Abstract: A mechanism for attaching a cylinder head on a hydraulic actuator to a cylinder uses a plurality of segmented, curved rings. The rings engage curved surfaces on a plug portion of the cylinder head and on the cylinder. Shear ring retaining plates position the shear ring segments. The cylinder head has a bearing which defines a bore for rotatably connecting the cylinder head to an external structure. The cylinder head also has a neck which joins the bearing with the cylinder plug. The neck has an enlarged dimension transverse to the bore axis and cylinder axis to minimize reaction forces against the shear ring segments generated by torque exerted against the bearing.

Abstract: A high efficiency centrifugal slurry pump having satisfactory wear characteristics. The increased efficiency is obtained primarily through making the pump more narrow. Through careful control of the other pump dimensions, the increase in wear normally associated with higher efficiency narrow pumps can be reduced or eliminated.

Abstract: An improved fluid transformer which is capable of controlling the position of the operating pistons within the apparatus so that pressure equilibrium is maintained and the movements of the pistons are limited to predetermined locations within the cylinders. The transformer is capable of operating in a contaminated environment by purging unwanted fluid contamination from the internal workings of the transformer. Dynamic piston and cylinder seals are positioned such that destructive pressure forces are counteracted by opposite frictional forces during operation, thereby allowing the seals to remain effective at high pressures for long periods of time.

Abstract: An impeller wheel for feeding a medium, for example fuel, includes a plurality of vanes spaced from each other at non-uniform intervals along the periphery of the impeller wheel. To reduce tonal noise to a minimum during the feeding of the medium the vanes are distributed in accordance with the mathematical interrelations of a pseudonoise sequence.

Abstract: The invention relates to a water driven turbine. The turbine has a central drum rotatable on a horizontal shaft, the drum having a series of buckets about its periphery, the outer lips of each bucket being such as to delay discharge of water from each bucket until the bucket has a almost reached bottom dead center. The turbine has an inlet with a relatively narrow upstream opening and a relatively broad downstream opening, the inlet spreading the flow of water along substantially the length of each bucket. The turbine may be coupled to a pump which pumps water from a reservoir of water that has passed through the pump. Delivery of water can be achieved to unexpectedly high levels using the turbine/pump combination.

Abstract: The invention comprises a wall having first and second spaced surfaces, and a first plane disposed therebetween which includes first and second coplanar and orthogonal axes. A passage extends between the first and second surfaces and includes a portion having longitudinal axis disposed at an acute angle to the first plane, the first section being disposed perpendicularly to the longitudinal axis and the second section being disposed parallel to the first plane. The passage first section is generally elliptical and the passage second section is generally circular.

Abstract: A reversible turbine pump includes a pair of end walls and a side wall defining an annular pumping chamber. A turbine impeller mounted for reversible rotation in the chamber includes a rigid input shaft. One end of the shaft extends through one end wall and is sealed from the chamber. A spring biases the other end of the shaft toward the other end wall. Cooperating thrust bearing members, mounted to the other end of the shaft and the other end wall, provide a large planar area of low friction engagement therebetween. The pumping chamber has a pair of inlets, a pair of outlets and a dam. The first inlet and second outlet are on one side of the dam while the second inlet and first outlet are on the other side of the dam so that reverse rotation of the impeller pumps fluid in opposite directions through a different set of inlet and outlet. Valves associated with the inlets and outlets permit fluid flow in the desired direction and prevent fluid flow in the opposite direction.

Abstract: A Z-fold computer paper sheets unfolding/refolding carrier includes a horizontal base, a forward portion of which underlies a computer or printer housing. A supply of folded computer paper sheets is held by a first lower trough between upstanding rod stock open frame members adjacent the carrier base. A second upper trough is connected across the frame members about and forwardly of the first trough so that the second trough will overlie the rear of the computer or printer housing and be positioned to refold printed-on paper sheets exiting from the printer or computer housing. A guide ramps clips on the extends from a front top edge of the upper trough and is pivotable into a position to bridge the gap between the printer paper exit and the upper trough so as to guide the exiting paper to be refolded automatically in the upper trough. All parts other than the ramp are preferably constructed of rod stock.

Abstract: A fluid actuated cylinder is provided having a piston and piston rod combination disposed in a tubular casing having a nose end and tail end. The piston is disposed on the piston rod spaced from both ends of the rod, the outer end extending through a bearing disposed at the nose end of the casing, and a unitary member which is employed to close the tail end of the casing is provided with a bearing for supporting the inner end of the piston rod.

Abstract: A method and apparatus for reducing the intensity of the sound that accompanies a rapid decompression in a pressurized hydraulic system such as that of an injection molding machine. The apparatus includes a reduced area valve that interconnects the high pressure system with a low pressure system, with the valve connected with a tubular muffler so that high pressure fluid is initially released through the valve and into the muffler. The muffler includes a plurality of spaced apertures that face a rigid structural surface so that the high pressure fluid passing through the muffler issues from the several apertures and impinges on the rigid structure to dissipate the pressure shock accompanying decompression, and thereby modulate the intensity of the sound of decompression.

Abstract: A method for compiling and processing a plurality of differently printed groups of sheets into collated sets is disclosed, and wherein each of the printed sheets has an indicium printed thereon at a predetermined location, and with the predetermined location for the sheets of each group being different from the location of the indicia on the sheets of the other groups. A sheet from each of the groups is sequentially deposited onto predetermined spaced locations of an advancing conveyor to form collated sets, and a sensor is provided for scanning each sheet as it moves to the conveyor to detect whether an indicium is present at the proper predetermined location, and such that the sensor is adapted to identify an improperly collated sheet as well as a missing sheet.

