Abstract: A post and cap assembly for chain link fence is provided, including a tubular post with an upper end, an outer surface and an inner surface. A cap is dimensioned for telescoping engagement with the upper end, the cap having an exterior surface, an interior surface and a depending skirt. At least one depending formation extends from the interior surface for engaging the post upper end, as the skirt engages the outer surface.

Abstract: A safety cover configured to be releasably secured to an exposed portion of a construction element so as to provide improved visibility thereof and provide impalement protection. The safety cover includes a body having an upper portion and a lower portion. The upper portion and lower portion of the body are integrally formed wherein the lower portion of the body extends downward from the lower surface of the upper portion. In one embodiment the upper portion includes a central support member having a curved portion with an upper impact rib structure. The curve portion further has a second rib formation opposite the upper impacts rib structure wherein the second rib formation extends downward into the lower portion. A support collar is disposed in the lower portion and is configured to engage a metal stake or bar. An impact layer can further be present in the upper portion.

Abstract: A safety apparatus configured to be releasably secured to an exposed portion of a construction element so as to provide improved visibility thereof and provide enhanced safety in the proximate environment. The safety apparatus includes a body having an upper portion and a lower portion. The upper portion and lower portion of the body are integrally formed wherein the lower portion of the body extends downward from the lower surface of the upper portion. The lower portion of the body includes three receiving members equidistantly positioned along the width of the upper portion. The three receiving members include walls forming a cavity having an opening operable to provide access thereto. One of the three receiving members has a length that is greater than the other two receiving members. Further, a pair of apertures are formed in opposing walls of one of the three receiving members.

Abstract: A sonic drilling apparatus with adapter for emplacing columns includes a sonic drilling apparatus having a fitting. An adapter is coupled to the fitting. The adapter includes a base having a socket extending upwardly therefrom and coupled to the fitting, and a coupling mechanism extending downwardly from the base. A tubular polygonal column is removably attached to the adapter by the coupling mechanism.

Abstract: A sonic drilling apparatus with adapter for emplacing columns includes a sonic drilling apparatus generating vibrational waves and having a fitting. An adapter is coupled to the fitting for removably attaching a column to the sonic drill apparatus. A centering assembly is positioned below the adaptor for receipt of a column therethrough.

Abstract: A protective sleeve for a piece of equipment, such as a marine deck or dock structure, which is intended for contact with wire rope is disclosed. The protective sleeve comprises at least one sleeve section shaped to conform to a portion of a peripheral surface of the equipment. The at least one sleeve section may comprise a first end portion, a second end portion, and a means for connecting the at least one sleeve section in end-to-end relation by connecting at least the first end portion of a first sleeve section to the second end portion of the same sleeve section or an adjacent sleeve section. In certain embodiments, the protective sleeve may be composed of a durable polymer material having a Shore D hardness of greater than about 60 or a Shore A hardness of greater than about 85.

Abstract: An installation tool for a fence post has a body having a front wall, a top wall, and side walls extending from the top wall and a rear wall. A groove is formed in the front wall. A block is positioned within the front wall. The groove extends around the block. The groove has inner walls for accommodating a post of a first dimension. The block has outer walls for accommodating a post of a second dimension, where the first dimension and the second dimension are different from each other.

Abstract: A percussive drill bit provided with an improved chuck assembly for a down-the-hole drill hammer. The bit has a head at its forward end with a shank extending from the head. The shank is screw threaded along its length. A reciprocating chuck is provided as a sleeve with internal screw thread as corresponding to those of the shank. The shank is releasably secured in the chuck with the read end of the shank providing a striking face. An arrangement of external splines on the chuck, and a retaining shoulder at its rear end, provide for the required guided movement of the chuck within a drill hammer wear sleeve.

Abstract: An impact drill that includes a drive motor located in a motor housing, an impact mechanism, and a tool fitting. The tool fitting and the impact mechanism are components of a swivel device that is located such that the swivel device may swivel relative to the motor housing.

Abstract: A tool holder for a hammer comprises a tool holder body having a forward end for non-rotatably receiving a shank of a tool. The tool holder body defines an axially extending slot. A locking body extends through the slot for releasably engaging an axially extending closed groove formed in the tool shank. A locking ring surrounds the tool holder body and in a locked positions holds the locking body in a radially inward position in which the locking body engages the groove in the tool and in a release position allows the locking body to move into a radially outward position so that a tool can be inserted into or removed from the tool holder body. The locking ring is shiftable in a direction transverse to the fore-aft axis of the tool holder body to allow the locking body to move into a radially outward position.

