Abstract: An improved vaned diffuser includes primary and secondary curved vanes. The secondary vanes are located radially outward of the leading edges of the primaries. A plurality of secondary vanes is associated with each pair of first row vanes. The camber or curvature of the two rows is opposed. The camber of the second row vanes varies in accordance to the individual vane's proximity to a pressure surface of a primary vane. Flutes may be provided in the hub and shroud walls of the diffuser.

Abstract: Pistons are discribed comprising a crown portion which also includes a piston ring belt and gudgeon-pin bosses and which crown portion comprises a ferrous allow and a seperate articulated skirt portion comprising a casting of aluminum alloy, steel or cast iron which also includes gudgeon-pin bores, the crown portion and the skirt portion having a common gudgeon-pin about which the articulated skirt portion is freely able to move relative to the crown portion.

Abstract: A pump comprising a casing (1) having interior space in which there is provided a flexible hose (2) mounted for reciprocations having one end (5) thereof which is turned inside out and secured along the perimeter to the inner wall of the casing (1), and the other end thereof which is closed so as to sealingly divide the interior space of the casing (1) into two chambers (6,7) of which one chamber (7) communicates with a source (12) of fluid being pumped and with a delivery line. In order to move the flexible hose (2) in one direction, its closed end is secured to a drum (3) operatively connected to a motor and installed in one of the chambers (6,7), and movement in the opposite direction is effected under the action of working fluid pressure built-up in one of the chambers (6,7).

Abstract: A tandem master cylinder with a booster used for a hydraulic actuator such as an automotive brake system. The master cylinder has a first and a second independently movable presser piston disposed in tandem in a first housing such that the presser pistons and the first housing define a first and a second pressure chamber. The booster has a first power piston advanced by a fluid pressure in a first power chamber formed in a second housing, to advance the first presser piston. The booster has a valve operable due to a relative movement between the first power piston, and an operating member for operating said booster, whereby the fluid pressure in the first power chamber is controlled according to an operating force applied to the operating member.

Abstract: An improved diffuser includes a plurality of vanes and an exit type throttle. The vanes maybe high solidity vanes.

Abstract: A vertical turbine pump comprises an assembly including a rotatable pump shaft, an impeller, and an impeller bowl. The assembly is removably mounted in a fluid flow diverter that directs fluid at a right angle to the axis of rotation of the pump shaft then to a path parallel to the axis of rotation of the pump shaft.

Abstract: A diffuser centrifugal compressor of a comprising a plurality of stator blades provided outside an impeller thereof, and which converts kinetic energy of fluid from the impeller into pressure energy by operation of the stator blade. The diffuser is provided with sub-blades near the inner ends of the stator blades, and intermediate blades near outer ends of and between the stator blades.

Abstract: The invention provides a piston and cylinder unit comprising a piston adapted to be displaced in the axial direction, a piston rod arranged coaxially and connected with the piston on at least one axial face thereof and which extends through an associated cylinder end cover in a sealing and sliding manner. The section of the piston rod outside the piston are provided with load attachment means. The piston rod is tubular and defines a continuous bore extending essentially from one end of such rod to the other end thereof in the axial direction. The bore is provided at least at its end sections with a female threaded section. The piston end of the piston rod is provided with a threaded part connected with the piston and in the opposite external end the male threaded section of a connecting part may be screwed with is adapted to be coupled with a load attachment means to be operated by said piston and cylinder unit.

Abstract: A fluidizing centrifugal pump for medium to high consistency fiber suspension includes a housing having an inlet channel and an outlet and an impeller operatively rotatable about the pump axis. The impeller has a working vane and at least a blade extending substantially axially from the working vane and disposed in the inlet channel for fluidizing suspension which is received in the pump inlet. A feeding vane, preferably in the form of a spiral thread, is disposed in the inlet channel, radially-outwardly from the fluidizing blade and extending along at least a portion of the axial extension of the blade.

Abstract: In a compressor rotor assembly of an axial flow gas turbine engine, wherein the rotor disk has a circumferential blade retaining slot for receiving the root of each blade of a row of blades, a ladder seal is provided between the slot and the blade platforms to limit the leakage of working medium gases from the flow path and through the slot. During engine operation, the seal moves radially outwardly into sealing relation with the underside surface of each platform. At the same time, radially inwardly extending flanges of the seal move radially outwardly into sealing relation with the sidewalls of the disk slot.

Abstract: A turbo-engine having a structure for controlling the radial gap and including an inner casing which surrounds a rotor and is assembled from shell-like parts; parts of this casing have a high thermal mass, are arranged around the rotor blades of the rotor and can be fastened in longitudinal direction (axial direction) to other parts.

