Abstract: In a cooling air supply system for a rotor, cooling air is supplied from cooling air nozzles to an annular cooling air passage formed around the rotor shaft. The cooling air nozzles are formed as straight air passages having circular cross sections. The straight air passages disposed on a stationary annular nozzle member surrounding the rotor shaft. Since the nozzles are formed as straight air passages having circular cross sections, the nozzles can be manufactured accurately at low cost by machining the annular nozzle member. Further, since the freedom for the arrangement of the nozzles increases by using the straight air passages, the nozzles can be arranged in such a manner that cooling air leaving the nozzle flows into the cooling air passage around the rotor shaft without changing its flow direction. Thus, the pressure drop in the cooling air caused by changing flow direction can be largely reduced.

Abstract: A hydraulic line slit 20 formed in a valve body 50 of a flow distribution valve 5-1, a control chamber 70, and a hydraulic line 31-1 are connected to a signal transmitting hydraulic line 9. A lap portion 32 is formed in the hydraulic line slit 20, the lap portion 32 having a check valve function with a lap amount X when the valve body 50 is in a cutoff position. A 2-position, 3-way valve 11 is disposed in the hydraulic line 31-1. The valve 11 connects the control chamber 70 of the flow distribution valve 5-1 to only the signal transmitting hydraulic line 9 when an external signal F is not applied, and to both the signal transmitting hydraulic line 9 and a lower-pressure detecting hydraulic line 35, which is connected an outlet passage 5b of a flow distribution valve 5-2 on the side of a hydraulic actuator 3-2, when the external signal F is applied.

Abstract: A connecting rod assembly for connecting high pressure pumps to mechanical or hydraulic pump drives has been developed. This assembly comprises a crosshead incorporating a novel design which slides on two parallel tie-rods in order to ensure precise and stabile support for moving pump components attached to the crosshead. Further, the crosshead utilizes a single centrally located drive bearing of spherical design to eliminate any torques which could otherwise be translated into the driven equipment (pumps).

Abstract: In a cooled blade for a gas turbine, a cooling fluid, preferably cooling air, flows for convective cooling through internal cooling passages located close to the wall and is subsequently deflected for external film cooling through film-cooling holes onto the blade surface. The fluid flow is directed in at least some of the internal cooling passages in counterflow to the hot-gas flow flowing around the blade. Homogeneous cooling in the radial direction is achieved by providing a plurality of internal cooling passages and film-cooling holes arranged one above the other in the radial direction in the blade in such a way that the discharge openings of the film-cooling holes in each case lie so as to be offset from the internal cooling passages, and in particular the discharge openings lie between the internal cooling passages.

Abstract: A hydraulic circuit includes first and second pumps, a first discharge passage receiving hydraulic fluid discharged from the first pump and communicating with a main gallery, a second discharge passage receiving hydraulic fluid discharged from the second pump and communicating with an actuator, a communication passage ensuring communication between the first and second discharge passages, and a relief valve arranged with the communication passage to be opened at a predetermined pressure for the second discharge passage.

Abstract: A hydrostatic transmission may be placed in a free-wheeling state by rotating a bypass actuator that lifts the motor from a motor running surface whereby hydraulic fluid flows into a transmission cavity. A bypass arm connected to the bypass actuator and to a bypass rod may be used to engage and disengage the bypass actuator via operation of the rod. Further, a bypass latch may be used to lock the bypass arm in an engaged position whereby the bypass actuator is engaged and the transmission is disengaged. The bypass latch arm is preferably linked to the brake pedal whereby actuation of the brake pedal disengages the bypass actuator through operation of the latching arm. The system may be designed to provide dynamic braking through transmission resistivity prior to application of a brake force to the axles or wheels by unlatching the bypass arm prior to actuating the brake arm.

Abstract: A vacuum pump for pumping gas from a pump inlet to a pump outlet, comprising a rotor and a stator body in which the rotor is adapted for rotation and including at least two molecular drag stages each comprising adjacent stationary and rotating Holweck cylinders attached to the stator body and the rotor respectively and with a threaded upstanding helical flange positioned therebetween which is attached either to the stationary or to the rotating cylinder wherein the molecular drag stage closest to the pump inlet has the threaded flange on its rotating cylinder and the subsequent molecular drag stage or stages has the threaded flange on the stationary cylinder.

Abstract: A vertically oriented hydraulic power unit for an elevator drive includes an outer tank for drive fluid and an inner tank for fluid used to submerge and cool a motor, the fluids being exchangeable to maintain temperature in the inner tank at or below a specified maximum temperature. Oil returning from an elevator piston is fed into said inner tank to keep the inner tank sufficiently cool.

Abstract: A brake handle device for a hydraulic brake assembly includes a barrel received in a housing and having an outer peripheral depression for forming an annular chamber between the barrel and the housing. A plunger is slidably received in the barrel and has an outer peripheral recess for forming an annular space between the plunger and the barrel. The barrel has two apertures for communicating the annular chamber and the annular space. The housing has a cavity for receiving a spring-biased panel and for regulating the oil when the oil is expanded.

Abstract: Water-raising pump for drawing water in a ground water table, which pump comprises a tube connecting the surface to the water table to be pumped, a rod carrying the pistons, which is connected to a drive mechanism installed at the surface for imparting to the rod a reciprocating pumping motion. The mechanism comprises: two identical toothed wheels (7, 8), mounted on axes (72, 82) that are symmetrical relative to the trajectory (ZZ) of the rod (3) carrying the pistons, meshing in each other so as to rotate in opposite directions, a motive unit (9, 10, 11) connected to at least one of the wheels (7) to drive it in rotation, two identical connecting rods (12, 13) each connected to the head (14) of the rod (3) and to a point of articulation borne by each toothed wheel (71, 81), in symmetrical positions, in order to be driven in symmetrical motions relative to the trajectory (ZZ) of the rod (3) in order to guide and drive the rod and its pistons.

