Abstract: An actuation unit includes an actuating arm pivotable between an open and closed position; a pneumatic cylinder comprising a stem movable linearly along a cylinder axis and configured to control pivoting of the actuating arm; and a closing device that includes a braking unit configured to brake movement of the actuating arm having a surface portion configured to come into contact with at least one braking assembly. The braking assembly is locked against rotation and axially movable between a non-braking and braking configuration. The surface portion is in a non-orthogonal arrangement with respect to the cylinder axis and the braking assembly includes a plurality of rollers retained in the braking assembly with clearance at least with respect to a radial movement thereof, the rollers being able to assume a first radial configuration not in contact with the surface portion and a second radial configuration in contact with the surface portion.

Abstract: A conversion kit creates a redundant hydraulic, pneumatic, or mechanical control functionality for low-torque, quarter-turn plug valves in remote production environments (i.e., rural or subsea pipelines). The conversion kit comprises at least one custom end cap fitted to the valve and comprising a socket receiving a rotator attachment. Each rotator attachment is in turn connected to a crossover which connects to a bracket remotely actuated via hydraulic, pneumatic, or mechanical control. The linear movement of the bracket and the attached crossover[s] is converted to rotational force which is transmitted through the rotator attachments to the at least one valve.

Abstract: A sensor system for a volumetric pump operating according to the linear peristalsis principle includes at least one sensor unit; at least one sensor transmitter unit; and a sensor output signal processing unit. The sensor transmitter unit is arranged to apply a detection variable varying as a function of a travel position to the sensor unit along a predetermined travel along which a fixedly arranged sensor unit and a movably arranged sensor transmitter unit or a movably arranged sensor unit and a fixedly arranged sensor transmitter unit are moving relative to each other. The sensor unit is configured to output a detection signal corresponding to a travel position on the basis of the varying detection variable. The sensor output signal processing unit is arranged to receive the detection signal output by the sensor unit and discriminate at least three travel positions on the basis of the received detection signal.

Abstract: A starboard wing of an aircraft includes various movable aerodynamic surfaces, such as a spoiler, slat, aileron, flap or the like. An actuator is provided for moving each such surface. The location and mounting of the actuator of the starboard wing is symmetrical about the centreline of the aircraft to that of the actuator of the port wing. The location of the piston, arm or other mechanical output of the actuator is at a centre portion of the actuator (i.e. at or near the midline of the actuator. The input port(s) for power is/are also at the centre portion. The actuator for the starboard wing may thus be substantially identical to the actuator for the port wing.

Abstract: A height-adjusting device for a gripping and transporting mechanism for containers having a lifting cylinder comprises a cylinder base, a cylinder tube, a piston arranged sealingly slidable in the cylinder tube, a cylinder cover, and at least one first piston rod connected to the piston. The first piston rod is guided out of the cylinder tube through the cylinder cover in a sealing sliding manner by its end opposite from the piston, is arranged in the cylinder tube, and has at least one first and/or second fluid path. The first fluid path is pressurized by a pressurized fluid at the end of the first piston rod opposite from the piston, the first piston rod passes through the piston and communicates with a first cylinder interior at the cylinder base-side of the piston and/or the second fluid path communicates with a second cylinder interior at the cylinder cover-side of the piston.

Abstract: In some aspects, reciprocating engines can include a first reciprocating mechanism that includes an axially translating y-axis component configured to reciprocate substantially along a y-axis with a reciprocating motion of a piston assembly relative to a base to which the y-axis component is slidingly attached. The first reciprocating mechanism can include an x-axis component slidingly coupled to and translating with the y-axis component along the y-axis, the x-axis component being: i) configured to reciprocate substantially perpendicularly to the y-axis relative to the y-axis component, ii) comprising an orbital output component, and iii) comprising an orbital linking component disposed substantially concentric with the orbital output component. The first reciprocating mechanism can include a stationary output component and a stationary linking component that are substantially concentric and disposed in a direction that is substantially perpendicular to the x-y plane.

