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| Number | Title | Issue Date |
| 6019434 | Point attack bit A point attack bit has an enlarged head, an integral and coaxial shank extending from the base of the head, and a tip extending from the other end of the head and having a generally frustoconical end with an odd number of side faces disposed between the e... | 02/01/2000 |
| 5787332 | Process for recovering tantalum and/or niobium compounds from composites containing a variety of metal compounds A process for treating composite materials comprising metals and having significant radioactivity for separation into concentrated individual products is provided. The process of the invention recovers valuable metals and semi-metal elements including rar... | 07/28/1998 |
| 4952001 | Mining bit preload retainer A preload retainer in combination with a mining or construction bit having a shank carried in the bore of a mounting block. The retainer is a split resilient collar which snaps over a reduced neck in a tool shank and is tapered on one side to cam into a r... | 08/28/1990 |
| 4859257 | Fine grained embrittlement resistant tantalum wire Tantalum and tantalum-based alloys, particularly in wire form, are significantly improved in retention of a fine grain size at elevated temperatures and in resistance to embrittlement by the addition of 10 to 1000 ppm silicon and 10 to 1000 ppm thorium-co... | 08/22/1989 |
| 4834594 | Drill steel drive unit A chuck to be power driven for rotating drill bits in the mining and construction fields. The chuck is designed to drive one or more telescoped drill steels which carry a mining bit and is designed to drive drill steels with square drive ends, large hexag... | 05/30/1989 |
| 4818629 | Joint construction for lined equipment A joint construction is provided for lined equipment in which mutually weldable backing plates or sheets are lined with layer or facing sheets weldable to each other but not to the backing. An intermediate metal is optionally included between the backing ... | 04/04/1989 |
| 4799977 | Graded multiphase oxycarburized and oxycarbonitrided material systems A graded material system comprising: a refractory metal alloy base having a major metal selected from the group consisting of Group V-B metals (columbium, tantalum and vanadium), and having at least one alloy metal selected from the group consisting of Gr... | 01/24/1989 |
| 4763956 | Mining tool retainer A retainer for a mining or construction bit which bit is carried in the bore of a mounting block and which has an annular groove forming a neck at the protruding end to receive a retainer. The retainer is a split collar which snaps over the neck of the mo... | 08/16/1988 |
| 4740238 | Platelet-containing tantalum powders An ingot-derived unagglomerated (or preagglomerated) tantalum powder composition includes a platelet tantalum powder having an average FSSS of less than two micrometers, preferably in the range of 0.6 to 1.1 micrometers, a Scott density not greater than a... | 04/26/1988 |
| 4714660 | Hard coatings with multiphase microstructures A coated cemented carbide product comprising a cemented carbide substrate and a dense chemical vapor deposited coating having a microstructure of at least two simultaneously co-deposited phases which form a composite layer. The microstructure of the compo... | 12/22/1987 |
| 4678238 | Coolant sleeve for mining tools A coolant system for mining bits which are rotatably mounted in blocks secured to mining machines of the type utilizing a large rotating wheel or continuous power-driven chains. The mounting blocks for the bits have a coolant passage leading to a bore in ... | 07/07/1987 |
| 4632195 | Roof drill system An automatic drive lock drill system for roof drilling with a bit and drill steel components which are assembled axially one by one in telescoping relationship when the acircular drive shank on one part is inserted into an acircular recess in an adjacent ... | 12/30/1986 |
| 4575156 | Mining block and bit A mining block carried by power-operated moving apparatus which is apertured to receive and retain the mounting shanks of elongate mining bits having a sharp wear point extending beyond the block. A block has an open-ended cylindrical recess which ensmall... | 03/11/1986 |
| 4544403 | High charge, low leakage tantalum powders Tantalum powders for electrolytic capacitors having improved electrical capacity and low direct current leakage characteristics are produced by the introduction of combinations of carbon, nitrogen and sulfur-containing materials.... | 10/01/1985 |
| 4515230 | Roof drill bit A drill bit for use in mining, and in particular in rotative and percussion drilling action which includes a generally cylindrical body with a driving shank at one end and a transverse cutting insert at the other end. The body is hollow to conduct a sucti... | 05/07/1985 |
| 4484783 | Retainer and wear sleeve for rotating mining bits A mining bit to be mounted for rotation in a bore of a support block or on a drill steel having a retention configuration opposite the working end. A bit shank is formed with an abutment flange at the insertion end and a recess adjacent said flange to rec... | 11/27/1984 |
| 4473125 | Insert for drill bits and drill stabilizers A hard metal wear insert to be force fitted into a steel body of a tool or stabilizer which has a serrated cylindrical side surface, as in the prior art, but is provided with air relief passages on the sides to relieve air in the receiving recess as the i... | 09/25/1984 |
| 4453854 | Unitized drill steel and method of manufacturing A drill steel and method of making a drill steel with an insert which provides a male insertion segment to form a joint with the female end of a drill steel. The insert is formed with a reduced end having an annular lip and can be utilized in a die formin... | 06/12/1984 |
| 4357382 | Coated cemented carbide bodies A process for increasing the resistance to wear of the surface of hard metal parts subject to wear, such as a cutting blade of metal cutting tools, and the product which results from the process, which includes coating the surface of the hard metal, for e... | 11/02/1982 |
