Abstract: A tower lift includes a main frame extending in a vertical direction, a carriage module configured to be movable in the vertical direction along the main frame, a weight module disposed behind the carriage module and configured to be movable in the vertical direction along the main frame, a driving module disposed on the main frame and configured to move the carriage module and the weight module in the vertical direction using at least one timing belt, an auto tensioner disposed on a lower portion of the main frame and connected with the carriage module and the weight module by a balance belt, and an upper alignment unit for aligning a horizontal position of the at least one timing belt.

Abstract: A hydraulic tensioning device, comprising a tensioning piston receptacle, a tension piston that includes a piston compartment and is movably guided in the tensioning piston receptacle, a high-pressure chamber that can be connected to an inlet connection using an inlet passage secured by a non-return valve, a low-pressure chamber between the inlet connection and the inlet passage, and a balance piston located in the low-pressure chamber.

Abstract: Cover (25) is mounted on wall surface (12) on the front side of cylinder block (10). Sub gallery (26) through which engine oil flows is formed between cover (25) and wall surface (12). Chain tensioner (17) is mounted on cover (25), and the engine oil in sub gallery (26) is supplied to chain tensioner (17) through oil supply port (31) formed through cover (25).

Abstract: The invention relates to a belt run control device of an endless belt (2) revolving over at least one cylindrical roller (1), wherein the rollers (1) are each designed as deflection rollers around which the belt (2) is wrapped, and wherein for the purpose of tensioning the belt (2) at least one cylindrical roller (1) is preloaded on both sides by way of elastic elements (3) designed to be equally acting in order to center the belt (2) relative to the roller (1), and wherein a position measuring device is provided in the region of the belt (2), wherein an adjusting element (5) that can be actuated using a pneumatic piston-cylinder unit (4) is disposed on at least one side of the roller (1), characterized in that the adjusting element (5) is designed to apply a force that acts additively or subtractively with respect to the preloading force of at least one of the elastic elements (3).

Abstract: In one aspect, a tensioner that incorporates a fluid actuated cylinder and that is capable of precognitively anticipating when it is desirable to increase the tension in a belt or other endless drive element so as to prevent belt slip prior to events that would raise the risk of it.

Abstract: A hydraulic control system for a vehicular drive system including a hydraulically operated belt-and-pulley type continuously variable transmission and a hydraulically operated frictional coupling device engaged for running of a vehicle, the hydraulic control system including: a first solenoid valve for regulating a belt-tensioning hydraulic pressure for tensioning a belt of the transmission, a second solenoid valve for regulating a transient coupling hydraulic pressure to be applied to the frictional coupling device in the process of an engaging action, a line-pressure regulating valve for regulating a line pressure used for hydraulically operated devices of the mechanism, and a hydraulic-circuit switching device operable to apply a control pressure of the second solenoid-operated valve to the line-pressure regulating valve after the frictional coupling device has been placed in a fully engaged state, and to apply a first control pressure of the first solenoid-operated valve to the line-pressure regulating va

Abstract: An apparatus for tensioning a chain is provided that compensates for the affect of temperature on oil viscosity by providing, in addition to a continuously open oil leakage path, an additional leakage path open only at lower temperatures when oil is more viscous and leaks at a slower rate. Thus, overall oil leakage at lower temperatures is similar to that at higher temperatures, when the additional leakage path is closed, and the less viscous higher temperature oil leaks at a faster rate from the continuously open oil leakage path. Accordingly, the affect of temperature on hydraulic stiffness of the tensioner assembly is minimized.

Abstract: A hydraulic tensioning system (10) for an endless drive (1) of an internal combustion engine (2). In an operating mode, the piston (9) of the tensioning system (10), which is supplied with a hydraulic fluid, is supported against a tensioning rail (6) with a non-positive fit, with the rail pre-tensioning the traction drive element (4). If the hydraulic fluid in the tensioning system (10) is not sufficient, the tensioning rail (6) is supported on an elastic end stop (13a) of the system (10).

Abstract: An apparatus for tensioning a chain is provided that compensates for the affect of temperature on oil viscosity by providing, in addition to a continuously open oil leakage path, an additional leakage path open only at lower temperatures when oil is more viscous and leaks at a slower rate. Thus, overall oil leakage at lower temperatures is similar to that at higher temperatures, when the additional leakage path is closed, and the less viscous higher temperature oil leaks at a faster rate from the continuously open oil leakage path. Accordingly, the affect of temperature on hydraulic stiffness of the tensioner assembly is minimized.

