Abstract: A hand-operated hydraulic pump utilized to lift or trim an outboard marine engine. A wobble-action handle connects with a pinion gear which in turn drives a rack on a double-ended piston forming two cylinder chambers on opposite ends thereof. Reciprocal movement of the piston alternately pumps fluid from each cylinder chamber both of which are supplied by a common longitudinal passage in the piston across a pair of check valves located at each end of the piston. The pump housing includes the reservoir, discharge port and needle valve for relieving fluid from the discharge port back to the reservoir.

Abstract: A valve actuator employs a torsion spring type clutch to engage and disengage a drive motor and an output shaft. The torsion spring normally engages and is connected to a gear which may be engaged by a dog to cause disengagement of the clutch. The output shaft carries a pinion which is engaged with a rack carried on a piston which is slidable in a closed fluid containing cylinder. The piston includes an axial passageway with a metering orifice therein which smoothes the operation of the actuator and provides positive stops for the output shaft with a minimization of impact between the piston and the ends of the cylinder.

Abstract: An integral power steering gear with a valve in the piston is provided having a short piston and cylinder to conserve space and weight. The input shaft is mounted on a bearing carried by an inwardly projecting annular portion on the bearing cap. The projecting portion mates with a recess in the end of the piston when the piston is moved to the full extreme in that direction. The valve guide pin has been relocated at the input shaft end of the valve where maximum support of the valve is realized and improved reversibility of the valve under all conditions is gained. In the bearing cap, both a high pressure seal and a low pressure weather seal are provided. An insert ring between the two seals serves as backup to the high pressure seal. In an alternative embodiment, the insert ring may be tapered toward the inside of the gear to allow use of a thin wiper-type seal.

Abstract: A control apparatus comprising a cylinder including therein a piston non-stepwise controllable in terms of the amount of piston portion protruded and the speed of its protruding movement. The amount of piston portion protruded is controlled by an attachment position at which the cylinder is attached to an adaptor for fastening the control apparatus to a device desired to be controlled and the position of a bar extended into the cylinder through one end portion thereof to abut against a piston head. The speed of protruding movement of the piston is controlled by a control fluid fed into and discharged from a cylinder chamber divided by the piston head into two parts.

Abstract: A pressure medium servo-motor, especially for servo-steering systems, in which a working piston operating in a working cylinder is provided with a piston pressure surface actuatable by the pressure in one working pressure chamber of the working cylinder for producing a servo-force directed in the sense of the relative movement of the working piston with respect to the working cylinder; the piston pressure surface of the working piston is thereby reduced with respect to the reference value fulfilling the equilibrium condition of the piston pressure forces in the neutral position of the working piston, by a reducing piston which includes a pressure disengaging surface actuatable by the pressure in the working pressure chamber and a relief pressure surface actuatable by the pressure in a relief pressure chamber.

Abstract: A digital positioner for remote actuation of a control valve includes a double-acting actuating piston connected to the control valve and a plurality of fluid-responsive stop means disposed to either side of the actuating piston. A plurality of remotely controlled pilot valves are operatively connected to respectively control the actuating piston and selected ones of the stop means. The system is especially adapted for remotely controlling hydraulic systems having a control valve for modulated control of the system for different speeds of the system.

Abstract: A pneumatic actuator includes a cup-shape cylinder body housing a piston and having a generally flat base with a mounting hub projecting outwardly. A piston rod is slidably mounted in the hub and connects to a load such as a damper in an air mixing box. The base is formed with a bearing recess or depression means encircling the hub. The recess defines a spherical sector offset from the center of a complete sphere of the same radius. An annular swivel ring includes an inner diameter adapted to loosely fit over the hub and includes an outer periphery which is generally spherically shaped and defines a central spherical sector having a maximum planar diameter slightly larger than that of the sector defined by recess. The swivel ring is a two-part member having interconnecting slot and projection elements providing a snap joint connection, with the mounting plate firmly clamped therebetween. The swivel ring with the attachment plate fits over the mounting hub.

Abstract: A suction head or a pick-up roll in a paper machine is mounted on a pivotable lever and is movable therewith between an operative position, an intermediate position at a short distance from the operative position, and a retracted position at a substantial distance from the operative position by two hydraulic cylinder and piston units whose cylinders are articulately connected to the frame and whose piston rods are articulately connected to the lever. The piston rods are rigid with first pistons, and each unit further comprises an annular second piston which surrounds the respective piston rod. Admission of pressurized fluid into a first chamber of each cylinder results in movement of the second pistons from first to second positions to thereby move the lever from operative to intermediate position through the medium of the first pistons and piston rods.

