Abstract: A dust collector includes body, a dust-storing part, a sliding part, a dust-transfer passage, and a biasing member. The sliding part is held by the body to be slidable in a specified axial direction and has a suction port. The dust-transfer passage connects the suction port and the dust-storing part. The biasing member biases the sliding part in a first direction of the axial direction. The sliding part is configured to be normally held in an initial position in which the sliding part protrudes from the body by a specified length in the first direction, and to be moved in a second direction opposite to the first direction against the biasing force when pressed in the second direction. The dust collector includes a cushioning member configured to be interposed between the body and the sliding part in the axial direction when the sliding part is placed in the initial position.

Abstract: A power tool assembly includes a hand-held power tool, a dust collector removably coupled to the power tool, and first and second power tool battery packs each of which is interchangeably coupled with the power tool and the dust collector for separately powering the power tool and the dust collector, respectively.

Abstract: An adjustable grasping handle which may be used, for example with a supersonic air knife having a compressor and a barrel and nozzle, wherein the adjustable grasping handle assembly forms a barrel handle comprising i) a pair of clasping elements, each clasping element having two gripping surfaces configured to engage the barrel at a point of engagement, with one point of engagement on each side of a first centerline of the barrel; ii) a pivot pin coupling the two clasping elements together on one side of the centerline of the barrel; and iii) A handle with a threaded element engaging the pair of clasping elements configured to draw the clasping elements together around the barrel.

Abstract: A rail has a guide surface on which the locking block is guided in a bearing manner between a position locking the bar, in which the toothed side engages in the toothed long side, and an unlocked position, in which the toothed side is not engaged with the toothed long side. A spring pretensions the locking block into the locking position. The guided side and/or the guide surface have a flank that is inclined with respect to the bar axis such that the locking block is forced in the direction of the bar in the event of a movement along the bar axis.

Abstract: An anchor setting apparatus includes an arm, a drill stop, a control actuator, a holster for carrying a drill tool, and linkage for coupling the control actuator to a speed control of the drill tool. The holster and drill stop are coupled proximate one end of the arm. The control actuator is coupled proximate another end of the arm. In various embodiments the length of the arm is variable.

Abstract: Example embodiments of the present disclosure are directed to measurement and control systems and methods of improved spooling accuracy. Specifically, the systems and method disclosed herein provide techniques for accurately monitoring the depth of a sandline in a wellbore through sensing spool rotation, and controlling certain aspects of the spooling and/or producing certain notifications when the depth is above or below a certain threshold. Thus, the spool can be operated with increased diligence when it gets close to the wellhead. In certain example embodiments, the depth of the sandline is measured based at least partially on the number of spool rotations, compensating for decreasing length of sandline per layer of sandline on the spool.

Abstract: A hand-held power tool device comprises an impact tool unit configured to generate a pulse on an insertion tool, and a sensor unit configured to detect at least one of at least one operating parameter, and at least one ambient parameter. The sensor unit includes at least one sensor element configured to detect a spatial position of the impact tool unit.

Abstract: A nailer incorporates an integrated stud finder for sensing when a stud is present. The nailer has a work contact element and a magazine for storing nails. The stud finder includes a sensor plate coupled to the work contact element of a nailer and a stud sensing circuit coupled to the sensor plate. The stud sensing circuit is provided for reading a capacitance level and for determining whether the sensor plate is positioned adjacent a stud based upon the capacitance level that is read. The stud finder also includes at least one signaling device coupled to the sensor plate for signaling to a user when a stud is present. The sensor plate is coupled to a no mar tip that is tethered to the nailer. A storage post for storing the no mar tip is positioned on the magazine for storing the no mar tip when not in use.

Abstract: An electrically powered hand tool is disclosed. The tool includes a motor, a power source, a work element and a controller. Various alternative features, embodiments and operative configurations are disclosed.

Abstract: A hand-held tool having a motor, a vibration mechanism, and a stake-gripping device is disclosed for driving and extracting stakes or posts. The vibration mechanism generally comprises a housing surrounding a pair of geared eccentric plates or geared weighted plates that are rotated by the motor. The stake-gripping device is attached to the vibration mechanism so that vibrations are transferred into a stake or post through the device housing. Internally, the stake-gripping device comprises a pair of toothed plates with at least one of the plates mounted to the housing utilizing springs. The spring mounted plate has an attached wire connected to a handle. As the handle is grasped, the wire pulls the stake-gripping device into the open position allowing placement of a stake or post into the device. When the handle is released, the toothed plate squeezes the stake or post inside the housing.

