Abstract: Methods and apparatus for diverting fluids either into or from a well are described. Some embodiments include a diverter conduit that is located in a bore of a tree. The invention relates especially but not exclusively to a diverter assembly connected to a wing branch of a tree. Some embodiments allow diversion of fluids out of a tree to a subsea processing apparatus followed by the return of at least some of these fluids to the tree for recovery. Alternative embodiments provide only one flowpath and do not include the return of any fluids to the tree. Some embodiments can be retrofitted to existing trees, which can allow the performance of a new function without having to replacing the tree. Multiple diverter assembly embodiments are also described.

Abstract: One embodiment provides an adjustable guide 10a to steer the end 90 of a pipe string 88 into position to be engaged and supported by a pipe gripping apparatus such as, for example, an externally gripping elevator assembly 10. The adjustable guide 10a may comprise a plurality of angularly distributed guide inserts 30, each having a sloped surface 30A to engage a pipe end 90. Another embodiment provides an adjustable guide 60a to steer a pipe connection into position to pass through a spider 60. The guide inserts 30, 80 of an adjustable guide may be controllably positionable to together form a guide that is concentric with the bore of the tapered bowl of an elevator assembly or a spider. One embodiment comprises a guide insert retainer 11 having a plurality of channels 28, each slidably receiving a guide insert 30 and positionable by rotation of a threaded shaft 40.

Abstract: A wear-resistant sealing system for introducing fracturing fluids to a wellhead comprising a tubular connector having a retaining shoulder and bridging a flange interface created between a frachead and a lower tubular structure. The tubular connector has upper and lower sealing elements above and below the flange interface and forms a contiguous bore for fluid communication of the fracturing fluids from the frachead to the lower tubular structure and wellhead.

Abstract: A device for use in retrieving debris from a well, including an elongate body; a main bore extending part way along a length of the body; an opening towards a lower end of the body; a main fluid chamber in the body in fluid communication with the main bore; a flow restriction provided in the main bore, through which fluid flows from the main bore and into the main fluid chamber; at least one chamber outlet for directing fluid from the main fluid chamber into an annulus defined between the device and a well borehole wall; a return flow passage extending between the body opening and the main fluid chamber, for return flow of fluid from the annulus to the main fluid chamber, to facilitate retrieval of debris from the well; and at least one fluid exit, for flow of fluid out of the device.

Abstract: A fluid flow control apparatus includes a flow path that conveys the fluid into a wellbore tubular, a first passage formed along the flow path, an annular space receiving the fluid from the first passage, and a second passage receiving fluid from the annular space. The passages may flow the fluid in an axial direction along the flow path. The apparatus may include an enclosure that receives a sleeve in which the passages are formed. The annular space may be formed between the sleeve and the enclosure. The passages may include an inlet that reduces a pressure of the fluid flowing through the inlet. The passages may include a bore and may include parallel conduits. The first and the second passages may convey the fluid in a first axial direction, and the annular space may be configured to convey the fluid in a direction opposite to the first axial direction.

Abstract: A release device includes a first sub, a second sub, and a connector separably connecting the first and the second sub, wherein the connector includes a shear member disposed with the first sub and a collar connected between the second sub and the shear member.

Abstract: Improvement in the compatibility of hydrocarbon and water is achieved by surface active agents newly synthesized by mixed microbial populations. Methods for enhancing the microbial production of surface-active agents in hydrocarbon-exposed surface waters can be achieved by supplementing the mixed microbial population with one or more carbon sources, most notably propionate. Hydrocarbon-exposed surface waters having enhanced levels of surface-active agents can be used to improve hydrocarbon recovery from subterranean formations or for remediation of hydrocarbon-contaminated sites.

Abstract: An aqueous fluid system that contains an aqueous dicarboxylic acid solution, a viscoelastic surfactant as a gelling agent to increase the viscosity of the fluid, and an internal breaker such as mineral oil and/or fish oil to controllably break the viscosity of the fluid provides a self-diverting acid treatment of subterranean formations. The internal breaker may be at least one mineral oil, a polyalphaolefin oil, a saturated fatty acid, and/or is an unsaturated fatty acid. The VES gelling agent does not yield viscosity until the organic acid starts to spend. Full viscosity yield of the VES gelling agent typically occurs at about 6.0 pH. The internal breaker allows the VES gelling agent to fully viscosify the spent organic acid at 6.0 pH and higher, but as the spent-acid VES gelled fluid reaching reservoir temperature, controllable break of the VES fluid viscosity over time can be achieved.