Abstract: In some aspects, reciprocating engines can include a drive mechanism for generating a rotational motion output from reciprocating piston assembly, where the drive mechanism includes an axially translating y-axis component to reciprocate along a y-axis with the piston assembly; an x-axis component: i) configured to reciprocate substantially perpendicularly to the y-axis, ii) having an internal ring gear, and iii) having an orbital engagement component substantially concentric with the internal ring gear; an output shaft assembly having an output pinion gear engaging tangentially with the internal ring gear; and a stationary engagement component substantially concentric with the output shaft assembly, the stationary engagement component interfacing with the orbital engagement component, the interfacing between the stationary engagement component and the orbital engagement component applying a force to the x-axis component to maintain contact between the internal ring gear and the output pinion gear.

Abstract: Various embodiments of a hydraulic cylinder assembly, cylinder liner member and a hydraulic manifold for use with the hydraulic cylinder assembly reduce the need for external plumbing from the rear of the hydraulic cylinder assembly to the front of the hydraulic cylinder assembly. The cylinder liner member may include three bores that convey fluid from the manifold from the rear of the hydraulic cylinder assembly to the front of the assembly, conveying fluid to the retract volume of the cylinder.

Abstract: In some aspects, reciprocating engines can include a drive mechanism for generating a rotational motion output from reciprocating piston assembly, where the drive mechanism includes an axially translating y-axis component to reciprocate along a y-axis with the piston assembly; an x-axis component: i) configured to reciprocate substantially perpendicularly to the y-axis, ii) having an internal ring gear, and iii) having an orbital engagement component substantially concentric with the internal ring gear; an output shaft assembly having an output pinion gear engaging tangentially with the internal ring gear; and a stationary engagement component substantially concentric with the output shaft assembly, the stationary engagement component interfacing with the orbital engagement component, the interfacing between the stationary engagement component and the orbital engagement component applying a force to the x-axis component to maintain contact between the internal ring gear and the output pinion gear.

Abstract: The present invention provides a small brake cylinder device that can increase braking force output from a brake output portion that moves along with a rod, while suppressing an increase in the device size. A piston defines a pressure chamber and surrounds the axis of the rod inside a cylinder body, and moves in a linear direction that is parallel to the movement direction of the rod. When pressure fluid is supplied to the pressure chamber, the piston moves in the backward movement direction relative to the cylinder body in resistance to biasing force from a rod biasing spring. Swinging members of a force amplifying mechanism swing due to being biased by the piston moving in the backward movement direction, and moves the rod by biasing it in the forward movement direction. The force amplifying mechanism amplifies the drive force generated by the piston and applies it to the rod.

Abstract: A compact force multiplying actuator 10 and its associated valve 20 are disclosed. The actuator 10 and valve 20 include piston heads 31 and 32 and force multiplying load beams 52 and 53. Belleville springs 81 and 82 are disposed axially between the piston heads 31, 32 and the load beams 52, 53. The Belleville springs 81 and 82 act through an output member 71 to retain a valve member 88 in a closed position. When pneumatic pressure is applied against the piston heads 31 and 32, movement of the piston heads 31 and 32 is transferred through a force transfer member 45 and through the force multiplying load beams 52 and 53 to move the output member 71 against the bias of the Belleville springs 81 and 82 to allow the valve member 88 to open.

Abstract: A device for actuating a flap, in particular a wastegate flap in an exhaust gas turbocharger for an internal combustion engine, includes a control rod, which can be moved by an actuator substantially in an axial direction and is guided in a fist gate via a first pin at the side thereof facing away from the actuator. A carriage is articulated on the first pin and is guided in the first gate via a second pin on the side facing away from the first pin, wherein a pivot lever is articulated on the second pin and, on the side facing away from the second pin, the pivot lever is rotatably mounted in a machine housing, preferably a turbine housing, and the flap is arranged on the pivot lever on the side facing away from the second pin. By way of the articulated design, a non-linear adjustment of the flap is possible.