| 4356028 | In situ phosphorus addition to tantalum During the method of preparing tantalum powder from a tantalum rich solution in an organic solvent in which a tantalum salt is precipitated from the tantalum rich solvent and the tantalum salt is reduced to metalic tantalum by an alkali metal, a phosphoru... | 10/26/1982 |
| 4323114 | Cluster heat exchanger A heat exchange assembly which utilizes a central source of a heated fluid, such as steam, and serves as a hot fluid distribution center for a plurality of satellite chambers removably disposed on a supporting rack around the source. Each satellite chambe... | 04/06/1982 |
| 4314863 | Stainless steel castings Stainless steel castings having an as-cast hardness of Rockwell B82 to 98, good ductility and high notch toughness, and consisting by weight of 13-19% of Cr, 2.0-3.6% of Ni and 2.0-3.5% of Cu with the sum of Ni plus Cu of at least 5.0%, 0.20-1.4% of Mn, 0... | 02/09/1982 |
| 4299510 | Drill steel and method of fabrication A drill steel and method of making the drill steel which includes a tube which is opened up at one end by a first punch strike after which a male insertion element with external indentations is mounted on a second punch and driven partially into the opene... | 11/10/1981 |
| 4291104 | Brazed corrosion resistant lined equipment An improved brazed construction and method for fabrication of equipment having a corrosion resistant liner on a base metal backing is disclosed, and involves incorporating symmetrical convolutions in the liner normal to the direction of maximum thermal ex... | 09/22/1981 |
| 4278372 | Adjustable boring bar mechanism An adjustable multiple blade boring bar with diametrically disposed overlapping blade blocks, each adjustable in and out and a control cartridge having actuator pins movable in opposite directions in response to rotation of a differential screw, the pins ... | 07/14/1981 |
| 4249944 | Method of making electrical contact material An electrical contact material which is particularly well suited for use in circuit breaker switches consisting essentially of silver in the amount of about 20% to 50% by weight, nickel in the amount of about 2% to 13% by weight, phosphorous in the amount... | 02/10/1981 |
| 4248553 | Cutting insert configuration 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... | 02/03/1981 |
| 4247231 | Tool holder A tool holder for grooving and parting machining operations and the like having a cutting insert received on a support plate carried by a tool body. Recesses in the bottom and rear edges of the support plate bear on support pins pressed into the body and ... | 01/27/1981 |
| 4247233 | Micro-adjustable boring bar A micro-adjustable boring bar with an interchangeable head and cartridge utilizing a micro-adjustable key and a stationary key with an adjustment screw mounted independently on a boring bar, and a replaceable and interchangeable head having a recess for t... | 01/27/1981 |
| 4235629 | Method for producing an embrittlement-resistant tantalum wire Tantalum and tantalum-rich alloys, particularly in wire form, are stabilized against embrittlement by the addition of 50 to 700 parts per million of silicon and optionally with the further addition of 100 to 500 parts per million of carbon.... | 11/25/1980 |
| 4229128 | Reinsertable adjustable boring bar An adjustable boring bar with a boring head which can be locked, released, readily adjusted radially, removed from the basic bar, replaced in the same position of adjustment and relocked. The boring bar has a self-contained locking device and adjustable i... | 10/21/1980 |
| 4228705 | Tool holding device A tool holding device for holding a cylindrical barrel in a cylindrical chamber which includes a two-part barrel with the parts axially oriented having facing chamfers to form a V-groove which receives a split ring. The retaining barrel has a rearwardly f... | 10/21/1980 |
| 4227838 | Grooving and cut-off tool The invention relates to a cutting tool especially useful for cut-off, threading and grooving operations. The tool includes a massive block-like body with serrations along one or both sides. An adjustable plate with interengaging complemental serrations i... | 10/14/1980 |
| 4226560 | Toolholder anvil seat for indexable inserts A toolholder comprising a body having a segmental shaped recess at one end in which is secured a correspondingly shaped carrier or insert anvil provided with a tool bit accommodating pocket in which an indexable tool bit is adapted to be received, the car... | 10/07/1980 |
| 4218160 | Heavy duty cutting insert A heavy duty, indexable insert for use in single-point and multiple-point negative rake holding devices, which includes a polygonal body having conjunctive sides providing cutting edges bounding a flat, narrow, downwardly inclined land which drops off sha... | 08/19/1980 |
| 4214847 | Insert for railroad tools A finishing tool for resurfacing railroad axles which incorporates a flat diamond-shaped insert with a short chip indentation in the flat top surface near the cutting corner and adjacent one side to control cuttings.... | 07/29/1980 |
| 4214846 | Heavy duty insert A heavy duty insert for severe machining operations having a generally rectangular body with upstanding walls and rounded corners having a cutting edge extending around the periphery thereof and an upstanding mesa inboard of the cutting edge. To provide i... | 07/29/1980 |
| 4212461 | Composite high strength to weight structure having shell and weight controlled core A novel structural member, such as a tennis racket frame, having an unusually high strength to weight ratio is provided comprising an expanded foamed plastic core integrally bonded to a shell comprising at least one layer of resin-coated unidirectionally ... | 07/15/1980 |
| 4212464 | Dart body A dart body for a hand thrown dart is provided with a series of parallel circumferential grooves that provide improved resistance to slippage when the dart is propelled forward, but also provide an improved smooth release of the dart when it is released. ... | 07/15/1980 |
| 4210406 | Drill with replaceable inserts A drill body for drilling solid metal and for finish boring having, at the working end, two or more replaceable, indexable, hard metal inserts dimensioned and spaced radially to cut equal volumes of metal. The inserts are retained in pockets by a headed s... | 07/01/1980 |
