Abstract: A power tool includes a housing, a motor, a ball sleeve, an oscillating member with a mounting portion, and an output shaft rotating around an output shaft axis. The oscillating member and the ball sleeve are engaged in an engagement region on the oscillating member, and the geometric center of the engagement region is an engagement center. A first plane bisects the first bearing assembly along a direction of the output shaft axis, and a second plane bisects the second bearing assembly along the direction of the output shaft axis. The height from the engagement center to the first plane is a first height H1, the height from the engagement center to the second plane is a second height H2, and the ratio H1/H2 of the first height H1 to the second height H2 is greater than or equal to 0.5 and less than or equal to 1.4.

Abstract: A screw pile (10) comprises a hollow elongate shaft (12), a lower portion (14) rotatably mounted to the hollow elongate shaft (12), the lower portion (14) carrying a screw or one or more blades or plates (16, 18) for screwing of the screw pile into the ground. The screw pile may have a rotatable hub located at the lower end of the shaft, a rotatable hub carrying the screw or blades (16, 18). A drive tool can engage with the rotatable hub to rotate the hub and thereby rotate the blades to screw the pile into the ground.

Abstract: A fence installation system for automating the fence installation process includes a trailer apparatus. A post dispenser apparatus is configured to secure a plurality of fence posts. A post holder apparatus comprises a first robotic arm and a claw configured to secure a fence post. A post hole drill apparatus is coupled to the trailer apparatus and comprises a second robotic arm, a drill head, and an auger bit. A post driver apparatus comprises a third robotic arm and a driver head configured to drive the fence post into the ground. A fence wiring apparatus comprises a spool axle and a plurality of wire spools coupled to the spool axle. A control apparatus is in operational communication with each of the post holder apparatus, the post hole drill apparatus, the post driver apparatus, and the fence wiring apparatus.

Abstract: A boring bar apparatus comprising a boring bar having at least one tool aperture formed therein. An axial translation mechanism for axially indexing the boring bar. The axial translation mechanism comprises a feed screw assembly having a threaded section, a rotational converter mechanism coupling the boring bar to the feed screw assembly for incrementally rotating the feed screw assembly, and a feed coupling having a first end engaging with the feed screw assembly and a second end engaging with the boring bar. The first end of the feed coupling having a threaded half nut section which, in a first position, engages with the feed screw assembly to facilitate axially indexing of the boring bar, and, in a second position, disengages from the feed screw assembly to facilitate moving both the feed coupling and the boring bar relative to the feed screw assembly to assist with repositioning of the boring bar.

Abstract: The present invention provides a wave-shaped grouting bulb (100) for securing an underground bearing capacity of a steel bar (10), the bulb comprising a plurality of protrusions (120), which have a predetermined maximum diameter (D1) and are formed along the longitudinal direction of a cylindrical pillar part (110) extending downward, wherein the neighboring protrusions (120) are formed to be spaced from each other by a predetermined formation distance (s). The present invention has an advantageous effect of improving a skin friction force and resistance to compression and pullout in the grouting bulb integrated with the steel bar and thus enhancing structural stability in the micropile body.

Abstract: A refrigerator appliance and variable shelf assembly are generally provided herein. The variable shelf assembly may be mounted within the refrigerator appliance and include a stationary support screw extending along a movement axis, a mated screw, a shelving bracket, and a bi-directional ratchet gear. The mated screw may include an interior surface and an exterior surface. The interior surface may be rototranslatably mounted on the stationary support screw to rotate about the movement axis during translation therealong. The mated screw may be coaxial with the stationary support screw. The shelving bracket may be coupled to the mated screw. The shelving bracket may be rotationally fixed to translate along the movement axis. The bi-directional ratchet gear may be operably coupled to the mated screw to motivate rototranslation of the mated screw.

Abstract: A quick-exit assembly for reclining furniture, including motorized versions, is provided. An exemplary quick-exit assembly may include a linkage assembly configured to move between a first position and a second position. A drive mechanism may be coupled to the linkage assembly, and may be configured to move the linkage assembly between the first position and the second position using an actuator, and also, allow movement of the linkage assembly between the first position and the second position using manual force with reduced restriction from the drive mechanism.

