Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7883153 | Road milling drum having an adjustable width A road milling drum assembly that is for use with a road milling machine. The road milling drum includes a core portion carrying a first road planing bit assembly wherein the core portion detachably connects to the road milling machine. The first road planing bit as... | 02/08/2011 |
| 7475947 | Extendable cutter drum for a boring machine A mining machine that includes a rotor assembly disposed on a mobile frame. A cutter drum assembly includes an intermediate drum section and a pair of end drum sections. The end drum sections are drivingly connected by the intermediate drum section. The end drum sec... | 01/13/2009 |
| 7360844 | Geosteering detectors for boring-type continuous miners The invention provides, in one embodiment, a detector for a miner comprising a gamma sensing element and a light sensing element coupled to the gamma sensing element. According to the embodiment, the detector is mounted on a rotary cutter of a boring-type continuous... | 04/22/2008 |
| 7175237 | Hewing or cutting roll In a hewing or cutting roll including a central roll part and at least one lateral roll part telescopically extractable in the axial direction of the roll, wherein the central roll part and the extractable roll part have each a connection site for a hydraulic cylind... | 02/13/2007 |
| 6929076 | Bore hole underreamer having extendible cutting arms A bore hole underreamer is provided having a hollow body with a longitudinal axis, which has an external wall, at least two cylindrical bores provided through the external wall and whose axes are transverse to the longitudinal axis. Each of the bores have a cylindri... | 08/16/2005 |
| 6431654 | Mining machine having an extendable and retractable rotor arm and method of repairing an extendable and retractable rotor arm assembly An extendable rotor arm for a mining machine includes a rotor arm having an end portion, a sleeve removably secured on at least part of the end portion, a rotor arm extension having an internal opening in which the sleeve and the end portion of the rotor ... | 08/13/2002 |
| 6244664 | Extendable end assembly for a mine face cutting roller In a hewing or cutting roller (1) of variable cutting width, in which two pivotable tool carriers (4, 5) for receiving cutting or hewing tools are arranged on at least one lateral end face (2) of the roller transverse to the axis of the hewing or cutting ... | 06/12/2001 |
| 6213560 | Variable width milling drum A variable-width milling drum assembly includes a milling drum having an outer surface. The assembly also includes a plurality of cutting segments removably secured to the outer surface of the milling drum along a first substantially helical axis. Each of... | 04/10/2001 |
| 5921632 | Method and apparatus for extending the cutter drum of a boring machine A self-propelled boring type mining machine includes a mobile frame and a pair of spaced apart rotor drive shafts extending forwardly from the mobile frame. Rotary cutter arms are nonrotatably connected to the rotor drive shafts for cutting a pair of over... | 07/13/1999 |
| 5836658 | Method and apparatus for boring and shearing of rocks A method of rock cutting where, as a first step of each excavation cycle, a second open surface is created utilizing boring method and, as a second step, the excavation cycle is completed utilizing a shearing method; and a cutting element for excavation o... | 11/17/1998 |
| 5697676 | Shield tunnel boring machine A shield tunnel boring machine having a parallel link excavator includes excess excavating cutters joined to the excavator and divided into a plurality of steps. The excess excavating cutters of the respective steps are coupled to separate corresponding j... | 12/16/1997 |
| 5439274 | Rotary mine boring head having movable links with cutter bits A continuous mining machine having a cutter frame with two rotary boring heads mounted on this frame for rotation about axes extending longitudinally of the machine. Each boring head has a plurality of radially extending rotor arms which carry and support... | 08/08/1995 |
| 5308150 | Down reaming apparatus A down reaming apparatus including a cutterhead body and a plurality of arms radially disposed on the cutterhead body with cutter assemblies on each arm. A first arm has a given length and additional arms each are of different length. Arm extenders having... | 05/03/1994 |
| 5104262 | Tunnel boring machine Tunnel boring machine comprising a number of swingable arms (11,12,13,14) provided with boring tools (41,42,43,44) for the working of the tunnel wall outside its normal diameter. The arms may be swung outwardly into an active position or retracted into an... | 04/14/1992 |
| 5096262 | Device for enlarging a chimney An apparatus for cross-sectionally enlarging a chimney flue includes a fluid motor; a milling cutter mounted on the fluid motor and being driven thereby for removing constructional wall material from walls defining the flue; a suspension device for suppor... | 03/17/1992 |
| 4889392 | Advance/retreat cutting miner and method A mining machine and method allow coal or the like to be mined substantially as quickly during out cutting as in cutting. A front cutter is mounted at the front of the frame, and a first conveyor, which preferably comprises a chain conveyer, conveys cut c... | 12/26/1989 |
| 4875738 | Arm-supported cutting roll with effective length pivotally adjustable along mining face In a cutting or hewing roll there is, for increasing the cutting width, arranged at least one lateral front surface of the roll a tool carrier being swivellable relative to the axis of the cutting or hewing roll and receiving hewing or cutting tools. For ... | 10/24/1989 |
| 4813749 | Pilot operated stepping directional valve and method for single line operation A piloted rotary two-way "on-off" valve which will couple hydraulic fluid from the valve input to the valve output in the "on" position and then move to the "off" position where it will maintain the pressure on the down stream side while enabling the pres... | 03/21/1989 |
| 4778221 | Movable device for openpit mining A movable device (1) for openpit mining has a plurality of excavating hammers (11) on a cantilever boom (2) being swivellable in height direction. For facilitating the continuous excavating work and for providing an adaptability to the varying angles of i... | 10/18/1988 |
| 4708396 | Coal shaver A coal shaver which includes cutter fronts also includes shearing blades and bottom blades at both ends of the coal shaver, for extraction work in both shaver cutting directions; the coal shaver having shearing blades attached to the shaver body and botto... | 11/24/1987 |