Abstract: An improved structure of a two dimensional positioning nailing machine is disclosed, which has a body, a positioning member and at least one positioning rule, the improved structure characterized in that the positioning member is removably attached on the body, the positioning member in an approximately reversed U shape having a first side portion, a second side portion and a head end; wherein the first side portion has an inner side and an outer side, and the second side portion has an inner side and an outer side, the outer side of the first side portion, the outer side of the second side portion and the head end having at least one positioning slot, the positioning rule capable of being inserted in the positioning slot to adjust a stroke to position distance.

Abstract: A rock drilling device has a feed beam (1) and a rock drilling machine (2) movable along the feed beam. The rock drilling machine is fed along the feed beam (1) by a feed line (7), which is routed over a sheave (6) arranged at the movable end (5) of a pressure medium cylinder (3). A further line (8) is arranged between two points (9, 10) which are fixed relative to the movable end of the pressure medium cylinder. The further line (8) is connected to a measuring device (11) which is fixed to the feed beam (1) for measuring displacement of the rock drilling machine (2) along the feed beam.

Abstract: A real-time fastener measurement system includes an anvil (10) having a striking surface (16) that engages a fastener as it is upset. Three proximity sensors (20) are disposed at 120.degree. intervals around a striking surface of the anvil. A computer system (110) reads the electronic signals produced by the proximity sensors just after the fastener has been upset and converts the signals to digital values. The computer stores a piecewise linear function that has been predetermined for each sensor and uses the function to convert the digital values of the proximity sensor to fastener head height.

Abstract: A grade stake driver includes a frame for supporting a hammer and a grade stake under the hammer. A shuttle secured to the hammer movably mounts onto the frame to connect the hammer to the frame. A hoist secured to the shuttle mounts onto the frame to permit the raising and lowering of the hammer. A receiver mounted on the frame outputs a control signal in response to a transmitted signal. A switch mounted on the frame transforms the control signal into an on/off signal. A relay mounted on the frame connects the hammer to a power source in response to the on/off signal, thereby effecting the driving of the grade stake.

Abstract: An arrangement for measuring the position of a feed beam (1) in a rock drilling apparatus relative to a cradle (4) therein, or measuring the position of a rock drill (3) relative to the feed beam (1). In the arrangement an inelastic, flexible cogged belt (6; 13) is fixed to the feed beam (1) to the surface thereof, the cogged belt (6; 13) being installed to turn about the gear (9; 15) of a resolver mounted in a cradle (4) or movably with the rock drill (3), so that when the feed beam (1) moves relative to the cradle or when the rock drill (3) moves relative to the feed beam (1), the cogged belt (6; 13) rotates the gear (9; 15) of the resolver, and the resolver measures the position of the feed beam (1) or the rock drill (3) respectively.

Abstract: A handheld electromotive tool capable of efficient execution of a floor board and a ceiling board is provided. The tool is used in combination with a beam emitting device for emitting a radiation beam in a reference plane, and is provided with a housing held by an operator. The housing has a work member driven by an electric motor and a photo detector for receiving the radiation beam projected in the reference plane. Output signals indicating positional deviation of the photo detector from the reference plane are generated on the basis of output of the photo detector. Rotation of the motor is controlled as follows. Rotation of the electric motor is stopped when the radiation beam is received at a reference position of the photo detector. The electric motor rotates at high speed until the radiation beam is received in the vicinity of the reference position.

Abstract: System for measuring the penetration depth of an elongated object such as a pile, tube, sheet pile or drill into the ground, to be used in combination with an installation for bringing the elongated object into the ground for instance by pressing, hammering, vibrating, drilling or lowering, or for pulling or otherwise removing the elongated object out of the ground. The system comprises a member for measuring the displacement of the elongated object embodied as a flexible elongated element the weight of which is uniformly distributed along its length, the length being at least equal to the maximum displacement of the elongated object. At least part of the elongated element is supported by a supporting surface. Structure is present to determine the total weight of that section of the flexible elongated element which is supported by the supporting surface.

Abstract: An automatic drive hammer system includes an automatic drive hammer apparatus which is carried by a bucket pivotally mounted to a drill rig. The drive hammer apparatus may be pivoted in the bucket from an off-hole storage position to an on-hole loading/unloading position whereby the drive hammer apparatus is lifted out of the bucket by a winch assembly and the bucket is pivoted to the off-hole storage position. An anvil and connector connects to a drill string and sampler which extend upwardly from a hole in the ground. The drive hammer apparatus has a housing which contains a hammer adapted for reciprocal sliding movement therewithin to cyclically strike the anvil to drive the anvil, drill string and sampler combination into the ground. A trip rail is rigidly attached to the anvil and extends within the housing. A follower assembly is pivotally mounted to the hammer.