Abstract: A slide cartridge having a base member and a channel defined by a pair of opposed walls. The walls extend from the base member and are configured to partially cover the rail of a horizontal directional drilling machine. The slide cartridge is supported on a carriage that is movable between the front and back of the drilling machine along the rail. The cartridge is positioned to engage the rail and to support the carriage for sliding movement along the rail.

Abstract: Provided are hand-portable directional drilling devices designed to drill through space underground, particularly for drilling channels underground from within an interior building space. Also provided are improvements in a fixable, positionable metal wrench collar and a drill stem joint breakout system.

Abstract: A method of connecting a downhole tool and a downhole tubular: positioning the downhole tool coaxially on a rotatable seat; and rotating the seat to thread the downhole tool to the downhole tubular. A support stand: a structural frame with ground engaging members; and a downhole tool seat mounted for rotation on the structural frame about an axis of rotation, the downhole tool seat being coaxial with the axis of rotation. A combination of the support stand of and a downhole tool on the seat.

Abstract: A boring apparatus, such as a drilling apparatus for forming holes in pressurized pipes, comprises a cutting head (5) mounted to a distal end of a boring bar (2) which is itself connected to a feed screw (3) by a feed nut so that relative rotation between the boring bar (2) and the feed screw (3) cause the cutting head (5) and boring bar (2) to traverse axially along the feed screw (3) while the cutting head (5) is rotated for cutting. The apparatus has a main drive motor arranged to drive the cutting head (5), boring bar (2) and a main drive shaft (4). The main drive shaft (4) and the feed screw (3) are operably connected at the proximal end through a pair of adjacent coaxial planetary gear assemblie (6) whose planetary gear carriers are liked to rotate in unison about the axis.

Abstract: A dual drive drilling system having a plurality of drill rods that make up a drill string and a steering element for controlling the path of the drill string is disclosed. The dual drive drilling system also includes a drill bit located near the end of the drill string, a first rotational drive for controlling the rotation of a steering element, and a second rotational drive for controlling the rotation of a drill bit. Further, the dual drive drilling system also includes a joystick capable of moving along a first and second axis for controlling both the first and second rotational drives, wherein the movement of the joystick along the first axis controls rotation of the first rotational drive, and the movement of the joystick along the second axis controls rotation of the second rotational drive.

Abstract: The invention relates to a drive device for driving a drill rod having a drive means with a rotary drive and a vibration drive for driving an output shaft in a rotating and axially vibrating manner and an adapter means which is coupled with the output shaft and comprises an outer adapter for connecting an outer rod and an inner adapter for connecting an inner rod. The outer adapter is adapted to transmit the rotational movement and the axially vibrating movement of the output shaft to the outer rod. The inner adapter is supported in an axially displaceable and spring-mounted manner in the outer adapter. The invention further relates to a method for operating a drive device.

Abstract: A portable power drill includes a housing, a drilling implement carrying drive spindle, and a drive motor for rotating and axially feeding the drive spindle. The drive spindle is rotatively and axially displaceable relative to the housing and connected to the drive motor via angle gears, a feed mechanism and two bevel gears supported on the drive spindle. The drive motor is drivingly connected to the drive spindle via a belt drive transmission, a feed shaft, and an angle gear including an axially locked but rotative nut piece. The feed shaft is located in parallel with and coupled to the drive motor via a transmission and drivingly connected to said nut piece. The drive motor is an electric motor controlled and monitored by a programmable control unit.

Abstract: The power tool includes a housing, an output shaft for fixing and driving a head to work, the output shaft being provided with a receiving portion extending out of the housing, a locking member for locking the head on the receiving portion of the output shaft, a fastener supported on the output shaft for fastening the locking member, and a driving mechanism rotatably displaced on the housing. The driving mechanism is operable to rotate along a first direction to make the fastener and the locking member screwed, and also is operable to rotate along a direction opposite to the first direction to loosen the fastener and the locking member. The power tool can assemble or disassemble the head quickly and provide a stable axial press to avoid the slippage of the head without any other auxiliary tools. Meanwhile, the operation method of the power tool is easy and reliable.

