Abstract: The servomotor comprises a piston assembly (9) provided with a tubular hub (25) sliding on a valve sleeve (11) provided with a return roller (51) for a flexible elongate member (40) fixed between an end wall (4', 43) of the casing and an arm (47, 48) of the piston assembly normally extending beyond the return roller (51), between the latter and said end wall.

Abstract: The invention relates to belt cylinders, i.e. piston rodless operating cylinders in which steel belts, in particular, are used in transferring force; even during production, belts of this kind have the negative property of not being sufficiently straight, instead they are bow shaped and this leads to break downs in that the belts either destroy the flanges on the deflecting rollers in a very short time or, if there are no flanges, they run off the rollers; for this reason despite the technical advantages, belt cylinders have not been successful in practice.A satisfactory operation of these belt cylinders may be achieved if, and only if, the belts which transfer force from the piston to the force pick-up are in absolute alignment.

Abstract: Within a cylinder of a double-acting piston-and-cylinder unit there is displaceably arranged a piston. A spatially moveable piston rod in the form of a universal or ball pivot-link chain is connected with the piston. The piston rod is lengthwise guided by tensioning or tie bolts internally of the cylinder, these tensioning bolts clamping towards one another both of the cylinder heads and piercingly extending through the cylinder. Externally of the piston-and-cylinder unit the piston rod is guided within a guide tube which is connected with one of the cylinder heads. This guide tube can possess a random spatial extent. At the piston rod there is attached a coupling element with which there can be coupled the object or the like which is to be moved. This coupling element extends through a longitudinal slot provided in the guide tube. The spatial mobility of the piston rod enables guiding the piston rod externally of the piston-and-cylinder unit in a random direction.

Abstract: Cylinder/piston drive especially for re-tightening systems in automatic safety belt winding devices, with a cylinder in which a drive piston is movably guided, as well as with a pressure accumulator which can be connected to the interior of the cylinder. The drive piston 13 has in the region facing the connecting point of the pressure accumulator (cartridge 34) at least one reduced cross sectional pressure surface (annular 15, 27) and operates with a guide part (10,21) in the cylinder 1 conforming to the reduced cross sectional shape of the drive piston such that at the beginning of the pressure action, only part of the cross section of the piston is exposed to the pressure force.

Abstract: A pump for compressing a low temperature high density liquid gas, e.g. liquid helium, wherein the piston is driven by a motor through a four bar linkage which converts rotary motion to reciprocating motion. The pump also includes an improved piston ring assembly, piston venting apparatus and a cushioned discharge valve. A two-stage pump in combination with support equipment provides an improved pumping cycle wherein low temperature density liquid or gas e.g. liquid helium can be withdrawn from a storage reservoir, vaporized and compressed into cylinders.

Abstract: A pump (10) is disclosed for use in pumping a fluid (14) from a borehole (12) to the surface. The pump includes a first and second pumping string (20, 22) extending into the borehole and a return string (26) extending from the borehole. First and second pistons (82, 94) are slidably mounted at the ends of the first and second puming strings within the borehole, respectively for reciprocation between extended and retracted positions. First and second pumping cylinders (56, 64) are secured in fixed relation to the first and second pumping strings (20, 22) so that the first and second pistons (82, 94) are slidable therein. The pistons and pumping cylinders define first and second pumping chambers (92, 104). Each of the first and second pistons includes a gear rack (88, 100) having teeth meshing with the teeth on a stroke return gear (106).

Abstract: A pumping unit for actuating a linear reciprocable pump rod comprises a frame having a pair of spaced apart vertical guides for guiding vertical reciprocating movement of a traveling pulley assembly connected to a linear extensible hydraulic cylinder mounted on the frame directly under the pulley assembly. The pulley assembly includes two rotatable sheaves over which are trained, respectively, flexible cables which are anchored at their opposite ends to the frame and to a bracket connected to the pump rod. The arrangement provides a single purchase pulley system providing for a pump rod stroke length of twice the stroke length of the cylinder actuator. A hydraulic control system for reciprocating the cylinder includes a solenoid operated valve which is controlled by a cam actuated switch to alternately provide for conducting hydraulic fluid to and from the cylinder. The valve actuating switches are tripped by spaced apart cams mounted on a rod connected to the pulley assembly.