Abstract: A propellor (10) for watercraft has a hub (11) with a pair of blades (12) with a leading portion (13) central portion (14) and trailing portion (15). The leading portion (13) of the blades are forwardly inclined relative to the hub (11) and the blades progress through the generally radial central portion (14) to the rearwardly inclined trailing portion (15), the radial height of the blades decreasing from the central portion (14) to the trailing portion (15). Both the peripheral pitch of the blades (12), and the pitch of the line of junction (16) of the blades (12) to the hub (11) increase along the propellor (10), at least from the central portion (14) to the trailing portion (15).

Abstract: A servo system includes a tubular drive shaft journalled in a housing. A screw is engaged threadably with a nut which is fixed in the drive shaft. A driven body is secured to an end of the screw so that the screw can effect a rectilinear movement with the driven body but cannot rotate. A motor can rotate the drive shaft in an infinite angle through a gearing so that the drive shaft can move in a first direction continuously. Then, an end of a fork is rotated by an abuttment element which is sleeved on the drive shaft. At this time, the other end of the fork activates a hydromechanical servo, and hence a hydraulic driving unit, to move the drive body in a second direction which is equal and a opposite the first direction. After which, the drive shaft is moved back to the original position by the driven body. The driven body is therefore moved a predetermined distance.

Abstract: A stator assembly 20 for a rotary machine 10 includes an outer case 22 and an inner case 56 which is positioned from the outer case. The inner case is formed of segments 76 which overlap and which are relatively slidable in the circumferential direction. Various construction details are developed to keep the segments in an overlapping relationship. In one embodiment, a fastener 104 and slot 102 configuration are used to limit relative circumferential movement between the segments.

Abstract: In a compressor station for boosting the pressure of gas stream being transported in a pipeline wherein the act of recompressing the gas stream to a desired pressure results in a gas temperature sufficiently high to stimulate cracking activity in the pipeline when the compressed stream gas is reinjected into the pipeline, method and apparatus are disclosed for cooling a portion of the warm compressed gas to form a cool gas stream and then controlling a division of the cooled stream to supply both a cooled recycle stream for anti-surge control and a cooled stream for mixing with the warm compressed gas for temperature control.

Abstract: A continuous web of paper which may be longitudinally folded in half is drawn around a rotating cylinder which cuts the web into pre-determined suitable lengths. Vacuum and air pressure means temporarily hold the severed portions of the web against the cylinder, but at an appropriate moment release the leading edge of the severed portion causing it to be lifted in its leading half away from the cylinder, the trailing half being retained by suction against the cylinder. The lifted leading edge folds backward against the trailing portion along a fold line, and subsequently the folded-together leading and trailing portions are released from the cylinder, transported away from the cylinder and into a stacking tray, for subsequent packaging. The cut and folded sections of the web are, at all times, held under control by a vacuum in one or more cylinders or conveyor belts until the very last moment when they are discharged into a receiving and stacking tray.

Abstract: The cylinders of the compressor each have a guide piston connected with a work piston with each being reciprocally mounted within a guide cylinder and work cylinder. In addition, seals are provided between the guide piston and the guide cylinder within a half-portion of the guide piston proximate to the work piston while a scraper ring is provided in a second half-portion of the guide piston remote from the work piston in order to meter lubricant between the guide piston and guide cylinder. Excess lubricant which is splashed from the crank case into the guide cylinder is returned via the scraper ring to the crank case.

Abstract: A valving mechanism for a balloon inflator is presented. The valving mechanism is attached to an inflator comprising a fan driven by a through-flow motor. A piston, received within a cylinder, has two bores passing therethrough, the first bore communicating with atmosphere, and the second bore communicating with a nozzle adapted for receipt of a balloon neck. When the balloon is placed on the nozzle and the piston is urged against a spring, an airstream passes through the second bore to inflate the balloon. When the balloon is removed, a spring urges the piston to a position in which the airstream passes through the first bore to atmosphere reducing the load on the motor and allowing the motor to run cooler.

Abstract: A centrifugal pump and a method of separating gas from a gas containing liquid-solids suspension. The method and apparatus of the invention is especially suitable for pumping of fiber suspensions in the pump and paper industry. The pump includes a suspension chamber having a suspension inlet and a suspension outlet, a gas chamber in fluid communication with the suspension chamber and a perforated surface located between the suspension chamber and the gas chamber for substantially preventing the solids from passing into the gas chamber.

Abstract: The present invention relates to air bleed arrangements on a compressor of a gas turbine engine. A rotor of the compressor has a plurality of stages of rotor blades, and the rotor is formed from a plurality of axially adjacent rotor discs. Two axially adjacent rotor discs define a chamber therebetween for a radially inward flow of bleed air. The rotor is provided with a plurality of apertures in rotor disc which bleed air from the compressor and supply the bleed air to the chamber. The adjacent rotor discs have opposing radially extending surfaces, and one of the opposing surfaces has a plurality of circumferentially spaced radially extending vanes and radially extending grooves which direct the bleed air radially inwardly to minimize pressure losses in the bleed air flowing through the chamber. This arrangement is not complex, is relatively easy and inexpensive to manufacture, has reduced weight and allows compressor to be manufactured by welding the rotor discs together.