Abstract: A piston cylinder arrangement for an air compressor including a cylinder, a connecting rod having a wrist pin receiving end, a wrist pin provided in the wrist pin receiving end of the connecting rod, and a piston provided on the connecting rod via the wrist pin and positioned within the cylinder. At least one passageway may be defined in the wrist pin to permit air to flow into the wrist pin from the cylinder.

Abstract: A two-stage, fully self-retracting, telescopic fluid actuator suitable for high speed ejection applications comprises a detent 38, 64, 26, which locks a cylinder 6 in an extended position for extension of a piston 3 therefrom. The detent is released by retraction of the piston into the cylinder again, e.g. under spring bias, so that the actuator is fully self-retracting. A locking ball 38 of the detent also serves to latch the piston and cylinder to each other for the first stage of the actuator extension. In an alternative embodiment, cam means (80, 117 FIGS. 10, 11 and 13) and plungers (90, FIGS. 10, 12, 13 and 15) perform the detent and latching functions.

Abstract: A method is provided for compensating for the flow rate of a variable capacity-type hydraulic pump such that, when a manipulation lever is manipulated, a discontinuous section, which has no change in the discharge flow rate of the hydraulic pump, is eliminated.

Abstract: The present disclosure relates to a hydraulic control circuit for crane slewing gear having directional valves arranged in work lines and controllable separately for the inflow and outflow to the hydraulic motor for the carrying out of a rotational movement of the slewing gear, wherein an inflow valve serves the control of the oil inflow from a hydraulic pump via the work line to the hydraulic motor and an outflow valve is provided via which the hydraulic motor can be relieved to the tank, wherein the work lines are each connected via at least one check valve to a common inlet of the outflow valve to relieve the hydraulic motor independently of the direction of rotation of the slewing gear via an outflow valve into the tank.

Abstract: A bicycle operating device comprises a hydraulic cylinder, a piston, and an operating unit. The hydraulic cylinder includes a cylinder bore. The piston is provided in the cylinder bore and is movable relative to the hydraulic cylinder. The piston is configured to receive a pulling force to generate a hydraulic pressure to a bicycle hydraulic component. The operating unit is configured to actuate at least one bicycle component different from the bicycle hydraulic component.

Abstract: A turbine torsional vibration damper, in particular a simple torsional vibration damper, for a vehicle, preferably for a drivetrain of a motor vehicle, having a damper part for introducing a torque into the turbine torsional vibration damper and a damper part for extracting the torque from the torsional vibration damper, wherein a pendulum mass flange of a centrifugal pendulum device is rigidly coupled mechanically with a damper part of the turbine torsional vibration damper. A converter or a torque transmission device for a vehicle, in particular for a drivetrain of a motor vehicle, wherein the converter or torque transmission device has a turbine torsional vibration damper according to the invention.

Abstract: A hydraulic control system for a machine is provided. The hydraulic control system includes a fluid reservoir and a pump motor. The pump motor is fluidly coupled to the fluid reservoir. The pump motor is configured to provide pressurized fluid and to receive fluid to provide a power output to the shaft. The hydraulic control system further includes an actuator and an accumulator fluidly coupled to the pump motor and the actuator. The hydraulic control system further includes an accumulator valve and a controller. The accumulator valve is fluidly coupled between the accumulator and the pump motor. The controller is in communication with the pump motor and the accumulator valve. The controller is configured to detect an operator command to operate the power source; determine pressure at the accumulator; and selectively move the accumulator valve to fluidly connect the accumulator with the pump motor.

Abstract: A movable diaphragm of a negative pressure type booster device includes an annular rubber diaphragm and an annular metal plate. The diaphragm is airtightly pinched by the housing at an annular outer peripheral bead portion formed at an outer peripheral edge of the diaphragm, and airtightly secured to an outer peripheral portion of a valve body, together with an inner peripheral portion of the plate, at an annular inner peripheral bead portion formed at an inner peripheral edge of the diaphragm. Between the outer peripheral bead portion and the inner peripheral bead portion, there are formed a folded portion having a curved portion toward the front and continuous with the outer peripheral bead portion at an outer peripheral area, and an annular portion continuous with an inner peripheral area of the folded portion and with the inner peripheral bead portion.

Abstract: A brake master cylinder is disclosed. A brake master cylinder comprises a cylinder body having a hollow, a piston provided to reciprocate in the hollow, and a sensor module connected on the cylinder body and configured to sense a movement according to a reciprocating motion of the piston. And the sensor module includes a sensor housing coupled to a guide hole formed parallel with the hollow of the cylinder body and having a hollow therein in a length direction, a magnet installed to be slidable through the hollow of the sensor housing, and an actuating member coupled to the piston and configured to move the magnet according to a movement of the piston.

Abstract: A piston drive assembly, including: a housing enclosing each of: a plurality of cylinders, each cylinder having an axis substantially parallel to the axis of the other cylinders; a plurality of pistons, one piston in each cylinder; a wobble plate connected to each of the plurality of pistons; a swashplate rotatably fixed to a drive shaft such that the drive shaft can rotate the swash plate or the swash plate can rotate the drive shaft, wherein the drive shaft extends through the entire length of the housing.

Abstract: A pump assembly comprises a base, a cam, a cylinder, a piston, and a shim clip. The cam rotates about a rotational axis with respect to the base. The cylinder attaches to the base, and has an inlet port and an outlet for fluid. The piston is reciprocally driven by rotation of the cam to draw fluid into the cylinder through the inlet port during a fill stroke, and to close the inlet port and pump fluid in the cylinder toward the offset during a pump stroke. The shim clip is removably insertable between the cylinder and the base to increase the distance between the inlet port and the rotational axis.

Abstract: A control system for construction machinery includes first and second hydraulic pumps connected to an engine, a swing control valve and a first boom control valve installed in a first center bypass line connected to the first hydraulic pump, a second boom control valve installed in a second center bypass line connected to the second hydraulic pump, a shutoff valve installed in a control line through which a boom raising pilot signal pressure is supplied to the first boom control valve and configured to selectively open and close the control line, and a control unit configured to electronically control the shutoff valve according to a manipulation signal, wherein the control unit closes the shutoff valve such that the first boom control valve is shifted to a neutral position when a swing operation priority mode is selected.

Abstract: A zero emission reciprocating drive pump. The reciprocating drive pump may comprise: a spool and housing assembly. The housing assembly may comprise a flange, spool housing, first chamber, second chamber, and first seal. The flange may attached to a proximal end of the spool housing. The first chamber may be within the flange. The second chamber may be within the spool housing. The spool may be substantially disposed in and reciprocally movable in the second chamber. A proximal end portion of the spool may move reciprocally into and out of the first chamber. The first seal may be positioned substantially adjacent to the first chamber and the second chamber and may contact the proximal end portion of the spool. The flange may comprise a lip that extends substantially along a width of a distal end of the first seal, such that the first seal does not pop out of place.