Abstract: A carburetor has a vacuum operated diaphragm type choke control device that acts in connection with a thermostatic control to permit the carburetor choke valve to be closed during starting but provides a controlled gradual opening of the choke valve after starting. An adjustable stop member permits adjustment of the opening by limiting the extent of movement of the diaphragm. The device includes purge feature for continual self-cleaning of the device. A one-way check valve device and precision by-pass means give exact control of the choke opening.

Abstract: A double acting power boost cylinder comprising a movable servo piston for vehicle steering purposes is provided with means comprising a fixed piston protruding into a bore of the servo piston so as to reduce the effective end surface pressure receiving areas of the servo piston. Thus, the total forces acting to drive the servo piston are reduced to avoid overload or damage to a steering mechanism driven by the servo power piston. The invention has its utility in vehicles where a common hydraulic source is used for various purposes such as steering, brakes, vehicle level and the like where pressures required may vary and where the pressure required for steering is not as great as required for other purposes. Usually accumulators are used and the invention is of particular utility since it permits the use of small pumping devices.

Abstract: A pneumatic pump adapted primarily as a left ventricular heart assist device includes a flexible bladder with a rigid housing. A pneumatic driver applies rhythmical pulses between the bladder and the housing to repetitively collapse the bladder and establish a pumping action through the bladder, in conjunction with check valves in the inlet and outlet to the bladder. Between the driver and the pump there is provided a pneumatic pulse limiter which includes a flexible diaphragm isolating the driver from the pump. Pulses from the driver are transmitted to the pump only through the flexible diaphragm and the diaphragm is constrained to move only within established limits. Regardless of the magnitude of the pulse from the driver, the maximum pulse applied to the pump cannot exceed that corresponding to the maximum displacement of the diaphragm.Between successive pulses, the portion of the system between the driver and the flexible diaphragm is depressurized.

Abstract: Hydraulic door closer apparatus comprises a cylinder and an elongated piston disposed in the cylinder, the piston being made of relatively easily machined material, but having associated with it a rack of harder, wear and impact-resistant material for transmitting forces and motion to and from the piston.

Abstract: The adjusting device includes a threaded spindle onto which an adjusting nut is screwed, a frictional-engagement turning mechanism for the adjusting nut, a brake for preventing a turning movement of the adjusting nut and a resilient connection between the turning mechanism and the working piston. The brake is formed by two seal lips of a sealing arrangement stationarily connected with the working piston, the two seal lips abutting in a sealed relation against the adjusting nut and acting in opposite directions.

Abstract: A fluid actuated, valveless sanding tool is disclosed which comprises a housing containing a cylinder, a double-ended piston mounted for reciprocal movement within the cylinder, a mounting plate to which an abrasive tool can be attached, and a double rack and pinion connecting means reciprocally driving the mounting plate. A fluid supply system delivers pressurized fluid to a central portion of the bore and a vent system permits venting of the ends of the cylinder. The piston has two end seals and three internal, main seals which maintain a fluid tight relationship with the inner cylinder wall. Two internal passages in the piston are in communication with the annular areas between the three main seals and the respective ends of the piston.

Abstract: A variable stroke compressor is disclosed that includes a casing with an upper and lower piston, the lower piston being connected to a piston rod and the upper piston being slidably received for reciprocal movement on the piston rod. Means are provided on the upper piston to control its descent towards the lower piston.

Abstract: An extensible cylinder slidably containing a fluid pressure actuated piston is provided with differential first and second area portions exposed to a piston actuating pressurized fluid and an opposing pressurized fluid which opposing fluid is pressurized by a fluid pressure amplifier or booster responsive to the piston actuating pressurized fluid to maintain a proportional relationship between the pressures of the piston actuating fluid and opposing fluid to thereby generate a force balance on the cylinder. A stop on the cylinder is engaged by the piston upon completion of the piston stroke in the cylinder causing the cylinder to advance with the piston to thereby extend the stroke of the piston. The volumetric requirement of the piston actuating pressurized fluid for a given displacement of the piston is constant regardless of the position of the extensible cylinder.

Abstract: In apparatus for molding glass into hollow-shaped articles such as glass containers, glass is delivered to a parison mold wherein the glass is shaped either by a plunger or by a counter-blow with the end of the parison mold, through which the glass is delivered, closed by what is termed a "baffle." The mechanism for moving the baffle on a conventional IS machine must be capable of moving the baffle from an upper, radially displaced position, to a lower aligned position over the mold. The operation of the baffle seating motion is accomplished by the use of a vertically reciprocable, fluid-operated motor in which a baffle arm carrying piston rod of the motor is turned about its axis during its upward and downward movement. The control of the fluid supply to the motor and the exhaust from the motor is such that the rate of movement is monitored and controlled.