| 4630869 | Shield tunneling machine A shield tunneling machine comprises a tubular shield body, a partition wall provided in the shield body, a rotary shaft supported rotatably by the partition wall and extending longitudinally of the shield body, a cutter head disposed on the front end of ... | 12/23/1986 |
| 4512116 | Feed-up means for expandable work engaging members An improved drive chain for a machine tool such as honing device comprising a machine tool with at least one radially movable work engaging assembly thereon, a power train operatively connected to the honing device to rotate same, and a feed motor positio... | 04/23/1985 |
| 4507895 | Radially adjustable internal grinder An internal grinder for grinding or polishing the inner surface and the like of a cylinder or ring gauge. A plurality of grind stones (256) are held by a grind stone holding member (251) in a manner to be movable in the radial directions of a spindle (203... | 04/02/1985 |
| 4505518 | Mineral winning machines A mineral winning machine in the form of a coal plough has adjustable floor cutters. To set the floor cutters at different heights use is made of arcuate levers as carriers for the floor cutters which are slidably guided as known per se. Eccentric stop me... | 03/19/1985 |
| 4489985 | Cutter drum extension latching mechanism A continuous mining machine cutting head structure is set forth. The mining machine is of a type having a support member and an elongated mining head member mounted on the forward end of the support member. The head member is powered for rotation about it... | 12/25/1984 |
| 4406500 | Cutting assembly including expanding wall segments of auger A mining auger comprises a cutting head carried at one end of a tubular shaft and a plurality of wall segments which in a first position thereof are disposed side by side around said shaft and in a second position thereof are disposed oblique to said shaf... | 09/27/1983 |
| 4386670 | Boring head with extension elements A boring head for reaming a pre-drilled hole in raise boring or for similar earth cutting operations comprising a plurality of roller cutters (13-22). For purposes of extending the radius of the boring head (10) in operation or decreasing its dimensions d... | 06/07/1983 |
| 4339153 | Apparatus for extending and retracting the cutter bars of a boring type mining machine A self-propelled boring type mining machine includes a mobile frame and a pair of spaced apart drive shafts that extend forwardly from a gear box mounted on the frame. A pair of rotary boring heads are nonrotatably connected to the pair of drive shafts an... | 07/13/1982 |
| 4316635 | Extensible and retraciable rotor arm cutting assembly A rotor arm cutting assembly includes a plurality of cutter arm members extending radially outwardly from a hub portion which is adapted for nonrotatable connection to a drive shaft extending from the front of a mining machine. Each cutter arm member incl... | 02/23/1982 |
| 4311344 | Shield-type tunneling machine with toggle controlled bit plates in cutter disc In a shield-type tunneling machine, a pair of comb-type bit-plates are pivotally supported on a peripheral wall of each cutter slit provided in a cutter disc. In order to adjust a degree of opening of each slit as well as a cutting angle of the bits with ... | 01/19/1982 |
| 4275927 | Mineral mining plough with worm adjustable roof cutter A mineral mining plough has a plough body provided with a carrier supporting roof-level cutters. The carrier is movable vertically with respect to the plough body so as to adjust the cutting level of the roof-level cutters. A worm mounted on the plough bo... | 06/30/1981 |
| 4239290 | Hydromechanical planer with cutting and breaking heads A hydromatic planer particularly for mining materials in a mining seam comprises a planer housing which advantageously has a cutting and breaking head on each end thereof, each of which includes a substantially identical construction. Each cutting head in... | 12/16/1980 |
| 4199194 | Control means for a coal plough A coal plough which is movable to and fro in a mine working alongside a coal face, has floor-level cutters mounted on a carrier. The carrier is pivotable in a vertical plane about a horizontal axis perpendicular to the coal face. The carrier is pivotable ... | 04/22/1980 |
| 4179161 | Plough for winning material from a mineral face A plough for winning material from a mineral face comprises two plough bodies connected together in a tension-proof manner. The two plough bodies are provided with detachable cutters at each end thereof. A rigid beam, also provided with detachable cutters... | 12/18/1979 |
| 4172616 | Cutting head with self-contained power source A cutting drum for a mining machine that requires only a single supporting arm, and single interior motor for rotation of the cutting drum. The drum has two body portions which are spaced apart a distance sufficient to receive the supporting arm along the... | 10/30/1979 |
| 4169629 | Tunneling machine with plural adjustable arms carrying single cutter Machine for the digging of passages, galeries or tunnels in underground work, of the type in which the stoping device consists of a single stoping drum or mill of which the axis of rotation is practically perpendicular to the plane of the working-face, an... | 10/02/1979 |
| 4160566 | Mining apparatus An improved mining apparatus for excavating material, such as coal, for example, from an earth formation, such as a coal seam, for example, wherein a miner, having a forward and a rearward cutter, is guided through the coal seam and excavates a borehole t... | 07/10/1979 |
| 4159149 | Coal mining auger A coal-mining auger having (a) a hollow, tubular auger head with a spiral or helical coal conveyor mounted therein in concentric relation to the axis of rotation of said auger head, (b) a plurality of coal-cutting bits mounted on said auger head, said bit... | 06/26/1979 |
| 4143919 | Mining machinery with guideway for relatively movable cutting units A mining machine comprises two cutting units each including a rotatable cutting head having cutting faces directed forwardly and rearwardly with respect to the direction of movement of the machine, and an elongated housing incorporating a drive mechanism ... | 03/13/1979 |
| 4141593 | Coal plane with chain operated turning head A coal plane for use against a coal face, comprises a plane body which has a plane guide. A plane chain is arranged in the plane guide and has chain ends engaged on respective sides of the plane body. A bit support is mounted in the plane body for pivotal... | 02/27/1979 |
