Abstract: An arrangement in combination with an oscillating cylinder (1), whereby the arrangement includes a working valve (10) of cylinder (1) to transmit pressure medium into cylinder (1), impulse valves (5) by means of which, by working valve is controlled, control means (4), as discs, from movable piston rod (18) to cylinder (1) outside, which can be arranged to get in several different linear positions in contact with the control means impulse valves (5) in order to produce a stroke length set for the piston rod of the oscillation cylinder. In the arrangement the impulse valves are placed sideways outside control means (4) and the required impact to be achieved from the control means (to the impulse valves (5) is moved by means of special arms (13) moved from control means (4) as an opening/closing motion of the shut-off part of the impulse valves whereby the structural length of the oscillating cylinder can be achieved essentially shorter in the cylinder back end of control means (4), (5).

Abstract: An expansible chamber pneumatic system, for example a fluid pump system, includes two or more double-acting diaphragm pumps, each with symmetrical left and right pump housings, each housing including an air chamber and a fluid chamber separated by a movable diaphragm. The diaphragms are connected for reciprocating movement in unison to pump fluid through their respective fluid chambers. Each pump includes an air valve actuated by Control air to direct Process air into one of the air chambers, simultaneously releasing used Process air from the other air chamber to thereby move the diaphragms, thereby to pump fluid. A pilot valve directs Control air to the air valve to position the air valve. The pilot valve is responsive to diaphragms reaching their travel limit in one direction to direct Control air to reverse the directions of Process air flow through the air valve to thereby reverse the movement of the pump diaphragms. Control air exhausts through the pilot valve to atmosphere.

Abstract: This invention provides an apparatus and a method for generating power from a flowing liquid. The apparatus has three main components. The first component is a control unit for selectively directing the flowing liquid to the second component, the power unit, which is responsible for generating power. The third component, a reversing unit, is used to adjust the control unit between two control unit configurations. The method involves the manner in which the liquid is passed and directed through the apparatus in order to generate power.

Abstract: A control system of a pneumatic oscillation cylinder (1) to produce the oscillating motion of a scraper (3) used in paper machines in particular. There is in the oscillation cylinder motion rod (18) motion stoppers (4), which in both wanted reversing points of the rod (18) motion open an own pressure discharge valve (5) for the said stopper in the pilot operation line (9), whereby the opening of both pressure discharge valves (5) in turns causes a reversing function in a pneumatic reversing valve (10) known as such.

Abstract: An air operated double diaphragm pump is provided with an air valve assembly which allows the valve cup to move in a rectangular pattern.

Abstract: A mechanical shift pilot valve is provided with lost motion response to accommodate slight piston reversals at travel limits to prevent a false shift signal related thereto.

Abstract: An automatic air balancer system capable of maintaining various kinds of load at a predetermined position and then moving the load at a desired speed, or applying a desired mechanical force to various kinds of object. The system includes a device for controlling the pressure at one end side of a balance cylinder to a desired level by a first pressure control valve and for controlling the pressure at the other end side of the balance cylinder to a predetermined level by a second pressure control valve, and a device for obtaining a balance pressure signal for the balance cylinder. Another signal is added to or subtracted from the balance pressure signal, and the resulting signal is input to the first pressure control valve.

Abstract: A beverage dispensing apparatus for dispensing through a nozzle a preestablished volume of a syrup and a preestablished volume of a soda to be intermixed within a nozzle prior to being dispensed into a collecting container such as a glass. The syrup side is connected to the soda side with the dispensing operation always occurring simultaneously in the preestablished ratios. The soda side includes a drive piston which is driven by the pressurized soda. The soda drive piston is physically connected to a syrup drive piston which controls the flow of the syrup to the dispensing nozzle. A single dispensing valve such as a low-power solenoid is to be used to cause the dispensing of both the soda and the syrup.

Abstract: A cylinder including a housing disposed between a head and a board, a body disposed in the housing and closely contacted with the head, a piston slidably disposed in the housing, a piston rod coupled to the piston, a valve including five rings being disposed in the head, a valve including five annular grooves being disposed in the body, an inlet being formed in the head for continuously supplying hydraulic oil into the cylinder, the piston can be urged to move in a reciprocating action without changing the supplying direction of the hydraulic oil.

Abstract: A hydraulic power and control system for operating a reciprocating hydraulic mechanism including pump means connected to the hydraulic mechanism, a continuous torque hydraulic motor, a direction control driven by the motor to sequentially direct hydraulic power fluid to separate inlets of the mechanism, an escapement for restraining the motor at 180.degree. intervals of rotation for sequentially holding the direction control at two separate positions, one for supplying one inlet and the other for supplying the other inlet of the mechanism, and hydraulic limit valves for controlling the escapement when a reciprocating member of the mechanism reaches the end of each stroke. One embodiment has two constant volume hydraulic pumps connected with the hydraulic mechanism through a reversing valve assembly operated by a scotch yoke connected with the escapement.

Abstract: A pump jack having a walking beam oscillated in a vertical arc by a hydraulic actuating cylinder that receives pressurized hydraulic fluid from a variable displacement pump. The hydraulic actuating cylinder is controlled by a hydraulic valve having an operating member mechanically shifted by a second hydraulic actuating cylinder near the end points of the pivotation arc of the walking beam to reverse the direction of movement of the walking beam during the shifting of the operating member of the hydraulic valve. The second hydraulic actuating cylinder is controlled by a second hydraulic valve that transmits pressure to the second hydraulic actuating cylinder from the variable displacement pump and reverses the flow of pressurized hydraulic fluid to the ports of the second hydraulic actuating cylinder near the end points of the pivotation arc of the walking beam.

Abstract: A fluid-operated reciprocating pump having a central housing, a pair of chamber housings attached to opposite sides of the central housing, and a pumping diaphragm in each chamber housing that separates an inner pressure chamber from an outer pressure chamber. Each outer pressure chamber is connected to an inlet manifold and a discharge manifold, and one-way check valves control the flow of the material being pumped through the chamber. The pumping diaphragms are connected together by a connecting rod that extends through the central housing. The central housing defines inlet and outlet ports for operating fluid, a reversing valve chamber, a pilot valve chamber, and passages connecting the reversing valve chamber to the pilot valve chamber, the inlet port and the inner pressure chambers.

Abstract: An oil well pump which uses a pair of vertical hydraulic pistons to raise a cross beam. The polish rod is secured to the cross beam. At the top of the stroke automatic limit switches reverse the hydraulic fluid flow to allow the polish rod to descend and complete the pumping cycle.

Abstract: A hydraulic valve mechanism for a hydraulic motor having a cylinder and a piston reciprocating therein, comprising a valve block having a valve face, a main and an auxiliary central exhaust ports, two main feed ports on opposite sides of the main exhaust port, and two auxiliary feed ports on opposite sides of the auxiliary exhaust port. A valve chest is sealed over the valve face and has aligned piston-receiving bores at its opposite ends, a chamber for pressurized hydraulic fluid between the bores and a valve-actuating piston slideable in the bores. A main D-valve and an auxiliary D-valve operable by the valve-actuating piston move within the chamber in sliding sealing engagement with the valve face. The main D-valve covers and uncovers the main exhaust port and main feed ports to control the reciprocation of the motor piston.