Abstract: A pneumatic ram boring machine (12) has an air-permeable hollow cylinder (2) with a sound absorbing and/or oil separating packing (9, 11) arranged in the exhaust air stream of the machine.

Abstract: A fastener conveying apparatus for a fastener assembling machine comprises a chute defining a first passageway for guiding a plurality of fastener members in succession, a guide defining a second passageway joined at one end to a lower end of the first passageway for guiding the fastener members one at a time through the second passageway. A front part of the guide is detachable to open the second passageway along its entire length so that a fastener member jammed in the second passageway can be removed easily by using both hands.

Abstract: Apparatus for manipulating a tool which is particularly suited for use in drilling and inserting bolts into thin seams of mine workings. The apparatus (100) comprises a reaction support member (4) to support the tool, a chuck (1) for holding the tool, mounting member (12) in which the chuck (1) is mounted, and a lever linkage (13) connected between the mounting member (12) and the support member (4). The lever linkage (13) comprises parallel chuck orienting members (5, 10) connecting the mounting member to a control member (9), said control member being adapted to manipulate the chuck orienting members and to control the orientation of the chuck. The lever linkage further comprises first and second links (14, 15) each having first and second ends. The links are pivotally attached to each other at the first ends thereof. The first link is pivotally attached at the second end thereof to the mounting member and the second link is pivotally attached at the second end thereof to the support member.

Abstract: An electrically powered screw tightening tool including a motor (11) which via a torque transmitting mechanism (12) is coupled to an output shaft (13) for applying torque to a screw joint. The torque transmitting mechanism (12) comprises a torque responsive clutch (16) and a trip device (19) by which an axially extending release rod (23) is supported during operation of the tool. A switch (14) is provided to supply electric power to the motor (11), and a control mechanism including an operator activated manoeuver device (37) and an activating device (28) associated with the release rod (23) is arranged to cause shifting of the switch (14) between an OFF-condition and an ON-condition. The activating device (28) is actuated both by the manoeuver device (37) and the release rod (23).

Abstract: Rock breaking apparatus includes a guide column within which a weight falls under gravity to strike a tool. A piece of shock-absorbing material is located at or near the base of said column such that it enables force to be transmitted from said weight to the tool, while minimizing the effect of the impact of said weight on other parts of the apparatus. The piece of shock-absorbing material has an aperture therethrough, for the passage of the tool. The tool may have a recessed portion which co-operates with a retaining pin located substantially at right angles to the direction of motion of the tool. The apparatus may also have an operating device, including a device for raising a weight, a device for holding a weight in one of a number of positions and a device for allowing said weight to fall.

Abstract: A base for use with a tacker. The base includes a plate fixed on a first cavity at the front side thereof with a rivet. A groove is disposed in the plate. A bending plate is attached to the rear end of a resilient plate such that the staple remover of a tacker can be set within the bending plate, thus forming an assembly which can be utilized to staple a thick stack of paper.

Abstract: A hand held nailing device for use in starting, driving, and setting nails is composed of a hollow cylindrical barrel having a stepped diameter longitudinal bore. An abutment shoulder is formed by the intersection of first and second diameter portions of the longitudinal bore. A stepped diameter cylindrical ram is slidably received within the barrel. An annular stop face is formed by the intersection of a first smaller diameter portion and a second layer diameter portion of the cylindrical ram. A spring ball detent is utilized to retain a nail in the barrel by engaging the nail head. By striking the end of the ram, the nail will be driven into the desired location on a work surface until the stop face on the ram contacts the abutment shoulder within the barrel. By appropriately dimensioning the barrel and the ram, the device may be adapted for use with a variety of different sized nails.

Abstract: A well casing of an elastic metal material is placed in concentric relationship with a casing of an inert material such as a suitable plastic. A penetrating cap piece is placed on the bottom end of the metallic casing. The two concentric casings are then driven into the earth in an area to be monitored for contamination, such driving action being achieved by a sonic oscillator which is attached to the top end of the metallic casing. Preferably, the sonic energy is provided at a frequency such as to effect resonant standing wave vibration of the metallic casing. Further, water may be injected down the casing so as to lubricate the earthen structure immediately below the cap to accelerate the penetration of the casing. When the casings have been driven to the desired depth, the metallic casing is withdrawn by lifting up thereon while continuing to apply sonic energy, leaving the casing of inert material in place such that earth samples can be periodically withdrawn from the well thus formed.

Abstract: A two-speed power tool having a rotation motor supported in a housing (10) and driving an output spindle via three planetary reduction gears (13, 25, 22). The ring gear (17) of a first planetary gear (13) is rotatable relative to the housing (10) as well as axially displaceable between a high speed position and a low speed position. A friction coupling (37) is associated with the housing (10) and the ring gear (17) of the first planetary gear (13) to lock the latter against rotation either relative to the planet wheel carrier (16) of the first planetary gear (13) when occupying its high speed position or relative to the housing (10) when occupying its low speed position.