Abstract: An electric plasma arc apparatus and method produces nitrogen compounds, solely using ambient air extracted in proximity to the apparatus. The nitrogen compounds are brought into contact with a water processing system, forming nitrate on-site. Hydrogen sulfide present in the water processing system is removed, and the production of hydrogen sulfide by sulfate-reducing bacteria (SRB) is eliminated by introducing nitrate into the system, whereby denitrifying microorganisms, using the nitrate, outcompete the sulfate-reducing bacteria for the available carbon nutrients, thus preventing the SRB from producing hydrogen sulfide. Nitrate ions generated in the water processing system which contains the denitrifying microorganisms can enhance oil recovery by means of microbial enhanced oil recovery mechanisms.

Abstract: An integral polished bore assembly for use in a wellbore. The assembly includes a barrel having a polished bore; at least one no-go member positioned within the barrel; an elongated locator member having a sealing head and an end, the end extending out of the barrel; and a radial port formed through the barrel.

Abstract: Methods and apparatus for diverting fluids either into or from a well are described. Some embodiments include a diverter conduit that is located in a bore of a tree. The invention relates especially but not exclusively to a diverter assembly connected to a wing branch of a tree. Some embodiments allow diversion of fluids out of a tree to a subsea processing apparatus followed by the return of at least some of these fluids to the tree for recovery. Alternative embodiments provide only one flowpath and do not include the return of any fluids to the tree. Some embodiments can be retro-fitted to existing trees, which can allow the performance of a new function without having to replace the tree. Multiple diverter assembly embodiments are also described.

Abstract: A method of repairing a damaged portion of a casing in a wellbore includes running a bottom hole assembly (BHA) into the wellbore on a conveyance and locating the BHA proximate the damaged portion. The method further includes engaging an inner wall of the casing with a friction member, rotating the conveyance thereby rotating a portion of the BHA, maintaining a portion of the BHA stationary with the friction member. The method further includes pulling the inner string, thereby engaging the inner wall of the casing with an anchor of the BHA and disconnecting a frangible connection with the anchor. An inner string is coupled to an expansion member and pulling the inner string and thereby the expansion member through an expandable tubular expands the expandable tubular into engagement with the inner wall of the casing thereby repairing the damaged portion.

Abstract: A tubular member for lining a wellbore, the tubular member comprising: an inner tubular member including a first end, an opposite end, an axial bore extending from the first end to the opposite end and an outer surface; an outer tubular including a base end and an outboard end, the outer tubular connected about the inner tubular adjacent its base end and a locating profile in the axial bore of the inner tubular.

Abstract: A horizontal offline stand building system includes a substantially horizontal, elongate catwalk having a frame and a stand lifting arm. The catwalk has a top surface adapted to receive at least two tubulars aligned coaxially along a linear path in a make-up channel on said top surface. The tubulars are threaded together to form preferably at least a triple pipe stand in the make-up channel. The completed stand is then transferred laterally to a delivery channel containing the stand lifting arm. The stand lifting arm is selectively actuable lifting arm for selectively elevating a rig end of a pipe stand from said top surface of the catwalk to the deck of a drilling rig, and then for supporting the mid and rear sections as the stand is hoisted from the delivery channel up the derrick of the drilling rig.

Abstract: The instant invention relates to a fire extinguishing apparatus. Particularly to an apparatus that includes at least one container that includes a fire retardant gel. The gel is formed from dehydrated superabsorbent polymer and water. The pre filled containers include at least one control valve or frangible portion to release the fire retardant to extinguish the fire.

Abstract: A firefighting apparatus on a small all-terrain utility vehicle has a U-shaped water tank closely spaced from the driver's cab. A reel for a high-pressure hose is mounted in the U of the water tank. A high-pressure engine driven pump is connected to the reel and a high-pressure hose through a water management system, which directs water from the water tank to the pump, and from the pump to the hose. The pump has a pressure valve which sets the engine idle when the high-pressure water nozzle is closed. A pressure unloader valve recirculates water from the pump outlet to the pump inlet when the nozzle is closed. A check valve is used between the water tank and a point where water recirculates to the pump. A prefilter is connected between the check valve and the water tank.

Abstract: A turf leveling device including a metering blade together with first and second horizontal and parallel main blades separated by first and second open distances. The blades are supported by a frame with spaced frame arms adapted to provide three point hitch attachment points. Skid plates mounted on left and right sides of the frame prevent the metering blade from scrapping or cutting elevated areas of the turf surface. The metering blade and the first and second main blades with deflectors effectively redistribute and level the gathered material. A vertically adjustable verticutting knife roller having keyed knife discs extending through slots in a grating insert is preferably disposed in the first open distance.

