Abstract: In a vehicle or device a fluid motor is employed to drive rotary members, such as wheels, propellers, tracks. The motor is provided with an arrangement which includes a control means and an axially moveable member. By utilizing the control means, for example, by a flow of fluid, the axially moveable member is used to apply an action, which is not common to the usual operation of fluid motors. The arrangement may be used to arrest the rotor of the motor from rotation when no pressure is in the driving fluid line. It may also be used to control the pitch of propellers with variable pitch arrangements. Also possible is to use the arrangement to automatically obtain an auto-rotation of rotor blades on vertical axes of vertically take off and landing vehicles, when the pressure in the fluid line to the motors for driving the motors drops below a predetermined minimum of pressure.

Abstract: In a control device for limiting the maximum permissible input torque or power for a hydraulic pump, a control valve is provided with a first piston area which is acted upon by pressure from a torque sensor. A second piston area effective to more the control valve against a return means is acted upon by pressure from a remote control device so as to reduce the maximum possible input torque and thus create an input torque control device also effective as a power preselecting device.

Abstract: A hydraulic pressure intensifier for boosting normal system pressure in a hydraulic system to a higher level in order to increase the force provided by a pressure-operated actuator. The hydraulic pressure intensifier has a motor-pump unit with a rotatable cylinder block with cylinders defining piston chambers and each having a movable piston therein. A wobbler controls the stroke of the pistons and the motor-pump unit functions as both a pump and a motor by means of porting to said cylinders including a supply pressure port, an intensified pressure port and a return pressure port. The motor-pump unit has normal maximum and minimum speed limits and when operating at different flow rates the speed thereof varies accordingly. In order to maintain the speed of the motor-pump unit within normal limits, the wobbler is adjustable to vary the stroke of the pistons and thereby vary the speed of rotation of the cylinder block for the same rate of fluid flow.

Abstract: A control pintle carries a rotor which rotates around the pintle. The rotor has chambers which can take in and expel fluid. Passages of a reduced cross-sectional area carry the fluid to or from the control pintle and to or from the chambers. The control pintle has control parts and fluid lines, as well as certain recesses. Rotor and control pintle are insofar known from the former art. The invention provides unloading recesses in specific relation to the passages and chambers to make the rotor float around the control pintle concentrically or eccentrically in a desired extent. Supply slots are added to assist the build-up of hydrodynamic pressure fields to act in co-operation with the hydrostatic forces. Details are shown, how such supply means become provided or supply be secured.

Abstract: A hydraulic pump comprising at least a reciprocating piston, each piston being associated with one suction valve returned to its closing position by a return spring. The return spring is associated on the one hand with the valve and on the other hand with a push-piece cyclically actuated by a cam driven by the pump driving shaft in such manner that the action of the spring on the suction valve is cancelled during the suction phase and reestablished at the end of the suction phase.

Abstract: Apparatus suitable for employment in the burping of a water bed comprisesa screw thread or bayonet in the burping and/or filling opening of a waterbed having a removable cap, andair withdrawal means capable of withdrawing air and/or liquid from the waterbed having a cooperating element engageable with the fitting.The method of burping a waterbed comprisesremoving the cap of the fitting in the filling apparatus of a waterbed without substantial loss of liquid therefrom,attaching an air withdrawal device to the fitting about the opening from which the cap has been removed,actuating the air withdrawal device to withdraw air from the bed (with or without lifting of the region of the bag about the fitting to which the apparatus has been attached) and,detaching the air withdrawal device from the fitting when the fitting is positioned so as to minimize the risk of entry of air into the bag and, thereafter refitting the cap to the fitting.

Abstract: A motor-driven radial plunger pump has an outer housing enclosing a motor section and a pump section drivingly connected thereto. The motor section has a motor housing cooperating with the outer housing to define a fluid passage having a fluid inlet adjacent to a part of the motor housing in which a brush unit is disposed. The fluid passage contains a filter element and has a recess disposed upstream thereof and adjacent to motor magnets so that magnetic particles contained in the fluid flow are magnetically adhered to and deposited on the bottom of the recess. The pump section has a rotor with radial plungers slidably disposed in cylinder bores in the rotor. The cylinder bores have radially inner end successively communicated with a suction passage communicated with the fluid passage between the outer and motor housings through feed holes formed in a coupling disc plate drivingly connecting the motor with the rotor.

Abstract: A rotating flow pump such as a centrifugal pump is provided with a feed pump unit formed as an ejector. The feed pump unit comprises an inlet portion, a nozzle, and a diffuser arranged in succession, and the diffuser is connected to the inlet opening of the flow pump. The inlet portion, the nozzle, and the diffuser of the ejector are situated in a plane perpendicular to the shaft of the flow pump. The diffuser comprises an inner channel of a uniformly increasing flow cross section at least over part of its length. Furthermore the diffuser comprises an outer jacket situated substantially coaxially about the above channel. Thus the jacket is formed in such a manner that a substantially 180.degree. almost mushroom-shaped turning of the flow direction for the liquid flowing through the diffuser is obtained at the same time as a uniformly increasing flow cross section--seen in the flow direction--is obtained within the annular chamber between the channel and the jacket.