Abstract: A shaft comprises an input portion and a tang. The tang has a first section, a second section, and a radial bore. The second section is disposed between the first section and the input portion along an axis. A radial cross section of the first section is less than a radial cross section of the second section. The radial bore is disposed on the first section.

Abstract: A method of inserting a grounding rod includes providing an elongated grounding rod that has an upper end and a lower end and also providing a hammer drill. An elongated tubular member has an open first end and an open second end. The tubular member includes a first portion and a second portion. A dividing wall is integrally attached to an inner surface of the tubular member and is positioned at a juncture of the first and second portions. Te upper end of the grounding rod is extended into the second portion of the tubular member such that the upper end abuts the dividing wall. The hammer drill is engaged with the first portion of the tubular member. The hammer drill is turned on so that the lower end of the grounding rod is extended into a ground surface.

Abstract: The invention concerns an apparatus comprising a body (2) wherein a piston (6) is mounted sliding alternately driven by an incompressible fluid under pressure, said body containing part of a tool (4) which is guided in translation in a wear sleeve (3), the end of the tool located inside the body being subjected to the repeated impacts of the piston (6), while the other end projects beyond the body and is designed to be supported on the rock or analogue to be destroyed, the tool being retained in the body by at least a transverse key (13). One of the keys (13) retaining the tool passes through aligned holes provided in the body (2), into the wear sleeve (3), and overlaps inside the inner cylindrical space of the sleeve, the tool (4) having a transverse groove (12) for the key (13) to pass through.

Abstract: A tool holder for a hammer comprises a tool holder body having a forward end for non-rotatably receiving a shank of a tool. The tool holder body defines an axially extending slot. A locking body extends through the slot for releasably engaging an axially extending closed groove formed in the tool shank. A locking ring surrounds the tool holder body and in a locked position holds the locking body in a radially inward position in which the locking body engages the groove in the tool and in a release position allows the locking body to move into a radially outward position so that a tool can be inserted into or removed from the tool holder body. The locking ring is shiftable in a direction transverse to the fore-aft axis of the tool holder body to allow the locking body to move into a radially outward position.

Abstract: Supporting clamps for a tool such as, for example, a pile driver machine are used to tilt a machine support relative to a horizontal plane. The clamps include a pair of jaw elements one of which is received on a pivot and the other of which has a pair of parallel spaced pistons. The clamp jaw elements gird a fixed reference device to support the tool securely for subsequent operations. Different pressures applied to the two pistons causes the clamp to tilt about the fixed reference device, and thereby to tilt the tool to which it is attached. The difference in pressure is controlled to rotate the tool as desired. In a second embodiment of the invention, the desired angle is established by controlling an angle of a backup surface, and applying equal pressure to the two pistons. The fixed reference device is driven into the angled backup surface to establish the desired tilt angle. In a further embodiment, one piston is disposed at each side of the gap. The two pistons are spaced apart along the gap.

Abstract: A tool 10 for rock breaking, log splitting and similar operations includes a plate 12 having a plurality of identical apertures 14 formed therethrough. A frame 16 comprised of a skirt 18 formed from lengths of angle iron and a plurality of legs also formed from lengths of angle iron supports the plate 12 in a substantially horizontal orientation above a workpiece. An implement 22 includes a first end for engaging the workpiece and a second end to be engaged with a hammer. The implement is further characterized by dimensions closely matched to those of the apertures formed in the plate. The plate 12 positions the implement 22 in engagement with the workpiece and maintains the implement 22 in a substantially vertical orientation for engagement by an actuating hammer.

Abstract: A driving cap for forcibly driving a wooden stake or fence post into the ground. The driving cap includes a horizontal hitting surface capable of withstanding the forces exerted manually by a hitting tool, such as a hammer, and an integrally attached sleeve member. The sleeve member has at least three vertical sides which extend downward and substantially perpendicular to the hitting surface. A central passageway is created in the sleeve member which is capable of receiving the top portion of a wooden stake or fence post. During use, the driving cap is placed over the end of the stake and fence post. A bubble level is attached to one vertical side of the sleeve member which enables the user to initially position and to maintain the stake's or post's longitudinal axis in a desired position while driving the stake or post into the ground.

