Showing papers on "Gear pump published in 1977"

Hot melt dispenser with removeable pump in follower

Abstract: A dispenser, such as for a hot melt material, incorporates a platen which is movable into a container of material to be dispensed and incorporates a cartridge-type gear pump positioned centrally of the platen. The platen is carried on a support tube and the lower end of the support tube is provided with an opening through which the cartridge gear pump may be inserted or removed from the platen without the necessity of otherwise disturbing the platen.

Automatic transmission with overdrive

Abstract: An automatic transmission including: a torque converter; a torque converter housing; an oil pump; an overdrive gear mechanism; an overdrive case; an underdrive gear mechanism; a transmission case for the underdrive gear mechanism; an oil pan under the underdrive gear mechanism; and a hydraulic control device controlling a hydraulic pressure to be delivered to the overdrive and underdrive gear mechanisms In this automatic transmission, the overdrive case is formed with a first passage connected to an inlet port of the oil pump, a second passage connected to a discharge port of the oil pump, a third passage connected to an inlet port of the torque converter, and a fourth passage connected to an outlet port of the torque converter, with the second, third and fourth passages being connected to the hydraulic control device

Magnetically coupled gear pump construction

Abstract: A pump body has a cavity containing gears and parts communicating between the exterior and the cavity as well as two shafts on which the gears revolve. One face of the cavity is closed off by an apertured plate. The drive gear shaft extends through the aperture in the plate and supports the driven magnet. Drive means also extend through the aperture causing the hub of the driven magnet to turn the drive gear. All parts to the motor side of the plate may be standardized, while the pump body and its contents may be specially adapted to the particular ultimate installation of the pump.

Windmill operated system

Abstract: A windmill drives a fluid pump which operates a hydraulic motor. In one embodiment, the mechanical output of the hydraulic motor operates a heat pump employed for heating and/or cooling purposes. In another embodiment, the fluid discharge from the hydraulic motor is recirculated through a fluid reservoir. The heat of the fluid in the reservoir, resulting from the inefficiency of the pump and the hydraulic motor, is employed for heating purposes.

Feeder for apparatus for ejecting a mixture of a plurality of liquids

Abstract: A feeder for apparatus for ejecting a mixture of liquids, e.g. urethane foam, comprises a pair of swash plate proportioning pumps one individual to each of the liquids, e.g. resin and isocyanate, each proportioning pump being fed by a gear pump from a supply of the respective liquid. Seepage along the drive shafts of the isocyanate pumps is continuously removed by bathing them in a recirculating stream of flushing agent. The swash plate and gear pumps and flushing agent pump are all driven by a single motor from a common chain drive. The liquids are heated during passage through separate hoses to a common dispensing head or gun, by immersed coil electric resistance heaters extending lengthwise freely within the hoses. A novel control system is provided for the hose heater circuit, the adequacy of the liquid supply and other operating conditions.

Feeder for apparatus for ejecting a mixture of a plurality of liquids, with heated hoses

Abstract: A feeder for apparatus for ejecting a mixture of liquids, e.g. urethane foam, comprises a pair of swash plate proportioning pumps one individual to each of the liquids, e.g. resin and isocyanate, each proportioning pump being fed by a gear pump from a supply of the respective liquid. Seepage along the drive shafts of the isocyanate pumps is continuously removed by bathing them in a recirculating stream of flushing agent. The swash plate and gear pumps and flushing agent pump are all driven by a single motor from a common chain drive. The liquids are heated during passage through separate hoses to a common dispensing head or gun, by immersed coil electric resistance heaters extending lengthwise freely within the hoses. A novel control system is provided for the hose heater circuit, the adequacy of the liquid supply and other operating conditions.

Gear pump with suction shoe at gear mesh point

Abstract: A pump has a block and a cup-like member having a rim engaging the block to define a pump cavity. Recessed into the block and opening or extending into the cavity are an inlet and an outlet duct and three parallel pins. The drive and driven gears are mounted on two of the pins, one face of each gear being tight against the block, and the two ducts are on opposite sides of the mesh point of the gears. A shoe is mounted on the third pin and overlies the inlet duct and the mesh point of the gears plus about two teeth to either side of the mesh point. A spring biases the shoe into contact with portions of the gears and the block to define a pump chamber. After a differential between the inlet and outlet duct pressures is established, this differential supplements the spring. One means of driving the drive gear comprises a motor driven annular magnet on the outside of the cup-like member and a smaller magnet within the cup-like member drivingly connected to the drive gear.

Low energy recovery compounding and fabricating apparatus for plastic materials

Abstract: Plastics recovery, compounding and fabricating apparatus is disclosed utilizing a gear pump specially designed to include a media free space between the gear face and side walls with minimum sealing to improve volumetric pump efficiencies and provide pumping capacity insensitivity to viscosity over a wide range.

