Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7331410 | Drill bit arcuate-shaped inserts with cutting edges and method of manufacture Disclosed are a variety of arcuate-shaped inserts for drill bits, and in particular, for placement in rolling cone cutters of drill bits. The arcuate inserts include 360° or ring-shaped inserts, as well as inserts of smaller arcuate length. The arcuate inserts are ... | 02/19/2008 |
| 7194933 | Composite circular slicer knife A substantially circular slicer knife is provided having an interior base portion made of a first material and an outer edge portion made of a second material. The outer edge portion is metallurgically bonded to the interior base portion. ... | 03/27/2007 |
| 7117960 | Bits for use in drilling with casting and method of making the same Bits for use in drilling with a well completion string having a bit body and a cutting face that includes a plurality of sets of cutter elements mounted on the cutting face. The bit body has a central longitudinal bore having an integrated female non-shouldered, sta... | 10/10/2006 |
| 7025155 | Rock bit with channel structure for retaining cutter segments A roller cone body defines a circumferential channel or race into which a plurality of cutter or wear segments are mounted. The wear segments may be of any appropriate contour or shape, such as for example chisel, spherical, or even flat face and are preferably made... | 04/11/2006 |
| 7017683 | Cutter for tunnel boring machine A cutter for a tunnel boring machine is equipped with a cutter body (1) with a slanting surface (2), a cylindrical contact surface (12) and a preferably tapered threaded portion with specially designed threads (6), a clamping ring (4 | 03/28/2006 |
| 7000712 | Bearing seal A seal assembly for a shaft supporting a rotary element comprises a sealing ring having an inner radial surface in contact with a seal surface of the shaft. The sealing ring comprising a disc shaped integral radial lip normal to the inner radial surface. A disc shap... | 02/21/2006 |
| 6935443 | Mini disk bit A small sized disk bit includes a bit holder accommodated in a bearing journal on its side (overhangingly), and a disk body with asymmetrically designed wedge flanks mounted rotatably thereon. To enable the disk body to absorb high radial and axial strong forces enc... | 08/30/2005 |
| 6857488 | Boring head cutter A tunnel boring including a rotatable head is disclosed. The head has a cutting face transverse to a head axis of rotation. A plurality of cutters are mounted in the face each on an associated one of a plurality of hubs. The hubs mounted for rotation about a respect... | 02/22/2005 |
| 6533050 | Excavation bit for a drilling apparatus The invention provides an excavation bit, which is constructed from either a single or double carrier. If two carriers are present the carriers are contra-rotating. By the off setting of the axes of rotation of single or dual carriers from a longitudinal ... | 03/18/2003 |
| 6367569 | Replaceable multiple TCI kerf ring An earth-boring bit for removing rock and earthen formation while being rotated includes a generally circular bit body. A plurality of saddle members are mounted to the bit body, each saddle member supporting and receiving a journal member. A cutter shell... | 04/09/2002 |
| 6343842 | Roller bit for tunnel-driving machines with segmented cutting rings The present invention provides a roller bit for tunnel-driving machines. Pursuant to the invention, a cutting ring has at least two or more segments. Accordingly, it is possible to renew the cutting ring itself or different parts of the cutting ring segme... | 02/05/2002 |
| 6296069 | Bladed drill bit with centrally distributed diamond cutters A drill bit as used in particular in the oil well drilling field comprising a central body (2), cutting blades (3) protruding with respect to the body (2), both at the front of this body according to a drill direction and at the sides of this same body (2... | 10/02/2001 |
| 6230826 | Drilling apparatus an excavation bit The invention provides an excavation bit (10) which is constructed from either a single or double carrier. If two carriers (14 and 15) are present, the carriers (14, 15) are contra-rotating. By the off setting of the axes of rotation (17 and 18) of single... | 05/15/2001 |
| 6131676 | Small disc cutter, and drill bits, cutterheads, and tunnel boring machines employing such rolling disc cutters Small diameter rotary drill bits using rolling disc cutters. Novel small diameter rotary drill bits with detachable pedestal mounted rolling disc cutters are provided. The bit body has a plurality of longitudinal edge mounting slots located at preselected... | 10/17/2000 |
| 5961185 | Shielded cutterhead with small rolling disc cutters An improved disc type rolling rock cutter, and novel cutterheads employing such cutters. A rock cutter with an improved, simplified structure, with compact bearing, and smooth, rounded blade shape is disclosed. The design incorporates a cutter ring, beari... | 10/05/1999 |
| 5904211 | Disc cutter and excavation equipment An improved disc type rolling rock cutter, and novel cutterheads employing such cutters. A rock cutter with an improved, simplified structure, with compact bearing, and smooth, rounded blade shape is disclosed. The design incorporates a cutter ring, beari... | 05/18/1999 |
| 5785135 | Earth-boring bit having cutter with replaceable kerf ring with contoured inserts An earth-boring bit or head of the shaft or tunnel boring variety has a generally circular bit body. A plurality of saddle members are secured to bit body to receive and support each end of a plurality of corresponding journal members. A cutter shell or s... | 07/28/1998 |
| 5626201 | Disc cutter and method of replacing disc cutters An improved rolling disc type cutter, and novel cutterheads employing such cutters. The cutter includes a washer surface and a cutter ring assembly. The cutter ring assembly further includes an annular cutter ring with an interior annulus defining portion... | 05/06/1997 |