Abstract: A chain drive tensioner system with translating pivot point is disclosed. The chain drive tensioner system with translating pivot point includes a chain drive tensioner assembly and a tensioner arm in operable communication with a chain. The chain drive tensioner assembly is in operable communication with the tensioner arm, and the tensioner assembly is moveable between a first tensioner position and a second tensioner position. The tensioner arm includes an internal gear and an external gear rotatably mounted within the internal gear, such that movement of the tensioner assembly from the first tensioner position to the second tensioner position along with concurrent rotation of the external gear within the internal gear is operable to move the tensioner arm laterally from a first position to a second position.

Abstract: An pneumatic tensioner apparatus is disclosed, the apparatus including: a main drive belt; a chuck assembly, suspended from the main drive belt, having a spinning member and a drive contact portion; a first frictional drive belt in a first track, the first frictional drive belt in contact with the drive contact portion operative to spin the chuck assembly; and a first tension adjusting device having at least one pneumatic tension adjustment member operative to apply pressure to the first frictional drive belt tangentially to the drive contact portion.

Abstract: The invention provides for a guide system (10) for tensioning a belt. The guide system (10) comprises an endless belt (12); at least two guides (14, 16) for guiding the belt (12); and tensioning means (18) for tensioning the belt (12) between the guides (14, 16), the tensioning means (18) being movable between a tensioned and a substantially non-tensioned position such that in the tensioned position it is biased to the non-tensioned position to compensate for a loss in belt tension. The guide system (10) also comprises self-adjusting regulating means that is operatively associated with the tensioning means (18) and that is adapted for moving the tensioning means (18) towards its tensioned position upon occurrence of belt slacking for effecting substantially immediate tensioning of the belt (12) while the belt (12) is running and without the necessity of manual intervention.

Abstract: A traveling screen system has a traveling screen guided about a multiplicity of support and guide rollers. A scanning device scans a transverse position of the traveling screen and an adjusting device adjusts the angular orientation of at least one of the support and guide rollers. The adjusting device is supported on one side on a displaceable bearing block which is supported on a carriage. Between the control device for the bearing block of the displaceable roller and the scanning device, a coupling is provided by which a return of the control motion of the roller to the scanning device is effected. The coupling is formed by a Bowden cable, by a hydraulic circuit with control cylinders, or by an electric circuit with control devices.

Abstract: A gas actuating device includes a housing having a gas applying chamber, an actuator chamber and a gas applying passage for communicating gas from the gas applying chamber to the actuator chamber. An actuating member having a first side and a second side is disposed in the actuator chamber, wherein the first side of the actuating member receives gas pressure from gas applied to the actuating chamber from the gas applying passage. The actuating member moves in a first direction in response to the gas pressure applied to the first side of the actuating member. A valve selectively communicates compressed gas from the gas applying chamber to the actuator chamber through the gas applying passage for moving the actuating member in the first direction, and a gas release passage communicates gas from the actuator chamber at the first side of the actuating member to an outside of the actuator chamber.

Abstract: A gas actuated derailleur for a bicycle includes a base member, a movable member supporting a chain guide, a coupling mechanism coupling the base member to the movable member so that the movable member moves relative to the base member, and an actuation mechanism responsive to compressed gas for causing the movable member to move relative to the base member.

Abstract: A family of new bicycle shifting systems incorporate improved derailleur designs that are controlled by sealed hydraulic actuators. The shifting systems (i) a hydraulically-actuated, manually-powered front and rear derailleur shifting system, (ii) a hydraulically-actuated, power-assisted front and rear derailleur shifting system with manual control, and (iii) a hydraulically-actuated, power-assisted front and rear derailleur shifting system in which the shifting sequence for the rear derailleur is controlled automatically by pedal speed. Each of these shifting systems utilize a totally sealed, inclined linear shifting path. Environmental contaminants are prevented from entering any of the critical derailleur or control elements. The linear, inclined shifting path provides precise chain shifting, more uniform chain wrap on the rear bicycle drive sprockets, and lower chain and sprocket wear. Several different shifting control units are disclosed.

