Abstract: A device is used in a hydraulic machine of the type which comprises a runner or rotor with a hub body and vanes or blades which are rotatably journalled in bearings in the hub body, and which has at least one chamber which communicates with the bearings. The device comprises an oil supply to the bearings and elements for leading oil away from the chamber at pace with the supply of oil, such that the chamber is caused to contain an essentially constant volume of oil, which is smaller than the total volume of the chamber, which oil volume is pressed towards the peripheral wall of the chamber by the centrifugal force at the rotation of the runner.

Abstract: An agitator includes a drive motor having a shaft projecting through an axial end of a housing and having connected thereto a propeller boss. The propeller boss and housing define a circumferential gap spanned by a circumferentially extending radially outermost gap covering and sealing portion of a deflector ring. The deflector ring includes a radially innermost ring mounting portion located in the circumferential gap. The deflector ring is preferably made of elastomeric material and an outermost circumferential surface of the deflector ring is exteriorly convexly curved in the form of an aerofoil converging axially toward ends of sealing lips of the deflector ring gap covering and sealing portion.

Abstract: A propulsion blade retraction and pitch control apparatus includes a hollow primary drive shaft, a pitch control gear assembly mounted, within a propeller hub, to the primary drive shaft, a radially spaced array of pitch control stub shafts mounted to, in co-operation with, the pitch control gear assembly, so as to be selectively rotatable about corresponding pitch control shaft longitudinal axes upon selective actuation of the pitch control gear assembly, propulsion blades pivotally mounted to the pitch control stub shafts at ends of the pitch control stub shafts radially distal from the pitch control gear assembly, one or two coaxial nested pitch control drive shafts, rotatably co-axially journalled so as to be nested within, and co-axial to, the hollow primary drive shaft, said pitch control drive shaft or shafts selectively rotatable to actuate the pitch control gear assembly.

Abstract: A Kaplan turbine or similar hydraulic machine has a hub body (1) fixed to the turbine shaft with radial blades attached to the hub body. The blades are fitted with oil lubricated bearings in the hub body. A sealing arrangement for the oil system has first (60) and second (61) circumferential sealing members with a circumferential space (65) between the first and second sealing members (60, 61). High pressure water from a water source is directed into the circumferential space (65) via a connecting channel (64) to block the lubricating oil from leaking into the working fluid.

Abstract: A propeller blade retention assembly for use with a propeller having a hub rotatable about a propeller axis, is disclosed. The assembly includes a blade receiver for mounting the blade to the hub and an internal surface of a hub arm for interfacing the receiver with the hub. The receiver is positioned in the hub arm and is non-integral with the blade and the hub arm internal surface. A retention mechanism is used for retaining the blade receiver to the hub arm while allowing relative rotatable motion therebetween. A preload device is provided for preloading the retention mechanism prior to centrifugal loading during propeller blade operation. The blade is separable from the blade receiver without disturbing the operability of the retention mechanism.

Abstract: A controllable-pitch propeller for a sport-type watercraft has a push rod eccentrically connected to each blade displaceable in a bore of the propeller hub. The push rod is sealed with respect to the end of that bore by a multifold bellows whose radial flange is clamped by a cap of an axial flange of the housing in which the bore is provided.

Abstract: The invention relates to a rotating machine part having, in particular, a flat housing or base with an essentially cylindrical outer wall or with symmetrically distributed projections which are arranged in particular in the form of a star, in particular a rotor (1) of a cycloid propeller, the cylinder axis or rotor axis being the same as the rotation axis and the machine part or housing rotating in an atmosphere or a medium which is able to transmit heat to a sufficient extent to produce a required cooling effect on the machine part or housing or in its interior.

Abstract: An improvement in a variable pitch propeller to allow replacement of propeller blades under water without water intruding into the mechanism in the propeller hub and without a substantial quantity of oil leaking to the surrounding water. The propeller comprises a number of turnable propeller blades (2) which are each removably attached to a rotatable crank disk (3) and for each propeller blade there is provided a first seal (5) between the hub (1) and the propeller blade root (2a), a second seal (6) between the hub (1) and the crank disk (3) and a by-pass valve (7) passing the second seal (6). the valve (7) is spring biased to remain in a closed position when the propeller blade (2) is removed. When the propeller blade (2) is secured in place the first seal (5) is operative and when the propeller blade is removed, the second seal (6) is the operative one together with the valve (7).

Abstract: A marine propulsion device comprising a propulsion unit including a gearcase having a cylindrical inner surface centered on an axis, a propeller shaft which is located inside the inner surface, which is supported by the gearcase for rotation about the axis, and which has a rearward end adapted to have mounted thereon a propeller, and an annular oil seal extending between the propeller shaft and the inner surface, and a mechanism for protecting the oil seal from foreign matter, the mechanism including an annular member fixed on the propeller shaft, located between the oil seal and the rearward end of the propeller shaft, and spaced from the oil seal, the member having a generally circular outer surface spaced closely adjacent the inner surface and having a beveled surface portion facing the rearward end of the propeller shaft.