Abstract: An implement with a ground working tool mounted on an arm pivotably movable between raised and lowered positions includes a pneumatic down pressure control system. The down pressure control system includes upper and lower mounts with an air spring located between them and having compressed and extended configurations with said arm raised and lowered respectively. A parallel plate mechanism maintains the upper and lower mounts in parallel relation and maintains a relatively consistent down pressure of the air spring. Multiple air springs can be provided on an implement and pneumatically interconnected by an air line for simultaneously charging to a constant air pressure.

Abstract: A wavy disc and coulter with notches and method of using same, the disc or coulter having plurality of waves formed in the blade by deviating the entire outer periphery of the variable wave coulter from a flat plane. A plurality of crests and a plurality of valleys are formed in the blade, wherein each of said plurality of waves comprises a first and a second crest and one valley between the first and second crests at the outer periphery thereof. A notch is disposed in each respective wave on the outer periphery of the blade and wherein at least a majority of the notch is disposed between the first one of the respective crests and the respective valley, such majority of the notch being closer to the first respective crest than to the second respective crest.

Abstract: A fluid distributor cylinder is for a percussive drill assembly that includes a casing having an inner circumferential surface defining a central bore, a central axis extending through the bore, a bit movably coupled with the casing and a piston movably disposed within the casing bore. The distributor cylinder includes a generally tubular body disposeable within the casing bore and having first and second ends, a central axis extending generally between the first and second ends, an outer circumferential surface. At least a section of the outer surface is configured to engage with the inner surface of the casing so to form an interference fit between the body and the casing. The cylinder includes an exterior thread and/or a radially-extending shoulder configured to releasably engage with the casing inner surface so as to substantially prevent axial displacement of the distributor body with respect to the casing.

Abstract: A method of drilling or gas-lifting is disclosed where the methods including the use of a foaming agent and a gas, where the foaming agent is a keratin and the hydrostatic pressure of the fluid in the well is for a portion of the drilling or gas-lift operation less than an hydrostatic pressure of the formation being drilled or under production.

Abstract: A system for controlling drilling mud density in drilling operations that combines a base fluid of lesser/greater density than the drilling fluid required at the drill bit to drill the borehole to produce a combination return mud in a riser. Concentric tubular members are disclosed, wherein one tubular member, such as the drill string, is utilized to inject the drilling fluid into the wellbore. Another tubular member carries the combination fluid to the surface for separation by a centrifuge system. By combining appropriate quantities of drilling mud with another fluid, the density of the combination fluid carrying drill cuttings to the surface can be regulated. During separation by the centrifuge, a weir plate having an adjustable height is utilized in the centrifuge to regulate the separation of the base fluid from the drilling fluid, producing a high density fluid and a low density fluid.

Abstract: Controlling drilling mud density in drilling operations utilizing concentric drill tubes and at least two different density fluids. The mud required at the wellhead is combined with a base fluid of a different density to produce diluted mud in a riser. By combining the appropriate quantities of drilling mud with base fluid, greater control over the pressure in the wellbore and various risers can be achieved. Concentric drill tubes or risers are disclosed, wherein a first annulus defined within one riser is utilized to carry one fluid to the wellbore injection point, while a second annulus defined within another riser is utilized to carry a combination fluid and cuttings back to the drilling rig. In one embodiment with three concentric drill tubes, a third annulus is also define, wherein the various annuli can be utilized in various combinations to deliver at least two different fluids to the wellbore and return a combination fluid from the wellbore.

Abstract: A method of treating a subterranean formation including providing a well bore that includes a filter cake on at least a portion of the well bore and contacting at least a portion of the filter cake with a filter cake degradation fluid comprising a relative permeability modifier. The method also includes allowing the relative permeability modifier to retain at least a portion of the filter cake degradation fluid in the well bore for a time sufficient to contact the filtercake and allowing the filter cake to degrade.

Abstract: An earth bit includes a cutting cone rotatably mounted to a lug with a journal. A sealing member is sealingly engaged with the cutting cone and a wear ring carried by the lug. The wear ring is dynamically engaged with the first sealing member and statically engaged with the lug.

