Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8128178 | Cutter head for a ground cutter machine having rotary cutters The invention relates to a cutter head for a ground cutter machine having at least one cutter motor. Each cutter motor comprises: two hydraulic motors, each comprising a stator and a rotor and having a common axis; | 03/06/2012 |
| 7591514 | Cutter head for an excavator machine The invention relates to a cutter head for an excavator machine having at least one cutter motor, each cutter motor comprising: a fastener plate; a mounting structure comprising an end portion and a mounting assembly; a single hydraulic motor mounted in said mountin... | 09/22/2009 |
| 7363733 | Device and method for making a trench wall in the soil The invention relates to a device for making a trench wall in the soil comprising a frame, at least one lower cutting/mixing wheel arranged at the bottom of the frame, at least one further, upper cutting/mixing wheel arranged at the top of the frame, wherein the fra... | 04/29/2008 |
| 7168501 | Rotor system for ground milling or mine milling A rotor system for ground milling or mine milling comprising a base rotor provided with a number of support plates for accommodating tools. The tool support plates are detachably joined to the base rotor in the rotor system. A number of segments are radially arrange... | 01/30/2007 |
| 7059588 | Powered strap winder A strap winder (10) is provided for winding up an elongated strap (58). The strap winder (10) is actuated by a power-operated driver, e.g., a pneumatic torque or a wrench (12) or an electric, pneumatic or hydraulic motor (281) and ... | 06/13/2006 |
| 6945868 | Outdoor fan system A camouflaged outdoor fan system includes a housing, a fan inserted into the housing, and a camouflaged lid removably connected to the housing. The housing is buried in the ground, or in alternative embodiment, mounted to the underside of a deck, the fan is inserted... | 09/20/2005 |
| 6890037 | Cutting drum web deflector A cutting device including a cutting drum, a motor housing, a structural web extending between the motor housing and the cutting drum, and a structural member attached to the cutting drum adjacent the web. The structural member has a structural surface including an ... | 05/10/2005 |
| 6626500 | Rotary drum cutting head A rotary drum cutting head (40) has pair of rotary drums (16, 18) which present a plurality of cutting implements (42) adapted for milling rock or other excavatable terrain, and a hydraulic motor (46) centrally disposed between the pair of rotary drums (1... | 09/30/2003 |
| 6561590 | Cutting device with rotating disc A rock excavating or cutting device including a disc cutter that is driven by drive means to rotate in an oscillating and nutating manner by driving the disc cutter about separate oscillating and nutating axes aa, bb which are angularly offset from one an... | 05/13/2003 |
| 6315365 | Mining machine with core breakers In a driving or mining machine including cutter rolls or drums which are mounted for rotation on a cantilever arm pivotable in the vertical direction, bearings and/or gears are arranged in the axial direction of the cutter rolls or drums between parts of ... | 11/13/2001 |
| 6224164 | Mining machine with detachable articulated cutting assembly A mining machine that has a chassis that defines an operator area thereon and has a mining assembly attached thereto. A vertically extending shield assembly is supported on the chassis to prevent material that is dislodged during the mining process from i... | 05/01/2001 |
| 6158818 | Rock cutting head Rock cutting head comprising a one-part steel housing attachable to a working machine lug, an electric or hydro motor being attached to the rear portion of the housing and two uni-axial similar cutting drums being provided at its front portion, the rear h... | 12/12/2000 |
| 5975644 | Grinder mixer assembly The grinder mixer assembly includes a drum assembly with end plates rotatably supported on stub shafts. These stub shafts are secured to arms of a yoke assembly. The spindle of a first hydraulic motor is secured to one of the stub shafts. The housing of t... | 11/02/1999 |
| 5964507 | Transmission gearcase for multiple cutting heads An apparatus is provided for mining a mineral seam. The apparatus includes a frame, a propulsion system as well as first and second cutters and a cutter motor for winning aggregate material from the mineral seam. The apparatus is characterized by the cutt... | 10/12/1999 |
| 5685615 | Eccentrically driven percussive tools for treating materials An apparatus for treating rock, minerals or similar materials includes at least two tool-bearing sleeves supported by bearings. The tool-bearing sleeves are arranged in eccentric relationship to a common drive shaft. The tool-bearing sleeves are counterba... | 11/11/1997 |
| 5662387 | Cutter head and method for mining hard rock A cutter head for use in the removal of hard rock. The cutter head combines a standard cutting member, such as button bits or wedge-lock cutters, with cutting blades having a diamond cutting surface. The cutting blades cutting surface is positioned above ... | 09/02/1997 |
| 5626399 | Apparatus for cutting and excavating solids An apparatus for cutting and breaking rock includes a cutting disc (13) having an attached wedge (11). Cutting disc (13) can be rotated by shaft (16) to cut a groove into rock. After a pre-determined distance, wedge (11) is forced into the cut groove to c... | 05/06/1997 |
| 5553926 | Self-propelled mining apparatus and method for cutting arched opening A mining apparatus includes a frame, a mechanism for cutting an arched opening in a seam and winning the cut mineral, and a propulsion system. The cutting mechanism includes a boom supported mineral cutting drum having a barrel or bulging cylindrical shap... | 09/10/1996 |
| 5478139 | Mobile digging/cutting system A system for crushing a wall of rock comprising a first device, such as a track hoe, for moving with at least two degrees of freedom, a second device, such as an articulating boom, secured to and moving with the first device for moving with at least two d... | 12/26/1995 |
| 5203244 | Device for cutting up a component of a nuclear reactor The device comprises a support (9) provided with means (12) for its demountable fastening to the reactor structure (1) above and vertically in line with the component (3), a turret (10) mounted rotatably on the support (9) about its vertical axis, a devic... | 04/20/1993 |