Abstract: A low profile fluid powered actuator particularly for valves of the type in which the valve element is rotated to open and close the flow passageway through the valve body, the actuator having a novel internal porting system, means for direct attachment of the valve stem to the shaft of the actuator, and a novel manual override for manually operating the valve.

Abstract: A position regulator is provided which is effective to control, via a control unit, a pressure medium circuit to operate a different working pressures. The regulator comprises two or more pistons dividing a common cylinder into a number of pressure chambers, the pistons being arranged for movement relative to one another. The invention provides stop means for each separate piston, each stop means being individually adjustable to produce different lengths of stroke for the respective pistons whereby the output piston rod from the cylinder is caused to adopt a number of axially determined limit positions depending upon the control pressure applied to respective pressure chambers.

Abstract: This is a multi-cylinder engine with a main piston and an auxiliary piston in each cylinder. The main piston is operated by means of compressed gas as a propellant. The auxiliary piston is operated by a hydraulic system controlled by movement of the main piston, and by a valve in the hydraulic system also controlled by movement of said main piston. The engine can have four engine cylinders. Compressed gas is sequentially applied to the cylinders for about 90.degree. rotation of the crank shaft for each cylinder. The angular degree of rotation of the crank shaft during which compression gas is delivered to the individual cylinders can be varied while the engine keeps operating. Liquid gas vaporizes to gaseous state for use in the engine.

Abstract: An operating mechanism for turning a butterfly valve axle or similar device has a piston/cylinder unit of which the piston is coupled to the axle and is provided with screw-thread means producing rotation of the axle as the piston is reciprocated in the cylinder. The arrangement of the piston/cylinder unit and coupling means is such that a longitudinally compact mechanism is achieved.

Abstract: The throttle of an engine is controlled to maintain its speed substantially constant in spite of variations of load upon it. The illustrated load comprises hydraulically operated equipment in a hydraulic system powered by a pump driven by the engine. Throttle control mechanism comprises a pair of cylinders supplied from fluid pressure in the hydraulic system. Pistons in the respective cylinders are connected by pivots with a control arm linked to the throttle control. When equipment is hydraulically operated from the hydraulic system, the fluid back pressure against the pump increases, this back pressure being greater the greater the hydraulic load. The increased load on the engine from the pump would slow the engine down if its throttle opening were to remain at its original setting.

Abstract: A carburetor has a vacuum operated diaphragm type choke control device that acts in connection with a thermostatic control to permit the carburetor choke valve to be closed during starting but provides a controlled gradual opening of the choke valve after starting. An adjustable stop member permits adjustment of the opening by limiting the extent of movement of the diaphragm. The device includes purge feature for continual self-cleaning of the device. A one-way check valve device and precision by-pass means give exact control of the choke opening.

Abstract: An actuating device comprises a cylinder of hollow cylindrical form a plurality of pistons respectively of different operational strokes slidably fitted within the cylinder and undergoing sliding displacements in a mutually unitary manner in regions where their strokes overlap and in a separate manner in regions where their strokes differ under driving force due to a working fluid supplied into and discharged from the cylinder interior through ports provided in the cylinder, a working fluid system for supplying the working fluid and having at least one changeover valve for controlling the working fluid supply into and discharge from the cylinder, the piston of longest stroke among the pistons being a driving piston, and a driven shaft coupled to the driving piston thereby to be driven by the sliding displacement thereof. The driving piston undergoes sliding displacement in a noncontinuous manner in multiple stages, whereby the driven shaft is driven in multiple stages.

Abstract: A compact rack and pinion steering gear having a hydraulically operated power cylinder concentric with respect to an internal cylindrical tube slidably supporting a pinion driven rack. The piston of the power cylinder is slidably mounted in the power cylinder and on the internal tube so that the teeth of the rack can pass through the plane of fluid sealing means adjacent to one end of the power unit to provide for a shortened rack length. The power cylinder is actuated by fluid pressure and is operatively connected to a rotary valve by one external line and by an internal passage in the valve housing. Protective flexible boot seals are provided at each end of the assembly which are pneumatically interconnected by an internal passage formed by existing structure in the assembly.

Abstract: A hydraulic actuator for producing translational movement over a long distance having two jack cylinders with pistons mounted for reciprocal movement and connected to a worm wheel through a worm gear. When a piston is driving, the worm gear acts as a rack to turn the worm wheel and when a piston is being returned to its starting position the worm gear rotates. Means are provided to alternately switch from one cylinder to the other.