Abstract: A drive apparatus for a drill stem of a de-coking system is disclosed. The apparatus includes a feeder as water supply to the drill stem. The drill stem is rotatably driven by a rotational drive which includes a motor and a first and second gear box. The second gear box has an output gear which is meshed with a large gear which is connected to an outer gear rim of the feeder. A skirt envelops the gear which is formed by an output gear and by the second motor driven gear box and the gear which is connected to the feeder completely. A lower side of the skirt is open.

Abstract: A drilling rig and a drilling method, in which the drilling element is caused to rotate and is displaced along a mast by means of a drilling drive, which drilling element has a continuous screw auger disposed below the drilling drive, and an extension, which is connected to the continuous screw auger and extends upwardly through the drilling drive. A displacement head is disposed between the continuous screw auger and the extension and is adapted to force earth material into the wall of a bore hole.

Abstract: A machining tool comprises a frame mounting an extendable yoke slidable with respect to the frame in a first direction through one or more mounting pillars. A tool motor is mounted on the yoke. A drive mechanism for the yoke is also mounted in the frame, with a drive motor to drive the yoke drive mechanism. A belt is between pulleys on the drive motor and mechanism to transmit drive between them. A rotatable sleeve is around the tool motor and on which sleeve the belt engages on opposite sides of the tool motor, whereby the tool motor can extend between the drive motor and mechanism, thereby resulting in a compact arrangement of the tool.

Abstract: A synchronization mechanism of a clutch mechanism includes a drive side contact member and a driven side contact member provided on a drive side clutch member and a driven side clutch member of a clutch mechanism at positions radially inwardly of a drive side clutch portion and a driven side clutch portion, respectively. The driven side contact member does not contact the drive side contact member when the driven side clutch member is in a disengaging position. As the driven side clutch member moves from the disengaging position to an engaging position, the driven side contact member contacts the drive side contact member, so that the rotation of the drive side clutch member is transmitted to the driven side clutch member through frictional contact between the driven side contact member and the drive side contact member before the driven side clutch member reaches the engaging position.

Abstract: A portable power drill includes a housing, a drilling implement carrying drive spindle, and a drive motor for rotating and axially feeding the drive spindle. The drive spindle is rotatively and axially displaceable relative to the housing and connected to the drive motor via angle gears, a feed mechanism and two bevel gears supported on the drive spindle. The drive motor is drivingly connected to the drive spindle via a belt drive transmission, a feed shaft, and an angle gear including an axially locked but rotative nut piece. The feed shaft is located in parallel with and coupled to the drive motor via a transmission and drivingly connected to said nut piece. The drive motor is an electric motor controlled and monitored by a programmable control unit.

Abstract: A drilling machine is provided for breaking chips formed by drilling action into manageable lengths. The drilling machine comprises a first gear having a first axis of rotation, and a cam follower surface. It has a second gear having a second axis of rotation coincident with the first axis of rotation. A housing is provided configured to support the first gear and the second gear, the housing having a cam surface, a spring and a tool holder spindle having a third axis of rotation. The first and second gears are configured to impart both a linear feed and a rotation to the spindle. The first and second axes of rotation are coincident with the third axis of rotation such that the cam surface is urged into contact with the cam follower surface by the spring. The cam surface and the follower surface are shaped such that when the first gear rotates, the first gear is caused repeatedly to retract and then to advance, breaking chips that are formed.

Abstract: A hand-held power tool for driving a working tool (1) includes a drive belt (3), first and second arms (5a, 5b) longitudinally displaceable relative to each other and carrying respective deflection rollers (6) of the drive belt (3), a belt tensioning device (4) located between the first and second arms (5a, 5b) and including a spring (8) preloaded against the first arm (5a), and a displaceable pressure piston (9) located between the spring (8) and the second arm (56).

Abstract: The invention relates to a drilling implement for installing or erecting a drilling pillar in the ground, having a mast, a carriage displaceably mounted on the mast, a rotary drive located on the carriage for the rotary driving of a drill pipe and a pipe bunker connectable to the drill pipe with a storage area for fill material for filling a drill hole on drawing the drill pipe. According to the invention it is provided that the pipe bunker is axially adjustably mounted with respect to the carriage on said carriage. The invention also relates to a method for installing or erecting a drilling pillar, which can be implemented with a drilling implement according to the invention.