Abstract: Apparatus for drainage by well points, including a piston pump and a drive motor coupled to the piston pump by means of a transmission and provided with a drive shaft, which transmission is received in a housing and includes at least one crankshaft and a drive rod coupled thereto, the drive rod is coupled by means of a cross-head to a piston rod of the piston pump and the housing forms an oil sump and the transmission further includes an assembly of a worm and a worm wheel co-acting therewith and mounted on the crankshaft and the worm is provided on a worm shaft extending transversely relative to the crankshaft and vertically in operating mode of the apparatus for drainage by well points.

Abstract: An oil-free compressor for a rail vehicle includes a multi-piece compressor housing, a first piston cylinder supported in a first opening in the compressor housing, a second piston cylinder supported in a second opening in the compressor housing, a multi-piece crankshaft assembly supported by the compressor housing, and an optionally filtering air plenum in fluid communication with the compressor housing interior to provide a volume of air to the compressor housing interior. The crankshaft assembly is linked to pistons of the first and second piston cylinders by respective connecting rods. The connecting rods connect to a wrist pin associated with each of the pistons, and the wrist pins are respectively supported by a dry lubricant bushing to the associated piston. The compressor housing may have a first housing portion and a second housing portion forming respective halves of the compressor housing.

Abstract: In the rotary type cylinder device, a first crank shaft is revolved around a shaft and a composite piston assembly is revolved around the first crank shaft in a state where first rotational mass balance relating to first and second piston units around second virtual crank shafts, second rotational mass balance relating to the composite piston assembly around the first crank shaft and third rotational mass balance relating to the first crank shaft and the composite piston assembly around the shaft are uniformly produced by only first and second balance weights which are attached to end parts of the first crank shaft. Therefore, first and second piston units, which are attached to the second cylindrical sections, are linearly reciprocally moved in radial directions of a circular orbit of second virtual crank shafts, which has radius of 2 r, with relatively revolving around the shaft.

Abstract: A fluid pump system for a fluid delivery system is disclosed. The fluid pump system includes a drive cylinder and a drive piston slidably disposed in the drive cylinder. A drive rod including a crowned end is connected to the drive piston. The fluid system further includes a pump cylinder and a pump piston slidably disposed in the pump cylinder. A pump rod including a crowned end is connected to the pump piston. The drive rod and the pump rod are configured to be detachably coupled to each other, wherein the crowned end of the drive rod cooperates with the crowned end of the pump rod.

Abstract: A system, in certain embodiments, includes a barrier with magnetic coupling between opposite sides of the barrier. For example, the system may include a first member with a first magnet that translates along with the first member, and a second member having a second magnet that translates along with the second member. The system also may include the barrier completely isolating the first member from the second member, wherein the first magnet magnetically couples with the second magnet through the barrier to impart translational motion from the first member to the second member.

Abstract: The reciprocating piston mechanism with an extended piston offset is provided. The mechanism is of the type that contains at least one cylinder having a longitudinal axis, at least one piston that has a pivot pin and is slidingly installed in the cylinder, a main driveshaft having a central axis, which is offset at a distance from the longitudinal axis of the cylinder, a circular cylindrical body, e.g., a circular eccentric, which is non-rotationally secured on the main drive shaft and a rocker arm. The rocker arm is pivotally mounted on the circular eccentric. The mechanism is also provided with a connecting rod that connects the cylinder to one arm of the rocker arm/lever. The other arm of the rocker arm/lever has a roller that is guided in a confined pathway and works as a fulcrum of the lever and a stabilizer/rudder at the same time.

Abstract: A reciprocating compressor is provided. In one embodiment, a reciprocating compressor frame includes a central body and at least two crosshead guides extending from opposite sides of the central body. Additionally, the compressor frame crosshead guide support structures extending outwardly from the central body along a respective crosshead guide. Other embodiments of compression systems, devices, and frames of such systems are also provided.

Abstract: An actuator for a fluid-filled lens including a housing having a first and second end; a reservoir disposed within the housing is disclosed. In an embodiment, the actuator further includes a compression arm having a first end that is fixed at a pivot and a second end that is not fixed such that the compression arm flexes to compress the reservoir.