Abstract: A top head drive cooling system is provided for an earth drilling machine of the type having a mast, a top head drive assembly mounted for movement along the mast, a quill included in the top head drive assembly, and an electric motor for rotating the quill. This cooling system includes an air duct mounted to the mast and defining a slot extending along the mast. The slot is sealed by a pair of flexible resilient lips which bridge the slot, and a blower is situated at ground level to blow cooling air into the air duct. A conduit is provided on the top head drive assembly, and the conduit extends between the lips into the air duct and conducts air from the air duct to the electric motor. The portion of the conduit which extends into the air duct is preferably tapered at both ends in order to provide a sliding seal against the lips. A position measuring system is coupled to the conduit and is positioned within the air duct.

Abstract: In a hydraulic pile driver (10), the lifting cylinder (34) acting on the driving weight (12) has an attached position indicator (46, 50), which produces a signal corresponding to the momentary position of the piston rod (32) of the lifting cylinder (34). This signal is used for reversing a 4/3-valve, by which the two working chambers of the lifting cylinder can be connected to a pressure line or return line.

Abstract: In percussion drilling such as earth drilling, a hammer piston driven by pressure medium is axially reciprocally movable in a drill body to transfer impact energy to a drill shank connectable to a drill bit. The axial position of the drill shank in the drill body is monitored, and the impact energy of the hammer piston is varied as a function of said position. For this purpose a sensor in the drill body produces a signal corresponding to the axial position of the drill shank in the drill body. By means of a control valve, the signal is used to control the pressure of the pressure medium actuating the hammer piston, thereby varying the impact energy.

Abstract: A digital depth indicator for rotary earth drills, and particularly auger type drills, operates from the means used to lower and raise the drill. The indicator operates from either the wire or cable of a wire line hoist auger or the hydraulic fluid flow in a hydraulic Kelly hoist type machine. A rotary measuring device is provided with an incremental shaft encoder which rotates to produce a dual signal which is supplied to (1) an up/down digital counter and (2) a programmable .div.N counter, which counter supplies a .div.N pulse to the up/down digital counter. The programmable .div.N counter is provided with switches for (1) setting the apparatus to read in feet or in meters and (2) setting the program for the drilling machine type or model. The output from the up/down digital counter is fed through a display driver to a digital display showing the indicated depth in feet or meters.

Abstract: At least two types of reflective or emissive materials are applied in alternating manner to a pile or other object to be moved. Ultraviolet energy is emitted toward the materials and reflections or emissions therefrom are received by appropriate detector elements which convert the different respective reflected or emitted energy spectra into corresponding electrical signals for use by a processor device to determine the distance and rate which the pile or object is being moved. The calculated information is channeled to a suitable display and a permanent recording device.

Abstract: A device for accurately measuring the position of a traveling block in a drilling rig or the like which is supported by means of a cable wrapped around a drum winch assembly. A pneumatic sensor coupled to the drum provides a predetermined number of output pulses per revolution of the drum. During the paying out of a first layer of cable from the drum, the sensor pulses are coupled to a first pneumatic counter, which is preset so as to provide an output pulse corresponding to a predetermined increment of motion during the paying out of the first layer. Additional counters are provided with different preset limits so that they will provide output pulses corresponding to the predetermined increment of motion during the paying out of second and additional layers of cable from the drum. As the cable is paid out or wound in, the output of the drum motion sensor is coupled to the appropriate pneumatic counter by means of a switching assembly.

Abstract: A depth stop for a drilling tool comprises a rod 12 mounted on the tool body for sliding movement in directions parallel to the drilling movement, and a locking lever 15 pivotally mounted about a pivot boss 16 which projects at a substantially right angle to but is offset from the rod. The rod, extends through an aperture in the upper part 18 of the lever which aperture provides a radical clearance for the rod, and a spring 19 biases the lever so as to bring a peripheral edge or opposite peripheral edges of an aperture through the lever into frictional engagement with the rod and the biasing direction is the same as the direction in which the rod tends to move when it comes into abutment with a workpiece. The rod can be released by manually swivelling the lever against the spring force. The rod 12 may have a knurled surface 14 so as to provide substantially a mechanical lock with the co-operating peripheral edge of the lever aperture.

