Abstract: A punch for working material, such as an extrusion punch, wherein a hard wear resistant material is joined on one end to a rigid body, preferably a steel punch. The hard wear resistant material is joined on at the tip of the rigid body so as to prevent wear due to abrasion on the punch caused by the material being worked. The hard wear resistant end cap on the tip of the steel body is joined so that it may easily and quickly be replaced when the punch is in position on the machine thereby providing less down time for maintenance on the extrusion press. The method of joining the hard wear resistant end cap to the steel body minimizes the conditions which tend to fracture hard wear resistant material.

Abstract: A high pressure, high temperature, piston-cylinder type apparatus utilizing a soft, ductile, electrically conductive material as a driver element to transmit pressure from the piston to a charge in the cylinder. The driver element, preferably made of lead, or the like, is placed in the pressure cylinder between an advanceable piston and a stationary sleeve of insulating material surrounding an electrically heatable core of charge material. As the piston is advanced, the lead driver element deforms into the end of the sleeve of insulating material and maintains pressure on the core without deformation of the sleeve of insulating material.

Abstract: A high pressure, high temperature, piston-cylinder type apparatus which utilizes a soft, ductile, electrically conductive material as a driver element to transmit pressure from the piston to a charge in the cylinder. The driver element, preferably made of zinc or lead, or the like is placed in the pressure cylinder between an advanceable piston and a stationary sleeve of insulating material surrounding an electrically heatable core of charge material. As the piston is advanced, the driver element deforms into the end of the sleeve of insulating material and maintains pressure on the core with minimal deformation of the sleeve of insulating material.

Abstract: A percussion bit for use with a down-the-hole drilling motor having a hammer which reciprocates in the motor to impact on the upper end of the bit. The bit has a working position in the motor and an idle advanced position. When the bit is in the idle advanced position, the hammer advances to an idle position and, at that time, it is desired for the hammer merely to rest on the bit without impacting the bit. The hammer is reciprocated by fluid pressure and, according to the present invention, a bypass channel is formed directly in the bit which exhausts one of the pressure chambers for the hammer when the bit is in its advanced position.

Abstract: A sealing arrangement for a rolling cutter designed to protect the antifriction bearings disposed between a support shaft and a rotatable outer body of the rolling cutter. A sealing arrangement is provided comprising at least two seal means located outward from the antifriction bearing of a rolling cutter and further comprising a cavity means between the two seal means so that flushing coolant, fluid or grease may be injected into the sealing arrangement and, when injected, will carry heat, dirt and other contaminants outward and away from the interior of a rolling cutter thereby preventing damage to the antifriction bearings and the seal means located nearest to the antifriction bearings.

Abstract: A ripper tooth design is disclosed herein for use with a ripper machine wherein the ripper tooth comprises a generally U-shaped steel body when viewed in side view having a forward working end for engagement with rock formations to be broken and a rearward portion having a recess therein which is adapted for attachment to a shank, which is supported by the ripper machine. The ripper tooth according to the present invention has generally parallel side walls near its rearwardmost portion when viewed in plan, the side walls near the forward portion tapering inwardly toward the center axis of the ripper tooth. A blunt section is formed which extends generally around the front working portion of the generally U-shaped tooth and compacts of hard wear resistant material are imbedded therein to provide a longer working life for the ripper tooth.

Abstract: A tool holder in which the holder comprises a support member with a block detachably mounted in a notch on one end of the support member and with the block having insert receiving pockets for mounting cutting inserts therein. Cooperating ribs and grooves locate the block on the support member and a clamp member carried by the support member extends upwardly through a slotted portion in the block and has a head for clampingly engaging said block.

Abstract: A mining bit, especially an impact bit for down-the-hole operations and the like, in which the bit comprises a body adapted for being chucked in an impact motor for being impacted by the hammer of the motor and for being rotated by the motor. The working end of the bit includes a detachable cup-shaped cap in which hard wear resistant inserts are mounted.

Abstract: A tool holder for clamping an insert in an insert receiving pocket of the tool holder wherein the pocket has at least a bottom wall and a side wall for engaging the sides of a cutting insert. A pin member with a head on one end for engaging the top of the insert is inserted through an aperture in the insert and the other or opposite end of the pin engages a hole formed in one of the bottom and side walls of the pocket. Threaded cooperating elements of cam means formed on the other end of the pin and in the hole in one rotated position engage and clamp the insert in the pocket and axial recesses in the threads of each are adapted to receive the threads of the other so as to allow free axial travel of the pin when it is in another rotated position.