Abstract: The present invention is directed to an improved fail-safe actuator and hydraulic system incorporating the same. The actuator includes energy storage means in the form of a spring adapted to set a control device in a predetermined condition, illustratively in the closed condition, responsive to a failure situation, illustratively, a power failure. The actuator includes a coupling which permits normal operation of the control device without cycling the spring energy storage means, thus increasing the life of the spring and eliminating energy wastage inherent in cocking the spring during each operative cycle.

Abstract: A piston-cylinder device, such as a Rankine cycle engine, is provided with one or more variable displacement cylinders and variable stroke pistons for accommodating loads of variable torque. Cylinder displacement is varied by a movable cylinder head internally of the cylinder and auxiliary to a fixed cylinder head, and piston stroke is varied by a variably fulcrumed lever linking piston connecting rods with a crankshaft. For the engine particularly, load torques are continually sensed and cylinder displacement adjusted accordingly. In turn, the position of the movable cylinder head is continually sensed, and the lever fulcrum adjusted accordingly.

Abstract: A pump driving mechanism of this applications is formed by supporting a piston body 3 provided with a piston rod 9 and an elastic arm 18 movable in directions vertical to reciprocally moving directions of the piston body, between respective free ends of a pair of elastic leg pieces 16 and 17 fixed at one end and freed at the other end, and connecting an eccentric shaft 23 driven to be rotated by a motor 22 to a shaft bearing 21 formed at a free end of the elastic arm 18, whereby a low noise reciprocating movement within a cylinder 14 is provided to a piston rod 9 by rotations of the eccentric shaft 23.

Abstract: A motion conversion device for converting between the reciprocating motion of the pistons in a Stirling engine and the rotating motion of its output shaft, and for changing the stroke and phase of the pistons, includes a lever pivoted at one end and having a cam follower at the other end. The piston rod engages the lever intermediate its ends and the cam follower engages a cam keyed to the output shaft. The lever pivot can be moved to change the length of the moment arm defined between the cam follower and the piston rod the change the piston stroke and force exerted on the cam, and the levers can be moved in opposite directions to change the phase between pistons.

Abstract: An apparatus of the prime mover type for reconstituting a liquid concentrate. Water under pressure, supplied by a municipal system, alternately flows into and out of opposite ends of a first cylinder in which a double-acting piston is slideably mounted, thereby reciprocating the same. From the first cylinder, the water flows to a collection hopper where it is mixed with a concentrate requiring reconstitution.The concentrate is pumped to the collection hopper by a single-acting piston means, disposed in a second cylinder, that is mechanically connected to the double-acting piston. The displacement volumes of the first and second cylinders are the same so that each cycle of the double acting piston pumps two parts of water into the collection hopper for every one part of concentrate pumped thereinto by the single-acting piston.

Abstract: A portable positive displacement respirator/ventilator is provided for both a pressure sigh and a volume sigh of predetermined duration and frequency by providing a variable length crank arm connecting a piston through a connecting rod by mounting the connecting rod on a circular toothed gear, pivoting the gear for movement at its center and driven on its outer edge with a separate motor driven pivot gear which when moved relocates the effective length of movement of the point of attachment of the connecting rod thereby changing the volume swept by the piston for the same arc of reciprocal movement of the larger circular toothed gear enabling both a volume change or a volume sigh with the device. A cooperating multiplicity of adjustable pressure regulating valves where at least one can be intermittently closed during the operation of the device regulates ventilation pressure or breathing pressure and sigh pressure.