Abstract: The invention is directed to a guide connectable to a paper roll in a paper machine for moving an end of the roll in a direction transverse to a longitudinal axis of the roll. The guide includes a roll mounting frame connectable to the roll, a support frame, and at least one elongate member interconnecting the support frame with the roll mounting frame. The at least one elongate member is elastically deformable in the transverse direction and thereby allows movement of the roll mounting frame relative to the support frame in the transverse direction. A positioning device is engaged with the roll mounting frame for moving the roll mounting frame in the transverse direction and maintaining the roll mounting frame in one of a plurality of positions relative to the support frame.

Abstract: A compact rope stretcher maintains the tension in an endless rope used for threading a web in a papermaking machine and includes an elongated H-beam having a flange engaged by guide wheels supporting a pair of separate carriages. The carriages support corresponding rope sheaves for free rotation, and a pair of fluid cylinders are mounted on opposite sides of the beam web and have piston rods connected directly to the corresponding carriages by laterally floating links. Proximity sensors are mounted on opposite end portions of the H-beam for indicating when the rope stretch is reaching a limit, and the beam supports a full length cover which encloses and protects the carriages and cylinders.

Abstract: A compact rope stretcher maintains the tension in an endless rope used for threading a web in a papermaking machine and includes a beam having a flange forming a track which is engaged by guide wheels supporting a pair of separate carriages. The carriages support corresponding rope sheaves for free rotation, and a pair of fluid cylinders are mounted on the beam and enclose pistons connected by corresponding piston rods directly to the corresponding carriages. The beam may be mounted on the papermaking machine with its track-forming flange extending at an angle to the horizontal so that the respective piston rods extend upwardly and downwardly from the cylinders. Pressurized fluid is supplied to the upper end of the one cylinder having the downwardly extending piston rod, and the upper end of the other cylinder is vented to atmosphere. The lower ends of the two cylinders are interconnected by a fluid passage to form a closed circuit which is filled with hydraulic fluid.

Abstract: A compact rope stretcher maintains the tension in an endless rope used for threading a web in a papermaking machine and includes a beam having parallel flanges forming tracks which are engaged by guide wheels supporting separate carriages. The carriages support corresponding rope sheaves for free rotation, and a pair of fluid cylinders are mounted on the beam and have piston rods connected directly to the corresponding carriages. The rope sheave on each carriage has at least two peripheral grooves to receive a double loop of the rope, and the frame supports a corresponding multiple groove sheave for each of the carriage sheaves and for also receiving a double loop of the rope.

Abstract: A motorcycle engine having an exhaust passage air introduction system. Each cylinder includes two exhaust passages which are joined at a point displaced from the engine. Air is introduced into one of the exhaust passages of the two so as to more fully combust the unburned gasses within the exhaust passage and then to more fully combust the unburned exhaust in the joined passage. The timing of the valves associated with each exhaust passage is such that the valve associated with the passage having the air inlet has advance timing. A chain tensioner for the timing chain includes a tensioner cylinder hydraulically actuated by the engine oil. A gasket having an orifice therein is positioned between components in the oil passageway extending to the tensioner cylinder. The oil cooling system of the engine includes an oil filter and an oil cooler which are displaced from one another and mounted to a common base which is in turn mounted to the engine.

Abstract: A compact rope stretcher maintains the tension in an endless rope used for threading a web in a papermaking machine and includes an elongated H-beam having a flange engaged by guide wheels supporting a pair of separate carriages. The carriages support corresponding rope sheaves for free rotation, and a pair of fluid cylinders are mounted on opposite sides of the beam web and have piston rods connected directly to the corresponding carriages by laterally floating links. Proximity sensors are mounted on opposite end portions of the H-beam for indicating when the rope stretch is reaching a limit, and the beam supports a full length cover which encloses and protects the carriages and cylinders.

Abstract: The present invention relates to a conveyor belt alignment system by which a pair of alignment rollers are mounted on a carrier frame about a pivot axis that is situated at the approximate transverse center between opposed longitudinal side edges of a conveyor belt. The alignment rollers are spaced longitudinally to accept and form a portion of the conveyor belt into a substantial "s" configuration. The centrally pivoted carrier frame and alignment rollers are pivoted by a pair of bladders 50, 51. Inflation of the bladders is controlled through a sensor 54 provided to detect the transverse position of an adjacent belt edge. If the belt edge shifts in one direction, the sensor detects such motion and operates the drive to selectively inflate one or the other of the air bladders to correspondingly shift the belt aligning rollers.

