Abstract: A fluid system includes a reservoir having a first reservoir chamber and a second reservoir chamber separated by a movable barrier, the first reservoir chamber being configured to contain a working fluid. The fluid system includes a piston housing defining an internal volume and a piston movable within the internal volume, the piston separating the internal volume into a first piston chamber and a second piston chamber, the second piston chamber being fluidly coupled to the second reservoir chamber. The fluid system includes a fluid supply configured to provide a control fluid to the first piston chamber.

Abstract: A shaft-distributed double-acting roller piston pump includes a front end cover, a pump casing, a rear end cover and a pump core assembly. The pump core assembly includes a guide rail assembly including left and right guide rails arranged back to back. The side surfaces of the left and right guide rails away from each other are space cam curved surfaces. A flow distribution shaft is installed in the center of the guide rail assembly. A cylinder assembly is installed on both sides of the guide rail assembly including left and right cylinders, between which a piston assembly is arranged. The piston assembly forms left and right closed cavities with the left and right cylinders respectively. The piston assembly performs axial reciprocating linear motion under the constraint of the cylinder assembly and the guide rail assembly, and the volumes of the left and right closed cavities change continuously.

Abstract: Embodiments of the invention provide an actuator (100) for a valve assembly. The actuator can include a yoke (146) with at least one bore (196), a first rod assembly (136), and a first slide member (148) seated within the at least one bore and pivotally connected to the first rod assembly. The yoke can be configured to rotate about a yoke axis (198) to actuate the valve assembly. The first rod assembly can be configured to move in a first direction transverse to the at least one bore and the yoke axis. The first slide member can be configured to slide telescopically within the at least one bore as the first rod assembly moves in the first direction to transmit torque to the yoke for actuation of the valve assembly.

Abstract: A paint sprayer array may include an array frame. The array frame may include a first support member. The paint sprayer array may include an array mount. The array mount may include an array support member. The array mount may be detachably mountable to the array frame. The paint sprayer array may include a plurality of sprayers. Each sprayer of the plurality of sprayers may be detachably mountable to the array support member of the array mount and operable to selectively atomize paint. The paint sprayer array may include a sprayer activation assembly. The sprayer activation assembly may be operable to selectively activate at least a portion of the plurality of sprayers. The paint sprayer array may be selectably mountable to an aerial work platform. The aerial work platform may move the paint sprayer array to paint a large work surface.

Abstract: A reciprocating-piston machine includes at least one first cylinder and at least one first piston assigned to the first cylinder as well as at least one second cylinder and at least one second piston assigned to the second cylinder. During operation, the first piston and the second piston are deflected in a respective cylinder displacement chamber of the respective first cylinder and the second cylinder. The reciprocating-piston machine further includes a crankshaft which, during operation, can be driven and which has an eccentric crankshaft journal and a drive shaft coupling designed for the coupling of a drive shaft of a drive motor for driving the crankshaft. Additionally, the reciprocating-piston machine includes a first connecting rod configured to deflect the first piston, a second connecting rod configured to deflect the second piston, and a bearing pin about which the first and second connecting rod are rotationally movable.

Abstract: An actuator for use in a control valve assembly that has a structure amenable to manufacture. The actuator may comprise a housing comprising a plurality of walls secured to one another with fasteners to form an interior cavity, a torque hub disposed in the interior cavity, the torque hub comprising a torque body and a torque arm that are releasably engaged with one another via fasteners, each of the torque body and the torque arm having interfacing geometry that defines surfaces that engage with opposing surfaces on the other; and a load generator coupled with the torque hub.

Abstract: A reciprocating piston machine includes a first cylinder and a first piston assigned to the first cylinder and a second piston assigned to the first cylinder or a second cylinder. The reciprocating piston machine further includes a crankshaft having an eccentric crankshaft journal and a drive shaft coupling configured for coupling a drive shaft of a drive motor for driving the crankshaft, a first connecting rod configured to deflect the first piston and configured to be moved by the eccentric crankshaft journal, and a second connecting rod configured to deflect the second piston and configured to be moved by a bearing pin. The reciprocating piston machine additionally includes at least one of a first elastomer element arranged between the bearing pin and the first connecting rod and a second elastomer element arranged between the bearing pin and the second connecting rod.