Abstract: An insert, especially a hard wear resistant insert, such as an insert of cemented hard metal carbide, for use in a mining tool or the like. The insert is especially adapted for being press fitted into the body of a mining tool or the like but may also be brazed or cemented therein. The insert has a rounded outer end and a flat inner end and tapers inwardly immediately adjacent the flat inner end and is rounded at the periphery of the flat inner end thereby eliminating stress risers in the insert and providing for easier insertion thereof into a bore in a tool body into which the insert is seated.

Abstract: An excavation tool, specifically, a down-the-hole bit which reduces a formation by being impacted axially against a formation while rotating and through which a supply of fluid, such as air, is supplied through a passage in the bit to the working face thereof to blow away the material taken by the bit and wherein the working face of the bit is provided with grooves extending outwardly from the lower end of the fluid supply passage to the periphery of the bit and in communication with axial grooves formed in the bit. The provision of the grooves in the working end of the bit in communication with the axial grooves in the outer periphery of the bit greatly improves the removal of debris which accumulates at the bottom of the hole being drilled and increases the efficiency of the bit.

Abstract: A cutting insert, especially for milling cutters or the like, which is receivable in a holder and which insert has linear edge portions which meet at the corners of the insert. The insert is indexable in the holder to present a selected edge to work to be done. Each of the edges of the inserts are serrated or notched with respective edges embodying different numbers of serrations or notches so that the inserts can be arranged in the holder to cut completely across a surface with each insert taking only a portion of the surface.

Abstract: An adjustable head arrangement for the shank of a boring bar is disclosed having an easily replaceable tool unit and also having an axially adjustable abutment means on the tool unit so that the cutting point of the tool unit is firmly supported and held during cutting operations but is adjustable with respect to the shank of the boring bar in between different cutting operations.

Abstract: A shank for an adjustable boring bar is disclosed herein having first and second members telescopically engaged in a nonrotatable relation from one to the other with one of the members having mounted thereon an axially adjustable abutment means such that rotation of the abutment means on one member provides relative axial movement between the first and second members. A recess is shown formed on the outer surface of the innermost telescopically engaged member, the recess having a declining surface in the direction of the abutment means such that a clamp element located and engaged in the outermost telescopically engaged member is operable downwardly to engage said declining surface and hold the first and second members in a firm abutting relationship.

Abstract: A positive rake cutting insert with an integrally molded chipbreaker configuration is provided which comprises a cutting edge, a land area, first and second planar walls and a central face area. The top face configuration of the positive rake insert has a land area extending inwardly from the cutting edge and joining a fillet radius. The fillet radius extends inwardly and downwardly and joins a first planar wall which is also inclined downwardly toward the center of the insert. A second planar wall is inclined upwardly from the first planar wall toward the center of the insert and joins a central face area of the insert.

Abstract: A high pressure plunger and a method of making for use in piston-cylinder like apparatus which are used for the high pressure compression of gases up to, for example, approximately 40,000 p.s.i. A high pressure plunger of the present invention comprises a tubular member of hard wear resistant material whose opposing ends are abuttingly engaged by steel end caps with the steel end caps being interconnected internally of the tubular section with a tension member so as to hold the tubular member in compression.

Abstract: A grooving and cut off tool is disclosed having a structure in which a relatively thin tool support blade has mounted thereon a replaceable cutting means and the tool support blade is reinforced by engagement with a reinforcing block so that the relatively thin tool support blade will not buckle when subjected to extremely rapid grooving and cut off operations.

Abstract: The present invention concerns anarrangement for shearing blades employing cemented hard carbide material inserts for use in shearing machines of both the rotary and guillotine type.

Abstract: A triple coated cemented hard metal carbide product in which a cemented metal carbide substrate is coated with, first, a metal carbide coating, in such a manner so as to create a carbon deficient area in the substrate, then, a metal carbo-nitride and, finally, a metal nitride coating so as to take advantage of the metal carbide and metal nitride properties in order to protect the cemented metal carbide substrate from corrosive atmospheres and abrasion due to frictional wear.

Abstract: A tool holder having an insert receiving pocket, the pocket having bottom wall and side wall means with an improved arrangement for and method of providing quick indexing or complete changing of an indexable insert. The improved arrangement comprises a pin element with a conical head on one end for engagement with a cutting insert and cooperating elements of a press-on, pry-off connection between the end of the pin and the tool holder. The insert and pin element are detachably fastened together as one unit, and when the insert is in the pocket with the pin clamped to the holder, the unit is held securely in position for cutting engagement with a workpiece.