Abstract: This invention relates to an energy efficient variable displacement motor-driven power drive unit using a multi-variable feedback control system to control system output position and speed. More particularly, a variable displacement hydraulic motor connected to drive a load has a variable-position wobbler, with the position controlled by electro-hydraulic servo means including an electrically-operable servo valve which receives a control signal from signal summing means which has summed feedback signals representing speed and position of a load with a torque signal representative of wobbler position. The latter signal is mechanically inputted to the servo valve by means of a mechanical connection including a link connected to the wobbler and a spring interconnecting the link to the servo valve and with the link carrying a servo piston movable in a servo cylinder associated with the servo valve.

Abstract: A system for the supply of gas to a variable flowrate consumption use point comprising monitoring specified system parameters, making specified determinations, and adjustable the liquid pump speed accordingly. Preferably the monitoring is computerized. The invention results in a less costly and more efficient gas supply system.

Abstract: A standby aquarium pump is disclosed which contains a direct current power supply and relay means which will automatically connect this power supply to start the standby pump when alternating current power is interrupted causing the AC powered pump to stop operating. An alternate embodiment provides rectified alternating current as the normal power supply and the direct current power as a standby or auxiliary power source. A rotary direct current motor is employed to drive a reciprocating piston type air pump using an operating rod eccentrically mounted in a flywheel mounted on the motor drive shaft. Electric shock hazard is reduced by containing all 120 volt alternating current connections in a separate housing secured to the main housing. Thus, the main housing can safely be opened to install or replace the batteries by the user who will be exposed only to the low voltage direct current elements.

Abstract: The invention is directed to a unitary cage assembly annularly positioning a plurality of rollers in a pair of roller bearings supporting a cradle swashplate. By utilizing the unitary cage assembly, a parallel relationship between the rollers is assured and, furthermore, only a single locating mechanism for the unitary cage assembly is required.

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.

Abstract: A novel fluid pump housing for a fluid pump with a float switch is disclosed. The housing includes a clamp adapted to removably hold the float cable in a predetermined position and to allow manual release and reinsertion of the float cable at different positions along the length of the cable without the use of tools.

Abstract: A fluid pump having an outer cylindrical housing (10) rotating relative to an inner hub (44) from which radially projects a probe (52) apertured in its external surface to be exposed to the flow therepast of an annulus of operational liquid (14) constrained in a circular path of motion by the rotating housing, the probe having an internal passage for communicating the aperture with a first external space and the inner liquid-free space in the housing having an outlet for communicating with a second external space. In use, fluid to be pumped is sucked out of the apertured probe to emerge as fluid bubbles which migrate through the rotating liquid annulus to the liquid-free center, then to pass to the outlet.

Abstract: The hydraulic apparatus may either be a quiet hydrostatic drive with an axial piston pump and an axial piston motor or may be a quiet pump unit formed by two axial piston pumps. In either case, the apparatus includes two rotatable cylinder blocks disposed on opposite sides of a rotationally stationary valve block and tied together by a rod which transmits forces between the two cylinder blocks so that any force tending to unseat one cylinder block from the valve block tends to seat the other cylinder block against the valve block. A resiliently yieldable sealing ring on one end portion of the rod defines a pressure chamber which receives oil at working pressure to automatically increase and decrease the axial clearance between the cylinder blocks and the valve block as the working pressure increases and decreases, respectively.

Abstract: Apparatus for applying surgical clips to tissue includes a self-contained supply of clips and is constructed to apply those clips, one at a time, through movement of the thumb and fingers of one hand. The clips are stored inside a sleeve along the length of the instrument, are fed into jaws at the distal end of the instrument, and are closed about tissue by a camming action produced by moving the jaws relative to the sleeve and camming them shut. An actuating and sequencing section controls feeding and clip deformation, and guarantees that the instrument is operated only in the proper sequence so as to avoid jamming.

Abstract: A well deodorizing apparatus includes a checkvalve which provides unidirectional flow in a pump discharge pipe and a tap upstream from the checkvalve to divert a fraction of the pump discharge and direct it through a venturi orifice. The venturi effect atomizes the diverted water resulting in a pressure decrease in a mixing chamber. Ambient air is drawn into the mixing chamber and intermixed with the atomized water. The resultant mixture of air and water is directed back into the ground water reservoir thereby oxygenating the ground water and deodorizing the well.

Abstract: The former art provides multi stroke hydrostatic motors, which perform at a single revolution of the rotor multiple inward and outward strokes of the pistons. A high torque was thereby obtained. The invention discovers, that the known multi stroke motors are still too heavy, obtain small overall efficiencies and their power per size and weight is limited because the known motors failed to provide means to carry the tangential loads by fluid pressure power. The invention increases the power and efficiency of multiple stroke motors by the provisions of control means to control the flow of fluid pressure into pockets open to the piston faces and cylinder walls, whereby the torque of the rotor is transferred from the pistons to the cylinder walls by pressure in fluid in the pockets.

Abstract: An overflow check system 10 blocks overflow from a vapor powered, liquid pressure amplifier 11 except when required during start-up. Amplified output pressure derived from amplifier 11 enables a check valve 27 to close the overflow during operating intervals, and this pressure is trapped at the end of an operating interval to keep check valve 27 enabled and the overflow closed during inoperative intervals. Absence of amplified output pressure, which occurs when a delivery valve 17 opens on demand, overrides or disables check valve 27, opening the overflow line 20 and allowing amplifier 11 to start-up.