Abstract: A reamer for subterranean wellbores may include a composite framework, which may include one or more high strength stems, each having one or more reamer bodies coupled thereto. The body may include a plurality of plates coupled together and may include additional components formed integrally therewith or coupled thereto. A method of forming a reaming tool may include forming a high strength stem and a reamer body and coupling the body to the stem. A method of using the reaming tool may include coupling one or more bodies in a drill string and reaming a wellbore.

Abstract: In a broad respect, vehicles that are capable of making a low- to zero-radius turn using the independent rotation of drive wheels and by turning the non-driving steerable structure or structures (such as wheels) with a steering input device (in some embodiments, the driving wheels also may be capable of being turned). This may be accomplished using a steering system, a speed control system and an integration device (together, a control system) that are configured to work together to provide correct steering in forward and reverse, and, in some embodiments, to reduce the speed of the outboard drive wheel of the vehicle when it enters an extreme turn under constant speed input. Different systems configured for use in such vehicles are included.

Abstract: In a crawler vehicle, at the time of crane operation at a place where a grounding space of crawlers is limited, a land leveling preparation is suppressed as little as possible so as to improve efficiency of the operation. The crawler vehicle is provided with left and right crawler frames on the both left and right sides of a track frame. The crawler frames can be moved between an expansion position for maximizing a distance between centers of the crawlers and a contraction position for minimizing the distance. Further, the crawler vehicle can position the crawler frames to the track frame at an intermediate position in the middle of the expansion position and the contraction position.

Abstract: A hybrid vehicle drive device includes a clutch that transmits and separates a driving force between an engine output shaft and a transmission input shaft; a first electric motor having a first rotor that is connected to an engine output shaft side of the clutch; a second electric motor having a second rotor that is connected to an transmission input shaft side of the clutch; and a radial vibration suppressing device, wherein (1) the first electric motor is connected to the engine output shaft via the radial vibration suppressing device, and (2) the radial vibration suppressing device suppresses a vibration of the engine output shaft in a radial direction.

Abstract: A parallel hybrid vehicle includes a heat engine, a transmission including an input and an output, and an electrical device. The transmission input is coupled to the engine and the transmission output is coupled to the electrical device such that substantially all of the torque generated by the heat engine is channeled through the transmission to the electrical device, and a differential, the electrical device coupled to the differential such that during a first mode of operation the electrical device functions as a motor to receive substantially all the torque generated by the engine through the transmission, and such that during a second mode of operation the electrical device functions as a generator to receive substantially all the torque generated by the vehicle through the differential. A method of retrofitting a vehicle is also provided.

Abstract: An electric drive machine includes an internal combustion engine remotely coupled to an electrical power generator, which is electrically connected to an electrical components system. The electrical components system is electrically connected to a pair of electric drive motors that are configured to drive wheels of the electric drive machine. A cooling system includes a blower fluidly connected to, and positioned downstream of, the electrical components system. The blower is fluidly connected to, and positioned upstream of, the electrical power generator and the pair of electric drive motors.

Abstract: The jalousie for the control of the air flow through the engine cooler of a vehicle has rotatable fins (2), which are supported on one side in an outer housing ring (47) provided for the connection with the engine cooler of the vehicle and on the other side in an inner supporting ring (4). The swivelling of the fins (2) occurs with an adjusting ring (45), whose engaging portions (46) work together with counter-engaging portions (10) provided at the fin ends. The adjusting ring (45) with its engaging portions (46) and the counter-engaging portions (10) of the fins (2) are enclosed together on all sides in a hollow space (49) circumferentially extending around along the adjusting ring (13, 45) for the protection against contaminants and consequently for its safe function, which is limited by two profile rings (47, 50) interlocking with each other all around.

Abstract: A hood assembly includes a first hood and a second hood. The second hood is selectively rotatable with respect to the first hood to provide rapid access to components enclosed by the second hood, such as a radiator. The first and second hoods are selectively rotatable together to provide access to components enclosed by the first and second hoods, such as an engine.

Abstract: Disclosed is a tractor-trailer including a tractor having a lower tractor duct that receives first air from a front of the tractor and channels the first air through a center area of the tractor and down between a set of rear wheels, a trailer having a lower trailer duct positioned below a cargo space and that channels the first air in the lower trailer duct between each set of trailer rear wheels and a lower articulation duct positioned near the set of rear wheels in the tractor that receives air from the lower tractor duct and communicates air to the lower trailer duct. An upper duct is also provided with an articulation duct that channels air through a ductwork at the top of the trailer and tractor. A louver system at the rear of the trailer enables the air in each duct to be channeled and pulled out of the respective duct in such a manner as to reduce drag and eddy currents using the vacuum at the rear of the trailer.

