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| Number | Title | Issue Date |
| 7762197 | Vented hydraulic vibrator assembly A vibrating device having a flywheel rotatably disposed within a housing assembly. The housing assembly includes one or more openings therethrough structured to allow an effective amount of air to pass between the housing assembly enclosed space and the atmosphere. ... | 07/27/2010 |
| 7726246 | Tamping tool The present invention comprises a tamping tool comprising a shank and a blade, with the blade having various arrangements of wear-resistant material affixed to the face of the blade by means of brazing, soldering, gluing or other method. Additionally, some arrangeme... | 06/01/2010 |
| 7398735 | Bernoulli type, non-contact air-activated lifting and tamping device A non-contact, air-activated lifting and tamping device which incorporates a means of producing a Bernouilli airflow at the device nozzle, creating an adjacent low air pressure region for inducing lift; and which includes provision for high velocity air jets for tam... | 07/15/2008 |
| 7325496 | Tamping tool The present invention comprises a tamping tool comprising a shank and a blade, with the blade having various arrangements of wear-resistant material affixed to the face of the blade by means of brazing, soldering, gluing or other method. Additionally, some arrangeme... | 02/05/2008 |
| 7143667 | Striking or pulling tool with a split head A striking and pulling tool, such as a hammer, having separate head elements secured to opposing sides of a handle. The tool may be part of a system with interchangeable components. ... | 12/05/2006 |
| 7050926 | Method of surveying a track In a method of surveying a track (9), a first or mobile measuring vehicle (1) and a second or stationary measuring vehicle (2) are placed at a distance apart from one another on a track section to be measured. A reference line (14) is for... | 05/23/2006 |
| 7013812 | Tamping tool The present invention comprises a tamping tool comprising a shank and a blade, with the blade having various arrangements of wear-resistant material affixed to the face of the blade by means of brazing, soldering, gluing or other method. Additionally, some arrangeme... | 03/21/2006 |
| 6978718 | Tamping device and method of tamping a railroad track's ballast A tamping device and method of compacting ballast beneath the intersection of a railroad track's tie and rail utilize a pair of tamping units, each of which terminates in a tool blade. When a pair of tamping unit's first and second tool blades are in ballast on eith... | 12/27/2005 |
| 6976549 | Drilling tool The invention relates to a drilling tool (1), in particular for working concrete, rock, masonry and suchlike materials, having a tool head with cutting body (5) which has at least one front rake face (9, 10), at least one rear flank ([lacuna] | 12/20/2005 |
| 6925940 | Tamping tine for a tamping unit A tamping tine for tamping ballast underneath a railroad track has a tine shank and a tine pad attached to the shank. For increasing its abrasion resistance, the tine pad is formed with a pad casing of wear-resistant material. The pad casing is formed with an openin... | 08/09/2005 |
| 6877931 | Tamping tine for a tamping machine A tamping tine has a flat inclined tine surface that encloses an acute angle with a front surface of a tine plate at the lower end of a shank. The inclined tine surface is delimited, with regard to a longitudinal direction of the tamping tine, by a bottom edge of th... | 04/12/2005 |
| 6865991 | Machine and method for tamping a track A machine is configured for tamping a track composed of rails that are fastened to ties resting on ballast. The rails extend in a longitudinal direction and have a field side and a gauge side, respectively, and the ballast forms tie supports located on the field sid... | 03/15/2005 |
| 6581524 | Conversion device for converting a rotational motion into a reciprocal motion A conversion device that is structured to be coupled to the rotating axle of a motor and to an output assembly. The output assembly has an elongated shaft with an axis extending generally perpendicular to the axis of the motor axle. The output assembly fu... | 06/24/2003 |
| 6389979 | Assembly for tamping ballast A ballast tamping tool assembly comprises two tamping tool carriers arranged successively in a longitudinal direction, a pair of tamping picks mounted on each tamping tool carrier, one of the tamping picks of each pair being arranged at a respective end o... | 05/21/2002 |
| 6386114 | Single shaft tamper with reciprocating rotational output A split tool tamper having a motor, a frame, a single tool shaft, and a tamping tool. The motor is coupled to the frame and the tool shaft is coupled to the motor. The tool shaft is further coupled to a single tamping tool.... | 05/14/2002 |
| 6220170 | Method of correcting the position of a railroad track A method of correcting the position of a railroad track composed of laterally adjacent track sections connected by branch tracks comprises the steps of measuring the position of each individual track section relative to an absolute reference system common... | 04/24/2001 |
| 6067910 | Ballast tamping assembly An assembly for tamping ballast supporting a track having two rails fastened to ties comprises a vertically adjustable tamping tool carrier and a pair of tamping tools mounted on the carrier for reciprocation towards and away from one another in the longi... | 05/30/2000 |
| 5809895 | Split tool mechanical vibrator A tamping assembly uses a split tool mechanical vibrator having corresponding front and back vibrator units powered by a single motor. A tamping tool provides easy connection to a tamping tool holder in such a way that two tamping tools may be mounted to ... | 09/22/1998 |
| 5730059 | Split tool mechanical vibrator A tamping assembly uses a split tool mechanical vibrator having corresponding front and back vibrator units powered by a single motor. A tamping tool provides easy connection to a tamping tool holder in such a way that two tamping tools may be mounted to ... | 03/24/1998 |
| 5591915 | System for the continuous measurement of the resistance of a track to transverse displacement A method of continuously measuring the resistance of a track to transverse displacement comprises the steps of continuously advancing a dynamic stabilizer along the track, applying a power to the dynamic stabilizer to impart oscillations to the track exte... | 01/07/1997 |