Abstract: A system for determining the operability of a valve in active service which provides a user with real time information pertaining to the Safety Margin, the valve torque or thrust, and the percentage of valve MAST that is required for operation. The system employs a combination of an actuator package comprised of a primary actuator, a tandem force module, and a controller operatively connected to the output shaft of the primary actuator, the controller including a processor for calculating the above-described values and providing an output which can be visually, audibly, or electronically observed.

Abstract: A piston may be provided which includes a first piston body portion having an end wall extending radially about a central axis along which the piston reciprocates. The piston may also include a second piston body portion having an end wall extending radially about a central axis along which the piston reciprocates. The first piston body portion and the second piston body portion are axially opposed. The piston may further include a first piston rod bore disposed in the first piston body portion extending along the central axis and a second piston rod bore disposed in the second piston body portion extending along the central axis. The piston may also include a circumferential opening disposed between the mating of the first piston body portion with the second piston body portion.

Abstract: A clamping cylinder is disclosed. The cylinder includes a cylinder block defining a receiving chamber and two vents communicating with the receiving chamber, the cylinder block further defining a through hole communicating with the receiving chamber at a side; a piston slidably mounted in the receiving chamber and defining a through groove corresponding to the through hole, the piston further comprising a resisting surface; and a pushrod assembly comprising a push block movably mounted in the through hole, and a resilient member mounted in the through groove, the resilient member is connected to the push block; wherein the resilient member is adapted to pull the push block towards the piston, and the resisting surface is configured to resist the push block so that the push block moves along the through hole when the piston slides along the receiving chamber.

Abstract: The invention is an alternative to existing crankshafts in piston driven internal combustion engines, pumps and gas compressors. The invention comprises a cylinder having both a connection for a piston connecting rod and a shaft to provide for engine related powering applications or applying power to the shaft in piston type pumps and gas compressors. A support bearing is located on the outside diameter of the cylinder. Weight reduction, simple construction, less parts, and cost savings are some of the advantages of the invention.

Abstract: Examples of a pressure wave generator configured to generate high energy pressure waves in a medium are disclosed. The pressure wave generator can include a movable piston with a guide through which a piston control rod can move or slide. The pressure wave generator can include a transducer coupled to a medium. During an impact of the piston on the transducer, the control rod can slide in the guide, which can reduce stress on the rod. The pressure wave generator can include a damper to decelerate the control rod, independently of the piston. Impact of the piston on the transducer transfers a portion of the piston's kinetic energy into the medium thereby generating pressure waves in the medium. A piston driving system may be used to provide precise and controlled launching or movement of the piston. Examples of methods of operating the pressure wave generator are disclosed.

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: A wobble drive mechanism for coupling a rotary motion to a reciprocating motion comprising a diagonal plate coupled to a rotary motion axis driving a wobble carrier having a flat side in sliding contact with the diagonal plate and a spherical side in contact with a spherical bearing recess. The wobble carrier has a bore containing at least one reciprocating drive shoe. The reciprocating drive shoe may be coupled to a piston operating within a cylinder. The reciprocating drive shoe may be free to move in the bore linearly and/or rotationally. In various embodiments, the reciprocating drive shoe comprises two or more components. In various embodiments the piston is coupled to the shoe via a fixed rod section and the fixed rod section terminates in, for example, a double cylindrical bearing T section or a spherical bearing. The reciprocating drive may operate various devices, for example, pump or motor devices.

Abstract: A coupling structure for a piston used in a fluid-pressure cylinder. The piston in the fluid-pressure cylinder includes a piston hole that runs through a central part of the piston in an axial direction thereof. One end of a piston rod and a coupling body coupled to the one end are inserted into the piston hole. The coupling body includes: a main part that contacts the one end of the piston rod; and an angled part formed around the main part and inclined at a prescribed angle with respect thereto. When the coupling body is subjected to pressure inside the piston hole, the diameter of the coupling body increases and a pointed edge of the angled part engages with an inner surface of the piston hole such that the coupling body couples the piston and the piston rod.