Electric generator arrangement

Abstract: An electric generator arrangement comprises a generator and a continuously-variable ratio drive, whereby the generator can be driven at a constant speed over a range of speeds applied to an input shaft. The drive comprises an epicyclic differential gear having a planet gear carrier driven by the input shaft, a sum gear coupled to coupled to the generator and a ring gear. The ring gear can be driven at varying speeds by hydraulic units to vary the ratio of the speeds of the input shaft and the sun gear. The hydraulic units are driven by the input shaft and the speed of the ring gear is controlled by an electro-hydraulic control system which is responsive to the frequency of an output signal from a part of the generator. Fluid under pressure for the hydraulic units and the hydraulic control system is provided by a combined pump and de-aerator on the shaft of another part of the generator.

Power steering device

Abstract: PURPOSE:To provide a compact, economical fullhydraulic system power steering device for a large-scaled vehicle or the like by improving a controlling valve for controlling discharge oil amount and distributing direction while operating said valve by an input rotary shaft through a gearing CONSTITUTION:When a steering wheel is rotated clockwise for example, a ring gear 50 is rotated through an input rotary shaft 20 to rotate a pinion 51 However when a power cylinder 5 bears a load, a gear pump constituted from these gears 50 and the pinion 51 does not carry out discharge action and both gears 50, 51 are rotated integrally with each other At the same time a valve 49 of a controlling valve coupled with the pinion 51 through a connecting shaft 58 is also rotated in the same direction to shut off the communication between thin holes 48, 47 Thus, working oil from a main pump 2 enters a pump chamber through flow paths 27, 31, 26, 97, etc to rotate the pinion 51 counterclockwise Also, working oil dischrged from the pump chamber enters a right chamber 17 of the power cylinder 5 through flow paths 98, 25, 29, etc to generate steering force

Anti-backlash gear assembly

Abstract: An anti-backlash gear assembly including an hydraulic piston that automatically maintains clearance-filling positioning of two relatively circumferentially adjustable axial parts of a split gear by receipt of hydraulic fluid from a local accumulator via a fluid-retaining check valve means.

Three gear pump with module construction

Abstract: A module pump comprises a manifold having intake and outlet connections; a plate to which gears and a "shoe" (which function to define pump chambers for a pair of gears) or, in a pump having three gears two "shoes;" a drive for the gears, which in a preferred embodiment is a magnetic drive; and a barrier between the drive and the plate. Each of the modules is subject to variations in design depending upon end use and hence wide versatility is achieved without great increases in manufacturing cost since only one of the modules need be altered. Use of three gears doubles the capacity of the pump; if three gears are not needed the mounting holes for the third gear may be plugged. A unique bypass is installed in the manifold to permit flow back to the intake when the pressure exceeds an adjustable amount.

Feeder for apparatus for ejecting urethane foam formed by the mixture of resin and isocyanate with flushing liquid

Abstract: A feeder for apparatus for ejecting a mixture of liquids, e.g. urethane foam, comprises a pair of swash plate proportioning pumps one individual to each of the liquids, e.g. resin and isocyanate, each proportioning pump being fed by a gear pump from a supply of the respective liquid. Seepage along the drive shafts of the isocyanate pumps is continuously removed by bathing them in a recirculating stream of flushing agent. The swash plate and gear pumps and flushing agent pump are all driven by a single motor from a common chain drive. The liquids are heated during passage through separate hoses to a common dispensing head or gun, by immersed coil electric resistance heaters extending lengthwise freely within the hoses. A novel control system is provided for the hose heater circuit, the adequacy of the liquid supply and other operating conditions.

Log splitter with gear rack drive

Abstract: A log splitter of the horizontal track, upstanding blade, reciprocating carriage type is driven by mechanical rather than hydraulic mechanism to reduce cost and weight and breakage. Instead of crank arms, a gear rack and spur gear system is provided, there being a large drive gear meshed with the spur gear, and a small diameter, light weight flywheel on the motor drive shaft, the mechanical advantage being sixteen to one or more. A safety overload kick-off is incorporated into the control mechanism for automatic actuation when a log presents unusual resistance to splitting.

Piston engine with internal gear ring oil pump - having pinion mounted directly on engine crankshaft and crescent-like spacer in max. with section of working chamber

Abstract: The pinion (8) of the gear pump is keyed onto the crankshaft, so that is rotates with it. The axial movement of of the pinion is restrained by the pump housing. The gear ring with internal teeth with convex shaped tooth flanks is mounted in the pump housing. A half moon shaped free space is located opposite the point at which the teeth of the pinion have the deepest penetration. Most of this space is occupied by a filler piece (10).