Abstract: An adapter apparatus is provided for use in mounting two oil filter cartridges on an engine. The adapter apparatus includes a manifold for interconnecting the oil filters, and for allowing oil to flow in series through the oil filters and an engine. The manifold includes a metal manifold block having an outer face, an inner face, and at least one lateral edge with a plurality of cooling fins thereon. The manifold block has a plurality of hollow flow passages formed therein to route oil therethrough. Two sleeve fittings are attached to the manifold block, and each of the sleeve fittings has male threads formed on an outer surface thereof. Each of the sleeve fittings threadably receives one of the oil filters thereon. The apparatus also includes inlet and outlet tubes attached to the block body, for respectively routing oil to and away from the adapter apparatus.

Abstract: A power transmission device for a four-wheel drive vehicle includes an input shaft adapted to be driven by a power source. A first output shaft is rotatable about a first axis and adapted to transmit torque to a first driveline. A second output shaft is adapted to transmit torque to a second driveline and is rotatable about a second axis. The first and second axes diverge from one another. A transfer unit includes a drive member driven by the first output shaft and a driven member driving the second output shaft. A spline coupling is positioned within a cavity formed in the driven member to drivingly interconnect the driven member and the second output shaft. The second output shaft is axially moveable relative to the driven member.

Abstract: Vehicle seat belt apparatus includes an electric-type pretensioner that includes a motor for rotationally driving a belt reel to take up a belt. The apparatus also includes: a take-up position detection section for detecting a take-up position of the reel; a traveling condition determination section for determining that a traveling condition of the vehicle has varied to a predetermined condition; and a control section for controlling power supply to the motor, on the basis of a signal output from the determination section, to thereby control a driving amount of the motor but also for controlling the reel, in accordance with a detection signal output by the take-up position detection section, so that the reel is kept at a predetermined take-up position, to thereby hold a vehicle occupant in a seat with the belt.

Abstract: A motor vehicle having a unit, particularly a drive assembly, which is operated by a fuel that is cryogenically stored in a vehicle tank, is provided, in which fuel is heated by a heat exchange with a warmer medium. The fuel taken from the vehicle tank comes in contact with the cold side of a thermoelectric generator, particularly in the form of a Seebeck element, in order to generate electric current for the electric power supply of the vehicle. The warm side of the thermoelectric generator is preferably acted upon by the warmer medium also used for the heat exchange with the cold fuel, in which case the thermoelectric generator may be integrated in a heat exchanger for the heat exchange between the fuel taken and the warmer medium.

Abstract: A weight balance of a vehicle body is provided in an all terrain vehicle wherein an engine is supported by a vehicle body frame and an electric power steering device having an actuator unit is provided on a steering shaft. An electric motor is provided in the actuator unit, and heavy objects including a battery and a muffler are disposed on an opposite side to the electric motor in a vehicle width direction with respect to a vehicle body centerline extending in a longitudinal direction of the vehicle and on an opposite side to the electric motor in the longitudinal direction of the vehicle with respect to the engine. To shorten and reduce weight the steering shaft is supported on a vehicle body frame through a radial bearing and ball bearings. Of the plurality of bearings, at least one of the bearings is made self-aligning.

Abstract: An electric power steering system includes a steering wheel, a rack-and-pinion type steering gear box connected to the steering wheel, a steering torque sensor, a pinion shaft, and a steering actuator mounted on the pinion shaft to assist a steering operation conducted by a driver. An overload preventing control is conducted so that a sum of a current conversion value of a steering torque detected by the steering torque sensor and an assist current calculated based on the steering torque becomes equal to a limit value. When the steering gear box has reached a stroke end, the assist current is prevented from excessively increasing, thereby preventing a reduction in durability of the steering gear box or a motor of the steering actuator.

Abstract: An on-wall loudspeaker and mounting apparatus includes an enclosure, a loudspeaker driver mounted in the enclosure, brackets of equal length and attachable to a wall, arms of equal length pivotably attached to the brackets and pivotably attached to the enclosure, each arm pivotable perpendicular to the wall. A movement of a cone in the driver is parallel to the pivoting of the arms when an alternating current signal is applied to the driver. The present invention mitigates vibrations transmitted to walls and other building structures, and provides improved means for reproducing low frequencies below a range of conventional loudspeakers.

