a limited distance in the radial direction; the segmental slide members are provided with internal surface portions of non-constant radial distance from a center, and the segments are provided with surface portions for abutment with the non-concentric surface portions on the inside of the slide members; an actuating mechanism operatively connected with the slide members causes the latter to close and thereby forces the segments to reduce the inside diametric dimension thereof which in turn causes compression of a shrink-ring held thereat.

Abstract: A tool is described for inserting a compressible septum into a seat having a smaller inside diameter than the outside diameter of the uncompressed septum. The utilization of this insertion tool simplifies the insertion of the septum into the seat while avoiding contamination of the septum.

Abstract: A process for making fine metallic fibers comprising coating a plurality of metallic wires with a coating material. The plurality of metallic wires are jacketed with a tube for providing a cladding. The cladding is drawn for reducing the outer diameter thereof. The cladding is removed to provide a remainder comprising the coating material with the plurality of metallic wires contained therein. The remainder is drawn for reducing the diameter thereof and for reducing the corresponding diameter of the plurality of metallic wires contained therein. The coating material is removed for providing the plurality of fine metallic fibers.

Abstract: An improved method and apparatus for effecting separation of plastic components from associated metal components where the plastic and metal components are attached to one another by fasteners, e.g., effecting separation of plastic components from a discarded manufactured product such as an automotive vehicle. The improved method comprises impacting the heads of the fasteners in a direction leading from the plastic component to the metal component, so as to cause the plastic component to rupture around the fasteners and thereby free the plastic component from the metal component. The improved apparatus is a pneumatically-powered striker device that is designed for easy alignment of its striker with the heads of the fasteners and is capable of driving its striker against said fasteners with sufficient force and acceleration to cause rupture of the plastic component around the fasteners so as to free the plastic component from the metal component.

Abstract: A method of producing a coating layer on a localized area of a superalloy component comprises the steps of:a) producing a coating layer element with specific functional properties;b) depositing on at least one surface of the coating layer element a uniform layer obtained from a powder mixture consisting of a powder of a nickel or cobalt superalloy and a powder of a brazing filler metal;c) brazing the coated composite coating layer element obtained from step (b) on to the localized area of the component; and,d) machine finishing the component.

Abstract: Picture hangers having prongs become automatically inserted into a picture backing material. An insertion apparatus feeds a strip of preformed blanks to an anvil which severs the blanks and presses them into the backing material. At the same time that the apparatus severs the first blank of the strip, a prong forming tool, attached to the anvil, bends the prongs of the next blank. A feed rod advances the strip of blanks through the apparatus, one blank at a time. A pair of paws, attached to the anvil, carry the severed hanger to the picture backing, and releases the hanger as the hanger becomes inserted into the backing. The apparatus includes a resilient structure which enables the device to operate efficiently with picture backings having varying thicknesses. One can also use the invention to insert hangers into picture frames, mirrors, plaques, signs, or the like.

Abstract: A multipole brushless DC motor stator is formed with a pair of complementary opposable claw pole stator structures in which each of the stator structures comprises a stator base formed of a plurality of stacked sheet metal laminations. A plurality of stator pole members extend from the stator base and are formed by compression molding of a ferromagnetic material. In one form, the ferromagnetic material is molded in situ on the stator base by positioning the stator base in a compression mold having the slots in which a powdered or flaked ferromagnetic material can be positioned and compressed by a die. In another form, the ferromagnetic pole members may be independently compression molded of powdered or flaked ferromagnetic material and then adhesively bonded to the stacked laminations forming the stator base. In either method, the stacked laminations are formed with a plurality of receptacles for receiving one end of each of the stator poles and holding the stator poles to the stator base.

Abstract: Method of manufacturing a multilayer thin film magnetic head having reproducibly narrow gap widths, by:providing a stepped non-magnetic basic layer;providing a stepped magnetically permeable layer on the stepped basic layer;providing a stepped non-magnetic layer on the magnetically permeable layer;planarizing the structure to a level to expose the stepped part of the first magnetically permeable layer in the planarized surface, so that the thickness of the first magnetically permeable layer determines the width of the transducing gap of the magnetic head which is being formed.

Abstract: A long service life abutment member for use in an electronic component placement apparatus, such as a suction bit and an abutment body of a clamping finger. A diamond film or sintered diamond body is formed on top of the suction surface of the body of the suction bit for placing an electronic component at an intended place on a printed circuit board and on top of abutment bodies of clamping fingers for clamping the electronic component therebetween.