Abstract: A fluid pump has a casing and a support tube mounted within the casing. A rotatably mounted drive shaft is inserted through the support tube and has a propeller mounted on one end thereof for moving fluid through the pump. A helical shaped bearing is seated between the drive shaft and the support tube for supporting the shaft and permitting fluid flow therethrough.

Abstract: A hydraulic circuit for a construction machine which operates an actuator for working machine simultaneously with an actuator for working element without degrading the operation of the actuator for working machine. The hydraulic circuit comprises a first hydraulic pump, a first directional control valve connected to the first hydraulic pump and controlling an operation of the working machine actuator, a third directional control valve controlling an operation of the working element actuator, a second directional control valve connected to a second hydraulic pump, a first pilot operating device for controlling an operation of the first directional control valve and a second pilot operating device for controlling an operation of the third directional control valve.

Abstract: A mail processing machine which includes a folder bar, a creasing element and pressing roller assembly for maintaining an array of sheets in a folded over form in a reduced height stack for insertion into mailing envelopes. A table supports the lower surface of sheets to be processed by the machine, pusher bars engage and intermittently advance the sheets downstream of said machine. The folder bar extends transversely of the downstream direction and is arcuately movable to impart a fold to the array of sheets. A creasing element moves up to engage the lower surface of the stack, and two opposed pressing rollers, each with its own drive mechanism, are resiliently urged together to apply a pressing force to the array of sheets passing between the rollers.

Abstract: A fluid actuator having a piston, a pair of springs, a pair of cams, and a pair of cam followers mounted in a housing. A normally open valve is coupled to the actuator output shaft for actuation. When fluid pressure is applied to the piston, the springs are compressed, and the cam followers are moved down to permit the cams to rotate away from each other, thereby reducing the force on the actuator output shaft and permitting the valve to open. When fluid pressure is removed from the piston, the springs expand pushing the piston and the cam followers up, thereby rotating the cams toward each other and forcing the actuator output shaft against the valve stem to close the valve.

Abstract: A pitot pump assembly including a rotating drum 12 having a central bore 14 and a cavity 20 between its two axial ends and at least one radially extending opening 22. A stationary shaft 24 is inserted within the bore 14 and includes a plurality of fluid passages 26. The shaft 24 has one or more bearing surfaces 28 and sealing surfaces 30 between the shaft 24 and the rotating drum 12. A unitary pitot sub-assembly 32 is inserted through the radial opening 22 of the rotating drum 12 and has one or more radially extending pitot tubes 36 in which to receive fluid from within the cavity 20 of the rotating drum 12. A sleeve 48 is disposed on the rotating drum 12 for sealing the opening(s) 22 and an outer housing 52 is secured to the stationary shaft 24 and encases the rotating drum 12.

Abstract: A blade of a compressor rotor has its tip provided with at least one discontinuous sealing lip formed by two half lips arranged on opposite sides of the blade asymmetrically with respect to a transverse sectional plane of the blade tip, either with or without overlap of the half lips in the direction of the chord of the blade.

Abstract: Signature gathering machine in which signatures are extracted by an extracting cylinder successively from a hopper, released at a register gauge, opened by grippers on opposed opening cylinders and then those grippers are opened to drop the signature onto a saddle conveyor; wipers rotate with the extracting cylinder and are actuated in timed relation to arrival of the signature at the register gauge so as to force the free edges of the signature into the space between the opening cylinders.

Abstract: A brake unit having a hydraulic brake booster and twin master cylinders in a common housing. The brake booster comprises a drive cylinder between the master cylinders which can be subjected to the outlet pressure of a brake valve of the brake booster which supplies an outlet pressure proportional to the pedal travel. A compensating cylinder, which jointly executes the strokes of the drive-cylinder piston and can likewise be subjected to the outlet pressure of the brake valve transmits the actuating forces generated by the drive cylinder to the pistons of the master cylinders via a rocker articulated pivotably on the compensating piston. The effective piston surface of the compensating cylinder is somewhat larger than that of the drive piston.

Abstract: A hydraulic drive system for a machine element performing in one work cycle a sequence of motions comprising a rapid feed motion, a working stroke under load and an oppositely directed rapid-return motion. The drive element includes a hydraulic cylinder having three working surfaces A.sub.1, A.sub.2, A.sub.3. Motion control is effected by an electro-hydraulic follow-up control valve with a pre-setting device controlled by a stepping motor and a mechanical actual-value feed-back device. During rapid feed motion, the relatively small working surface A.sub.1 is subjected to the output pressure of the follow-up control valve only, while during the working stroke the pressure acts additionally on the working surface A.sub.3. The rapid-return movements of the piston of the cylinder are controlled by applying pressure to the working surface A.sub.2, or by relieving pressure from the two other working surfaces A.sub.1 and A.sub.3.