| 5261763 | Tamping tool A tamping tool comprising a shank having at its lower end a paddle of hardened steel construction, such paddle having a front face, and one or more bits of abrasion resistant material secured to the front, exposed face of the paddle and terminating at its... | 11/16/1993 |
| 4996925 | Tamping tools There is provided a new and useful tamping tool for a railway ballast tamping machine comprising: a shank comprising a shaft, means for fastening the shaft to a tamping machine, and, integral with the shaft, a foot including a first surface; a deformable ... | 03/05/1991 |
| 4922828 | Ballast tamping tool A ballast tamping tool for attachment to a reciprocating tamping drive of a ballast tamping machine comprises a shaft having an upper end affixed to the tamping drive and a tamping blade detachably mounted on a lower end of the shaft. A plug-in, form-fitt... | 05/08/1990 |
| 4905604 | Mobile switch leveling, lining and tamping machine A mobile switch leveling, lining and tamping machine comprises a vertically and laterally adjustable leveling and lining tool carrier frame linked to the machine frame, a pair of flanged wheels supporting the carrier frame on a main track for mobility the... | 03/06/1990 |
| 4903609 | Tamping blade with improved inserts A tamping pad includes cutout along the length of the leading edge thereof to support at least one wear-resistant insert rigidly positioned therein. The wear-resistant insert comprises a body having a first side and a second opposed side, first and second... | 02/27/1990 |
| 4848240 | Tool for positioning railway track components and method of manufacture An improved tool for railway track adjustment machines is disclosed which may be made by processes forging, casting, and which includes a shaft and a blade manufactured as separate entities and force-fitted together. In making the tool the lower end of th... | 07/18/1989 |
| 4606275 | Tamping tools Tamping tools for mounting in a ballast tamping apparatus such as the rail-mounted Canron, Plasser and Jackson ballast tamping machines designed for tamping ballast around railroad cross ties, which tamping tools each include a shaft adapted for mounting ... | 08/19/1986 |
| 4598645 | Railway track tamper A tamper has tamping tools intended for tamping the open track and the switch gear. Each tool is mounted on an oscillating and pivoting lever (6) and has a fixed pick (20) and a pick (21) displaceable by pivoting in a plane transverse to the track around ... | 07/08/1986 |
| 4563953 | Tamping head with limiting stop for tool reciprocation A tamping head for a mobile track working machine comprises a tamping tool carrier vertically adjustably mounted on the machine, a vibratory tamping tool mounted on the carrier for immersion in a crib for pivoting towards and away from an adjacent tie in ... | 01/14/1986 |
| 4501200 | Tamping tool retainer There is described a vibrating railroad ballast tamping tool head which provides ease of replacement of tamping tools, in the field. The head according to a preferred embodiment has a tamping tool holder mounted centrally on the end of a tool drive shaft,... | 02/26/1985 |
| 4488492 | Railway track tamping machine Each tamping unit of the tamping machine has a gantry (6) which is inclinable transversely to the track and in which the tool holder (3) is mounted for vertical movement. The amplitude of the downward movement of the tool holder (3) is regulated by a devi... | 12/18/1984 |
| 4476786 | Ballast tamping machine A machine for tamping ballast under a tie to which rails of a track are fastened, comprising a frame, and a tamping tool unit vertically adjustably mounted on the frame in vertical alignment with a respective one of the track rails. The unit includes a ta... | 10/16/1984 |
| 4315464 | Tamper tip for railroad tie tamping machines This invention provides a tamper tip for use with tamping machines for setting railroad ties. The tip is generally rectangular in shape and at least one surface is provided with a generally U-shaped outer edge portion which increases in thickness from the... | 02/16/1982 |
| 4221169 | Track tamper A vertically movable tamping head includes a pair of ballast tamping tool implements arranged for reciprocation in the direction of track elongation towards and away from each other. Each implement includes a rigid mounting support comprised of a vertical... | 09/09/1980 |
| 4218978 | Apparatus for tamping or packing the bed of railway tracks Apparatus for tamping the bed of a railway track comprises a wheel mounted tamping machine frame on which is mounted a vertically displaceable support for tamping tools. The tools are mounted on the tool support in opposed pairs and each tool comprises an... | 08/26/1980 |
| 4167141 | Percussive tool with replaceable work bit A percussive tool, such as a tamping tool used with railroad bed tamping apparatus, has a replaceable work bit, such as a tamping foot. The removable tamping foot is secured to a shank by a tapered force fit. A repulsive force is generated between the sha... | 09/11/1979 |
| 4160419 | Tamping tool A railway ballast tamping tool is disclosed which has a foot welded to the lower end of a shank. The foot has rectangular front and rear faces and is gradually tapered from one side to the other.... | 07/10/1979 |
| 4134342 | Ballast tamping apparatus Apparatus comprising a pair of tamping machines mounted in side-by-side disposition on a railway vehicle on a railway track for consolidating ballast supporting the railway track. Each tamping machine comprises two pairs of normally opposed tamping units ... | 01/16/1979 |
| 4111129 | Method and apparatus for the vibratory tamping of railway tracks The present invention relates to a method of an apparatus for tamping the ballast of a railroad track in which a vibration imparting tamping means is inserted into the ballast adjacent a tie to be tamped and the vibration of the tamping means is increased... | 09/05/1978 |
| 4096806 | Track tamper with hingeable unitary pivotable tamping unit In a track tamping machine, opposed pivotally mounted tamping arms are oscillated by respective single acting hydraulic cylinders controlled by one or more hydraulic duplex rotary distributing valves. Fluid supply and return lines for each piston assembly... | 06/27/1978 |