Abstract: A plate pump assembly for pumping various fluids including heavy crude. The plate pump assembly includes first and second chambers each having lower and upper valves. Primary upper and lower eccentric cams within the plate pump assembly are connected to an upper plate and a lower plate. A secondary eccentric cam is connected to a piston that separates the first and second chambers. A drive shaft of the assembly rotates the primary upper and lower eccentric cams to actuate the upper and lower plates alternately concealing and revealing the lower and upper valves for the first and second chambers. The drive shaft further rotates the secondary eccentric cam to actuate the piston alternately decreasing and increasing an area of the first and second chambers to receive fluids through the lower valves and compress the area within the first and second chambers to push the fluids through the upper valves.

Abstract: Disclosed is a small rotary cylinder device wherein friction loss is reduced and energy is conserved by reducing effects of a reaction force applied from cylinders to pistons, which is incorporated in a piston composite body and which linearly reciprocates, the piston composite body being eccentrically connected to a first crank shaft rotating about a shaft. Guide bearings (1c) guide linear reciprocation of first and second piston assemblies (7, 8) attached to second tube bodies (6b), which are caused by rotating a first crank shaft (5) about a shaft (4) and rotating a piston composite body (P) about the first crank shaft (5), in the radial direction of a rolling circle of second imaginary crank shafts (14a, 14b), which has a radius 2r and which is centered at the shaft (4).

Abstract: A reciprocating device which may be operated either as a compressor or an engine. Each cylinder has a reciprocating piston connected to a piston rod. Dual cylinder chambers are located in each cylinder on opposite sides of the piston. The pistons are connected to a scotch yoke which translates the reciprocating motion of the pistons to rotary motion at a shaft in the engine mode. In the compressor mode, the shaft is connected to a power source. The engine components such as the pistons, rods, bushings and cylinder lines may be high quality steel or a ceramic.

Abstract: A system comprises a first piston comprising a first piston shaft and a first drive pin. A first piston cylinder comprises a first body and a first groove, wherein the first groove defines a first aperture, the first aperture oriented axially along the first body and configured to receive the first drive pin. The first body encloses the first piston and allows the first piston to travel axially within the first piston cylinder. A drive shaft comprises an axis, a drive groove, and a surface, wherein the drive groove forms a continuous channel along the surface and receives the first drive pin. In one embodiment, a first distribution wheel comprises a first face, a second face, a first inlet aperture, and a first outlet aperture. The first distribution wheel couples to the first piston cylinder and to the drive shaft at a first end of the drive shaft, and rotates axially with the drive shaft along the axis of the drive shaft.

Abstract: The invention concerns pneumatic actuators for valves comprising a body closed by head flanges, two pistons moving in said body in opposite directions, an output shaft that turns actuated by the pistons, and a stop device on each head flange to limit the stroke of the pistons when they move away from each other towards the head flanges. On at least one side of the actuator body an adjusting device (22) is provided which includes stop means (26, 27) at varying distances from each other in a direction parallel to the movement of the pistons and arranged in a position to intercept and limit the stroke of the pistons when the latter move towards each other.

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: An actuator having one or more pistons. The piston has a rack formed in a skirt of the piston, with the rack recessed within the skirt of the piston in a groove formed between a top lip and a bottom lip. The gear, also called a pinion, engages the rack between the top lip and the bottom lip. As the rack traverses the gear, the shaft that extends through the gear is rotated. The top lip and bottom lip, and the recessed rack that is present within the skirt of the piston adds strength to the piston where the piston engages the gear. The top lip and the bottom lip assist in maintaining alignment of the rack with the gear so that the rack and gear properly mesh.