Abstract: The invention provides an improved fluid motor powered lift system having a valve arrangement for reducing or interrupting the fluid flow supplied to the motor when the pressure in the lift system exceeds a predetermined pressure. A valve arrangement is provided to shut-off or throttle back the fluid supplied to the fluid motor when the fluid pressure in the lift reaches a predetermined level. When the pressure in the lift system exceeds the predetermined level, pilot pressure is supplied to an automatic shut-off valve, and this in turn reduces fluid flow to fluid air motor thereby reducing or preventing pump pressure.

Abstract: An LUDV-circuit for controlling at least one of a lower-load consumer and a higher-load consumer is disclosed, wherein a metering orifice and a downstream pressure compensator for maintaining constant the pressure drop across the metering orifice constant are associated with each consumer. The pressure compensator of the lower-load consumer is associated with a bypass channel capable of being controlled open, whereby the pressure compensator of this consumer may be bypassed.

Abstract: An impeller clearance adjustment system provides for the desired clearance between an impeller and suction housing irrespective of the amount of torque applied to the bolts of the adjustment system. A bearing housing has a plurality of generally evenly spaced apart threaded first openings while a bearing frame has a plurality of threaded second openings registerable with the first openings. A twinsert is threadably received within each of the plurality of second openings. An adjustment bolt, having an opening in its central axis, is threadably inserted into each of the first openings and abuts a face of a twinsert. An attachment bolt is inserted through each adjustment bolt's opening and is threadably received within the respective twinsert. Once the impeller clearance is set, each attachment bolt is tightened thereby maintaining the set impeller clearance.

Abstract: A spindle device can prevent a drive fluid for a turbine rotor from being leaked to a gap between a fixed housing and a spindle which is rotatably supported on the housing as much as possible and hence, the spindle device can efficiently make use of the supplied drive fluid and can increase the rotational torque of the spindle. The spindle device rotatably drives the spindle using the turbine rotor. The rotation of the spindle to the housing is supported using a radial dynamic pressure bearing. Further, supply holes and receiving holes for the drive fluid for the turbine rotor are formed such that these holes penetrate the radial dynamic pressure bearing in the radial direction.

Abstract: A cavity vertical turbine includes a rotatably driven electric generator or air compressor, a drive shaft operably connected to the electric generator or air compressor to cause rotation thereof, a first member having a cavity vertical surface and being connected to the shaft such that the cavity vertical surface opposes the drive shaft such that the cavity surface opposes the drive shaft in a spaced relation therefrom, a second member having a cavity surface and connected to the shaft such that said cavity surface opposes the drive shaft in a spaced relation therefrom, wherein the cavity surfaces are further characterized to be in opposing partially overlapping relation to one another and a device for suspending the members in a manner which permits freedom of movement between an operable and inoperable position by virtue of forces of air current directed at the members.

Abstract: A variable capacity swash plate type compressor (10) incorporates an anti-rotation structure (60) formed on each piston (52). Each piston (52) is disposed in a cylinder (14) of a cylinder block (12). The cylinder block (12) is disposed in a crankcase (18). The anti-rotation structure (60) restricts rotation of a piston (52) within a cylinder (14) by cooperating with an inner surface of the crankcase (18).

Abstract: A ceiling fan structure including a housing, a motor casing, a fixing disc and multiple vanes. A motor is installed in the housing and enclosed in the motor casing. The motor casing is formed with multiple thread holes on a periphery of bottom face of the motor casing. Multiple vanes are pivotally disposed on bottom side of the fixing disc via vane brackets. The fixing disc is formed with multiple through holes corresponding to the thread holes. A bolt is passed through each through hole for locking the motor casing with the fixing disc and spacing the motor casing from the fixing disc by a certain distance, A spring is fitted on each bolt within the distance for absorbing swinging force exerted onto the vanes during rotation of the ceiling fan.

Abstract: The disclosed helicopter power transmitting apparatus can transmit rotational torque of one engine input to a largediameter gear (3) linked with a main rotor driving shaft (2) through a pair of gear trains securely and uniformly.

Abstract: An air seal is illustrated as used in a gas turbine engine. The seal includes at least a seal substrate, a relatively dense, erosion resistant ceramic layer applied over the bond coat, and an abradable ceramic layer applied in a local area over the dense ceramic layer. The abradable ceramic interacts with a component moving relative to the seal, such as a turbine blade that moves relative to the seal, and cooperates with the moving component to provide sealing and thermal insulation.

Abstract: The system controls the position of a pneumatically operated valve using an electrical control signal from a controller. A pilot circuit of the system has multiple piezo valves that are subject to electrical signals from the controller to provide pneumatic output signals to a volume booster circuit of the system. Relatively small volume pneumatic pilot signals from the piezo valves are used to determine the opened or closed state of higher volume valve assemblies of the booster circuit which connect or disconnect the actuator of the valve to be operated with a source of pressurized gas. Both the piezo valves and the booster valve assemblies are subjected to gas at the same operating pressure, but the surface area of pistons in the booster valve assemblies exposed to the piezo valves is substantially larger than the surface area of the pistons exposed to operating pressure such that the pneumatic signals shift the pistons even when pressure is the same on both sides thereof.