Abstract: A pump (10) is provided for pumping a fluid (14) from a borehole (12). The pump includes first and second pumping strings (20, 22) extending into the borehole and a return string (50) extending out of the borehole and to a storage tank (18). An upstroke cylinder (34) is slidably mounted for reciprocation on the first pumping string (20) and a downstroke cylinder (38) is slidably mounted for reciprocation on the second pumping string (22). A pump barrel (80) is slidably mounted to the return string (50) and forms a pumping chamber (86). Fluid from the borehole enters the pump chamber (86) through a one-way check valve (84) to equalize the fluid pressures between the pumping chamber and borehole. A pumping fluid is then entered into the first pumping string (20) to urge the upstroke cylinder (34) to the extended position, tensioning a cable (108) to move the pump barrel (80) and downstroke cylinder (38) to the retracted positions pumping the fluid in the pumping chamber up the return string (50).

Abstract: A developing machine has a battery of vessels which receive metered quantities of liquid from discrete membrane-type pumping units. The pumping units constitute part of an apparatus having a single drive for the reciprocable membrane-deforming pumping elements of all units. The components of the drive for the pumping units as well as the pumping units themselves, are discrete modules which are rapidly connectable to or detachable from a single supporting frame. The drive has a rotary eccentric which transmits motion directly to the pumping elements of all pumping units. The strokes of the pumping elements are adjustable independently of each other.

Abstract: An air operated reciprocating tool, including, an air operated double ended piston positioned within a cylinder for reciprocation within the cylinder, a valve assembly in communication with a source of air for controlling the application of the source of air in alternation to opposite portions of the piston for reciprocation of the piston, a shoe member for supporting a tool and with the shoe member mounted for sliding motion, and belt means forming a loop for interconnecting the ends of the double ended piston and the shoe member and with the belt means supported by pulley members located adjacent the ends of the double ended piston and with the reciprocating motion of the double ended piston transmitted to reciprocating motion of the shoe member.

Abstract: A motor vehicle having a plurality of drive wheels and a steerable wheel. The steerable wheel is rotatably mounted on the frame with an upright steering post. A hydraulic powered transversely movable cylinder is connected to a sprocket mounted on the steering post with a pair of chains. The cylinder is linearly movable relative to a piston and a transverse rod. Adjustable members connect opposite ends of the rod to the frame and hold the rod in linear tension. The cylinder is supplied with hydraulic fluid under pressure from a pump driven by an internal combustion engine. A control valve having a spool connected to the vehicle steering wheel controls the flow of hydraulic fluid under pressure from the pump to the cylinder thereby steering the vehicle.

Abstract: The invention relates to a telescopic elevator device for dollies comprising in combination a wheel-mounted base member, a first extension member telescopically slidable on the base member, a second extension member telescopically mounted within the first extension member and apparatus for controlling the contemporaneous sliding of the extension members with respect to the base with a different speed so that the second extension member has a sliding speed which is the double of the first one.

Abstract: A piston rod is formed of fiber reinforced material so arranged that an elastic connecting zone is provided between the rod and the piston, thereby avoiding bolting one end of the piston rod to the piston. The cavity inside the piston has a dovetail recess. The fibers are anchored in the cavity and recess by embedding the fibers, which fan out in a uniform distribution from said elastic connecting zone, in a synthetic embedding material.

Abstract: A lifting stand of a motor-driven truck. The lifting stand being telescopically extensible and comprising an outer frame attached to the truck and an inner frame displaceable between a lower retracted position and an upper projecting position. The inner frame supports a lifting carriage provided with a fork and displaceably mounted to the inner frame for movement along this. The lifting carriage is arranged to be moved along the inner frame by way of specially arranged hydraulic cylinders while the inner frame remains immobile in relation to the outer frame and good visibility is maintained through the lifting stand.