Abstract: A drilling machine is provided for breaking chips formed by drilling action into manageable lengths. The drilling machine comprises a first gear having a first axis of rotation, and a cam follower surface. It has a second gear having a second axis of rotation coincident with the first axis of rotation. A housing is provided configured to support the first gear and the second gear, the housing having a cam surface, a spring and a tool holder spindle having a third axis of rotation. The first and second gears are configured to impart both a linear feed and a rotation to the spindle. The first and second axes of rotation are coincident with the third axis of rotation such that the cam surface is urged into contact with the cam follower surface by the spring. The cam surface and the follower surface are shaped such that when the first gear rotates, the first gear is caused repeatedly to retract and then to advance, breaking chips that are formed.

Abstract: A pneumatic drilling machine is provided, comprising a pneumatic motor, a circuit for connecting the motor to a source of compressed air, a tool holder spindle, and a drive mechanism. The drive mechanism comprises a coupling shaft which can be moved to select a first mode of driving the spindle and a second method of driving the spindle. The mechanism has a driving cycle which comprises a stationary mode at the beginning and end of the cycle, and at least one phase for driving the spindle according to the first driving method, then a phase for driving the spindle according to the second driving method, then the stopping of the supply of air to the motor. A supply valve of the circuit is controlled pneumatically by the drive mechanism to interrupt the supply of compressed air to the motor at the end of the driving cycle.

Abstract: A pneumatic drilling machine is provided, comprising a pneumatic motor, a circuit for connecting the motor to a source of compressed air, a tool holder spindle, and a drive mechanism. The drive mechanism comprises a coupling shaft which can be moved to select a first mode of driving the spindle and a second method of driving the spindle. The mechanism has a driving cycle which comprises a stationary mode at the beginning and end of the cycle, and at least one phase for driving the spindle according to the first driving method, then a phase for driving the spindle according to the second driving method, then the stopping of the supply of air to the motor. A supply valve of the circuit is controlled pneumatically by the drive mechanism to interrupt the supply of compressed air to the motor at the end of the driving cycle.

Abstract: A new vegetation support for supporting the growth of vegetation such as vegetable plants and vines. The inventive device includes an elongate pole with alternating first and second sets of bores through it. The bores of the first set of bores are extended in a first direction while the bores of the second set of bores are extended in a second direction. Inserted through each of the bores is an elongate dowel. An auger member with a top turning portion and a bottom corkscrew portion is inserted into an opening in the bottom of the pole.

Abstract: A post hole digger has a frame attached to three-point linkage of a tractor. A boom has its proximal end pivotally connected to the frame, and an auger is pivotally mounted to the distal end of the boom. The boom is formed by a pair of laterally spaced arms, each of which is an integrally formed angled arm. The boom arms are bent from straight lengths of steel in a cold working process, to reduce manufacturing time and cost.

Abstract: A blast hole drill comprising a mast including two parallel mast cords, a carriage, and a rotary head mounted on the carriage and adapted to engage a drill pipe. The rotary head includes a drive pinion on a rack on one of the mast cords, and the drive pinion is on one side of at least one of the mast cords. A backup wheel assembly is on the opposite side of the respective mast cord opposite the pinion and includes a wheel holding assembly support rotatably supporting a backup wheel, a yoke having an opening through the yoke, a plunger threadably received in the yoke opening, the wheel assembly support being slidably received on the plunger, and Belleville washers extending around the plunger and between the yoke and the wheel holding assembly support, the Belleville washers extending between an abutment on the plunger and the wheel holding assembly support.

Abstract: A positive feed spindle with automatic retraction for driving a thread cutting tool is provided by using a fixed feed nut threaded on the spindle. A motor drives the spindle through a gear train that includes a first coupling gear with upper side teeth for engaging lower side teeth of a second coupling gear that also has upper side teeth engaging lower side teeth of a third coupling gear. The first and third coupling gears are continually driven by the motor in opposite directions through radial teeth of each. The second coupling gear on the same shaft as the first and third coupling gear is automatically raised when the spindle has been driven a predetermined extent by raising the shaft to disengage from the first and engage the third to reverse direction of the spindle. Radial teeth of the second coupling gear remain meshed with teeth of an idle gear in the drive train.

