Abstract:
A hydraulic arrangement has a housing which includes a first space of a definite first pressure and a second space with a lower second pressure. A primary pump supplies fluid under the first pressure into the first space to open the entrance ports into cylinders, which contain pistons therein, whereby the pistons are forced partially out of the cylinders and into the mentioned second space. In the second space the pistons are moved inwardly into the cylinders by an eccentric cam ring to supply a flow of fluid of a fourth pressure out of the outlet of the arrangement's housing. In modified embodiments the arrangement is a pressure transmission, which takes in a third pressure to drive a motor in the arrangement which in turn drives the shaft with the eccentric cam and the unit then exits the fourth pressure, which might be a very high pressure of up to more than ten thousand pounds per square inch. Still other embodiments show in several modifications a device to reciprocate or oscillate exterior linear or rotary motors either permanently or stepwise in predetermined cycles. Working actions of machines or vehicles can so be driven and controlled by the arrangement without additional control facilities, when so desired. A valve arrangement elects different pressures for different quantities of flow of fluid.
Abstract:
In radial piston pumps and motors the dimensions of the rotor, pistons and piston shoes are optimized for best efficiency and power in a given size and weight. The efficiency and reliability of the piston shoes is improved by the provision of fluid pressure pockets in the outer face of the piston shoe which have cross-sectional areas exceeding the cross-sectional area of the piston whereon the piston shoe is pivotably borne. Welding of the outer face of the piston shoe is prevented and the devices are able to operate with higher pressures and rotary velocities.
Abstract:
A rotor having airfoil section shaped blades is set into a fluid stream. Over a connection or transmission means a propeller is connected to the rotor. The fluid stream whereinto the rotor is set gives airflow energy to the rotor and revolves the rotor. The propeller is driven by the rotor over the connection or transmission means. Since the propeller is revolved by the rotor in the fluid stream, the propeller provides a thrust. The thrust may be used to lift a weight or to drive a member. A suitable application of the arrangement is for example, to transform a multibladed helicopter into a gliding craft which descends under a gliding angle towards the surface of the earth, when the helicopter has a complete engine failure. Auto-rotation accidents can thereby become prevented. The device is also applicable to drive a vehicle or to lift a weight. Variable means can be applied to obtain variable thrusts in flying craft to improve their efficiencies or change from one flight system to another flight system. In other embodiments several novel concepts for air-borne craft are provided which include emergency landing devices, retractable and extendable or relation varifying devices for wings or propellers. Improvements are also proposed to engines and hydraulic devices to increase the power or efficiency, to lessen the weight per power output or to simplify the manufacturing and reduce the costs.
Abstract:
A cylindrical piston has a part-cylindrical outcut, which is slotted radially and contains a swingable pivot-member of at least part-cylindrical configuration borne in the outcut and pivoting therein under load. The mentioned outcut is formed partially around an axis which is normal to the longitudinal axis of the mentioned piston and extending through the longitudinal axis of the piston. A plurality of preferably part-annullarily formed grooves for the reception of pressure fluid are provided preferably in said pivot-member in order to lubricate bearing portions of said member between two adjacent grooves or recesses to assure a high pressure lubrication from both ends of the respective bearing portion. Efficiency and life time of said bearing portion is thereby increased and so is the bearing capability.
Abstract:
A radial-piston machine has a rotor formed with a plurality of each a piston carrying radial cylinders.Each such piston is formed on its radially outer end with a part-spherical seat and a part-spherical portion of a respective piston shoe that rides on an eccentric cam in the housing is engageable in each seat. Each such piston shoe may move radially into and out of engagement with the respective piston. A pair of end members axially flank the piston shoes to prevent their escape in axial-direction.The piston-engaging portions of the shoes are always engaged radially in said cylinders. The cylinders may have outer portions with a cross-slot extending parallel to the axis of the rotor through said cylinders. The pistons and shoes may embrace each other partially or be radially free of each other, so, that either the connected piston and piston shoe assembly moves radially between end elements associated to the rotor or the pistons and shoes move unconnected to each other radially between said end elements. The piston shoes may have one--two--or three--dimensional free play.