Abstract: A piston arrangement comprising a piston movable within a cylinder and having a stroke with a first end and a second end, wherein the piston is coupled to a crankshaft by a linkage mechanism including a toggle link which is pivotally coupled to the piston and pivotally coupled to a con-rod, wherein the toggle link has a first position corresponding to the first end of the piston stroke, a second position different to the first position also corresponding to the first end of the piston stroke, and an intermediate position between the first and second positions corresponding to the second end of the piston stroke such that the piston completes four strokes for every one revolution of the crankshaft.

Abstract: Disclosed are an anti-abrasion device and a reciprocating compressor having the same, whereby a sleeve is fabricated with an outer diameter smaller than an inner diameter of a connecting rod to be non-press-fitted, thereby facilitating an assembly of the sleeve, and also the deformation of an inner diameter of the sleeve is prevented during the assembly of the sleeve, thereby preventing beforehand an increase in an input load of a motor unit due to the deformation of the sleeve and an abrasion of a pin of a crankshaft.

Abstract: The invention relates to mechanical engineering, in particular to piston machines and mechanisms for converting the movement of the pistons thereof into shaft rotation. The technical result of the invention involves increasing the operational reliability, extending the service life, improving the specific mass and dimensional characteristics and enhancing the effectiveness of a machine. The essence of the invention is that the piston and the crank of a piston machine are interconnected by means of a hinged joint with at least a flat hinge which enables the piston to self-center along the surface of a cylinder owing to the movement of the piston with respect to the crank in any direction on a plane that intersects the longitudinal axis of the cylinder. The surfaces of the crank that take up reactive torque are constricted by rollers with synchronized toothed wheels.

Abstract: The invention provides a crank circular slider mechanism comprising multi-row reciprocating motion part and one-row reciprocating part: the multi-row reciprocating motion part has a guiding part which is divided by a longitudinal groove into two rows parallel to each other, respectively named by the first row of guiding section on which is provided a first hole receiving the circular slider; and the second row of guiding section on which is provided a second hole receiving the second circular slider, the one-row reciprocating motion part has a guiding part which can be inserted into the longitudinal groove of the multi-row reciprocating motion part along the thickness direction, so as to transverse vertically the multi-row reciprocating motion part, the guiding part is provided thereon with a hole receiving the middle circular slider, the first circular slider and the second circular slider are mounted in the same phase, the middle circular slider is sandwiched between the first circular slider and the second

Abstract: An apparatus comprising a crank-slider linkage and a rocker link. The crank-slider linkage has a crank coupled to the slider by a jointed connecting rod. The jointed connecting rod has a first link and a second link. The first link is coupled to the second link by a first revolute joint. The first link is coupled to the crank and has a longitudinal axis. The rocker link has a rocker end and a ground end. The rocker end is coupled to the jointed connecting rod. The ground end is coupled to ground by a second revolute joint. The rocker link and the second link are disposed on a common side of the longitudinal axis.

Abstract: The invention consists of a gas spring which can absorb movements perpendicular to its operating axis. To do that, it has a hollow cylindrical body (1) with an open end, a piston rod (2) located in the hollow cylindrical body (1) which can be moved therein and a sliding element (3) connected to the free end of the piston rod (2) and laterally displaceable with respect thereto. It also has a connection means (4) between the sliding element (3) and the piston rod (2) which comprises an internal part which is located inside the piston rod (2) and an external part (5) which projects out of the free end of the piston rod (2), the sliding element (3) being situated on the free end of the piston rod (2) and the sliding element (3) and the connection means (4) being configured so that the sliding element (3) is laterally displaceable with respect to the external part (5) of the connection means (4).

Abstract: In the joint mechanism, when connecting a plunger to a piston, after engaging members of a plunger-side engaging region in a retracted state pass through a first engaging wall region of a piston-side engaging region, the engaging members of the plunger-side engaging region come into a projected state in a second engaging wall region and the projected state of the engaging members is fastened by a fast block, and thereby, the plunger-side engaging region engages with the piston-side engaging region.