| 5143423 | Drum assembly for a continuous miner A cylindrical drum assembly is rotatably mounted transversely on the front of the boom member of a continuous miner. The drum assembly comprises a pair of independently operable drum sections. Each drum section is driven through an input shaft connected t... | 09/01/1992 |
| 5108154 | Drive arrangement for shearing drums A drive arrangement for shearing drums. Final gear reduction stages are arranged inside the shearing drum (5) and at least one reduction stage is designed as a planetary gear mechanism. The first gear reduction stage arranged inside the shearing drum (5) ... | 04/28/1992 |
| 4786112 | Driving arrangement for driving the cutting rolls of a drift advancing machine In a drift advancing machine cutting rolls are rotatably supported on a centrally arranged pivoted arm. Each cutting roll has a separate drive, each of which comprises a drive motor, a drive shaft and a driven shaft being driven via a bevel gear gearing. ... | 11/22/1988 |
| 4669786 | Core breaker A core breaker comprising a plurality of bits mounted on a suitable support and capable of being readily replaced when the bit becomes worn or damaged during the breaking of a core which is left between the conventional rotating cutter drums of a motorize... | 06/02/1987 |
| 4668016 | Mining machine with adjustable jib A crawler track mounted mining machine having a frame and an adjustable jib carrying an endless cutting chain having cutters and loading flights mounted on the frame. A bridge on the frame and spaced arms having one end pivotally connected to the bridge a... | 05/26/1987 |
| 4648660 | Method and apparatus for mining machine cutter head An improved cutting head for a mining machine having a rotary cutting head and shaft removably and rotatably attached to the forward end of a mining machine such that the shaft and cutting head alone may be removed from the forward end of the machine and ... | 03/10/1987 |
| 4615565 | Tunnel or road header A tunnel or road header is provided with a caterpillar running gear and a portal frame. A cutter head means engageable with a tunnel face is mounted displaceably on the frame on a horizontal track extending transversely of the longitudinal direction of th... | 10/07/1986 |
| 4582363 | Drive assembly for mining machine cutter drum A continuous mining machine includes a mobile body portion with a cutter drum member rotatably mounted on the front of a boom member which extends forwardly of the body portion. The cutter drum member has an intermediate drum section and a pair of canted ... | 04/15/1986 |
| 4556257 | Horizontal edna miner A mining machine is utilized for making original generally horizontal bores in coal steams, and for enlarging preexisting bores. A single cutting head is mounted for rotation about a first horizontal axis generally perpendicular to the dimension of elonga... | 12/03/1985 |
| 4486051 | Mining Machine A mining machine is disclosed comprising a mobile base and a cutting head assembly at a forward end of the mobile base having a cutter drum rotatable about an output shaft disposed along the longitudinal axis of the cutter drum. A drive system for the cut... | 12/04/1984 |
| 4444434 | Continuous miner A continuous miner includes a pair of resonant beams for driving a cutting blade rigidly secured to their lower anti-nodes. By mounting the beams so that they can pivot about both upper and lower nodes, the miner may be operated to make either vertical or... | 04/24/1984 |
| 4310199 | Cutter drum assembly for a continuous mining machine A continuous mining machine includes a body portion mounted on endless tracks and a boom member extending forwardly from the body portion with a cutter drum member rotatably mounted on the front end of the boom member. The cutter drum member has an interm... | 01/12/1982 |
| 4270803 | Cutter drum drive assembly for canted end sections A continuous mining machine includes a body portion having a longitudinal axis and mounted on endless tracks. A boom member extends forwardly from the body portion with a cutter drum member rotatably mounted on the front of the boom member. The cutter dru... | 06/02/1981 |
| 4253705 | Continuous mining machine having a boom member with a fixed material dislodging means A continuous mining machine has a mobile body portion with a boom member pivotally secured thereto and extending forwardly therefrom. A cylindrical drum member is rotatably mounted on front of the boom member and includes a cylindrical intermediate sectio... | 03/03/1981 |
| 4225144 | Device for sealing the gap between component parts rotatable relative to each other A device for preventing penetration of dust from the outside inwardly into an annular gap between a cutter arm of a cutting machine and a rotatable cutting head carried on said arm, said cutting head having an interior space containing lubricating oil, sa... | 09/30/1980 |
| 4225189 | Continuous mining machine and cutter drum drive therefor A cutter drum member of a continuous mining machine is rotatably mounted on the front end of the machine. The drum member includes an intermediate section and a pair of canted end sections. Cutting elements extend from the surface of the respective drum s... | 09/30/1980 |
| 4162104 | Cutting machine A cutting machine having a universally movable cutting arm provided with a plurality of cutting heads in which the cutting machine's oil reservoir is mounted within the cutting arm and cooled by the water cooling system for the cutting machine's motor. Th... | 07/24/1979 |
| 4098539 | Cutting machine A cutting machine has at each side of a universally pivotable cutter boom a cutting head which is rotatably supported around an axis extending vertically to the longitudinal direction of the cutter boom and which is advanced in direction of its axis when ... | 07/04/1978 |
| 4084854 | Drag bit excavation In a drag bit excavating device having a plurality of cutting elements, each element comprising a core extending along an axis; a bit carrier supported on the core; cutter bits supported by the carrier along a three dimensional spiral having constant pitc... | 04/18/1978 |
| 4080002 | Locking device for mining machine trim chain take-up An improved locking device for a trim chain take-up for mining machines in which the trim chain extends around the auger and the auger support arms and is driven by the auger to cut clearance for the support arm. The take-up is slidably mounted behind the... | 03/21/1978 |
