Abstract: A rotary machine having two meshing rotors (14,15) rotatable in intersecting bores (12,13). The bore walls are provided with a number of electrical windings (18,19) being stator windings of an electric motor in which the pump rotors (14,15) are the rotors of the electric motor. The electrical windings are connected to an inverter which creates rotating magnetic fields which rotate the rotors.

Abstract: A peristaltic pumping mechanism comprises a pump housing for holding a peristaltic drive means and adapted to support the drive motor for the peristaltic means. The mechanism further comprises a base member formed with an orifice having a periphery with a plurality of protrusions positioned therealong. The base member receives the housing in the orifice with a lip on the housing resting on the protrusions. The mechanism further comprises a cover which has an edge and a plurality of grips positioned along its edge for insertion between the periphery of the orifice and the lip of the housing to engage the grips with the base member and clampingly hold the housing and its associated peristaltic mechanism between the cover and the base member.

Abstract: A compressor cylinder head assembly for a compressor which has a crankcase and a plurality of cylinders disposed in the crankcase. Each valve plate is spaced from the cylinder head by a valve plate gasket which is selected to have a thickness to provide the proper amount of clearance between the top of the piston and the valve plate to thereby keep the cylinder clearance in a predetermined range.

Abstract: A pump with a continuous inflow and a pulsating outflow comprises a first chamber and a second chamber with a passage between them and made at least partly from a flexible material. There is an inlet to the first chamber and an outlet from the second chamber. The passage between the chambers has a one-way valve permitting flow only in a direction from the first to the second chamber. A second one-way valve located at the outlet permits flow only in a direction out of the second chamber. The chambers are movably supported in a pump casing having a first and a second opening. The inlet is connected to and penetrates the first opening, and the outlet is connected to and penetrates the second opening. A drive arrangement reduces the volume of the second chamber to expel the pumped medium while simultaneously enabling the walls of the first chamber to increase the volume and permit the pumped medium to flow through the inlet into the first chamber.

Abstract: The hose pump has plates forming the first pressure members and limbs which form second pressure members and which are actuated by the plates. The limbs are fastened at one end to a base plate, in such a way that second portions formed at the other ends are parallel to and near one another and the surfaces, facing one another, of the middle portions are inclined towards one another, in order to move the limbs to-and-fro by means of the projections of the plate. By means of resilient elements which on the one hand rest against webs in the frame and on the other hand against the plate, the plate is held in contact with the drive. As a result of these measures, the efficiency and the effect of the hose pump can be improved.

Abstract: A dewatering pump assembly including a rotatably supported reel about which a flexible conduit is wound and which passes from the reel through a driven roller assembly to be attached at one end to a hydraulically driven pump assembly which is lowered into a bore hole or the like. Hydraulic supply and exhaust lines pass through the conduit to the hydraulic motor of the pump assembly and the driven roller assembly includes a plurality of pairs of cooperating rollers arranged to arcuately bend the conduit and direct the conduit between the bore hole and the reel.

Abstract: A small fan which is constructed as compact axial fan with a central driving motor retained by way of a flange and a bearing support tube, and in which the housing of the fan forms a flow duct that surrounds the rotor; the bearing support of the shaft of the driving motor is constructed as one-piece slide bearing unit which is secured radially in an axial partial area of the bearing support tube by a sliding seat; the bearing support tube consists of a material which can be injection-molded.

Abstract: A controlled replenishing lubrication system provides a desired supply of oil to a rolling element bearing by monitoring the changes in the rolling element ball retainer to shaft speed ratio. This ratio is a function of elastohydrodynamic oil film thickness between elements of the bearing. Changes in the speed ratio are monitored by a sensor and fed to a control system which commands a pump to inject oil into the bearing when the speed ratio varies from a predetermined limit. The rolling elements are moveably mounted for rotation within a retainer or cage in a bearing housing. The retainer includes a light reflective indicia. A shaft is rotatably connected to rotate the retainer and the rolling elements. The shaft also includes a light reflective indicia. The sensor is mounted on or adjacent the bearing for simultaneously emitting light toward the retainer and shaft indicia for sensing variations in reflection of the light therefrom and for generating pulses to the control system responsive to the variations.

Abstract: A pump is disclosed in which high pressure air overcomes a valve spring and displaces a flexible partition to isolate a pump fluid volume. The pressure air then drives the fluid along a conduit.

Abstract: A linear peristaltic device for pumping medical solutions to a patient comprises a hinged pivot or hinged attachment between the peristaltic drive mechanism and its associated platen. An IV tube, through which the medical solutions are to be pumped is received and held between the peristaltic drive mechanism and the platen during operation of the device. The device also includes a compliant means which normally urges the peristaltic mechanism toward the platen but which yields, as necessary, to limit the force the peristaltic mechanism can exert against the tube.

Abstract: A multiple cylinder rotary compressor according to the present invention comprises a driving shaft, cylinders concentric to the driving shaft, rotors driven by eccentric portions of the rotary shaft to rotate along the inner circumferential surface of the cylinders, vanes for dividing each of the cylinders into a compression side and a suction side, a partition plate for separating the cylinders from each other, and a control through-hole for connecting the cylinders with each other so that a refrigeration capacity is controlled.