Abstract: A device is described for receiving and dispensing hydraulic fluid, in particular for a hybrid or electric vehicle, having a cylinder, a piston, which is movable in the cylinder for receiving and dispensing hydraulic fluid, and a drive unit; a ramp mechanism being provided, having at least one ramp on which at least one rolling element rolls for moving the piston, the ramp mechanism being situated between a face of the piston and a face of a gearwheel driven by the drive unit.

Abstract: The present invention has an object to provide an engine and a pump useful in three-stroke/six-stroke rocket/jet engine pump and the like in each of a speed volume type and an isokinetic circular rotation internal combustion engine type which operates only by isokinetic circular rotation similarly to a jet engine, has no pressure leakage, has all the increased/decreased pressures immediately work as a rotation torque and is excellent in super-high speed and super-low speed limitation performance, silence and fuel-cost saving performances.

Abstract: The invention relates to a method of calibrating a connecting rod arrangement comprising a crankshaft eye and a connecting rod eye. In order to achieve the best possible parallelism between the connecting rod eye and the crankshaft eye a controlled energy input occurs in at least one predefined surface area of the connecting rod, so that outside a neutral axis a local structural change and thus a tension in the connecting rod occurs.

Abstract: Cylinder unit of a high pressure pump for a fluid. Cylinder unit includes a cylinder formed by at least two concentric tubular components coupled by a shrink connection. A flange part with sealing system is detachably connected on one side of the cylinder, and sealing system has a movable plunger and a bearing bushing. A valve body is connected on other side of the cylinder. Bearing bushing and radially outermost component are arranged to bear against flange part to form an intermediate gap, a spring device has a distal portion supported on outermost component of the cylinder and a proximal portion on an outside of bearing bushing, and a valve body against which an other side of the cylinder bears are included. The tubular components have a metallic connection in a region of a surface bearing between the valve body and the cylinder.

Abstract: A method and apparatus for maintaining a seal between a cylinder and a fluid manifold for a reciprocating force delivery device is disclosed. A cylinder retention assembly comprises a rotatable member with a variable topography surface. The rotatable member is disposed against a stop extending outwardly from the cylinder, and is fastened to the fluid manifold by a locking ring. When rotated, the rotatable member produces an axial force on the locking ring and the cylinder, urging the cylinder against the fluid manifold. The cylinder retention assembly may be used in reciprocating pumps and compressors.

Abstract: A dosing unit for an ambulatory infusion device and a method of operation are disclosed. The dosing unit includes a stationary member, a movable member, and a plunger. The movable member and the stationary member, together, make a charging valve and a discharging valve. The plunger is located, at least in part, in a metering cavity of the movable member and the movable member is adapted to selectively couple and decouple a driving unit, such that, by operating the driving unit with the movable member being coupled with the driving unit, the movable member moves with the plunger to maintain a position of the plunger relative to the movable member along a displacement axis, and by operating the driving unit with the movable member being decoupled from the driving unit, the plunger is displaced while the position of the movable member is maintained.

Abstract: A dosing unit for an ambulatory infusion device and a method of operation are disclosed. The dosing unit includes a stationary member, a movable member, and a plunger. The movable member and the stationary member, together, make a charging valve and a discharging valve. The plunger is located, at least in part, in a metering cavity of the movable member and the movable member is adapted to selectively couple and decouple a driving unit, such that, by operating the driving unit with the movable member being coupled with the driving unit, the movable member moves with the plunger to maintain a position of the plunger relative to the movable member along a displacement axis, and by operating the driving unit with the movable member being decoupled from the driving unit, the plunger is displaced while the position of the movable member is maintained.

Abstract: A system for moving fluids includes a pump device having a housing and at least one piston movable in the housing to displace fluids thereby causing flow. An actuator device is connected to the at least one piston for moving the piston within the housing to displace fluids as the actuator device is moved. The actuator device includes a plurality of side portions connected to one another to form a vacuum therein and movable relative to one another as the actuator device moves reciprocally between first and second positions with one of the side portions being connected to at least one piston thereby moving the at least one piston within the housing.

