Showing papers on "Gear pump published in 1973"

Rotary gear motor/pump having hydrostatic bearing means

Abstract: A gear hydraulic pump or motor utilizes a sun gear, ring gear, and pairs of planet gears in a planetary arrangement with power shafting connected to either sun or ring gear or both. All gears are centered in their clearance by hydrostatic bearings supplied with fluid from the tooth trapping zones.

Torque limiting means for variable displacement pumps

Abstract: The loading of rotor support journals, of variable displacement pumps, which is proportional to the theoretical driving torque of the pump, is converted to a fluid pressure which is proportional to the theoretical pump driving torque. The fluid pressure is applied to a plunger in opposition to an adjustable load, to operate a servo valve to regulate the pump displacement. The loading may be varied to provide variations in the pump driving torques to correspond to the torques available from a prime mover under a variety of power settings.

Controlled output gear pump and motor

Abstract: A gear pump and motor having a plurality of pumps and motors, each of which have at least three gears interengaged with one another, seal members disposed adjacent to the gears, and control means for selectively controlling the movement of the seal members toward or away from the gears of the pump and motors so as to selectively actuate the pumps and motors so as to attain a desired output.

Pump impeller construction

Abstract: Gear pump impellers formed of Teflon because of the softness and slipperiness of the material are difficult to connect to a metallic shaft. Yet Teflon is a very good material for gear pump impellers because of its low co-efficient of friction, chemical inertness and ability to withstand high temperatures and extreme temperature variations. In this invention a portion of the plastic is confined between a rigid central shaft spline and a cup rotatable with the shaft so that the plastic cannot flow without two-dimensional or three-dimensional distortion or tearing, both of which are resisted by the plastic.

Planetary gear pump

Abstract: A pump wherein a central rotating gear drives flexible planet gears about its circumference and inside a circumferential ring gear shaped outer housing The space between the central rotating gear and the circumferential ring gear varies in cross sectional area to form a pumping chamber and communicates with inlet and outlet ports to permit pumping of fluid therethrough The variable shape of the pumping chamber is achieved through the use of non-concentric ring and sun gears, non-circular sun and ring gears, flexible segments in the ring gear, or a flexible sun gear

Bidirectional planetary gear transmission

Abstract: The bidirectional planetary gear transmission has a pressurized fluid actuated friction brake assembly for selectively braking alternately the planetary gear carrier and ring gear to effect rotation of an output shaft in one direction and the opposite direction. A locking means is provided to hold the planetary gear carrier or ring against rotation, whichever one is associated with prolonged rotation, without maintaining braking of the pressurized fluid actuated brake assembly. Another feature is that the pressurized fluid actuated friction brake assembly has two brake sets (one coacting with the planetary gear carrier and the other with the ring gear) and a dual piston-cylinder mechanism in which the pistons are connected for conjoined reciprocation so that when one brake set is engaged, the other is automatically disengaged.

Continuous drive liquid mixing amd metering device

Abstract: A device for mixing two or more substances in which each substance is metered by a separate continuous-flow, positive displacement, volumetric gear pump, then forced together in a mixer manifold, then mixed to homogeneity by forcing through rotating ball, roller, or cone bearings. As an added feature of the invention, the mixer has a purge system permitting one-way flow of either solvent materials or washing materials into the mixer manifold, and a clutch assembly which allows the pumps to be disabled and thus non-delivering while the mixer is being purged. Another feature is valving to permit the introduction of catalysts or the like into the mixer manifold.