Abstract: The power drive system of the present invention provides a rotary drive swivel unit which can be tilted along its horizontal pivotal axis until its output shaft is substantially horizontal. A drill pipe provided in a substantially horizontal bed adjacent to the drilling rig is aligned with the output shaft of the rotary drive swivel unit and this joint is made up. The rotary drive swivel unit is raised and the suspended drill pipe reoriented to a vertical position and is aligned over the drill string and added thereto substantially at platform level. The power drive system turns the drill string and advances the drilling downhole. The rotary drive swivel unit disengages from the drill string and the foregoing steps are repeated.

Abstract: An automatic nailing apparatus includes a housing having a piston driving system for driving a piston, a percussion rod having a concave at only the tip thereof, a nosepiece having a round channel being provided with a pair of nail head guide rails, and a nail magazine for supplying interconnected nails. The forefront nail of the interconnected nails can be nailed in a direction normal to a workpiece because a point of application on nailing exists on the center axis of the forefront nail.

Abstract: A hand-held device with a holder for a working tool has a sensing mechanism for automatically initiating different operating modes. Different configurations of working tools inserted into the holder can be sensed by sensing elements in the form of balls. The balls cooperate with pivotal levers and a sensor for producing switching signals for initiating a switching operation.

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 stapling system with a power driven stapler unit for stapling sheets together by clamping the sheets together with a clamper and driving a staple into the sheets with a staple driver while the sheets are clamped, and clinching the legs of the staple with a clincher, sequentially in that order; a single flexible cable with internal bights thereof operatively connecting with the clamper, the staple driver and the clincher, and with a free portion of the cable extending from the stapler unit and pulled with increasing movement and tension to provide the sole actuating power for the stapler unit wherein sequentially coupling pulleys engaged by the internal bights of the single flexible cable, and movement stops and/or resistance springs of different resistance forces, respectively operatively associated with the clamper, the staple driver and the clincher actuate them in that order, and wherein paired pulleys are arranged to multiply the forces available for the stapling from the cable tension.

Abstract: A fastener conveying apparatus, for a fastener assembling machine, comprises a chute defining a first passageway for guiding therethrough fastener members in succession, a guide pivotally mounted on a fixed guide holder and defining a second passageway for guiding therethrough one fastener member at a time as it is pushed by a pusher. The guide is pivotally movable downwardly away from the chute.

Abstract: This invention relates to a method and apparatus for collecting subsamples of soils to be tested for infestation and nutrient content. The apparatus includes a sampling tube which is mounted on a collecting wheel which is mounted on a frame. During operation, the apparatus is lifted off the ground. To take a sample, the apparatus is lowered such that the wheel makes contact with the ground. This causes the wheel to rotate, forcing the sampling probe into the ground. The sample empties into the interior of the wheel where it mixes. The mixed sample is later removed and boxed for testing.

Abstract: A vacuum-compression type percussion power tool comprising a housing (12), a cylinder (14) fixed in the housing, a piston (16) reciprocating in the cylinder (14) from a reciprocating drive mechanism such as a crank mechanism (18) driven by an electric motor, or any other suitable drive, a working tool (24) installed in the front part of the power tool, and a floating striker (34) which slides inside the cylinder (14) in a space between a tail portion (26) of the working tool (24) and the lower end of the piston.

Abstract: An electric handtool includes a two-stage speed reduction gear unit in which each stage includes a sun gear and two planet gears carried by a carrier. The carrier of the first stage has a small diameter hexagonal first socket for receiving and entraining, for example, the shank of a chuck. The carrier of the second stage has a large diameter hexagonal second socket for receiving and entraining, for example, the shank of a screwdriver bit as well as a passage bore to provide access to the first socket. The socket and bore in the second stage are dimensioned so that the shank of the chuck can extend therethrough without being entrained thereby.

Abstract: Hydraulic hammers are useful for transmitting high impact blows to a tool for fracturing hard material. When two hammers are used in combination the impact blows delivered to a common tool by the hammers should be synchronized for maximum effectiveness. The subject synchronized hydraulic hammer arrangement includes a valve arrangement for alternately directing pressurized fluid to a variable volume chamber in each of a pair of hydraulic hammers to simultaneously retract a piston of each hydraulic hammer against the bias of pressurized gas in a gas chamber of each hydraulic hammer and exhausting the variable volume hydraulic chambers in response to at least one of the pistons reaching a predetermined position. The gas chambers are interconnected for equalizing the gas pressure therein. This arrangement of components provides synchronized movement of the pistons in an outward direction so that they simultaneously impact against the common tool.

Abstract: In a drilling device, a tool mounted in the device can be selectively switched from right-hand rotation to left-hand rotation. The tool can be connected to an output shaft on which two conical gear wheels are mounted in spaced relation so that they can be rotated in opposite directions around the output shaft. The teeth on the conical gear wheels face one another and are in meshed engagement with gear teeth on a drive shaft. A coupling part is slidably displaceably mounted on the output shaft and can be engaged with one or the other of the conical gear wheels. The coupling part is secured on the output shaft so that as it is rotated by one or the other conical gear wheels, in turn, it rotates the output shaft in the desired direction.