Abstract: A protected, but unsealed rotor bearing for flowmeter turbine rotors and the like has an annular shoulder protruding axially from the rotor in concentric relation to the rotor axis in a manner that defines a cavity protruding axially into the rotor. An elongated bearing body with a cylindrical peripheral surface is mounted in a supporting frame and protrudes axially into the cavity. An axle on which the rotor is mounted protrudes into a bore in the bearing body such that the bearing interface is between the surface of the axle and the surface of the bore in the bearing body. A ball in the bore between the bearing body and the axle bears axial thrust. The peripheral surface of the bearing body does not contact the annular shoulder, but a face on the annular sholder that extends radially outward from adjacent the peripheral surface of the bearing body acts as a centrifugal flinger to dynamically divert contaminant particles away from the bearing surfaces.

Abstract: A spillage oil drain from the volume between a conical hub and a disk is comprised of a radial slot in the edge of the hub flange where it abuts the disk.

Abstract: A controllable pitch marine propeller comprises a hub body carrying a plurality of propeller blades for rotation about pivot axes disposed radially of the hub axis, a force rod extending into the hub body from the propeller shaft, and a cross-head affixed to the force rod and coupled to each propeller blade by a pin and slideway such that the propeller pitch is controlled by fore and aft movements of the force rod. The hub body has a tubular mount spigot that receives the aft end of the shaft with the shaft and mount spigot terminating aftward of the pivot axes of the blades. The cross-head is generally cup-shaped, having a base portion affixed to the force rod aftward of the pivot axes of the blades and a tubular portion extending forewardly from the base portion and surrounding aftward portions of the spigot in telescoping relation. The cross-head in supported in plain bearing relation by the hub body for fore and aft movements.

Abstract: A fluid transfer seal for transferring hydraulic fluid between differentially rotatable components, such as between the stator and rotor of a gas turbine engine. A circumferential channel is formed about the stator with a fluid passageway connecting the channel to a fluid supply reservoir in the stator. An annular seal carrier is positioned within the channel such that opposite sides thereof are in sliding contact with sidewalls of the channel for inhibiting fluid escape around the carrier. Radially outer and inner circumferential slots are formed on the carrier with apertures through the carrier for coupling fluid between the slots. Outer circumferential grooves are formed around the carrier on opposite sides of the outer slot. Seal rings are positioned in the grooves in contact with the carrier and the rotor for preventing fluid escape along the carrier-rotor interface.

Abstract: An oil dam consists of a pair of parallel plates, each plate having a hole passing therethrough, each hole being disposed at a radial position within each respective plate such that the oil may flow through the holes when the dam is rotating. The hole in one plate is offset circumferentially from the hole in the other plate so that both of the holes are not below a surface of the oil flow when the dam is in a stationary position.

Abstract: In an axial blower, a plurality of blades are disposed around a hub and each blade is supported on a respective strut which is rotatable in a pair of radially separated bearings. An axially displaceable disk in the hub is connected with the blades for rotating them. The drive shaft for the rotor is hollow and delivers oil to the disk which in turn delivers it to the rotation levers of the struts. The oil moves successively to the bearings radially outward of the disk and accumulated oil is collected by a scoop at the radially outer bearing. The collected oil is delivered to a collection chamber and is recirculated by a pump back to the hollow shaft. An additional cooling circuit may be provided.

Abstract: A wind turbine with two rotors equipped with wings, which are mounted on horizontal shafts rotatably mounted in a bearing unit. The rotors are displaced 180.degree. in relation to each other. The bearing unit is connected to a rotatably mounted vertical output shaft with the rotor shaft projecting substantially radially on diametrically opposite sides of the output shaft, gear wheels of the rotor shafts engaging a gear ring mounted coaxially with the output shaft stationarily in relation to the output shaft. A second pair of rotors of the same type as the first pair are mounted on shafts which are rotatably mounted in the bearing unit perpendicularly to the shafts of the first pair of rotors and are displaced 180.degree. in relation to one another and 90.degree. in relation to the first pair of rotors. A gear train interconnects the rotors for position-synchronized rotation.

Abstract: Several embodiments of propeller constructions employing an improved fish line and weed cutting device that extends into a recess formed in the lower housing. In each embodiment, the cutting member is disposed radially inwardly of the recess to define a gap and one or more projections extend outwardly from the cutting member to fill the gap and define a narrow area that will prevent the entry of fish lines into the opening of the lower unit that defines the recess.

Abstract: An axial flow machine particularly a blower, has rotor blades external to a housing and each blade is supported by a respective strut which is rotatable about its respective strut axis to adjust the orientation of the blades. A respective crank-like swing lever attached to each strut is movable to rotate the strut. Each swing lever has a slide block at the end thereof which is carried in the annular peripheral groove of an axially movable adjustment part. As the adjustment part is displaced axially, the swing levers rotate in their slide blocks. The invention is concerned with lubricating the rotation of the swing levers in the slide blocks. The adjustment part is at least partly inundated by an oil supply held in the housing. The adjustment part is scoop shaped. The rim of the adjustment part includes an annular peripheral wall on the exterior of which the peripheral groove is defined.

