Abstract: A hydraulic actuator includes a housing and with a chamber, which is arranged or formed in the housing and in which a piston is mounted movably and divides the chamber into a flexion chamber and an extension chamber. A channel for hydraulic fluid leads from the flexion chamber and the extension chamber into the housing in order to produce a fluidic connection between the flexion chamber and the extension chamber. At least one valve is arranged in the fluidic connection. The channels lead from the housing to a valve block in which the at least one valve is arranged and is fluidically coupled to the channels, and the valve block is connected to the housing.

Abstract: The disclosure relates to a valve for a fuel system having a body with at least one inlet and one outlet, the inlet fluidly connected to a pressurised fuel source in use. A shuttle is mounted within the body, the shuttle having a cavity of fixed volume and movable between a first position where fluid is permitted to flow through the inlet and is prevented from flowing through the outlet and a second position where fluid is prevented from flowing through the inlet and is permitted to flow through the outlet. A piston is configured to engage the fluid within the shuttle cavity to move the shuttle between the first and second position. A biasing mechanism biases the shuttle towards the first position and where the shuttle moves towards the second position when the fluid within the shuttle reaches a critical pressure.

Abstract: A valve for limiting differential pressure applied to a downhole tool includes a housing and a movable piston/mandrel assembly therein. In a closed position, drilling mud or other fluid may be communicated through a central bore of the valve to the tool. When the differential pressure between the central bore and the wellbore exceeds a first predetermined value, the piston/mandrel assembly moves from a first position obstructing one or more relief ports to a second position not obstructing them, thereby providing a fluid path from the central bore of the valve to the wellbore bypassing the tool and relieving the differential pressure thereacross. When the differential pressure decreases to less than another preselected value, the piston/mandrel assembly returns to its original position again obstructing the relief ports. A trigger mechanism is provided to allow more precise control and separation of the preselected differential pressure values.

Abstract: A clean out sub for use in a drill string having a tool body with a cavity for passage of drilling fluid and annular fluid circulation ports extending through the tool body, a valve spool is positioned within the tool body cavity having a reduced diameter orifice, a compression spring is located within the tool body cavity adjacent the valve spool, wherein a drop in fluid pressure created by the orifice imparts a downhole force on the valve spool and at a predetermined force overcomes a set resistive force of the compression spring thereby moving the valve spool to open the annular fluid circulation ports.

Abstract: A flow control valve for a construction machine is provided, which can constantly control a flow rate of hydraulic fluid supplied to a hydraulic actuator through a flow control spool in a spool. The flow control valve for a construction machine, having a valve body in which a supply passage communicating with a pump passage and actuator ports connected to a hydraulic actuator are formed, and a spool installed in the valve body to be shifted, includes a flow control spool shifted in the spool to variably control a cross-sectional area of a passage connected to the one actuator port if a flow rate of the hydraulic fluid that flows through the supply passage is higher than a set flow rate, a first passage formed on the spool to communicate with the supply passage and a second passage formed on the spool to communication with the one actuator port and having a cross-sectional area that is varied depending on the shifting of the flow control spool.

Abstract: A priming valve device for a beverage machine. The device includes a casing assembly including a water inlet, a water outlet, and a drain and venting portion for discharging water or air during priming and a valve assembly associated with the casing assembly. The valve assembly includes a valve member which is moveable to a closed position which closes the water outlet by elastic return when the pressure in the water inlet decreases under the elastic return pressure of the valve member.

Abstract: Bypass valve comprising a ported housing (1) and concentrical ported sleeve (2). Ported piston (3) is slidably arranged within the sleeve. Between sleeve and piston is a control system consisting of control element (5) fixed to sleeve (2) by means of plugs (7) passing through apertures (49) and holes (68). Noses (35) protrude into recesses (34) of drive element (4). Saw teeth (31) on drive element (4) interact with teeth (29) on rotatable timing element (6). Key (27) on element (6) interacts with teeth (32) on control element (5). Lower end (70) of key is abutting against ridge (67) formed on inner surface of sleeve (2). when key (27) is engaged to teeth (32), teeth (31, 29) on elements (4, 6) are misaligned. Pressure increase results in piston (3) and drive element (4) moving downward freeing key (27) from engagement with teeth (32). Teeth (31, 29) are forced into alignment with subsequent rotation of timing element (6). In this position, ports on piston and sleeve are partially aligned.

Abstract: A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into the feature. These features can include, fuel selector valves, pressure regulators, burner nozzles, and oxygen depletion sensor nozzles, among other features.

Abstract: A direct metering fuel supply system includes a fuel pump, a burn flow fuel line, a servo flow fuel line, and a servo regulator. The fuel pump is adapted receive pump commands representative of a commanded fuel flow rate and is configured, in response to the pump commands, to discharge fuel at the commanded fuel flow rate. The burn flow fuel line is in fluid communication with the pump to receive a first portion of the fuel discharged therefrom. The servo flow fuel line is in fluid communication with the pump to receive a second portion of the fuel discharged therefrom. The servo regulator is mounted on the servo flow fuel line and configured to maintain fuel flow rate in the servo flow fuel line at a substantially constant fuel flow rate regardless of fuel flow rate in the burn flow fuel line.

Abstract: A flow regulator with pressure relief combination valve is disclosed which can include a housing and a valve assembly. The housing can have a chamber and four ports. A cage, having a plurality of cross holes, is supported by the housing. A hollow spool is slidably disposed within the cage and is biased to engage the cage. A shoulder of the cage and a counterbore of the spool cooperate to interferingly retain an insert. A poppet is slidably disposed inside of the cage. The valve assembly includes an adaptor, a spring disposed within the adaptor, a guide disposed between the spring and the poppet, and an adjuster adjustably secured to the adaptor. The spring is arranged to bias the poppet against a seat via the guide. The adjustor is movable to adjust the position of the spring.

Abstract: A valve is assembled by telescoping a first body component relative to a second body component until reaching a relative position that corresponds to a predetermined valve operation parameter, such as a valve opening pressure. The first body component is then fixed with respect to the second body component at the relative position, such as by laser welding. The present invention finds potential application as a cartridge valve for a pump, such as a pressure relief valve and/or pressure reduction valve. The relative positioning control over the body components de-sensitizes valve operation from variations in valve components, such as variations attributable to geometrical tolerances.

Abstract: A safety device (1) for a fluid transmission has a diaphragm (4) which is arranged deflectably in a feed passage (8) and which has at least one through opening (2) for the fluid. A return passage (10) for the fluid from the chamber of the consumer (9) is of such a configuration and arrangement that it can be opened and closed by deflection of the diaphragm (4), wherein the diaphragm (4) is of such a configuration that, when the fluid flow in the feed passage (8) falls below a given value, the return passage (10) is opened. The pressure in a pressure chamber (9) of a consumer can be let off by the device (1) when a pump (7) is no longer conveying.

Abstract: A relief valve is interposed in an oil supply passage, and the relief valve internally includes a bottom passage for supplying oil from one oil supply passage to another oil supply passage. Since any branched oil passage for a relief valve is not required to be provided, it is possible to reduce the machining steps and machining cost. Further, since a space for disposing a branched oil passage is not required and the increase in space for disposing the relief valve can be reduced, the engine can be miniaturized.

Abstract: A bypass sub which will automatically bypass fluid flow in excess of a selected optimal flow rate for a downhole mud motor. A spring biased mandrel within a housing is driven downwardly by increased fluid flow, and driven upwardly by spring force upon decreased fluid flow, to control the alignment of a port in the mandrel with a bypass port in the housing, thereby maintaining a desired rate of fluid flow to the downhole motor.