Abstract: A hydraulically operated earth boring machine, improved with a flowmeter and indicator to show the instantaneous and the greatest depth of the drilling tool.

Abstract: In a drilling machine, a rod-like stop member is mounted on the machine housing for limiting the extent to which a tool held in the machine can drill into a receiving surface. A handle lever, fitted on the housing, releasably locks the stop member in the desired position. The handle lever is pivotally mounted on the housing and has a specially shaped end surface which, in cooperation with a pressure plate, affords the locking engagement with the stop member. The locking engagement is provided by corrugated surfaces on the pressure plate and the stop member. The specially shaped end surface assures that the locked engagement cannot be released until a form-locking engagement between the pressure plate and stop member is overcome.

Abstract: A dust-intercepting member is so mounted on a hand-held power tool as to contact a structure being acted upon around the tool element of the power tool, by a mounting arrangement which includes two hollow elongated mounting members one of which is received within the other for telescoping relative thereto while being retained against rotation with respect to the other mounting member about the common axis of the mounting members, and a helical compression spring the ends of which are respectively received in the interiors of the mounting members and urge the latter in opposite directions. The other mounting member is attached to an auxiliary hand grip which, in turn, is mounted on a cylindrical extension of the housing by a quick-release clamping arrangement. A setting ring on the inner one of the mounting members determines the depth of penetration of the tool element into the structure. A depth-determining profiled rod is displaceably and arrestably mounted on the auxiliary hand grip.

Abstract: A tool breakage detecting apparatus is provided with a preset counter to be preset with a predetermined value. The content of the counter is subtracted one by one each time either one of a tool and a workpiece to be machined is moved a unit distance toward the other thereof from a cutting movement start position being spaced a predetermined distance from the other thereof. If the content of the counter is reduced an amount corresponding to a distance larger than the predetermined distance, tool breakage is detected.

Abstract: A dust-intercepting member is so mounted on a hand-held power tool as to contact a structure being acted upon around the tool element of the power tool, by a mounting arrangement which includes two hollow elongated mounting members one of which is received within the other for telescoping relative thereto while being retained against rotation with respect to the other mounting member about the common axis of the mounting members, and a helical compression spring the ends of which are respectively received in the interiors of the mounting members and urge the latter in opposite directions. The other mounting member is attached to an auxiliary hand grip which, in turn, is mounted on a cylindrical extension of the housing by a quick-release clamping arrangement. A setting ring on the inner one of the mounting members determines the depth of penetration of the tool element into the structure. A depth-determining profiled rod is displaceably and arrestably mounted on the auxiliary hand grip.

Abstract: In a well drilling system, a drill bit is raised or lowered through formations surrounding a borehole in response to the movement of a cable onto and off of a drawworks drum. Magnetic markings are affixed to the drum, and a pair of sensors detect rotational movement of the magnetic markings as the drum rotates to take in or pay out the cable. These sensors provide signals indicating both the direction and magnitude of drum rotation. These signals are digitized and selectively gated to operate a bidirectional counter whose count output is recorded as a function of time to provide a depth recording indicating penetration of the drill bit through the formations surrounding the borehole.

Abstract: A pile driving system for driving piles into an underwater surface which comprises an elongated two-part housing having a casing disposed within the lower portion of the housing and movable with respect to the housing. The casing has a pile driving hammer assembly disposed within the casing and the casing is independently suspended within the lower portion of the housing whereby the hammer assembly may be engaged with the pile and impart a series of blows to the pile, while the housing remains substantially stationary with respect to the underwater surface.

Abstract: A hand-held groove cutter, particularly for cutting grooves in concrete structures, comprises a movable carriage having wheels for rolling over the concrete structure, and a fluid-operated percussion hammer mounted on the carrier. The hammer includes a piston and a cylinder which is mounted for sliding movement in a housing, and a tool which is connected to the piston. An adjustment arrangement is operative for moving the cylinder relative to the housing to thereby adjust the stroke of the piston and the depth of stroke of the tool.

Abstract: A working implement such as a rock drilling apparatus is automatically positioned to predetermined positions and/or directions. Particularly, a drill bit is moved to an imaginary plane spaced from the surface to be worked upon completion of a drill hole by programming the predetermined positions such that they are in said imaginary plane. The actual values of the position and/or direction of the working implement may be adjusted simultaneously toward set values corresponding to the predetermined position and/or direction.