Abstract: A hydraulic valve having a body defining an inlet and an outlet. A motor is supported by the body and operates a shaft extending through an interior of the body, the shaft terminating in a gate. A spring is supported within the housing and influences the gate in an open position to permit fluid flow between the inlet and outlet. Upon the occurrence of a pressure differential resulting from a fluid flow through the inlet exceeding a biasing force of the spring, the gate is caused to displace against a valve seat communicating the inlet with the outlet in order to interrupt fluid flow in a standby mode and to define a closed position. The motor operates in a further throttling mode to linearly and incrementally displace the gate between the open and closed positions said outlet and in order to adjust flow through the outlet.

Abstract: A vent valve opens to provide a fluid path from a regulated pressure port to a vent port, a supply valve opens to provide a fluid path from the regulated pressure port to a supply pressure port. A control piston has a linear cam profile with a vent cam that opens the vent valve and a supply cam that opens the supply pressure valve.

Abstract: A normally closed subplate mounted valve has a lower valve seat defining a function port, an upper seat, and a sleeve between the upper seat and the lower seat. The sleeve defines a first port. The poppet is movable within the sleeve to selectively seal against the lower seat in a piloted position or to seal against the upper seat in an offset position. The poppet blocks the first port when the poppet is positioned in an offset position. A piston shaft is affixed to the poppet for moving the poppet into the piloted or offset position. A spring biases the poppet in the offset position for preventing fluid flow into the first port. A pilot port supplies pressure for sliding the piston to compress the spring and to move the poppet away from the offset position to the piloted position so that fluid may flow into a supply port and out of the function port. A second port may be provided in the sleeve. The ports may be selectively configured for supply or vent. Components may be joined with retainer springs.

Abstract: A hydraulic boosting and regulating system includes an intensifier circuit and a regulator and employs low leak, low crossover valves.

Abstract: A valve assembly includes an upper sleeve, a lower sleeve, and a poppet contained between the upper and lower sleeve and operable between a first and second position. The poppet includes a first end, a second end, a side, a central cavity, and a hydraulic port. The second end is spaced from the first end, the side is adjacent one of the first end and the second end. The central cavity extends from the first end of the poppet towards the second end of the poppet. The hydraulic port extends from the side of the poppet into the central cavity. The hydraulic port is configured to receive hydraulic fluid at a first flow rate from the supply port and to supply hydraulic fluid to the central cavity at a second flow rate less than the first flow rate.

Abstract: Systems, methods, and apparatuses for a regulator are provided. The regulator includes a reducing valve, an accumulator, an accumulator line, and a regulated line. The reducing valve is operable between a closed position and an open position. The reducing valve includes a first opening inlet configured to receive fluid to bias the reducing valve towards the open position, a first closing inlet configured to receive fluid to bias the reducing valve towards the closed position, and a first spring configured to transmit a first spring force to the reducing valve to bias the reducing valve towards the closed position. The accumulator is configured to store fluid at a first pressure. The accumulator line is configured to receive fluid from the accumulator and to provide the fluid to the first opening inlet at the first pressure. The regulated line is connected to the first closing inlet at a second pressure.

Abstract: Systems, methods, and apparatuses for a valve assembly are provided. The valve assembly includes an upper sleeve, a lower sleeve, and a poppet. The lower sleeve is coupled to the upper sleeve. The lower sleeve includes a bottom face, a side, a supply port, and a pilot port. The supply port extends through the side of the lower sleeve. The pilot port extends through the bottom face of the lower sleeve. The poppet is operable between a first position and a second position. The poppet is contained between the upper sleeve and the lower sleeve. The poppet includes a first end, a second end, a side, a central cavity, and a hydraulic port. The second end is spaced from the first end, the side is adjacent one of the first end and the second end. The central cavity extends from the first end of the poppet towards the second end of the poppet. The hydraulic port extends from the side of the poppet into the central cavity.

Abstract: Systems, methods, and apparatuses for a regulator are provided. The regulator includes a reducing valve, an accumulator, an accumulator line, and a regulated line. The reducing valve is operable between a closed position and an open position. The reducing valve includes a first opening inlet configured to receive fluid to bias the reducing valve towards the open position, a first closing inlet configured to receive fluid to bias the reducing valve towards the closed position, and a first spring configured to transmit a first spring force to the reducing valve to bias the reducing valve towards the closed position. The accumulator is configured to store fluid at a first pressure. The accumulator line is configured to receive fluid from the accumulator and to provide the fluid to the first opening inlet at the first pressure. The regulated line is connected to the first closing inlet at a second pressure.