Abstract: An apparatus to transfer power from rotary power to reciprocating power includes an odd numbered multi-lobed rotating cam that acts on a follower, which, in turn, causes or acts in response to reciprocation of pistons. The follower includes offset head portions and the cylinders, in turn are actually offset in the direction of the head portions. This reduces friction and improves efficiency. Further, the cylinders can include two inlets and two outlets so that each cylinder functions when the piston moves in either direction within the cylinder.

Abstract: A composite piston unit (10) for an automatic vehicle transmission, in particular a double clutch transmission, comprises a shift rod and a control piston provided at each end of the shift rod and designed to run in a respective cylinder, wherein each control piston comprises a carrier and an elastomeric sealing element bonded to the periphery of the carrier thus forming a composite system. Each control piston is securely connected with respectively one end of the shift rod and is designed to have an axial extent of less than 0.25 relative to its diameter.

Abstract: A yoke structure for a compressor is disclosed, which is applied to a scotch yoke type reciprocating compressor. The yoke structure comprises a crankshaft (10); a crankpin (20) connected to the crankshaft (10), to rotate along a predetermined round trajectory which has the crankshaft at its pivot, as the crankshaft rotates; a frame having a pair of slide ways (41) formed on two parallel inner faces of the frame (40) opposing each other, one or more pistons (30) to be fixed to outer faces of the frame outside the slide (41) ways; a sliding block (30) positioned between the pair of slide ways (41) and rotatably connected to the crankpin (20); and a pair of self-lubricating materials (32) attached to the sliding block (30) so as to be in contact with opposing faces of the slide ways (41).

Abstract: A compressor is disclosed generally comprising a cylinder head mounted to a cylinder block having a cooling chamber and a piston channel via a bolt. A piston is disposed in the piston channel and has a contact portion that contacts the channel wall, which is integrally formed with the cylinder block, as it slides within the channel. The bolt and the cooling chamber each extend from at least as high as the highest contact point between the contact portion of the piston and the channel wall to at least as low as the lowest contact point between the contact portion of the piston and the channel wall. In certain embodiments, the cooling chamber is located between the bolt and the piston channel. In some embodiments, a crankcase is integrally formed with the cylinder block.

Abstract: An epicycling device with improved sealing. A housing is provided with adjacent walls spaced apart to allow a substantially planar partition to pass. A piston is linked eccentrically to a drive shaft and positioned within the housing, has a cross sectional shape for mating with the housing walls and includes a circular recessed surface at its corners. Seal housings with a hollow cylindrical cross sectional shape are provided at each corner of the piston housing. An inner seal element is positioned within each of the recessed surfaces with the inner seal element including an elongate cylindrical body with a slot therethrough. An outer seal element is positioned within the seal housings with the outer seal element including an elongate cylindrical body with a slot. A partition is positioned between each pair of the inner and outer seal elements and slidably engaged with the slots in the seal elements.

Abstract: Fluid pump assembly driven by a reciprocating piston, having an improved coupling between a driving shaft and a driven shaft and a fast-shifting switching mechanism for changing the direction of movement of the piston.

Abstract: An air brake actuator assembly includes a pre-formed air chamber component and a cast brake housing. A portion of the cast brake housing is cast around a portion of the air chamber component. This securely attaches the air chamber component to the cast brake housing without requiring additional fastening structures.

Abstract: A connecting rod for a piston of a compressor for a double piston has a portion supportable by a connecting rod bearing on an eccentric of a drive device, a coupling point at a distance from the portion for connecting with the piston, and at least one vibration damping device which in a course of the connecting rod is arranged between the connecting rod bearing and the coupling point.

Abstract: A reciprocating compressor of un-lubricating type, equipped with a cooling device including a cooling fan beneath a motor and provided with four gas compressors, each having a cylinder and a piston. The pistons of each gas compressor cooperate by converting a rotating motion of a crankpin of a crankshaft provided on an electric drive source via two yokes having a phase difference of 90 degrees therebetween to a reciprocating motion by a scotch yoke mechanism. The flows of compressed gases from each gas compressor are joined to one place by connecting tubes to be discharged. The lengths of each connecting tube are selected such that pressure waves of the compressed gases compete with each other at the joining point for a time period encompassing one rotation of the crankpin, whereby a pulsation resulting from gas flow discharged in concentration is decreased.