| 5598895 | Cutter assembly having a plurality of independently rotatable cutting units thereon A rock cutting tool with a plurality of independently rotatable cutter units and with a shaft, a sleeve located around the shaft, and at least two rotatable hubs located around the sleeve. At least one cutter unit is located on each of the two rotatable h... | 02/04/1997 |
| 5341889 | Ring clamp for a cutter ring in a tunnel drilling machine A cutter for a tunnel boring machine with cutter ring in two or more ring segments with a dovetail base, clamped to the cutter hub by a segmented clamping ring. The ring segments have a wedge shaped cross section, and are mounted in a groove. The segments... | 08/30/1994 |
| 5295735 | Rock saw A device for cutting trenches in hard rock. A plurality of disc-like primary cutters are positioned on arms around a frame. The frame rotates about a central shaft and the center shaft is moved along horizontally in the direction the trench is to be cut. ... | 03/22/1994 |
| 5253723 | Ring cutter for tunnel drilling in rock A cutter head for drilling tunnels in rock includes a rotational body with a dove-shaped groove. A cutter ring formed of two substantially identical ring halves is clamped inside the groove by a clamping ring. Pins on the cutter ring extend into correspon... | 10/19/1993 |
| 5234064 | Roller cutter assembly having adjustable ring cutter spacing A roller cutter assembly comprising a cutter hub adapted for rotation with respect to a rock face and having a peripheral surface with an axially extending width. The first cutter ring is located on the cutter hub. A second cutter ring is also located on ... | 08/10/1993 |
| 5199832 | Multi-component cutting element using polycrystalline diamond disks A diamond cutting table having the geometric characteristics of larger unleached diamond compact products and yet characterized by the physical properties of smaller leached diamond products is fabricated by forming a diamond cutter incorporating a plural... | 04/06/1993 |
| 5111894 | Uninterrupted drill bit A drill bit for drilling in the ground includes a pair of drilling cones having axes of rotation that converge near a drilling center of the bit. The cones each include a plurality of ridges or uninterrupted cutting edges. The cutting edges of each cone a... | 05/12/1992 |
| 4793427 | Disc cutters for rock working machines A hardmetal ring is a size for size or low interference fit on the body of a disc cutter of a rock working machine, such as a boxhole borer. In one embodiment the ring is gable shaped and clamped between a fixed annular shoulder and a detachable annular s... | 12/27/1988 |
| 4784438 | Tunneling machine rotatable member Twin combined radial-and-thrust antifriction bearings in a mounting for a rotatable member, such as a tunneling cutterhead or a tunneling cutter, can be tightened or preloaded by pressing spaced bearing races against a spacer ring therebetween to contract... | 11/15/1988 |
| 4751972 | Revolving cutters for rock bits A mechanism is disclosed for rock bits whereby cutting elements, rotatably mounted to fixtures with journals, are constantly forced to rotate or precess by the interaction of the earth formation and the cutter. The cutters are fixed in skewed or offset po... | 06/21/1988 |
| 4706765 | Drill bit assembly A drill bit assembly comprised of a pilot bit and a plurality of add-on reamer sections which are sized to progressively increase the diameter of the hole in measured increments. Both the pilot bit and the reamer sections have two cutter elements which ta... | 11/17/1987 |
| 4549614 | Drilling device A drilling device comprises a drilling head including a rotating body through which runs a duct for supplying, under pressure, air, or mud, or water or other drilling fluid. At least one rotating cutting element is mounted on a shaft fixed on the rotating... | 10/29/1985 |
| 4298080 | Rock cutting tools A compact and relatively lightweight rock cutting tool comprises a pair of disc cutters disposed in parallel, the disc cutters having circumferential cutting edges; a support member for the cutters disposed radially inwardly of the cutting edges thereof a... | 11/03/1981 |
| 4202418 | Roller cutter mounts Roller cutters are mounted onto a cutterhead from the rear side of the cutterhead. A load transfer block is insertable between a stator portion of each cutter and a generally forwardly directed load-carrying surface on the cutter-head frame. Loads imposed... | 05/13/1980 |
| 4102415 | Drilling device Earth drilling equipment includes a main body tube with jacks to releasably support it within a drilled shaft, or within an erected start up shaft. An outer casing is rotatably mounted within the main body tube, and carries a horizontal base on which are ... | 07/25/1978 |
| 4004645 | Disc cutting units for use on rock boring machines A rock boring machine of the kind consisting of a rotatable headplate on the front face of which is mounted a plurality of rotatable disc cutters, each disc cutter comprising an annular body, a plurality of cutting segments located on and substantially en... | 01/25/1977 |
| 3982595 | ROCK BORING CUTTER WITH REPLACEABLE CUTTING ELEMENTS A cutter with replaceable cutting elements is adapted to be mounted upon the rotary head of an earth boring machine or upon the body of an earth boring bit. The cutter is used in conjunction with an earth boring machine that functions to form circular ker... | 09/28/1976 |
| 3981370 | Disc cutting unit for use on rock boring machines A rock-boring machine of the type comprising a rotatable headplate having a plurality of disc cutting units mounted on the front face of the headplate. Each disc cutting unit includes an annular rotatable body having a continuous recess extending around i... | 09/21/1976 |