Abstract: A fan system includes a rotor supported for rotation about a fan axis. The rotor has a central hub and a plurality of blades each extending outwardly from the hub to a tip. The rotor blades define a rotor plane perpendicular to the fan axis. A first acoustic resonator has an opening disposed on a first side of the rotor plane and a second acoustic resonator has an opening disposed on a second side of the rotor plane. The acoustic resonators are configured to provide a dipole resonator system operable to at least partially reduce a blade pass frequency tone in an upstream and a downstream direction simultaneously.

Abstract: In a vehicle exhaust device, rear wheels are disposed outside of rear side members extending in a vehicle front-rear direction. Opening portions are formed at side portions, in the vehicle width-direction, of a rear bumper. Diffusers extending into the rear bumper are mounted in the opening portions. Mufflers are disposed at a rear portion of the vehicle with axes of the mufflers extending in the vehicle front-rear direction, and tail pipes connected to rear end faces of the mufflers are inserted into the diffusers while spaced from inner peripheries of the diffusers. The mufflers are disposed on rear sides of the rear wheels in the vehicle front-rear direction with outer peripheral faces of the mufflers protruding outside the rear side members in the vehicle-width direction, and with the rear end faces of the mufflers facing front end opening portions of the diffusers.

Abstract: A tuned acoustic attenuation device includes a housing defining a chamber within with air inlet and outlet channels opening into the chamber. An acoustic chamber or chambers are arranged on an exterior wall of or alternately within the housing and positioned to extend in a substantially lateral parallel relationship to the inlet or outlet channel and are configured as quarter wave tuners. The acoustic chambers may be realized within the housing by adapting housing stiffening support ribs of the housing. The acoustic attenuation characteristics of individual acoustic chambers cooperate to broaden the sound attenuation bandwidth or increase the attenuation at selected noise frequencies.

Abstract: A motor vehicle exhaust line silencer includes: an upper shell (2) having a substantially flat upper end wall (16); and a lower shell (4) having a substantially flat lower end wall (24) parallel to the upper end wall (16), the upper and lower shells (2, 4) delimiting between them an internal volume (6) of the silencer (1). The silencer (1) includes at least an internal partition wall (12) substantially parallel to the upper (16) and lower (24) end walls and arranged in the internal volume (6), the upper (16) and lower (24) end walls having respective reliefs (48, 50, 52) projecting into the internal volume (6) and cooperating to immobilize the internal partition wall (12).

Abstract: An inflatable, noise attenuating panel or barrier, comprised of an inflatable air chamber coated with (wrapped in or attached thereto) an acoustic barrier material, with which to construct a variety of structures that benefit from a degree of soundproofing.

Abstract: An anchor system for a personal fall protection system having belay lines extending between vertical supports includes modular components adapted to be mounted to virtually any structure while permitting the installation of one or two belay line runs. A mounting plate interfaces with the vertical support, while one or two support plates are supported by the mounting plate and by anchor elements extending through each of the plates. Each support plate includes a shuttle guide and is configured to connect to belay line segments running between successive anchor systems and forming the complete belay line course. The fall protection system is further provided with a transfer station that allows a person to transfer from one belay line to another.

Abstract: A fall protection apparatus includes a single longitudinally extending rigid rail onto which two laterally spaced apart moveable lanyard anchorages are mounted. The rail has a generally H-shaped cross-section with opposing vertically oriented first and second tracks laterally spaced apart by a connecting member extending between the tracks and substantially continuously along the length of the tracks The apparatus is attached to a structure by a support member, such as an overhead or lower support member, with the support member being attached to an upper or lower surface of the connecting member respectively. Each anchorage is adapted to be independently moveable along the length of one of the tracks, with the tracks being sufficiently spaced apart to permit the anchorages to freely pass by each other and the attachment point.

Abstract: A safety ladder assembly and a safety extension used in combination with a ladder suitable to permit safe and easy access to the landing areas, working platforms, scaffolds, etc. The assembly includes safety extension members having a plurality of horizontal handgrips ergonomically designed to prevent falls from the ladder when a user is ascending upward or descending downward.

Abstract: A mechanism for facilitating the storage of ladders in the upper area on the outside of an emergency vehicle which includes the capability of moving of the ladder to a lower deployed position to facilitate immediate access thereto by emergency workers such as firemen and the like. The construction includes an inner housing attached to the vehicle and an outer housing movable by an arm assembly relative thereto to urge the ladder between the storage and deployed positions. An adjustment mechanism including a yoke is included for varying the position of the powering drive cylinder which operatively moves the outer housing relative to the inner housing.