Abstract: A vane type pump suitable for a hydraulic system comprises passages communicating with the underside of the vanes in the inlet quadrant with the surrounding of the drive shaft and passages communicating the underside of the vanes in the discharge quadrant with the discharge chamber, thereby the underside of the vanes can act as a set of additional little pumps while being ineffective at zero pressure. The undervane pressure in the inlet quadrant can be tested and adjusted at any time during the operation by a manometer and an auxiliary valve. The vane type pump in accordance with the present invention is adapted to various viscosities of fluid such as 1-38 cst, 50.degree. C., and it is possible to work at negative pressure without keeping the reservoir a certain relative height and without replacing the inner component. The pump works at a high volumetric efficiency and total efficiency all the time.

Abstract: An improvement in automotive fuel pump assemblies of the type including a tubular cylindrical housing, an electric motor in the housing and a pump in the housing driven by the armature of the motor. The pump includes a first pump body adjacent a flux ring of the motor, a second pump body between the first pump body and the end of the tubular housing, and an impeller in a cavity between the pump bodies. The improvement resides in the provision of axially extending grooves in outer cylindrical surfaces of the pump bodies which register in only a single predetermined angular positional relationship of the pump bodies and in the provision of spring clips which fit in the registered grooves to maintain the predetermined positional relationship and to unitize the pump bodies for efficient handling prior to insertion in the tubular housing.

Abstract: A balancing plate for rotor valved gerotor motors is disclosed. The balancing plate is mounted on the opposite side of the high pressure rotor valving input with its own connection to high pressure to compensate for the pressure imbalance in the device.

Abstract: The reciprocating pump is provided with a sleeve between the piston and the casing. The sleeve is disposed in spaced relation to define an annular gap both with respect to the piston and with respect to the casing. The sleeve is also biased by a spring into sealing engagement with the end wall of the casing. The end of the sleeve adjacent to the spring provides a permanent connection between the gap between the casing and sleeve and the pressure medium used to drive the piston of the pump so that the same pressure prevails on the inside and outside surfaces of the sleeve.

Abstract: A valve assembly for controlling discharge of hydraulic fluid from a high pressure hydraulic fluid container to a hydraulic fluid reservoir and including a valve body having a valve bore, a fluid inlet port communicating with the valve bore on one side of a valve seat, and a fluid outlet port communicating with the valve bore on an opposite side of the valve seat. A valve spool is housed in the valve bore and includes a valve member selectively engageable with the valve seat to prevent hydraulic fluid flow through the valve bore. The valve member is selectively biased against the valve seat by a valve piston housed in a valve cylinder, the valve piston being operably connected to the valve member such that hydraulic fluid pressure in the valve cylinder biases the valve member toward the valve seat.

Abstract: A fluid pressure intensifier device particularly suited for intensifying the pressure of a gas has a plurality of piston and cylinder compression stages of sequentially reducing volume connected by flow passages (FIG. 5b) for conducting fluid to be pressure intensified sequentially through the compression stages. Individual pressure fluid powered driving mechanisms for each piston or cylinder compression stage comprise driving piston and cylinder assemblies controlled to operate in sequence by a rotatable port plate. The port plate is rotatable by a positive displacement pressure fluid motor actuated by the pressure fluid powering the driving piston and cylinder assemblies, the outer gear of the motor being constituted by the rotatable port plate.

Abstract: A pneumatic pump has provision for being driven by a conventional electric hand drill and chuck that are un-modified so that they can be detached by loosening the chuck jaws and used for other purposes. The provision includes first and second input shafts protruding at right angles to each other and connected by a bevel gear on each. In addition to improving drive access, to provide a choice of drive ratios, the bevel gears have different diameters. The rotary output of the shaft and bevel gear arrangement drives a reciprocating piston in a cylinder that, in association with check valves and a hose connection, can inflate a pneumatic tire, at a speed and to a pressure, determined by which drive ratio is chosen. The drill can be freely swiveled about either input shaft to which attached. A gauge indicates cylinder pressure. A frame permits the assembly of drive and pump to be used to pressurize a tank for storage of compressed air.

Abstract: An apparatus and method for raising liquids from one level to a higher level by means of a centrifugal pump operating in air for minimum drag, is described. A sealed tank is half filled with liquid and the remaining space is subjected to an externally applied pressure, thereby raising the liquid in a tank exit tube to a height determined solely by the pressure in the tank. Further liquid is introduced into the tank, against the pressure therein, by means of a rotating inlet tube provided with a plurality of radially extending exit tubes which rotate about a vertical axis in the air space above the liquid in the tank. The inlet tube is rotated by means of an electric or other power source located either internally or externally of the tank.

Abstract: A flashlight which can be operated directly either by a rechargeable batt or by a hand-cranked alternator. The alternator can also simultaneously operate the light and recharge the battery, or only recharge the battery. The alternator is integrally attached to a harmonic drive system which allows the alternator rotor to be driven at high speeds.