Abstract: A miniature pump device, with a fluid reservoir that can contain an intravenous drug, hydraulic fluid, or the like. The miniature pump has a motor disposed adjacent the fluid reservoir, and a piston disposed within the fluid reservoir. A power transfer linkage transfers power from the motor to the piston in the fluid reservoir, and a stationary flexible seal is coupled between the fluid reservoir and the power transfer linkage to seal a portion of the power transfer linkage within the fluid reservoir.

Abstract: A pump assembly comprises a cam and a piston. The cam rotates in a plane about an eccentric axis, and has a circumferential side wall. The piston engages the circumferential side wall of the cam, and runs along a piston axis which lies in the plane of the cam. The piston axis is parallel to but not coincident with a reference line perpendicular to and intersecting the eccentric axis.

Abstract: A pump assembly comprises a base, a cam, a cylinder, a piston, and a shim clip. The cam rotates about a rotational axis with respect to the base. The cylinder attaches to the base, and has an inlet port and an outlet for fluid. The piston is reciprocally driven by rotation of the cam to draw fluid into the cylinder through the inlet port during a fill stroke, and to close the inlet port and pump fluid in the cylinder toward the offset during a pump stroke. The shim clip is removably insertable between the cylinder and the base to increase the distance between the inlet port and the rotational axis.

Abstract: A fluid is supplied and discharged to and from a cylinder. A body portion is fixed to a fixed-side structure, and the cylinder is provided integrally with the body portion. A piston defines a cylinder chamber inside the cylinder and slides on an inner wall of the cylinder. A rod is provided integrally with the piston and is displaced so as to extend from and contract into the cylinder. A link member is installed parallel to the axial direction of the cylinder or installed so as to extend obliquely to a direction parallel to the axial direction of the cylinder, and a first end of the link member is pivotably connected to a movable-side structure. A connecting member is fixed to the rod, and a second end of the link member is pivotably connected to the connecting member.

Abstract: A reciprocating pump assembly has a pump within a housing. The pump has a crankshaft that rotates and a crosshead that is connected to a plunger via a pony rod. The plunger pumps fluid through cylinders in the pump. A connecting rod connects at one end to the crankshaft and at another end to the crosshead to translate the crankshaft's rotational movement into linear movement of the crosshead and thereby the plunger. The end connected to the crosshead is secured to the crosshead by a bushing located within the crosshead that allows the connecting rod end to pivot during operation. The bushing extends more than 180 degrees, retaining the connecting rod with the crosshead without the need for a wrist pin. The end secured by the bushing can be retained within the bushing by a lock plate, and retainers without the need for a wrist pin.

Abstract: A scotch yoke type fluid device in which the pistons are decoupled from each other is provided. Each piston of the device has its own pair of sliding surfaces and its own slider. The sliding surface of each piston is disposed on the same side of a big end bearing of a crank. The main axis of the crank is movable along a path such that the pistons are neither substantially retarded nor advanced. The effective centre of mass of the crank, piston and slider remains stationary relative to the crank axis. Each piston includes a guide for constraining the piston to move along the piston axis. An intermediate member may interconnect the piston and the slides.

Abstract: A non-internal combustion reciprocating engine has an enhanced mechanical advantage lever system for efficiently converting linear motion from reciprocating pistons to rotary motion at a crankshaft. The engine comprises a chassis, at least two sets of binary cylinder systems mounted on the chassis, a crankshaft and a lever system. Each lever system has a piston lever, two thrust rods and a central drive lever. Each piston lever is pivotally attached to the chassis and pivotally attached to a piston rod extending from a piston cylinder. The two thrust rods are pivotally attached at one terminus to the piston lever and pivotally attached at a second terminus to the central drive lever. The two piston cylinders of each binary cylinder system work in concert to efficiently transfer power to the crankshaft.

Abstract: A ring cam for a fluid-working machine is formed from a plurality of segments. The segments comprise a leading cooperating formation which has a piston facing surface which forms part of the working surface, at a trailing end, and which is recessed from the working surface at a leading end, and a trailing cooperating formation which has a piston facing surface which forms part of the working surface at a leading end, and which is recessed from the working surface at a trailing end. The segments having piston facing surfaces which are in compressive stress such as to partially or fully compensate for tensile stress arising from the action of rollers in use. The segments form a wavelike cam surface and attachment means are provided, through the working surface, on whichever of the leading or trailing surfaces thereof is subject to lowest forces from pistons in use.