Abstract: A hydraulic apparatus for the operation of an elevator comprises a linearly extending hydraulic cylinder and a piston slidable therein. The piston has on its downstream side a plurality of pivotally interconnected thrust members the last one of which has a slide member which is provided with a support arm with which the slide member passes through a longitudinal slot in the jacket of a linear cylinder extending in a direction parallel to the path of motion of a load receiving device and to which the load receiving device is attached. The linearly extending hydraulic cylinder and the linear cylinder are open at the lower ends and the thrust members depend downwardly at the two cylinders. The thrust members have a continuous toothing and a gear supported rotatably between the two cylinders passes through longitudinal slots in the jackets of the two cylinders and engages with the toothing.

Abstract: A motor and especially a thermal motor has a connecting rod assembly comprising two radial rolling surfaces constituted by pairs of cones, one cone of each pair being fixed while the other is carried by a rotatable inclined seat.With this arrangement the position of the pistons of the motor at the end of their strokes is rigidly controlled and centered.

Abstract: An adjustable expansible chamber pump for liquids is disclosed, which is resistant to corrosion and which preferably utilizes a compressible bellows of synthetic plastic material, which is compact, which has improved expansible chamber actuating mechanism comprising an adjustable eccentric driving member to vary the stroke to adjust the quantity of liquid delivered, the adjustment of the eccentric being easily accomplished and the setting being visible and approaching linearity and adapted for delivery of small quantities of a specific component, the pump being readily employed with similar pumps for simultaneous or staggered pumping of a plurality of liquids for mixing and which can utilize a single driving motor.

Abstract: The present invention is directed to an improved fail-safe actuator and hydraulic system incorporating the same. The actuator includes energy storage means in the form of a spring adapted to set a control device in a predetermined condition, illustratively in the closed condition, responsive to a failure situation, illustratively, a power failure. The actuator includes a coupling which permits normal operation of the control device without cycling the spring energy storage means, thus increasing the life of the spring and eliminating energy wastage inherent in cocking the spring during each operative cycle.

Abstract: A stroke adjustment for reciprocating mechanisms which includes an external adjusting wheel to vary internally the longitudinal position of a carrier through an interconnected shaft and gear. A butterfly arm is pivotally connected to the power shaft and is pivoted by the carrier to raise or lower one end of a connected crank to vary the length of the piston stroke by changing the eccentricity of the crank.

Abstract: A variable angle wobble plate drive for varying piston displacement has constant velocity coupling from the wobble plate to the frame which permits all axis-dynamic balancing. The coupling uses an idler element rotating on a tilted axis portion of the shaft, and conical gear sets connecting the idler member to the machine frame and the idler member to the wobble plate. The sum of the acute angles from the tilted axis to the shaft, and to the driving axis, is made greater than the maximum driving angle thereby permitting low reaction torque on a driving angle control mechanism without reversal of control torque.

Abstract: For transferring a rotary drive to a movable member in order that the latter may be reciprocated with a variable amplitude stroke, a mechanism is disclosed which comprises two parallel shafts, each carrying an arm or a disc, a peripheral pin on each disc being pivoted to one end of a connecting rod, the opposite end of which is pivoted to the either end of a rocker. The central pivot of the rocker is borne by a member which is so guided that only a reciprocal motion is permitted thereto.

Abstract: A hydraulic actuator, readily assemble and disassemble, which can be used for effecting actuation of food processing machinery or bulk bait or other commodity dispensers. Since it is necessary that such devices be safe and non-polluting, components which come in contact with the hydraulic fluid can be made of plastic so that tap water can be utilized as the hydraulic fluid.The actuator is made readily assemble and disassemble by including devices for quick and easy sealing and locking of the component parts. These devices have only a minimal number of subcomponents.

Abstract: A portable pump spraying device includes a container for the liquid to be sprayed, a housing positioned above the container having a spraying chamber, a pumping unit to elevate the liquid to the spraying chamber, and a rotating disc in the spraying chamber to attenuate and impel the liquid by centrifugal force through an egress port in the housing. Interceptor baffles within the spraying chamber finely trim the liquid spray as it leaves the egress port and direct the excess liquid back to a reservoir for recirculation. The pumping unit includes a rod that is reciprocated by an eccentric on the rotating shaft on which the disc is mounted. The rod acts as a piston which on its suction stroke withdraws liquid from the container and on its compression stroke discharges the withdrawn liquid and forces it through a nozzle onto the disc in the spraying chamber.