Abstract: An apparatus for positioning an electric wire within a terminal application system for installing an electric terminal on an electric wire, includes at least one claw, having an axis of rotation and a longitudinal axis extending generally transversely from the axis of rotation, and connected to the shank holder through the axis of rotation so that the claw is free to rotate about the axis of rotation with respect to the shank holder while connected to the shank holder, and being rotatable from a wire positioning condition to an open condition. A support member connected to the shank, supporting the claw and allowing the claw to move from the open condition to a wire positioning condition when the shank and moveable mold are moved toward the stationary mold is also included. Biasing members, such as springs, may also be included.

Abstract: A method and apparatus for attaching a set of components to a printed circuit board is presented. A second board includes the set of components to be attached to the printed circuit board. The second board attaches directly to the printed circuit board by attaching to pins of a through hole device, such as an application specific integrated circuit. The through hole device is mounted on one side of the printed circuit board. The through hole device comprises pins which protrude to the other side of the printed circuit board. The second board attaches to the protruding pins on the other side of the printed circuit board.

Abstract: A control and panel assembly using a thin dielectric carrier strip upon which a sheet of conductive material is adhesively attached. The conductive sheet is perforated to form an array of spaced parallel discrete conductors. The conductors are initially formed as interconnected by transverse webs which are frangibly removed after attachment to the carrier. Individual stand up connectors are then attached to each of the conductors to form a carrier sub-assembly and the terminals are inserted through slots in a dielectric deck plate. Individual user actuated control components are then plugged directly into the terminals with user actuated shafts or levers extending through deck plate and carrier strip.

Abstract: An apparatus for mounting electrically conductive balls includes a mounting head which has an attracting tool with a number of attracting holes in its lower surface and attracts electrically conductive balls through a vacuum. The attracting tool is resiliently supported by the mounting head through springs. A flux is stored in a container at a predetermined depth. The electrically conductive balls attracted to the attracting tool project from its lower surface by a length larger than the depth of the flux. When the attracting tool is lowered, the electrically conductive balls contact a bottom surface of the container in a resilient manner due to spring tension of the springs. Then, by raising the attracting tool, the flux adheres to lower surfaces of the electrically conductive balls. With the flux kept at a proper depth, it can be made adhere in appropriate amount to all the electrically conductive balls at one time.

Abstract: In aspect, the present invention is directed to a method of modifying a circuit board having at least one Ball Grid Array (BGA). The method includes removing the via portion of the BGA pad from the circuit board to sever the connection between the via and the circuit, attaching the pad connector to the circuit board, and connecting the pad connector to the circuit of the circuit board.

Abstract: A method for forming a hollow structure having a predetermined shape from a sheet of superplastic material. The sheet is initially formed into a preform configuration. A reusable fluid inlet tube is placed in the preform configuration to define a port in fluid communication with the interior portion of the preform configuration. The preform configuration is disposed in a containment die, which defines a cavity having the predetermined desired shape. Force is applied to the containment die to temporarily seal the edges of the preform configuration without the use of welding or diffusion bonding. Once its edges are sealed, the preform configuration becomes a gas-tight envelope capable of holding fluid that is introduced through the fluid inlet tube. Fluid (e.g.

Abstract: The invention relates to a ball valve (3) with full opening between two tubes (1, 2) and the manufacturing method thereof. The ends (6, 7) of the tubes are sealed in the valve against the valve ball (5) opening and closing the valve and rotating about its axle (17), the diameters of the flow openings (9, 10) of the valve ball being substantially the same as the diameters of the flow cross sections of the tubes. Around the valve ball and the ends of the tubes there is a sleeve-like casing (8) secured by its ends (15) to the sides of the tubes (1, 2). According to the invention, a protrusion is formed in the ends of both tubes (1, 2), comprising an annular sealing (11), and the casing (8) is formed with a tapered reduction towards its ends so that the valve ball (5) and the ends of the tubes are located in the space (16) defined by the casing (8) of the valve.

Abstract: There are provided a connection structure and process for connecting a eye-joint and a slender metal pipe, which is enabled by making the welding operation completely unnecessary to eliminate the working troubles and a fear of cracking or breakage, as might otherwise be caused by deteriorations in the mechanical properties in the vicinity of the connection end portion, which can use the eye-joint body and the metal pipe, as plated with a corrosion-resistance substance or coated with a resin in advance, to improve the productivity drastically thereby to ensure the connection with neither axial nor circumferential movement, and which can connect a metal pipe, if necessary, as having a diameter larger than the width of the eye-joint body.

Abstract: A method for making a heat exchanger tube having an elongated, generally rectangular member including a planar base, a top, and pair of arcuate opposed side portions interposed between the base and the top. A partition extends from the top to the base to define a pair of fluid passageways, the partition including a pair of opposing, contacting shoulder portions and a leg portion depending from each of the shoulder portions which contact the base. A first braze receiving of predetermined size is defined between the shoulder portions and the manifold of the heat exchanger. The size of the braze receiving area is controlled by minimizing the curvature of the shoulder portions.

