542results about "Movable tracks" patented technology

In one embodiment of the present disclosure, a switch for a powered pallet conveyor is provided. The switch comprising (a) a turntable and (b) rail portions which are arranged upon the turntable and define at least a first travel pathway and a second travel pathway, whereby the first travel pathway is defined by straight rail portions and a second travel pathway is defined by curved rail portions, so that the central line of the first travel pathway and the departure lines of the second travel pathway respectively pass through the fulcrum of the turntable.

The invention relates to a double-rope drawing endless rope continuous traction system which comprises a main track, an endless rope winch, traction wire ropes, a wire rope tension device, a shuttle car and a tail pulley positioned at the tail of the system; wherein the traction wire ropes are two groups of traction closed wire ropes which are arranged side by side; a base of the endless rope winch comprises a power part base and a driving part base which are connected with each other by a connecting piece in a detachable way; a driven shaft is provided with two same rope liners which are positioned at the two sides of a big gear; the two ends of the driving part base are respectively provided with two pairs of rope guide wheels; the wire rope tension device is formed by four hammer-type wire rope tensioning units which are arranged in a symmetrical way; two pairs of pressing rope wedge block components are respectively arranged at the two ends of the shuttle car; the tail part of thetwo traction wire ropes is provided with a tail pulley balancing device including the tail pulley, and the shuttle car is driven to move by synchronous operation of the two groups of traction wire ropes. By adopting the way of double-rope drawing, the double traction wire ropes can bear large traction force, so that the system can meet the requirement for the large traction force in coal mine auxiliary transportation.

A system for selecting digital content from at least one content source employs a plurality of RFID enabled objects that are read by one or more RFID readers. The RFID enabled objects may be, for example, RFID enabled media objects or RFID enabled non-media objects, such as any suitable RFID enabled object. Specific combinations of RFID tags and RFID enabled objects, or RFID enabled media objects provide access to more (or different) digital content than the same tags provide alone. A method includes contactlessly reading a plurality of RFID tags associated with a plurality of RFID enabled objects to obtain a plurality of RFID tag information and determining whether each of the read plurality of RFID tag information has been read within a suitable time period with respect to each other. If so, the method includes sending the read plurality of RFID tag information for receipt by a content delivery authorization unit to determine if downloadable content is available for download.

The invention relates to an electric-traction rack rail railcar. By successfully developing the electric-traction rack rail railcar, the contradiction between the rapid development of coal mining, shoring and heading equipment and underdeveloped underground coal mine subsidiary transportation equipment in China is alleviated, and the updating and upgrading of coal mine equipment in China are maximally promoted. The electric-traction rack rail railcar comprises rails and standers, wherein a cab, an anti-explosion diesel generator, an anti-explosion variable frequency motor, a three-stage gear reducer, an electric control tank, and a guiding and anti-rollover steering frame are arranged on the standers. The electric-traction rack rail railcar has the beneficial effects that the whole vehicle is electrically and mechanically driven and is powered by the vehicle-mounted anti-explosion diesel generator, and a low-speed large-torque driving manner can be realized by virtue of the anti-explosion variable frequency motor and the three-stage gear reducer; by utilizing the anti-explosion variable frequency motor, the emergency braking, the driving braking, parking braking and the like of the railcar are realized by virtue of the coordinate operation of a variable-frequency governor and a braking system; the guiding and anti-rollover steering frame with a guiding wheel can play guiding and anti-rollover roles; the electric-traction rack rail railcar is environment-friendly, safe and efficient and has an automatic function.

A gantry crane has a rigid open three-dimensional truss cross-beam. A lower I-beam and parallel upper X-beams are interconnected with angular gussets and angle irons forming a triangular open beam bounded by three trusses. Angular gussets on the sides are as parallel members to provide maximum strength. One end support is rigid, with upper ends of legs having plates bolted to one end plate extending between the X-beams. Outrigger legs have an upper plate bolted to a sloped plate at an extended end of the I-beam. Vertical support legs at the other end have a strengthening cross-member and upper vertical plates which are bolted to the end plate on the X-beams. The unusual cross-beam structure and the unusual rigid leg structure and rigid interconnection provide rigidity of the entire crane. The vertical support legs accommodate variations in tracks.

The invention discloses a monorail crane turnout junction which is highly efficient, safe and reliable. The monorail crane turnout junction of the invention comprises a top plate, monorails and a camping rail. One end of the two parallel monorails is in butt joint and coordination with the movable end of the camping rail; baffle plates are respectively arranged at the ends of the two monorails; a camping rail hinged end is hinged on the top plate and is in butt joint and coordination with a uniseriate monorail end; a positioning shaft is arranged on the movable end of the camping rail; two positioning cylinders are both fixed on the top plate; a positioning fork is arranged on the piston rod of a telescopic cylinder; the positioning fork is in plug-in coordination with the positioning cylinders; and an oscillating cylinder is in rotary coordination with the top plate. In the invention, the structure which is characterized in that the baffle plates, the positioning cylinders, the positioning shaft and the positioning fork are matched is adopted, so that the camping rail is locked and the safety is greatly improved. The operation of the turnout junction can be achieved by controlling the oscillating cylinder and the telescopic cylinder and no manual operation is needed, as a result, the operating efficiency is high and when remote control is applied, the operating efficiency is even higher.