Abstract: A saddle bearing liner (30) for a variable displacement axial piston pump (10) includes two axially-spaced apart bearing surfaces (62, 64) with an offset central section (54) integrally joining them. A hollow projection (80) extends radially from the convex side of the pressure bearing section (50) and is received with a recess (82) of the housing (12) to locate the liner (30). The liner (30) has radially extending ledges (70, 72) which mate with surfaces (74, 76) of the housing (12) to inhibit skewing of the bearing liner (30) relative to the axis of the bearing surfaces (62, 64). The projection (80) is hollow and opens to the bearing surface (62) so that presurrized fluid from the housing (12) can be injected between the bearing surface (62) and the mating surface (22) of the swashblock (20). The projection (80) also prevents the liner (30) from rotating about the bearing surface axis.

Abstract: The invention involves improvements to an axial piston fluid device of the type having a housing with a central cavity and a valve plate end, a shaft journaled adjacent its inner end in a bushing mounted in a bore in the valve plate end, and a cylinder barrel surrounding the shaft and rotatable therewith in the cavity and against the valve plate end. The invention utilizes a bushing which has a slot intermediate its ends and the valve plate bore has axial extending recesses leading to and away from the bushing slot. The cylinder barrel and valve end have a series of fluid passageways leading from the cavity to the bore and from the recesses to the space between the cylinder barrel and shaft and then back to the cavity.

Abstract: A variable displacement axial piston device has a movable swashblock, the front face of which is engaged by shoes pivotally mounted on the end of pistons operating in a plurality of cylinders formed in a cylinder barrel. The rear of the swashblock has a pair of arcuate bearing surfaces and a support is provided in the device for such bearing surfaces. A pair of arcuate bearings are disposed between the support and the swashblock bearing surfaces. At least the one swashblock bearing surface that is opposite the high pressure port of the device has a continuous groove that faces the respective bearing. A passageway is formed internal of the swashblock and terminates in the groove. An opening with an orifice is provided in the front face of the swashblock leading to the passageway from a position that is axially aligned with the one bearing surface and in the path of the shoes as they pass over the front face of the swashblock.

Abstract: A constant speed hydraulic drive comprising a variable displacement hydraulic pump controlled to maintain a constant flow of hydraulic fluid even though a prime mover therefor is subject to speed variations. The constant flow rate delivered by the hydraulic pump is at a rate sufficient to drive a load hydraulic motor at a predetermined speed when the load hydraulic motor is subject to any given load. A pilot operated relief valve proportionally bleeds hydraulic fluid from ahead of the hydraulic motor in accordance with the speed and load of the hydraulic motor.

Abstract: This invention relates to a tapered finishing reamer having an overall taper of about ten degrees and having only two teeth diametrically opposite one another. Each tooth is formed to present a negative cutting angle on the order of ten degrees leading a diameter extending between the apexes of the two teeth. The tapered body of the reamer between the two teeth being cylindrical in cross-section and forms guiding surfaces of slightly less diameters than the diameter through the apexes of the teeth.

Abstract: Coupling joint seals, for oil well head high pressure control equipment particularly for the assemblies of riser tubes thereof on wireline equipment, have the coupling containing a seal constructed and arranged to permit the use of a rigid non-extrusion ring, preferably of yellow brass, as a retainer or back up ring as an element of the seal. The arrangement includes a groove cut into a cylindrical surface of a coupling member that enters an annular slot therein that shall contain the seal means to be disposed therein. The rigid non-extrusion ring is screwed or threaded through the groove and into the annular slot.

Abstract: A high pressure check valve for an intensifier cylinder and secured in the end of the cylinder so as to reduce the stress on the check valve due to cyclic loading.

Abstract: A variable displacement axial piston hydraulic pump or motor having a rotatable cylinder barrel with working pistons suitably connected for thrust engagement with the thrust face of a cradle supported for pivoted movement in one plane within a housing for the pump or motor to effect reciprocal movement of the working pistons in accordance with the tilt of the thrust face. The cradle has a rigid lever arm extending rearwardly of the face. A coupling pin is journalled in the lever arm; and a free end of the coupling pin has two flat sides fitted in an annular groove of a displacement control piston; whereby linear movement of the control piston transmitted through the coupling pin as the free end of the coupling pin slides laterally within the annular groove of the control piston to accommodate the angular movement of the cradle. And stops within the housing abut either side of the coupling pin intermediate the ends thereof to limit maximum displacement.