Abstract: A redundant rotor blade retention system is disclosed. A secondary load path is provided in the event the primary load path of the rotor blade retention system fails. Both the primary and the secondary load path permit rotation of the rotor blade about its pitch axis. The rotor blade is connected to a shaft which forms a portion of the rotor hub. The shaft is pivotally connected to the housing of the rotor hub by a tie-bar, tension-torsion strap, or the like. Flanges which form an integral part of the hub housing and the shaft overlap and are spaced apart from one another. In the event the tie-bar or tension-torsion strap fails, the flanges come in contact with one another and act as a secondary load path. Lubrication is provided so that relative motion about the rotor blade pitch axis may occur between the two flanges thus permitting rotor blade pitch motion.

Abstract: According to the present invention, in an adjustable blade shaft bearing in an axial-flow fan with adjustable blades, the adjustable blade shaft bearing or a thrust bearing is packed with an annular cover having a U-shaped cross-sectional configuration and a lubricating oil is sealed in the annular cover.With the above construction, under the centrifugal force produced by the rotation of the axial-flow fan, the lubricating oil can be forced to act always on the rolling surface. Moreover the devices and machining of parts required in the conventional forced lubrication systems may be eliminated so that the construction may be simplified.

Abstract: In an axial fan having an impeller with settable blades and wherein the root end of each blade connects, via a bearing permitting rotation of the blade, to the outer end of a blade-attachment shaft extending substantially radially relative to the impeller, the blade-attachment shaft is rigidly connected at its inner end to an impeller hub. The blade-attachment shaft is abutted against the radial outer side of the hub and is pre-tensioned by compressing said shaft in the longitudinal direction thereof against said hub.

Abstract: There is provided an axial fan having a fan wheel with settable blades, each blade being rotatably mounted at its root end about an axis which extends substantially radially relative to the fan wheel, and carries a setting arm which projects radially outwardly relative to the blade axis, said arm being connected via a movement-transmission arm to a setting device which is common to all said blades and which is displaceably mounted on the fan wheel for movement in the axial direction thereof to change the blade angle. The setting device is also rotatable coaxially in relation to the fan wheel, and each movement-transmission arm is rigidly connected at one end thereof to the setting device. The other end of the movement-transmission arm is mounted in the associated setting arm for both axial and universal movement.

Abstract: An improved rotor hub and seal assembly for a rotor-craft such as a helicopter includes an improved tri-hinge rotor and an improved oil seal assembly for the rotor pitch bearings. The rotor blades are mounted to the underslung hub by coning hinges, offset from the teetering hinge to which the rotor shaft is attached, so that the stabilizing centrifugal force is always greater than the destabilizing moments. The rotor also includes a teeter hinge restraint, while the oil pitch bearings are sealed by a boot-type seal to permit angular movement of the outer blade root housing relative to the bearing spindle resulting in shear rather than tension on the boot.

Abstract: A multiblade, wind-driven, variable pitch propeller is supported on a tower for rotation by wind forces and is connected through gears to drive an electrical generator or the like to produce electrical energy. The gears include a ring and pinion arranged in a gear case so that wind forces acting on the propeller and torque forces produced in the gears are balanced, thus avoiding swinging movement of the propeller about the tower axis due to unbalanced forces and thereby keeping the propeller axis pointed into the wind. The pinion gear is engaged with the ring gear at a location spaced near the top of the ring gear and a pinion shaft sleeve is disposed around the pinion shaft and sealed to a bottom portion of the gear case to effect a gear lubricant seal therewith, thus eliminating the requirement for an oil seal between the pinion shaft and gear case, with concomitant elimination of the oil seal drag, and also eliminating friction drag of the gear lubricant itself on the pinion shaft.

Abstract: This invention is primarily a backup seal safety device to prevent a sudden loss of oil through failure of a pressed expansion plug in the front of a hollow, oil-containing crankshaft commonly associated with aircraft engines that supply oil under pressure to a controllable pitch, constant speed aircraft propeller when this type of propeller is utilized. The plug is installed in these engines when a fixed propeller is installed in place of the constant speed propeller.

Abstract: A method and apparatus for lubricating the bearings associated with rotor mounted variable pitch type blades in axial flow fans.

Abstract: The invention concerns a marine propeller support arrangement, in which the center of gravity of the propeller is substantially coincident with the geometrical center of the aftermost stern-tube bearing, which bearing substantially supports the weight of the propeller. The propeller may be driven from its after end by means of a drive plate detachably secured to both the propeller and the propeller shaft. The bearing may be furnished with oil pockets and supplied with pressurized oil. An auxiliary emergency bearing may be provided in the propeller bore.