Abstract: A tube filling and closing machine includes a material feeding device which comprises a container for the material to be packaged which opens into a cylinder in which a piston is movable backwardly and forwardly for taking in the material from the container and dicharging it out through a nozzle discharge into a package to be filled. The piston is moved by a connection to a piston rod which is connected to the piston and a valve is disposed between the filling line to the storage container for the material and a discharge line to a nozzle for filling the package. A mechanism is connected to the piston to change the stroke thereof for varying the quantity of material which is filled and this includes a lever arm which is connected to a fixed pivot at one end and its opposite end provides a journal for a rotatable shaft which carries a cam plate which is in engagement with a cam roller located at a fixed location.

Abstract: In a driving mechanism for a vacuum circuit breaker including a movable contact, a stationary contact and bellows permitting reciprocating movement of the movable contact, a bell crank is oscillated by an actuating device to reciprocate a drive bar connected to the movable contact. As the movable and the stationary contacts are worn, the displacement of the drive is increased. The increase is detected and the pivot point of the bell crank is shifted toward the stationary contact. Thus retracted position of the movable contact is shifted in accordance with the wear, and the stroke of the movable contact and hence the amplitude of variation in length of the bellows are maintained constant in spite of the wear.

Abstract: An actuator is provided for converting linear to rotary motion to manipulate a valve. Preferably, the actuator has a rotor which is rotatable about an axis and is operably associatable with the valve member. A pair of motors, preferably actuated by pressure fluid, each includes a reciprocal push rod assembly. Flexible means are coupled between the push rod assemblies of the motors and spaced apart points on the rotor such that when one of the motors is actuated, the respective one of the push rod assemblies is moved linearly in a direction to transmit torque to the rotor, thus causing the rotor to rotate about its axis in one direction and manipulate the valve member to one of open and closed positions, and when the other of the motors is actuated, the other of the push rod assemblies is moved linearly in an opposing direction to transmit torque to the rotor whereby the rotor is rotated about its axis in an opposite direction to manipulate the valve to the other of open and closed positions.

Abstract: A vertical conveyor comprising an upstanding support including spaced-apart, horizontally spaced, vertically disposed side frame members. A platform for supporting the object to be conveyed is positioned between the frame members and is vertically movable thereon from a lowermost position to an uppermost position. A first elongated power cylinder is mounted on the support adjacent one of the frame members and is substantially vertically disposed. A piston is positioned within the first power cylinder and has cables secured thereto which extend outwardly from opposite ends of the cylinder. The cables are connected to the upper and lower portions of the platform so that downward movement of the piston in the first power cylinder will cause the platform to be vertically moved upwardly and so that upward movement of the piston in the first power cylinder will cause the platform to be vertically moved downwardly.

Abstract: A feed beam for a rock drill comprises a box girder (13), a saddle (10) slidable along the box girder, and two power units (20,20a) inserted into the ends of the box girder.Each power unit comprises a pair of fixed pulleys (22,24) located outside the end of the box girder, an hydraulic jack (26) carrying a pair of movable pulleys (28,30) within the box girder, and a cable coupled between the power unit and the saddle and passing over the four pulleys.

Abstract: Apparatus for moving newly formed glass containers from a cooling dead plate to a moving machine conveyor in which the ware is engaged by a finger, with the finger being generally horizontal and engageable with the container at a point on its sidewall which best suits the moving of the container by a sliding motion. The finger, or fingers in the case of plural containers being simultaneously moved, is moved through an arc approximately 90.degree. with respect to its vertical axis, moving the containers from the dead plate to the conveyor and then the finger is retracted out of contact with the containers on the conveyor. After retraction, the finger-mounting mechanism which takes the form of a generally horizontally disposed cylinder is moved back through 90.degree. to a position opposite the position of a dead plate where the finger is then again moved outward and rotated about the axis of the cylinder mounting. In this fashion the containers are moved onto the conveyor.