Abstract: A non-collinear valve actuator includes a primary actuating system and a return spring system with each applying forces to a linkage system in order to regulate the flow of a quarter-turn valve. The primary actuating system and return spring system are positioned non-collinearly, which simply means the primary actuating system and return spring system are not in line with each other. By positioning the primary actuating system and return spring system in this manner, the primary actuating system can undergo a larger stroke while the return spring system experiences significantly less displacement. This allows the length of the return spring to be reduced due to the minimization of displacement thereby reducing the weight of the return spring system. By allowing the primary actuating system to undergo longer strokes, the weight of the primary actuating system may also be reduced. Accordingly, the weight of the non-collinear valve actuator is reduced.

Abstract: The actuator unit includes a hollow body defining a sliding chamber within; a piston mounted sliding inside said sliding chamber such to provide an actuation force and operated by a fluid fed from the outside; a body having one transmission end for the transmission of said actuation force prolonged outside said sliding chamber and one hooking end hooked to said piston, amplification means being interposed between said body and said piston to amplify said actuation force so as to obtain an amplified actuation force.

Abstract: A scotch yoke type fluid device in which the pistons are decoupled from each other is provided. Each piston of the device has its own pair of sliding surfaces and its own slider. The sliding surface of each piston is disposed on the same side of a big end bearing of a crank. The main axis of the crank is movable along a path such that the pistons are neither substantially retarded nor advanced. The effective centre of mass of the crank, piston and slider remains stationary relative to the crank axis. Each piston includes a guide for constraining the piston to move along the piston axis. An intermediate member may interconnect the piston and the slides.

Abstract: A positive-displacement reciprocating compressor, comprising a plunger slidingly coupled inside a cylinder, in which a compression chamber is located, and operatively connected to a motor which put it in motion inside the cylinder. The motor has a rotation shaft coupled with an eccentric cam mechanically connected to the plunger and able to impose longitudinal displacements to the plunger according to an orthogonal direction with respect to the rotation axis of the shaft.

Abstract: The reciprocating piston mechanism with an extended piston offset is provided. The mechanism is of the type that contains at least one cylinder having a longitudinal axis, at least one piston that has a pivot pin and is slidingly installed in the cylinder, a main driveshaft having a central axis, which is offset at a distance from the longitudinal axis of the cylinder, a circular cylindrical body, e.g., a circular eccentric, which is non-rotationally secured on the main drive shaft and a rocker arm, which in essence is a second order lever. The lever is pivotally mounted on the circular eccentric. The mechanism is also provided with a connecting rod that connects the cylinder to one arm of the rocker arm/lever. The other arm of the rocker arm/lever has a roller that is guided in a confined pathway and works as a fulcrum of the lever and a stabilizer/rudder at the same time.

Abstract: An improved scotch yoke engine of pump including a piston joined to a yoke structure wherein the piston (1) is free to move along at least one axis defined by a flying cross (60) relative to the yoke structure (7) during piston reciprocation, the piston and yoke structure being joined in a flat type joint arrangement and the piston prevented from rotation around the piston axis by engagement of the piston and the yoke with the flying cross, the flying cross being not locked in position between the piston base (50) and the yoke shank end arrangement (700).

Abstract: This is mainly an one cylinder environmental friendly two stroke engine with a lubrication and a gas control mechanism similar to a four stroke engine. An additional rotation inside of a cylinder of a piston making a stroke motion is utilized for a better gas control mechanism. Control edges on the rotating piston open and close ports in the cylinder in the right sequence, most importantly the exhaust port will be closed prior the transfer port will be open. The piston with the rigidly connected L-shaped piston rod rotate around the axis of symmetry of the piston by a rotating spherical bearing rigidly, but eccentrically connected to a rotating shaft. A certain angle between the shaft and the axis of rotation of the piston creates also a stroke motion. An oil-ring around the piston rod works in the same way as by a four stroke engine.