A vehicle traction mat may include a flexible and unitary body having a central portion. A first and second ramp may be connected to axially opposed first and second ends of the central portion. A tread layer may be positioned on a top surface of the central portion and terminating prior to reaching the first and second ramps. A plurality of first studs may be statically attached to a top surface of the body and protruding upwardly from the central portion such that a top most tip of each of the first studs penetrates out through the tread layer and terminates above the tread layer. A plurality of second studs may be statically attached to the central portion and protruding downwardly therefrom. The body may be selectively rolled and unrolled between cylindrical and planar shapes during non-operating and operating conditions respectively.

An inventive traction device is provided for extricating mired vehicles from mud, snow or sand. The device is comprised of modules linked together to create a track upon which a mired vehicle drives over. The individual modules each have four walls forming a trough and a number of tire supports which rise up from the floor of the trough. The trough-like construction of the device helps prevent the device from becoming overloaded with mud deposited from mired vehicle tires.

A rail system for a powered pallet conveyor, which comprises alternative pathways having an electric cable provided on at least one of n parallel rails defining a travel pathway, wherein n≧2, whereby the rail system includes a switch for switching between m alternative travel pathways, wherein m≧2, and allowing the vehicle to continuously move across the switch after switching, said switch comprising a first actuator for selectively positioning (m*n) rigid rail portions bridging the distance between rail ends at (i) n joining points where the n parallel rails of each of the m alternative travel pathways subject to switching converge, and (ii) (m*n) continuation points where each alternative pathway subject to switching diverges downstream from the joining points. A second actuator selectively positions [m(n−1)] rigid rail portions bridging the distance between rail ends, where each alternative pathway is discontinued downstream from the corresponding continuation points.

Precipitated silicas with a high pH and their use in applications as defoamers having optimum silanol group density and a process for preparing precipitated silicas and to their use, particularly in defoamer formulations.

A lobed bushing is provided for a track assembly of a track-type machine. The track assembly includes a first chain and a second chain coupled together with a track pin. A bushing, defining a longitudinal axis, includes a central bore oriented along the longitudinal axis and extending from a first end of the bushing to a second end of the bushing for receiving the track pin. The bushing includes a first lobe positioned at a first location about the longitudinal axis and a second lobe positioned at a second location about the longitudinal axis that is less than about 180° from the first location. The first end of the bushing has a substantially cylindrical shape.

The invention relates to a mine track laying method and a rock tunnel cutting machine. The mine track laying method comprises the following steps of: cleaning and leveling the surface of a mine, cutting two sets of four parallel rock tunnels, laying profile steel on the rock tunnels, laying tracks on the surfaces of the profile steel and adjusting and fixing the tracks. The rock tunnel cutting machine facilitates cutting of the rock tunnels, can cut two equidistant rock tunnels once, and is standardized equipment for laying tracks. Compared with the traditionally laid tracks, tracks laid by the mine track laying method provided by the invention have better stability; because the profile steel is embedded into the rock tunnels, the tracks can not deflect or deviate in operation; the straightness of the tracks can be adjusted more simply and easily; a standardized operation code can be formed to ensure safety of production operation; and the provided rock tunnel cutting machine can greatly simplify the cutting process of the rock tunnels for laying the profile steel, thus being normalized and improving the efficiency.

Disclosed herein are a movable rail apparatus for transferring ships and a method of transferring ships using the same. The apparatus includes a main body, a front axle, a rear axle, support bars, side actuators, a support body, a rail and a drive unit. The front axle is provided with wheels so as to be rotatable horizontally and adjustable in height. The rear axle is provided with a wheel so as to be adjustable in height. The side actuators are provided at opposite sides under the main body and move the support bars upwards or downwards. The support body has a wheel and a lift actuator connected to the main body. The rail is moved vertically by the lift actuator. The rail is movable forwards or backwards while the wheel of the support body is put into contact with the rail. The drive unit moves the rail forwards or backwards.

A track section includes a body having a coupling portion. In one embodiment, the coupling portion includes a projection extends outwardly from the coupling portion and a recess extending inwardly into the coupling portion. In one embodiment, the recess extends downwardly through the coupling portion. In another embodiment, the recess extends from an upper surface of the body to a lower surface of the body.