Abstract: In air flow paths of a swinging apparatus in which racks are respectively provided to pistons of a pair for swinging in cylinder bores of a pair disposed in parallel in a casing, a pinion is engaged with the racks, and the pistons of the pair are synchronously driven in opposite directions to each other by synchronously supplying and discharging pressure air to and from opposite ends to each other of the pistons of the pair, the air flow paths for supplying and discharging the pressure air to and from opposite ends to each other of the pistons of the pair are formed between a bottom of the casing and a flow path forming member mounted to the bottom.

Abstract: In accordance with one aspect of the present invention there is provided apparatus and a method for converting circular motion to radial motion. In one embodiment of the apparatus of the present invention, a mandrel is provided which includes a generally circular tubular housing. Internally of the tubular housing there are disposed a plurality of partitions which are anchored at spaced apart locations about the toroidal dimension of the housing and which define fixed fluid-tight seals across the cross-sectional area of the housing. Within the chamber defined between adjacent ones of the partitions, there is provided a piston member, each piston member has operatively associated therewith the proximal end of a linkage adapted to convert circular motion of its piston member within the housing into radial movement of the distal end of the linkage.

Abstract: A dual diaphragm pump comprises a first chamber, a second chamber, a mechanical link, and a drive mechanism. The first chamber comprises a first cavity and a first diaphragm. The first chamber couples a pump inlet to a pump outlet. The second chamber comprises a second cavity and a second diaphragm. The second chamber couples the pump inlet to the pump outlet. The mechanical link couples the first diaphragm of the first chamber to the second diaphragm of the second chamber. The drive mechanism couples to the first diaphragm and the second diaphragm. In operation, the drive mechanism drives the first diaphragm causing first fluid within the first cavity to exit the pump outlet while causing second fluid to be drawn from the pump inlet into the second cavity. Further in operation, the mechanical link imparts an inlet pressure force from the second diaphragm to the first diaphragm.

Abstract: In a cylinder having a piston 2 and a cylinder body 3 having a piston chamber 4 in which said piston 2 is slidably accommodated, a guide shaft 9 extending toward the piston chamber 4 is provided on a head-side end wall 8 of the cylinder body 3, and the piston 2 includes a guide hole 2c in which the guide shaft 9 is accommodated. A plurality of grooves 9a and 2d respectively extending in axial directions are provided between an outer peripheral surface of the guide shaft 9 and an inner peripheral surface of the guide hole 2c. A plurality of steel balls 13 are provided between the grooves 9a and 2d.

Abstract: A fuel pump comprising a first pumping plunger reciprocable within a first bore and defining, with the first bore, a first pumping chamber. A second pumping plunger is reciprocable within a second bore and defines, with the second bore, a second pumping chamber. The fuel pump further comprises a supply passage, whereby fuel from the first pumping chamber is supplied to the second pumping chamber. A drive arrangement is provided for driving the first and second pumping plungers in both an extending direction and a retracting direction such that when the drive arrangement drives the first pumping plunger in its retracting direction, the second pumping plunger is driven in its extending direction to expel fuel from the second pumping chamber, and when the drive arrangement drives the first pumping plunger in its extending direction, the second pumping plunger is driven in its retracting direction and fuel is expelled from the first pumping chamber through the supply passage to the second pumping chamber.

Abstract: An actuator for rotating a shaft includes a housing having a first port, a second port and a drive track. A first drive means is coupled to the first port and a second drive means is coupled to the second port. An array of balls which are spaced apart by spacers define a drive train extending from the first drive means to the second drive means via the drive track. A drive pin which extends outwardly from the shaft is connected to the drive train and the first and second drive means are driven so that the drive train will rotate the drive pin and hence the shaft.