Abstract: A placement and removal apparatus for use in insertion and withdrawal of a well point and the like includes a vertical support column and a gripping carriage that may be moved vertically along the support column. The gripping carriage includes a carriage frame with first upper and second lower clamp assemblies vertically spaced apart and disposed on the carriage frame. Each clamp assembly may be rotated independently about a common vertical axis of rotation. Opposed jaws associated with the clamp assemblies have a well point engaging surface and may be moved to engage about a surface of a well point disposed threbetween so that the gripping carriage may apply vertical and rotational forces to the well point.

Abstract: An earth boring apparatus for driving a boring tool, the tool having a head for penetrating the earth and a longitudinally extending rotary drive shaft (15) for advancing the head. A carriage (18) is mounted to support frame (10) for advancing movement so as to advance and retract the drive shaft (15) and head. A drive shaft extension can be fitted between the carriage (18) and the drive shaft (15) thereby extending the effective length of the drive shaft (15). The apparatus includes a shaft engaging member (40) associated with the frame (10) and selectively operative to engage the shaft (15) having the head thereon and to inhibit rotation thereof thereby enabling the carriage (18) to be retracted and the drive shaft extension to be fitted between the carriage (18) and the shaft (15).

Abstract: A rotary drilling apparatus is disclosed, in which the pipe string is both lifted and lowered, as well as rotated, by an opposed pair of endless chains, eliminating the need for a high drilling tower structure. An advantageous form of gripping mechanism, attached to the chain links, enables the pipe string to be gripped with extremely heavy force, with the gripping means automatically confirming to pipe diameters of a variety of sizes and also conforming to the pipe coupling elements, as well as to the pipe areas inbetween, so that manipulation of the pipe string can be continuous. The gripping assembly includes a plurality of articulated gripping elements supported at each end by pivoted support arms. This assembly is urged against the pipe string by high pressure, hydraulic pistons.

Abstract: An earth auger is provided which can be compacted, lightened and adjusted with respect to feed speed according to geology. The earth auger has a screw having a spiral blade provided with notches arranged axially linearly. A first rotary member and a second rotary member arranged coaxially in a case for the screw and surrounding partially the screw are disposed rotatably about the axis. The first rotary member has a key engaging the notches of the screw, and the second rotary member has a thread groove meshing with the blade of the screw. The first and the second rotary members are rotated respectively in any one of forward and backward directions through a drive mechanism. The screw is rotated by at least one of rotational operations of the first and the second rotary members to advance or retreat relative to the case for excavating.

Abstract: A rotation device for settling a pre-molded foundation pile into the earth by imparting axial loading thereto and by imparting torque of approximately equal magnitudes to both the upper- and lowermost portions of the foundation pile. A clutch assembly comprising upper and lower pawl members is disposed on the upper end of the foundation pile. A driving rod passes through the clutch mechanism and the premolded pile. Upper and lower driving blocks of the rotation rod are faceted for nonrotationally engaging, respectively, the clutch mechanism and the lowermost portion of the foundation pile. Torque is imparted from the driving rod to the lowermost portion of the foundation pile through the lower driving block. Torque also is imparted from the driving rod through the upper driving block, the pawls of the clutch mechanism and then to the uppermost portion of the foundation pile.

Abstract: A chuck for a drilling machine is fitted to a retractable spindle 21. Plungers 25 carried by a yoke 26 move when the yoke 26 abuts the front end 20 of the machine. This charges an accumulator carried inside the chuck body. Opening a valve 39 causes the chuck jaws to clamp while closing the valve 39 and opening a valve 55 causes the chuck jaws to relax.

Abstract: A boring tool particularly useful for cutting counterbores in an engine block includes means for selectively engaging and disengaging an output shaft which is rotated and axially advanced during the cutting operation. Preferably, the selective engaging and disengaging means includes feed threads formed on the output shaft, and a threaded means which is selectively moveable into and out of threaded engagement with the feed threads on the output shaft. Preferably, the boring tool is of the differential-rate type wherein the output shaft is rotated at a first predetermined rotational rate and the threaded means is rotated at a second different predetermined rotational rate. The differential rotational rate establishes the advancement rate of the output shaft. The position of the output shaft and the cutter element it carries can be readily adjusted without necessity of operating the boring tool to establish the cutter position.