Abstract: The invention is a new linkage for connecting the piston and the piston actuator in a high pressure pump. All of the compression forces transmitted from the piston actuator to the piston by this linkage will be axial forces parallel to the axis of the piston since the linkage will not transmit forces to the piston which are transverse to its axis. This linkage allows the use of hard brittle materials such as ceramic materials in the piston because any misalignment between the axises of the piston actuator and the piston will not result in bending forces being applied to the piston which would cause it to break.

Abstract: A pumping jack for use with a well having a vertically reciprocable polish rod has a base including a horizontally extending table. A hydraulic cylinder is mounted on the base, with the cylinder axis extending parallel to and above the table. A plunger is reciprocable in the cylinder along the axis and carries with it a block including a first sheave around which a first flexible line is reeved. One end of the first line is affixed to the base, and the other end of the first line extends around a well sheave mounted on the base with the well sheave periphery tangent to the polish rod, the line from the well sheave being affixed to the polish rod. The reciprocating parts are balanced at least in part in either of two ways. In one way, there is a pneumatic chamber variable in volume in accordance with the reciprocation of the polymer and provided with air under an elevated pressure sufficient to counterbalance or offset part of the reciprocating load.

Abstract: The present invention is concerned with a dual stroke drive mechanism of any size for a reciprocating device, such as a piston of a pump. It is particularly concerned with such a driving mechanism having means for selecting a particular stroke-length. It is more specifically concerned with a drive mechanism capable of imparting either one of two set stroke-lengths and means for selecting one of the stroke lengths before, or at certain intervals during, operation of the mechanism. The drive mechanism converts rotary movement of an input member into reciprocating rectilinear movement of an output member which may be connected to a piston and reciprocates the latter. A preferred application is in the field of sampling pumps for distributing liquid samples of small sizes into vials for analysis.

Abstract: A filling machine for filling several containers with predetermined amounts of a product in which the several filling units are actuated by a common driving member; the common driving member itself is actuated by two eccentric drive mechanisms each including a volume-changing adjusting mechanism of the lead screw type; the eccentric drive mechanisms are adapted to be stopped in a predetermined position by a volume-changing stoppage device to enable the installation of an interconnecting member between the two volume-changing adjusting mechanisms to assure identical adjustments.

Abstract: Variable displacement cam driven piston pump having means for the stepless adjustment of the length of the pump stroke. The stroke adjusting means has pivotally mounted spaced parallel levers, the levers being interposed between the cam and the piston of the pump, the levers being mutually coupled in their movement by a means adjustably arranged along the length of said levers, said levers being disposed on the opposite sides of a plane defined by the contact points between the lever coupling means and the levers.

Abstract: An axially oriented variable displacemnt pistoned device adaptable for use as motor and having a pivoted swash plate angularly positionable for establishing displacement of the device is fitted with externally mounted low pressure hydraulic actuators operably connected with the swash plate for operation thereof. Adjustable stops are provided in the device body to limit travel of the swash plate under urging of the low pressure hydraulic actuators.

Abstract: A rocker wheel jack is arranged on a compact frame so that the driving mechanism is placed below the rocker wheel. The mechanism is adjustable so as to vary the spacing between it and a drive wheel. The rocker wheel is adjustably spaced from the drive wheel. A pitman connects the drive wheel and the rocker wheel. The pitman connections to the wheels are further adjustable radially to the wheels. Thus a jack is provided with a possibility of multiplicity of adjustments and a minimum of vertical space and of weight for the jack. The complete unit is readily movable. The driving mechanism is readily accessible for repair or replacement. An oil level sensor is provided in the well with connections transmitting its output to the R.P.M. of the jack.