Sealing arrangement for a fluid pressure device

Abstract: A gear pump is provided with a movable wear plate disposed between the pump gears and housing A seal member received in a groove formed in the surface of the wear plate adjacent the housing is pressure-loaded during operation and thereby urged into sealing engagement with the housing to define pressure loading zones on the wear plate The fluid pressure exerted on the wear plate, as determined by the pressure loading zones, urges the wear plate in a direction to load the gears Preloading means are provided to urge the seal member in one direction toward the housing and in another direction toward one of the side walls of the groove to provide an effective fluid seal when the pump is at rest and during initial operation

Gear pump for highly viscous media

Abstract: A gear pump for highly viscous media includes a housing having an inlet passage at one end and a discharge passage at the opposite end and a pair of pump gears are rotatably supported within the housing and have intermeshing teeth. The inlet passage comprises an inwardly converging cone havng an angle aperture of 36* to 60* and leads centrally to the space overlying the meshing gears. On a side of the inlet passage which overlies the side of one of the gears, there is provided an additional rectangular opening or recess having a cross-section with a width substantially equal to the width of one of the gears and a length corresponding substantially to the double outside diameter of each gear wheel minus a tooth height.

Multiple-speed transmission with reverse drive

Abstract: Transmissions adapted in particular for small and relatively inexpensive applications and particularly for a safe forward and reverse multiple-speed drive for snowmobiles, all terrain vehicles, passenger vehicles, trucks and the like. A transmission including a single planetary gear set with the output shaft directly secured to the ring gear and having one of the sun gear and the planet carrier selectively driven by an input shaft and a braking unit arranged to gradually brake the planet carrier, or the sun gear, for reverse drive or forward drive respectively. An axially displaceable control member selectively locks either of the sun gear and the planet carrier to the braking unit for braking action thereby. The braking unit consists of a gear pump having a stator secured to the transmission casing and a rotor which is gradually braked by the centrifugal action on a valve controlling the outflow of the gear pump.

Hydraulic differential gear box

Abstract: A hydraulic transmission comprising a casing, a hydraulic torque converter, a reduction gear system and a collecting gear system. The hydraulic torque converter is connected to the input shaft and to the reduction gear system. A first clutch selectively engages the input shaft to the collecting gear system and a second clutch selectively engages the reduction gear system and the collecting gear system. The collecting gear is an epicyclic system and has a crown wheel adapted to be engaged by a brake whereby selective reverse running is obtained.

Gear pump and motor

Abstract: A gear pump and motor having a plurality of pumps and motors, each of which have at least three gears interengaged with one another, seal members disposed adjacent to the gears, and control means for selectively controlling the movement of the seal members toward or away from the gears of the pump and motors so as to selectively actuate the pumps and motors so as to attain a desired output.

Valve porting arrangement for a gerotor

Abstract: A fluid displacing device having a fixed internal gear in mesh with a planetating external gear to expand and contract pressure chamber formed between the teeth of the internal gear causing flow of fluid to and from the pressure chambers alternately placed in fluid communication with inflow and outflow ports by a flow distributing arrangement which includes an externally grooved, rotary slide coaxially coupled to the power shaft and mounted on the coupling shaft to which the external gear is pinned. Continuous fluid communication is maintained by the external grooves at the end of the rotary slide in sliding contact with the external gear.

Gear type flow divider

Abstract: A flow divider includes a casing within which a plurality of gears are rotatably mounted in intermeshing relation. The intermeshing gears constitute at least two gear-pump or gearmotor structures. Each gear pump structure has a fluid inlet and a fluid outlet and all of the inlets for a plurality of gear pump structures are connected to a single inlet port. Fluid enters through the single inlet port into a plurality of inlets. From there it is carried by a synchronized rotation of the intermeshing gears toward a plurality of outlets at substantially the same flow rate regardless of the difference in pressure at said outlets. The flow divider also operates as a flow collector.

Power transfer system in a multi-engine propeller driven aircraft

Abstract: A twin engine aircraft is disclosed including a pair of engine driven shafts and a pair of overrunning clutches are mounted on the shafts with each clutch including a first member mounted on the corresponding shaft for rotation therewith and a second member journaled from the first member. Each pair of first and second members includes coacting structure operative to drive the second member from the first member in one direction of rotation and to allow rotation of the second member in the same direction in advance of the first member. A pair of gear-type fluid pumps are provided and each includes first and second gear wheel portions. The second members of the overrunning clutches comprise one of the gear wheel portions of an associated gear type pump and each of the gear type pumps includes an inlet and an outlet. The inlet of each pump is in closed communication with the outlet of the other pump. By this arrangement should one of the engines of the aircraft be disabled the gear pump driven by the other engine will drive the gear pump associated with the other engine and the propellers of the twin engine aircraft are mounted on the second members of the corresponding gear pumps.