Abstract: An accessory for a jack hammer that includes clamping means for gripping the upper end of the stake so that the stake can be controllably driven into the ground by the user. The accessory includes a stake receiver that has a channel into which the end portion of the stake is inserted and further includes a jaw and clamping means for forceably retaining the jaw against the inserted stake. The channel includes guide ways that permit it to be used interchangeably with the more common sizes and shapes of stakes.

Abstract: An upright guide bar is provided having upper and lower ends and the lower end include structure for releasable engagement with the upper end portion of an upstanding stake to be driver downwardly. A downwardly opening drive housing having upper and lower ends also is provided and the upper end of the guide bar is guidingly telescoped into the lower end of the housing. The lower housing end includes a downwardly facing abutment surface for downward abutting engagement with the stake upper end and the lower end of the housing includes an interior guide sleeve removably mounted therein through which the guide bar is slidingly received, the upper end of the guide bar and the guide sleeve having opposing abutment surface structures limiting upward movement of the housing relative to the guide bar.

Abstract: A post driver for inserting or removing marker posts into the ground. The driver comprises two components, the hammer and the bracket, which cooperate in a safe and efficient means for installing and removing marker posts. The hammer locks around the post and the bracket attaches to the vertically aligned holes which are located on the face of the post.

Abstract: Power driving apparatus includes a body portion, a power supplying portion, an actuating portion, a drive portion, a biasing portion and a surface contacting portion. The body portion includes a vertically oriented elongated tubular section, the tubular section including a substantially open lower end. The power supplying portion includes a power source affixed to the body portion spaced from the open lower end thereof, the power source including an output shaft member disposed transversely of the body portion. The actuating portion includes a rotatable eccentric supported transversely axially within the body portion, the eccentric being spaced from the open lower body end substantially parallel to the output shaft member. An arm member has one end pivotally connected to the eccentric and extends therefrom downwardly toward the open lower body end. A weighted hammer section is supended from a lower free end of the arm member and disposed within the body portion.

Abstract: A driving device (10) for removable attachment to a post (100) to allow driving of the post into the ground is described. The device is characterized by a body portion (12) which loosely fits onto the end of the post and a cap portion (11) closing one end of the body portion to provide a surface (11a) for driving the post into the ground. Retaining means along one side of the body portion is provided in the form of a curved spring (13) which engages a side (100a) of the post. On the opposite side (100b) of the post a spring (18) loaded arm (15) urges a hook (17) into the side (100b) to stabilize the device during driving and to allow rapid removal of the device. The device is removed without damage to the post after driving.

Abstract: A tool assembly in which the tool holder 6 forms a relatively small volume of metal thereby facilitating brazing of the tool bits (21, 23) and inexpensive replacement.

Abstract: A manually operable post driver for posts (10) including a slide hammer (11) and removable anvil (12) mounted on the post for accomplishing the driving is described. The anvil (12) is rigidly secured by removable nuts (35, 36) on studs (33, 34) to the post (10) intermediate the ends of the post so that the slide hammer can be impacted against the anvil. The driver is particularly suited for U-channel posts (10) having a line of spaced holes (10d) at the bottom (10a) of the channel for mounting the anvil and having opposing blunt ends (10g and 10h). The anvil can be mounted anywhere along the post. Also a sign can be on the post during driving. U-channel posts are commonly used for road signs on highways and have blunt ends (10g, 10h) which are difficult to drive into the ground by conventional hand driving tools.

Abstract: A pile driver assembly comprising a lead, a hammer supported for longitudinal movement along the lead, a helmet at the lower end of the lead configured to receive the end of a noncircular pile, a pile guide supported for longitudinal movement along the lead and having a cross-section configured to receive the pile, and a pile rotator supported near the lower end of the lead and configured to receive the pile, the pile rotator centering and rotating the noncircular pile.

Abstract: Pile extraction apparatus having a clamping device for clamping engagement with a pile. The device is suspended from a section of casing pipe by way of a universal joint. In this way the extraction apparatus may be raised and lowered by a commercially available pipe extraction machine.

Abstract: A drive cap is disclosed for use in driving structural posts of the type which may be employed in roadside sign post structures wherein the posts have lateral generally coplanar flanges interconnected by an offset web, and wherein the posts may have different major and minor transverse axis dimensions. The drive cap comprises a drive block having a recess therein adapted to receive either of several different size structural posts in closely fitting relation therewith so as to facilitate driving of the posts longitudinally into the ground, the drive cap being adapted for cooperation with an impact type power tool for use in driving the posts into the ground.