Abstract: A pair of pumps which are joined by a flexible connection passing over spaced rotatable devices positioned for rotation in a substantially vertical plane. The rotatable devices are driven alternately in clockwise and counterclockwise directions whereby the lifting of one pump occurs as the other pump is lowered. To facilitate the pumping operation, a counterweight is operatively associated with the flexible connection intermediate the pair of rotatable devices.

Abstract: A piston type air pump, for forced lung ventilation, with a variable length of stroke and a variable timing of inspiratory and expiratory phases. The pump includes a stepless change, variable radius crank arm, controllable during pump operation for changing the volume capacity of the pump. The drive motor is arranged for movement for varying the timing of piston in-movement to the piston out-movement for varying the time ratio of inspiration to expiration.

Abstract: A fuel pump for providing fuel at relatively high pressure is activated by gas pressure, created during the compression stroke of an internal combustion engine. The pump includes a piston and a hollow plunger which are biased by a single spring in opposite directions. The piston, which is exposed to gases in the engine's cylinder, is urged, by the gas pressure in the cylinder during the compression stroke, to move upwardly. A limit is placed on the piston's upward stroke. When reaching the upward limit the pressure which is applied to fuel in a fuel chamber is only a function of the force applied by the spring to the plunger. When fuel ejection is enabled, the spring pushes the plunger toward the fuel chamber to eject the fuel therefrom. Toward the end of the exhaust stroke the piston moves toward the engine cylinder, forcing the plunger to move in the same direction until the latter's travel is limited by limiting means. Fuel is then injectable into the fuel chamber for subsequent ejection.

Abstract: The invention involves an improved design for a diaphragm pump. The inlet and outlet valves for the pump have guided stems that prevent the valves from misaligning and jamming during operation. The stems extend away from each other enabling the valve heads to be moved close to each other so that the pump bowl can be made relatively short. The pump diaphragms include rim portions that cover and protect the members securing it in the pump. The stroke of the pump is adjustable by an arrangement that can vary the size of the stroke while keeping the suction and discharge portions of the stroke equal.

Abstract: A seal assembly for use in a cable cylinder to form an effective seal about a generally cylindrical cable section. The seal assembly includes primary and secondary seal members disposed on opposite sides of an alignment sleeve and a retainer sleeve, all of which are disposed within the central bore of a gland member. The central bore includes a plurality of cylindrical bore portions and means cooperating with the retainer sleeve for retaining the seal members and alignment sleeve within the gland for easy insertion and removal thereof.

Abstract: A linear positioning cylinder drive has a piston connected at one end to a load and at the other end to a cable. The cable is secured to a pulley secured to a shaft urged in a takeup direction by a coil spring or hydraulic motor. The piston is moved by a hydraulic pump through a servo valve actuated by a circuit controlled by a transducer driven by the shaft. In one embodiment, the transducer is rotary and in another embodiment the transducer is linear.

Abstract: Apparatus for the continuous feeding of plural liquids in separate streams of adjustable quantity and ratio, comprises a drive unit that drives a main pump, and that also drives at least one secondary pump. The drive unit has an oscillating or reciprocating movement, and so the pumps are piston pumps or oscillating vane-type pumps. The stroke of the secondary pump or pumps may be selectively shortened without shortening that of the main pump, so as to predetermine the proportions of the liquids to each other. The system is particularly applicable for the feeding of separate streams of synthetic resins by the main pump, and the associated hardeners, catalysts, accelerators or other auxiliary liquids by the secondary pump or pumps.

Abstract: Device for supplying fuel to the atomizer of a combustion engine comprises at least a pump to be connected with the atomizer having a piston-bounded pump chamber and an electromagnet for reciprocating said piston.Said device is improved, particularly with regard to the seal of the pump piston, the control and the adjustment of the pumped quantity of fuel, the life-time and the cooling of the device, the compactness and simplicity of construction and/or simplification of maintenance.