Gear pump arrangement

Abstract: The meshing gears of a gear pump are mounted on bearing bodies, and have inlet and outlet regions. Two axially extending strips in the outlet region, crossing the gears and bearing bodies, are subjected to inward fluid pressure and close channels around the gears communicating with the inlet so that inlet and outlet are fluid-tightly separated near the outlet.

Variable output gear pump and motor

Abstract: A gear pump and motor having a plurality of pumps and motors, each of which have at least three gears interengaged with one another, seal members disposed adjacent to the gears, and control means for selectively controlling the movement of the seal members toward or away from the gears of the pump and motors so as to selectively actuate the pumps and motors so as to attain a desired output.

Floating plate for end clearance seal on gear pumps

Abstract: A floating plate presents a flat flexible plate interface to the registering gear faces and a sealing pack means conforms elastically to bridge the drop-off between the gear height and the depth of the gear pocket in the housing gap between the edge of the pump casing axially adjacent the pumping chamber and a floating pressure plate so that a mechanical translation of pressure force may be uniformly applied to the floating pressure plate.

Helical gear pump

Abstract: A helical gear pump provided with a cylindrical rigid casing and a resilient flexible stator member encased in said cylindrical rigid casing and having internal helical grooves of which each end of said stator member is turned up and outwardly and is engaged in a radially extending rim in which each end of said cylindrical rigid casing is tucked therein, simultaneously the outer periphery of said rim is tapered toward the end of said stator member. Thus, both ends of said cylindrical rigid casing are prevented from corrosion and materials transported through said pump may be prevented from leaking outwards of said pump.

Rotodynamic fluid machines

Abstract: In a rotodynamic fluid pump installation wherein the pump includes a casing having an inlet and outlet for pumped fluid, leakage fluid such as for example as occurs at the glands and bearing surfaces of the pump is withdrawn from the casing, cooled, and recycled to the pump inlet to reduce cavitation at low pump loads.

Automobile accessory drive

Abstract: A plurality of automobile accessory devices are driven by a single constant speed hydraulic motor by means of the constant fluid output from a variable displacement hydraulic power steering pump driven in turn by the automobile engine at speeds proportional to the engine speed. Constant fluid output from the pump is maintained by a displacement control means that controls the displacement of the pump inversely with the pressure differential across a predetermined restriction in the pump outlet.

Gear oil pump, especially for motor vehicle internal combustion engines

Abstract: A gear oil pump, especially for motor vehicle internal combustion engines, which includes cylindrical spaces provided in the housing for the accommodation of the gears and with an inlet space and a discharge space; the inlet edges extending in the axial direction of the housing which are formed by the inlet space in conjunction with the cylindrical spaces for the gears, are thereby bevelled off.

Turbo-brake having gear ratio changer

Abstract: A drive system for an output member such as a turbo-brake member including an impeller driven by a planetary gear assembly is provided. A gear ratio changer means including gear pumps is received in a chamber in a case or housing means, and connects to the planetary gear assembly to control the drive gear ratio of the same, and means are associated with said gear ratio changer means for connection to a pressure system to receive pressure therefrom to restrict hydraulic flow in the gear pumps and control the output of said gear ratio changer means.

Continuous blender for thermoplastics - with rate of extrusion controlled by screw or gear-pump

Abstract: The mixer e.g. Banbury type does not itself induce flow. The material, e.g. thermoplastic granules, are fed at a controlled rate and forced into the mixing compartment e.g. by a co-axial screw system. Pressure, and consequently temperature, in mixing chamber, is controlled by rate of extrusion. Difficulties of flow-rate stability encountered with variable orifice stationary nozzles are overcome using fixed nozzle and intermediates screw or gear-pump driven by e.g. hydraulic motor of variable speed, controlled in accordance with measured mixer output temp.