Abstract: A method of making an enclosed, hollow insulating spacer for spacing apart panes of a multiple pane unit. The method includes steps of forming metal into first and second leg members for a spacer, preheating the first and second leg members of the spacer near the melting point of one of a synthetic resin material and a composite synthetic resin material, feeding the preheated first and second leg members of the spacer into a crosshead extruder together with one of the resin materials to embed by crosshead extrusion only a portion of each of the first and second leg members into the material, to affix the embedded portion of each of the leg members to the material and to form from the material a first bridge member that extends between the leg members and spans across one end of each of the leg members, and providing a second bridge member that connects the opposite ends of the leg members.

Abstract: An improved carton cutter has an incrementally extendable fully retractable first cutting blade with a depressible safety guard at its front end. A strap cutting second blade is fixed at a hooked rear end of the cutter. A ratchet mechanism provides audible evidence of the amount of blade extension and a pointer shows the position of the front blade. The front blade is mounted on a lockable slide. Both blades are easily removable without disassembly and precisely positioned without noticeable play.

Abstract: A cutting device embodying a housing that fully encloses the knife blade in its retracted position. The cutting device has access slots in the sides of the housing that provide access to the interior of the housing without having to disassemble the housing. The cutting device can be operated manually through the access slots, or pneumatically by attaching a nose mount air cylinder to a threaded hole in the housing. An air source can be attached to an end of the housing opposite the threaded hole, for automatically removing scrap from the cutter.

Abstract: A cutting machine having a rotatingly driven cutting tool (2) and a tool guard (1). The tool guard (1) has a first tool guard part (11) which is fixedly mounted with respect to the apparatus and a second tool guard part (12) which can be pivotably mounted relative to the first tool guard part (11). Each tool guard part includes side walls (30, 32) lying adjacent to respective sides of the cutting tool and a center web which connects the two side walls to each other. The center web (31) extends curved in the peripheral direction and is disposed above the cutting tool (2). In order to perform a disturbance-free pendular cut, the pivotable second tool guard part (12) carries a slide piece (40) which projects beyond the end edge (34) of the center web (31) and has a rounded outer slide surface (35) facing away from the center web (31). The end edge (34) faces away from the fixed first tool guard part (11).

Abstract: A cutting tool is constructed from a rigid, U-shaped frame member which supports a pivotable blade holder assembly. The blade holder assembly is operative for clamping a replaceable utility blade to the frame member by means of an easily engageable bolt. A retractable safety cover prevents accidental injury from contact with the cutting blade, while a removable sleeve defines a storage area in conjunction with the frame member for storing one or more replaceable cutting blades.

Abstract: A locking safety utility knife includes a body and an operating lever that is squeezed to deploy a retractable cutting blade from within the body. The blade can be locked in its retracted position by means of a ratchet-like mechanism including a pawl which is released by manipulating a cam operator. The pawl engages teeth formed on the outside of a door which closes the rear of a compartment formed in the operating handle to house spare blades, or a blade cartridge.

Abstract: The present invention is a compound action complex pivotal multi-planar cutting device. It is pivotal between four distinct pivot points and it includes a handle portion and a jaw portion which are attached to one another. The jaw portion may be curved or may be bent and terminates in a pair of opposed cutting blades. Thus, when a user holds the handle portion, the blades are displaced a pre-determined number of degrees with respect to the relative curvature or bending of the jaw portion. The handle portion and jaw portion are engaged to one another and are pivotal about two pivot points. The handle portion is preferably a pair of handles that are joined at a third pivot point by a first post member and the jaw portion is preferably a pair of jaw members joined at a fourth pivot point by another post member which is oblique with respect to the first post member.

Abstract: A cartridge-connecting subassembly for a shaving razor handle including a cartridge connecting structure, a handle connecting structure, and a movable component within the cartridge connecting structure that interacts with a replaceable cartridge when it is connected. The cartridge connecting structure and handle connecting structure have outer side surfaces that mate with inwardly directed surfaces of the cartridge and handle so that the subassembly is substantially covered when it is mounted in the handle and a cartridge is connected. The subassembly has an assembly opening for receiving the movable component during assembly, a cartridge interaction opening through which the component is movable for interaction with the cartridge, and blocking structure that retains the movable component in the subassembly. The movable component is an ejector structure that is separate from the cartridge connecting structure. The subassembly is connected to the handle by staking.