Method and apparatus for hydraulically driving and controlling a cooling fan

Abstract: A method and apparatus for hydraulically driving and controlling a cooling fan. The apparatus includes a variable displacement hydraulic pump driven by a prime mover and a hydraulic motor connected to the pump and being driven thereby. The motor in turn is connected to a fan which serves to cool fluid passing through an associated heat exchanger. A temperature/force transducer monitors the temperature of fluid flowing from the exchanger and serves to control a pilot relief valve associated therewith. A pressure regulator is connected to the pump and acts in cooperation with the relief valve to control fluid pressure from the pump and thus torque of the motor and speed of the cooling fan. The method includes the steps of pumping hydraulic working fluid to a motor and driving the motor with the full hydraulic output of the pump to power a fan associated with a cooling system heat exchanger. The method further includes the steps of sensing the temperature of fluid leaving the exchanger and controlling the pressure of fluid from the pump in response to the temperature of the fluid leaving the radiator and thereby hydraulically controlling the speed of the fan associated with the radiator.

Fuel system with metering pump for internal combustion engines

Abstract: A fuel supply system supplies volatile fuel at a controlled rate to an air-fuel mixing chamber leading to a subatmospheric intake manifold of an internal combustion engine. Fuel is metered out by a metering gear pump supplied with fuel under pressure sufficient to maintain the fuel in its liquid state. An equalizer valve maintains the pressures on the two sides of the gear pump equal. This assures linearity of fuel rate as a function of pump speed. Pump speed is measured to provide a feedback signal to a controller. The controller compares the feedback with a control signal indicative of desired rate of fuel to develop driving power for application to the gear pump to drive the latter at the speed that supplies fuel at the desired rate.

High pressure gear pump or motor - has crescent shaped component for sealing and compensating high radial forces

Abstract: Pump or motor has a driven pinion and an engaging internally toothed gear wheel. Between the externally toothed pinion and the internally toothed wheel are fitted one or two crescent shaped filling pieces. The radial pressure forces are compensated by a relatively simple means. A crescent shaped component eliminates the need for an actuating or compensation piston. The filling piece (3) has elements such as pistons or plates (13) for sealing the pinion or the wheel. It can have two components or halves which are pressed against the pinion and the wheel, and consists also of two halves, one of which acts as a sealing element. The compensation forces act on the sealing element (13). This sealing element floats and it is pressed against the corresponding gear wheel by an additional force generated by a spring or hydraulically.

Hydraulic speed change gear having an automatic pressure control device

Abstract: A hydraulic speed change gear designed to automatically control its hydraulic circuit pressure to be held at all times at a substantially constant level irrespective of the loading condition so as to enable the pressure oil in the hydraulic circuit to be used as a pressure source for other various hydraulic equipment. To this end, the gear includes a fixed displacement hydraulic pump adapted to be driven by an input shaft, a variable displacement hydraulic motor having an output shaft, a closed hydraulic circuit connecting between said pump and said motor, a hydraulic supply pump drivably coupled to said input shaft, a supply passage connected with a discharge port of said supply pump and with said closed hydraulic circuit through check valves, and an oil pressure control device connected with said closed hydraulic circuit and said supply passage for reducing the oil pressure in said supply passage in proportion to a pressure rise in said closed hydraulic circuit.

Variable displacement gear pump

Abstract: An internal-external gear pump wherein the fluid displacement thereof is variable. The internal gear is rotatably driven by a drive shaft about a fixed axis and the external gear is rotatably driven by the internal gear about a controlled movable axis eccentric to the fixed axis. Movement of the external gear axis causes the eccentricity between the internal and external gear axes to vary, thereby resulting in a change in the depth of gear tooth mesh such that the volume of fluid displaced by the meshing teeth is varied. The position of the external gear axis is established by a control ring which rotatably supports the external gear, and is mounted in a stationary housing so as to be rotatably positionable within arcuate limits about a fixed axis eccentric to both the axes of the internal and external gears.

Piston pump with planetary gear drive

Abstract: A pump having a planetary gear drive connected to a source of rotary power drives a barrel cam to reciprocate, with a smooth cycloidal motion, a series of pistons operatively connected to the cam. Each piston is reciprocatingly disposed in a cylinder for pumping fluid from a pump inlet to an outlet connected to the cylinders through a series of valve chambers.

Apparatus for noise suppression in a gear pump

Abstract: A pressure plate provides a trapped pressure relief groove oriented along the line of action of mating gears in a gear pump. The groove communicates the fluid trapped between the gear teeth with both the inlet and outlet, thereby reducing high squeezed pressures and lowering hydraulic noise levels. Noise suppression is apparent at all speeds, and is particularly apparent at high pump operating speeds.