Abstract: A molded-plastic retaining member is mounted within the gear case or other internal housing member of a power tool and is keyed thereto. Screws pass through openings in the gear case cover and are received axially in respective bosses formed within the retaining member, thereby securing the gear case cover to the gear case. The gear case cover is formed with an internal hub, and locating ribs on the retaining member radially engage the hub to prevent the retaining member from disengaging the gear case, as the gear case cover is secured to the retaining member. Preferably, the retaining member comprises a partially-formed resilient ring which is molded from a suitable plastic material and is deformable during the assembly operation. Additionally, the internal hub on the gear case cover is provided with a bearing boss, and a bearing is mounted therein for journaling the rear portion of the output spindle.

Abstract: A drive mechanism for a drill provides both rotational drive and axial feed for a drill of substantial diameter such as those used to drill holes for roof bolts in mine shafts. A plurality of sprockets carry two chains of drive links which interlock around the drill shaft with each drive link having depressions which mate with scroll-like projections on the drill shaft. For axial feed, the sprockets are driven from worm drives in separate housings on each side of the chains, the worm drives being driven from gears in a gearbox which are connected through a differential gearset to a hydraulic motor. A second hydraulic motor also drives through the differential gearset to rotate the drill shaft and the entire drive chain assembly. A large diameter face seal serves as the partition between the chain drive assembly and the gearbox.

Abstract: In a positive feed power drill having a spindle drive gear train and a spindle feed gear train, and having hydraulic (air) means for actuating a piston to disengage the feed gear train for automatic retraction of the spindle, provision is made for field alteration of a valve in the hydraulic system, and associated actuating mechanism, to automatically reverse the positive feed when the spindle has been driven either (1) a predetermined extent set by a nut on the spindle which engages an arm over a valve stem and pushes the valve stem to a reversing position or (2) to a predetermined stop when countersinking, at which time the spindle stops advancing, thereby causing the spindle feed gear to have a tendency to move upwardly in the spindle actuator housing.

Abstract: A cutting apparatus with a vertical drive mechanism for in place machining f a valve seat which may include an annular turntable adapted to be rotatably mounted on the valve above the valve seat. A feed shaft is mounted through the turntable so as to be rotatable therewith, and a bottom of the feed shaft is adapted to receive a cutter for machining the valve seat. The vertical drive mechanism is mounted on the feed shaft and includes a nut threaded in the feed shaft and a gear combination. The gear combination may include a first portion which is fixedly connected to the nut, a second portion which operatively engages the first gear portion, and a third portion which operatively engages the second gear portion, the third gear portion being mounted for rotatable slidable friction engagement about the nut.

Abstract: A device for facilitating directional drilling of small diameter holes radially of a mine long hole comprising a segmented sleeve for movement through a guide channel in a main drill unit. A small bit is driven by a flexible shaft which passes through the segmented sleeve. The segmented sleeve remains partially in the guide channel and extends partially out of the guide channel in a straight line from the guide channel. The segments are joined in a manner permitting a 90.degree. turn in the guide channel but allowing no curvature in the portion of the segmented sleeve extending from the guide channel.

Abstract: A drilling and turning power head with an externally threaded spindle adapted to support and feed a tool. The spindle is supported in a cylindrical sleeve by means of bearings and is driven by pulleys and belts from a power axle coupled to a motor. An internally threaded feed hub is mounted on the spindle along with a releasably connected drive hub and both are rotated at different speeds by V-belts from the power axle. Axial feed of the spindle is brought about by the difference in the speed of rotation of the two hubs. Retraction of the spindle is brought about simply by disconnecting the drive hub from the spindle.

Abstract: A shaft drilling machine generally includes a pivotable power swivel supported on a drilling assembly moved along a mast by hydraulic cylinders. Improved means for positioning the mast include a screw jack assembly with one end adapted to be secured to the power swivel and the other end secured to the base of the machine.