Abstract: The invention provides a rotary actuator having a rack driven in an oscillating manner by an air pressure, a pinion engaged with the rack, and a cushion mechanism for stopping the rack to at least one normal or inverse stroke end in a cushioning manner. The cushion mechanism has an exhaust port open to a pressure chamber at a position close to a chamber end rather than a port hole, a flow amount adjusting mechanism for restricting a flow amount of the exhaust air discharged from the exhaust port, and a cushion packing mounted to an outer peripheral surface of the piston and operating so as to shut the port hole from the pressure chamber immediately before the piston reaches the stroke end, thereby discharging the air within the pressure chamber through the flow amount adjusting mechanism.

Abstract: The invention relates to a hydraulic piston-cylinder-unit (10) for a slewing drive with at least one piston, which can be slid in a cylinder and exhibits fastening means, by means of which the piston can be connected in such a manner to a coupling rod that the working tool can be swung by means of a movement of the piston. In accordance with the invention the cylinder exhibits fastening means, by means of which the cylinder can be connected to the working tool or to a carrier of the slewing drive.

Abstract: A radial bellcrank actuator comprising a piston with a circumferential piston groove, and a bellcrank attached to an output shaft. The bellcrank has a bellcrank piston lobe at one end, and a bellcrank output shaft lobe at the other. The bellcrank piston lobe is attached to the bellcrank output shaft lobe at a bellcrank waist. The bellcrank piston lobe is sized to fit into the piston groove, such that reciprocation of the piston causes rotation of the bellcrank and attached output shaft. Relationships between the dimensions of the bellcrank lobes, the distance between their centers, the thickness of the bellcrank piston lobe, and the waist width are disclosed, which permit the preferred embodiment radial bellcrank actuator to provide up to 90 degrees of rotation. Thus, the instant invention is economical, simple, long-lasting and provides symmetrical loading to its components.

Abstract: A fluid displacement apparatus includes a cam rotor connected to a drive shaft and having a first arm extending therefrom. A plate is tiltably connected to the drive shaft. The plate has a surface disposed at an adjustable inclined angle relative to a plane perpendicular to the drive shaft and has a second arm extending therefrom. The plate and the piston are coupled, so that the pistons are driven in reciprocating motion within the cylinders upon nutation of the plate. A pin member is disposed in the second arm of the plate. An engaging device is disposed in the cam rotor. The pin member is slidably disposed in the engaging device, so that the cam rotor is coupled to the slant angle for permitting the inclination of the slant plate to vary.

Abstract: The present invention relates to a radial piston machine including radial pistons which are guided in the direction of the piston axis in a housing, a driver which is coupled to the radial pistons, and an eccentric drive which is arranged inside the driver following the motion sequence of the eccentric gear. Perpendicular to the piston axis, a radial clearance which corresponds at least to the stroke of the radial piston is adjustable between the eccentric gear and the driver.

Abstract: A rotary valve actuator with movable actuator linkage maintained in a constant "pull-pull" tension, includes a sliding canister, rotatable lever, and a return spring substantially aligned in-line with each other. The linear motion of the canister in response to an expanding and contracting pressurized bladder is converted through chain linkage into rotary lever motion. The return spring is connected through respective chain linkage to the lever so the pulling tension of the spring/lever linkage rotates the lever and maintains tension on both chain linkages. Adjustable travel stops are provided. In an alternate embodiment the return spring chain linkage is configured at right angles to the linear movement of the canister. A double acting rotary valve actuator with pressurized bladders on opposite sides of a rotatable lever. One bladder is oval shaped.

Abstract: A piston-type positive-displacement liquid-metering pump with an output-control apparatus for varying the pump output volume per piston stroke by very minute amounts on a smoothly gradual and continuous basis, in which an actuator or actuation portion of the piston has an associated stop structure for limiting its allowable movement to thereby limit the output volume produced on each stroke of the piston, and an indexing member disposed in alignment with the stop structure and having a portion engageable therewith to effect the aforementioned limitation on allowable piston movement and thus define the stroke length of the piston. A continuously variable coupling is operatively disposed between the indexing member and the pump body and/or the indexing member, for changing the effective position of the stop structure relative to the pump body or indexing member and thus changing the allowable length of the piston stroke.