Liquid injection molding II. Mechanical design and characterization of a RIM machine

Abstract: A unique liquid injection molding machine for polyurethane was designed and built to process a large quantity of polyurethane in a short period of time. This machine has a continuously variable flow rate. Using inexpensive, low capacity gear pumps, 5 gallon hydraulic accumulators were charged with fluid components. The fluid can be pumped into the accumulators at low pressure followed by nitrogen gas addition to the bladders to raise the fluid pressure, or the charging pumps can pump up the accumulators against an existing pressure. The two components were then discharged under pressure through linkage activated ball valves and mixed together in a mixing chamber. The system provided for a very low pressure loss during discharge, resulting in high fluid velocity. Extremely high flow rates were possible: approximately 1440 lb/min at 2500 psi, a pressure less than the maximum possible system pressure. This system delivers large flow rates of high quality urethane while still maintaining its simplicity, light weight, and relative low cost.

Multispeed gear transmission with plural inputs to internal gear

Abstract: A multispeed gear transmission having an internal gear driving an output shaft. The internal gear is in constant mesh with a plurality of drive pinions. Each drive pinion is connected to a fluid actuated clutch. The driving members of the clutches are driven by respective gears in constant mesh with each other or with a common input gear. Auxiliary output shafts may be driven by a gear meshed with the internal gear or by one of the drive pinions.

Mounting for traction member with lateral step-down transmission

Abstract: A mounting for a vehicular traction member, such as an endless track, comprises a trunnion carried by means of two axially separated journal bearings on a hollow hub projecting from a vehicle frame, the hub being an extension of a transmission housing accommodating a planetary-gear train driven by a power shaft. An ancillary shaft coaxial with the power shaft, floatingly disposed within the hub, meshes at opposite ends with internal gear teeth of the trunnion and of a planet carrier forming part of the planetary-gear train, that planet carrier also driving a gear pump for the circulation of oil from a pump within the transmission housing across a space between the two journal bearings in which the oil is cooled through the trunnion wall.

Gear pump or motor

Abstract: PURPOSE:To reduce the internal leak of a gear pump in low-speed revolution by allowing one among the pressure passages which communicate to an intermediate-pressure area formed onto the back-part of the side plate of the gear pump to communicate to a high-pressure side and allowing the other to communicate to the low-pressure side in the process where the tooth-groove pressure varies from low-pressure to high-pressure. CONSTITUTION:Each bush 30, 31 of a gear pump has the surface (a) on the equal level to the side surface of a body 11 and the surface (b) in the sunked state for the side surface of the body 11, and a sealing member 32 is arranged at the boundary. The low-pressure area L on the left side of the sealing member communicates to the an inport 35 side, and the other high-pressure area H communicates to an outport 36 side. The part in the tooth groove where the pressure varies according to the number of revolution of the gear forms an intermediate- pressure area M having a free piece 33, and into said intermediate-pressure area, each pressure of the outport and the tooth groove at the part on the low pressure-side of the intermediate pressure area is introduced through pressure transmitting passages 37 and 38.

Control arrangement for a hydrostatic drive

Abstract: A control arrangement for a hydrostatic drive comprises a gear pump driven by an internal combustion engine and supplying fluid to a fluid motor. The control arrangement is constructed in such a manner that even at a high number of revolutions per time unit of the internal combustion engine, the fluid motor may be operated at a low number of revolutions.

Manually controlled semi-automatic step gear transmission

Abstract: A manually controlled semi-automatic, multiple-step, internal gear driven transmission characterized by a hydraulic activation system of compensating fluid pressure versus spring compression resistance forces including a forward section having an integrated dual clutch and pinion carrier, driven by an engine shaft, a gear-type oil pump driven by helical gears supplying the servo-system, a rear section pinion carrier, related die cast pinion gear clusters, annulus gears and an interconnecting middle section dual-annulus gear The gear ratio changes are effected by annulus fluid-combination spring power cylinder brake control and fluid actuated clutches capable of causing the transmission of torque to a load shaft directly through a main shaft, through the rear pinion carrier or through the dual annulus, whereby the least reduction is obtained when all elements are in operation The invention is further characterized by a variable pressure regulator, governing actuating fluid pressure at idling speeds, and a differential-piston pressure regulator, governing main line fluid pressure at all speeds, to a directory rotary distributor valve feeding said power cylinders and clutches as directed by a manual straight line shifting arrangement, said regulators having a compensating fluid pressure versus spring compression design

Portable electrically driven suction pump - has flexible hose connected probe for pumping oil out of motor car sump via dipstick hole

Abstract: The pump arrangement consists of an electric drive motor which can be a hand power drill and a gear pump (2). A thin probe (2a) is connected by a flexible hose (2b) to the suction side of the pump. The probe is lowered through the dipstick hole. The pump arrangement is mounted in a frame (1) which is light and can be carried easily. The frame is fixed with quick connecting screws (6) to the top of an oil drum (4). A flexibel hose (2c) leads from the outlet side of the pump into the oil drum. The 12V. D.C. motor can be driven from the car battery.