Abstract:
In radial bearings of mechanical nature the life time id is limited. In hydrostatic bearings the lateral loads may over time or even quickly deform the bearing and make it less effective. The invention overcomes this problem by providing not a hydrostatic bearing, but mechanical bearings to revolvable members and a hydrostatic support member, which carries the major portion of the load. The hydrostatic support member is radially flexibly mounted in order to adapt itself for proper support of the mechanical bearings. The device is also very convenient for hydrostatic pumps and motors with radially expanding and contracting working chambers.
Abstract:
A snap ring consists of four plane rings with a gap for the possibility of radially deforming said rings within the limits of flexibility of the material. Two rings are set as inner rings and two outer rings are set as outer rings axially of the inner rings whereby the rings are axially behind each other fastened relatively to each other around a common axis. However the gaps of the inner rings are showing in another direction than the gaps of the outer rings whereby the outer rings are radially closing the gaps of the inner rings and vice versa. One of the snaprings can be utilized as an outer snapring to hold a cylindrical part therein and another of the snaprings can be an inner snapring for holding itself or a part in a cylinder or bore.
Abstract:
A high pressure internal gear pump has an inner rotor with outer gear-type teeth inside of an outer rotor with inner gear type teeth. The outer rotor is eccentrically revolving relatively to the inner rotor, whereby the gear-teeth are meeting each other as known from the former art. A half-moon like part is provided between the inner and outer rotor as usual in such pumps. The invention provides slots for the reception of pressure in the part between the teeth or in the housing surrounding the outer rotor. The pressure in said slot or slots presses the neighboring portions against the inner- and/or outer rotor for more perfect seal at high pressure. In addition an axially adjusting thrust body may be provided to seal the ends of the rotors. The mentioned slots may have enlargements on suitable locations in order to make the adjacent sealing parts more flexible for suitable sealing engagement with the respective portions of the rotors. Rotors and separation member can float freely under balanced fluid pressure loads.
Abstract:
A vehicle for traveling in the air and on the ground is equipped with two, four, or eight propellers on vertical shafts, each driven by a rotary hydraulic motor of the radial-piston type. The motor comprises two rotors which are connected in individual hydraulic circuits supplied with fluid from different hydraulic pumps. One embodiment of the vehicle comprises an automobile with the propellers mounted in oblique air ducts or in shrouds pivotable in the travel direction. Each rotor of the hydraulic motors is coupled to the shaft unidirectionally so that in case of failure, the shaft can be driven by the other rotor. Each hydraulic pump preferably produces four equal fluid flows and comprises two rotors on a common shaft, each rotor with two separate groups of cylinders, the eccentricity of at least one of the rotors being adjustable. Both the hydraulic motor and the pump have inlet and outlet connections on the radial periphery of the housing. In another design intended for operation under high pressure, the hydraulic pump producing four equal simultaneously adjustable or four individually adjustable flows comprises one rotor with four separate cylinder groups, fluid passages leading to both axial sides, and interposed pressure inserts which are urged into a sealing contact with the rotor by small fluid pressure chambers formed at the axial outside of the inserts.
Abstract:
An aircraft body has a pair of hydraulic fluid-operated motors mounted on it, a pair of stream-creating devices driven by the motors and symmetrically arranged on opposite sides of the body. One or more hydraulic fluid-flow producing devices has at least a pair of separate fluid-handling chambers each connected to one of a pair of separate outlets, and including arrangements for fluid-tight separation of the chambers and outlets, so that fluid from each chamber passes through only one of the outlets. A pair of displacement units is associated with the fluid-handling chambers, respectively, and an equally acting actuator arrangement cooperates equally with both of the two displacement units for maintaining equal movements of the two displacement units so that fluid flows in the outlets at proportionate and equal flow rates. A pair of delivery passages connects each of the outlets with a different one of the motors, respectively. A wing is attached to the body of the aircraft and includes at least one hollow space for the reception of a foldable propeller. The foldable propeller is attached to a hydraulic motor and driven by it. The hydraulic motor drives the propeller when the propeller is located outside of the hollow space and when the blades of the propeller are extended normal to the axis of the hydraulic motor. The blades of the propeller can be swung into a position about parallel to the axis of the hydraulic motor and the motor and propeller can then be retracted into the hollow space in the wing for rest.