Abstract: A fluid tensioner for use with power transmission chains such as automotive camshaft drive chains users engine lubricating oil as its operating fluid, and includes a built-in oil filter for removing foreign matter which might interfere with proper tensioner operation. The tensioner is attached directly to the outside wall of an engine block and, in one version the filter is disposed in an elongated recess formed in the portion of the tensioner housing which engages the engine block, and engine oil is received through an oil port in the block. The filter screen is tilted to maximize the distance between the oil port and the screen and between the screen and the channel in the tensioner through which oil flows to the tensioner mechanism. In another version, the tensioner has a built-in oil reservoir, and the filter is located either upstream or downstream from the reservoir and insertable through a passage leading to the outside of the tensioner housing for easy inspection and replacement.

Abstract: In a fluid tensioner for a camshaft drive belt, a piston rod is sealed by a flexible diaphragm having an enlarged inner end clamped in a conforming groove in the piston rod by a spring clamp. This maintains the inner end of the diaphragm at a fixed position on the piston rod, and provides a labyrinthine seal preventing leakage of fluid. A flattened portion of the piston rod fits a D-shaped opening in a cap to prevent rotation of the piston rod and premature failure of the seal. A dust seal located on the cap also has a D-shaped hole, aligned with the D-shaped hole in the cap, and conforming to the flattened part of the piston rod.

Abstract: In the case of a tangential belt drive for spinning or twisting machines having several rotating elements driven by a common tangential belt and having belt guiding members, which can be adjusted for correcting the moving direction of the tangential belt, it is provided that, along the tangential belt, several sensors are arranged which sense deviations from a given moving direction, and in the control elements are assigned to at least some of the belt guiding members, these control elements being controlled by an analyzing device which processes the signals of the sensors.

Abstract: The invention relates to an apparatus for controlling the passage of a moving band (1) or the like in a paper machine or the like. The apparatus comprises a roll (2) mounted at one end turnably with respect to a machine body (3) while the other end is mounted turnably to an adjusting device (6). The adjusting device comprises a turning arm (9) for a roll (2) and an auxiliary arm (10) which are mounted coaxially turnably. The apparatus further comprises one or more air bellows (13) connected between the turning arm (9) and the auxiliary arm (10). Furthermore, at least one liquid bellows (11) is provided between the auxiliary arm (10) and the body or a body part (7). The position of the auxiliary arm (10) with respect to the body is adjusted by varying the amount of liquid in the liquid bellows. By varying the volume of the bellows, the roll (2) is turned about a shaft (8) and the direction of the roll shaft with respect to the longitudinal direction of the band (1) in its transverse direction. (FIG. 2).

Abstract: A tensioner acting on and allowing an endless transmission belt, stretched between a driving wheel and driven wheels supported on the body of an internal combustion engine, to run under a constant tension, wherein an oscillating lever supports a tension pulley pressed against a loosening side of the transmission belt and has a base end pivoted on the engine body, and an automatic adjuster connected to a tip end of the lever is supported on a case for a hydraulic pump of the engine. A spacer is interposed between contact portions of the oscillating lever and the engine body, and an outlet of the pump and an oil port of the adjuster are directly communicated. An adjusting screw is provided on the tip end of the oscillating lever and is operatively connected to the upper end of a plunger of the automatic adjuster.

Abstract: A tensioner device for applying a predetermined tension force to a transmission belt extended between a driving wheel and a driven wheel supported on the body of an internal combustion engine, including a hydraulic automatic adjuster which comprises a plunger case fitted in a cylinder bore through a seal member and a plunger slidably and axially movably fitted in the plunger case, open edges of the plunger case and plunger being sealed from outside by means of a flexible boot. An extra feed oil chamber formed within the plunger is in communication with a feed oil source by means of a closed oil path through a feed oil port and in communication with an oil reservoir by means of another closed oil path through an oil discharge port provided in a spaced relation from the feed oil port.

Abstract: The invention relates to a method and apparatus for maintaining relative positional alignment between two spaced-apart points on a moveable member, such as a rotating axle on which is mounted a conveyor belt pulley. The invention comprises a hydraulic pump (80) which is operatively communicated to first and second hydraulic cylinders (21and 30, respectively). The first hydraulic cylinder (21) applies a reference hydraulic pressure to a first point (13) on the axle (11) and moves the axle (11) to maintain the pressure at a constant, pre-determined pressure level. The second hydraulic cylinder (30) is operatively connected to a second point (12) on the axle (11) spaced apart from the first point (13). A fork (77) and pin (42) mechanism senses relative movement between the first point (13) and the second point (12) on the axle (11).