Abstract: A small expendable device for accurately and very quickly adjusting the verticality of door jambs without shingles or other shims. The device includes a body member which is attached to the rough wall opening and a carriage member which is attached to the door jamb and which is slideable in tracks across the body member. A Phillips screwdriver is placed in a tapered hole in the body between the tracks and its blades mate with a toothed edge of the carriage so that rotation of the screwdriver will force out or draw in the carriage. When locked, the door casing is applied over the door set device.

Abstract: An apparatus for longitudinally centering the front and rear pairs of vehicle wheels includes a frame having pairs of laterally movable tables, each for receiving one of the vehicle wheels. Pusher members are engageable with each vehicle wheel. A centering mechanism is connected to the pusher members and normally biases the pusher members laterally outward such that laterally inward movement of one of the pusher members due to engagement with an off center vehicle will be resisted by the centering apparatus which will in turn urge the pusher members laterally outward moving the vehicle wheels and the tables laterally outward to a longitudinally centered position. Preferably separate pairs of tables, pusher members and a centering mechanism are provided for each of the front and rear pairs of vehicle wheels.

Abstract: A visual display with an alignment structure for visually determining a correct display angle and lateral displacement, top to bottom and left to right, for accurate color viewing. A first fixed pattern is located on a surface near a border of the display and a spacer supports a plate, elevated above the first pattern, having a second pattern around a throughole in the plate. The dimensions of the first and second patterns, the elevation of the second, and the throughole diameter are such that when viewed at the intended display angle the image of the first pattern is concentric with the image of second pattern. Alternatively, the spacer may be formed of a transparent member with the second pattern on a planar surface above and parallel to the first fixed pattern. A first and a second alignment structure may be located symmetrically about either side of the display to enable determination of lateral alignment as well as angle of the display.

Abstract: The invention is directed to a coordinate measuring apparatus wherein the influences of temperature on the measuring uncertainty of the apparatus are eliminated. Components of the two pivot arms, which determine the spacing A of the rotational axes (6, 8) and the spacing of the rotational axis 8 to the probe axis 10, are made of materials having positive and negative thermal expansion coefficients.

Abstract: A web thread-up apparatus for a beltless double backer includes a coiled flexible band positioned at the downstream end of the double backer on a reel from which the band may be unwound in the upstream direction through the double backer heating section. A clamping device on the free end of the band is utilized to capture the downstream edge of a new corrugated web positioned at the upstream entry to the double backer. Rotation of the reel is reversed to rewind the flexible band into the coil, carrying the web with it through the heating section of the double backer. A downstream web drive conveyor receives the lead edge of the new web which is detached from the rewound clamping device.

Abstract: A disposable protective shoecover for use by health care workers is formed by two pieces of fluid resistant, fluid proof, impermeable material sealed along the outer edges except at the back. The back of the shoecover is closed by two double coated adhesive closures spaced at two intervals along the back. The upper most closure is spaced two inches from the top of the shoecover. The closures can be easily released by inserting a finger in a top of the back of the shoecover and then removing the shoecover, whereby the finger only touches an interior of the shoe cover upon removal. This protects the wearer from touching any exterior portion of the shoecover which may be contaminated.

Abstract: A pilot pressure sensor detects a pilot pressure from an arm operating unit and outputs a pilot pressure signal. A drive signal corresponding to the pilot pressure signal is then outputted from a controller to a solenoid-operated proportional valve. Through the solenoid-operated proportional valve, a pilot pressure is fed to an auxiliary selector valve so that an opening of said auxiliary selector valve becomes greater. Of pressure oil delivered from a first hydraulic pump, a flow rate of the pressure oil to be branched to a side of a by-pass circuit is hence increased. The pressure oil fed through the by-pass circuit passes through a merging directional control valve and is caused to merge with pressure oil fed from a second hydraulic pump. The thus-merged pressure oil is then fed to a hydraulic arm cylinder.

Abstract: A level boom is provided for a piece of strip mining equipment traveling on caterpillar-type chassis, which piece of equipment is temporarily moved on oblique roadways during operation. The position of the boom in relation to the skeletal structure is corrected with simple means. A piece of strip mining equipment with a boom, which can be lifted and lowered and at the free end of which, e.g., a bucket wheel for picking up a load is arranged, is connected to the substructure of the piece of equipment in a pivot axis. The lifting movement is brought about by a lifting cylinder. A tilting support, which carries the boom, is arranged in the pivot axis for lifting and lowering the boom. A bolt connection is provided on one side in the pivot axis for leveling between the tilting support and the boom, and the actuating element for leveling as well as a step bearing for absorbing lateral forces which the actuating element is unable to absorb, are located on the other side.