Abstract: The invention relates to a hydraulic pump unit with an electric drive motor and a radial piston pump that is provided as a return feed pump for a motor vehicle for a slip-regulated, hydraulic brake system. To drive the pump pistons, the invention provides a rod-shaped eccentric element that is supported eccentrically with ball heads in a shaft end of a drive shaft of the drive motor and disposed on an opposite side of the pump pistons in a pump housing is supported so that the eccentric element can swivel around a solid angle. When the drive shaft is rotated, the eccentric element executes a movement on a surface of a cone so that the pump pistons resting against the eccentric element are driven in a reciprocating stroke motion. The invention has the advantage of a mechanically defined bearing support of the drive shaft and eccentric element so that the bearing of the eccentric element, which bearing is fixed to the housing, does not have to be exactly flush with the drive shaft.

Abstract: An electro-hydraulic valve actuator comprising an actuator casing; a piston/rack means in the casing having walls reciprocating linearly to effect linear movements, the reciprocating walls defining a center chamber therebetween and two outside chambers inside the casing; an output shaft in communication with the piston/rack means for driving a valve, the output shaft effecting rotational movements in response to the linear movements of the piston/rack means; resilient return means in each of the two outside chambers engaging the reciprocating walls of the piston/rack means and inner end walls of the casing, the resilient return means biasing the reciprocating walls of the piston/rack means to a closed position; a pumping means; a primary internal flow path for transferring hydraulic fluid from the pumping means to a first output port and into the center chamber, the hydraulic fluid in the center chamber causing the piston/rack means to expand in the casing to transmit the linear movements to the output shaft;

Abstract: A device for transmitting power between mechanical movements which includes a fluid pump coupled to a first mechanical movement for pumping a fluid, a fluid motor coupled to a second mechanical movement and a manifold connecting the fluid pump and the fluid motor capable of conducting fluid output from the fluid pump to the fluid motor to drive the fluid motor and recirculate the fluid back to said fluid pump. Either the fluid pump and/or the fluid motor incorporates a conjugate drive motion translator. The power transmission is suitable for use on a bicycle replacing the typical gears and chain and preferably includes a shunt to permit the motor to override the pump, an apportionment valve to control the ratio of movement between a first and second mechanical movement, and a brake valve for stopping the second mechanical movement. Either the fluid pump and/or fluid motor may be of a variable output design incorporating a crankshaft of variable stroke, adjustable on-the-fly.

Abstract: The present disclosure is directed to a power plant, and especially two or more such power plants connected together. The power plant especially features a piston connected with a reciprocated but non-rotating piston rod which connects with a pump piston at the opposite end. Power is generated by the power piston and imparted through straight reciprocating motion to the pumped piston. Two or more of these power plants are operated together by connecting them together through a connective link so that operation of one times the operation of two or more units slaved to the first. Synchronized operation is obtained.

Abstract: The invention is based on a reciprocating piston pump having two radial pistons disposed symmetrically to one another, which are drivable to a reciprocating motion by an eccentric disposed between them and are held in contact with the eccentric by a hoop spring that engages the pistons. For ease of installation, the invention proposes embodying the hoop spring as a bent wire part, with two open, hooklike eyelets on their ends, which ends are inserted into annular grooves of the pistons and enter into a snap connection with them in order to hold the pistons tightly against the eccentric.

Abstract: The apparatus comprises a lever member having a first regulator which is provided at an end of the lever member and functions as a force point, and a second regulator which is provided at another end of the lever member and functions as a movable fulcrum. An action point hole is provided between both of the ends of the lever member and is engaged with a crank pin of a crankshaft. The first regulator is connected with a piston as a reciprocal motion member, and the first and second regulators has a support member for movably supporting the force point and the movable fulcrum such that the force point and the fulcrum are movably in a lengthwise direction of the lever member.