Abstract: Mounted on a mobile platform, a dual hopper mixing tank having a hydraulically operated slide gate controlling the exit of a slurry. The mixed slurry is gravity fed to a pair of hydraulically operated pumps with the stroke of the pistons therein controlled by a reed switch or an IC chip. An outlet nozzle end from the pumps leads to a Y-shaped hose for supplying slurry continuously to a work site.

Abstract: This invention is a multi-stage compressor embodying a stepped piston in a stepped cylinder and connected through a coaxial rod to the piston of an engine. Control means in a passageway or a conduit extending from the second or third stage discharge of the compressor or any other source of pressure to a single bounce chamber, responds to pressure in the bounce chamber to increase or reduce gas pressure in the chamber, to balance the energy and work quantities acting in opposite directions to provide optimimum operation of the compressor at varying pressures.

Abstract: Anesthesia or respirator apparatus is disclosed for supplying a gas stream to a patient, including a ventilator for delivering the gas stream, including an inhalation conduit and a compressible bag or bellows, with the gas stream being in contact with the inner surface of the compressible bag and with its outer surface being in contact with a propellant gas stream so that an increase in pressure in the gas stream within the compressible bag can be created by application of the propellant gas against the outer surface of the bag, and including a manual pump associated with the propellant gas stream so that increased pressure can be created in the propellant gas stream, thus resulting in application of the propellant gas stream against the outer surface of the bag, by actuation of the manual pump, and a resultant increase in the pressure in the gas stream within the bag, in turn resulting in an increased flow of the gas stream through the inhalation conduit to the patient.

Abstract: Two concentric vertical cylinders are separated by three radial partitions. An opening at the bottom of one of the partitions connects an air cell on one side of the partition with an outlet chamber on the other side of the partition. The two other partitions form sides of an inlet chamber, which receives fluid from outside the outer cylinder. The inner cylinder has a central pumping section positioned between upper and lower valve sections. In the valve sections ports extend through the inner cylinder wall to the inlet and outlet chambers. Spring loaded valves close the ports. Tension springs extend across the inlet chamber or compression springs extend across the inner cylinder to close the inlet valves. Tension springs extend across the inner cylinder to close the outlet valves. The elastomeric valve flaps have rigid curved backing members. A piston rod extends through one end cover to move a piston in the central section.

Abstract: A positive displacement device capable of performing the typical positive displacement device functions such as pump, generator, flow meter, etc. is presented. The device comprises a housing having interior surfaces defining an inlet and an outlet separated by two generally circular cylindrical fluid flow chambers. A fulcrum is near the center of the device. A positive displacement barrier separates the inlet from the outlet. The barrier which is the only moving part comprises two circular cylindrical pistons coupled by a generally planar plenum barrier. The plenum barrier slides back and forth and teeter totters on a fulcrum so that each piston is always sealing the inlet from the outlet along the inside of its associated cylinder while each piston orbits its cylinder in a different direction. Fluid is caused to move around the piston by the piston and its sealing point.

Abstract: A liquid supply pump adapted for coupling to a reciprocable motor, particularly for pumping liquids having thermosetting properties. The pump incorporates a double-acting piston in a pumping cylinder, driven by an elongated drive shaft which projects from the top of the pump for reciprocable motion, the pump having a lower intake valve and an upper exhaust valve, and an intermediate drive shaft seal above the pumping cylinder and a liquid and air drive shaft seal proximate the point of projection of the drive shaft from the pump, wherein said two seals are spaced apart by a distance greater than the pump stroke length, and a liquid drainage path from the intermediate seal back to the pump intake region.

Abstract: An energy-conserving refrigeration apparatus which employs a atmospheric pressure and vacuum-pressure actuated partial compressor for a refrigerant gas in combination with a conventional prime mover-driven compressor and also achieves lower compressor head pressure and increased condenser cooling of the refrigerant gas.

Abstract: A solenoid drive apparatus for driving a lead screw of an External Infusion Pump (1) having a housing (302), solenoid winding (356) within the housing (302), a solenoid armature (358) which is driven by the field of the solenoid winding (356), push rod (362) which is driven by the armature (358), pawn (314) which is driven by push rod (362), a first pawl (320) which is driven by pawn (314) and a second pawl (326) which is an antibacklash device, a ratchet wheel (318) having teeth (319) around its periphery and engaged by the first pawl (320) and the second pawl (326) and the drive shaft (316) which is drawn by the ratchet of the ratchet wheel (318).

Abstract: An air compressor with a cylinder (1) has a stepped piston (4) movably disposed therein which performs compression in both stroke directions to provide two-stage compression. Each compression stage is associated with at least one inlet and outlet valve (34, 36 or 35, 37), whereby one outlet opening (22) of a lower compression stage is connected with an inlet opening (20) of a higher compression stage. All valves (34-37) are disposed on the upper side of the compressor in the vicinity of the cylinder head (13; 30). The compressor has few individual parts and the valves are easily accessible for maintenance.

Abstract: A rotary pump for pumping liquid which includes a rotor combination in the form of a vane pump or gear and rotor with pumping chambers disposed circumferentially around the rotor. The chambers progressively increase in the inlet area and ensmall in the outlet area. Pulse absorbtion means are interposed in the fuel passage means to absorb pulses and smooth out the pressurized outlet liquid, thus reducing the pump noise under all conditions of operations.

Abstract: A blade for a pump means of the type comprising a rotor rotatably supported within a housing with its center line being eccentrically disposed with respect thereto and a number of blades each shiftably received in respective radial slots formed in the rotor is disclosed. The base body of the blade is constituted from a solid lubricating material such as graphite and only its axial end surfaces are covered by layers of a synthetic resin which has excellent wear resistance, excellent heat resistance, and a low coefficient of friction.

Abstract: In a vane compressor, a liner formed of iron or an alloy thereof is disposed along the endless camming inner peripheral surface of the cylinder forming part of the pump housing. The liner has at least one break extending thereacross and has its whole surface elastically permanently urging the cylinder in the radially outward directions. The use of the liner permits forming the rotor and the cylinder of aluminum or an alloy thereof. Preferably, the cylinder has its camming inner peripheral surface formed with a pair of elongate recesses extending parallel with the axis of the rotor and diametrically symmetrically arranged. The recesses are supplied with pumped compression fluid. The liner is partially urged by the rotor and located in the above recesses to maintain fluid tightness between the suction side and the discharge side in the pump housing.