Abstract: A wobble plate compressor in which the output of the compressor is modulated in response to refrigeration requirements by varying the compressor piston displacement to match the cooling requirement. An expansible chamber power unit including a sleeve surrounds the drive shaft in sealing relation therewith for axial movement with said sleeve including a wobble plate connected thereto for pivotal movement relative to the shaft. The wobble plate angle is varied during the axial movement of the sleeve by means of a drive lug on the drive shaft having a cam track therein connected in rotary driving relation to cam follower means on the wobble plate. The cam track opposite ends define respectively, maximum and minimum stroke lengths for each of the pistons whereby under controlled pressure conditions the force system results in the pistons tending to go to their full stroke positions.

Abstract: A refrigerant compressor in a wobble type suitable for air-conditioning systems for automobiles, in which pistons are reciprocated within respective cylinders by a wobble plate member driven by a wedge-shaped rotor member which is secured on a drive shaft. Needle thrust bearing assemblies are disposed between an inner surface of an end plate of a compressor housing and an end surface of the wedge-shaped rotor member and between an inclining end surface of the wedge-shaped rotor member and an end surface of the wobble plate member.

Abstract: A brake lock knob assembly comprising a bushing disposed to bindingly engage an axially inserted shaft end portion and having a first frictional brake surface disposed in releasable resilient engagement with a second frictional brake surface of an adjacent nonrotatable member, and an axially movable knob shell having an inwardly projecting portion disposed to disengage the brake surfaces and having interlocking means for rotatably engaging the bushing.

Abstract: A signal is transmitted from a oscillatable piston to a valve by a mechanism comprising a first link pivotal about a second axis and a second link pivotal about a third axis which is perpendicular to the second axis. The second link abuts the first link on both sides of the second axis to transmit motion from the first link to the valve.

Abstract: The present invention relates to constant stroke reciprocating piston pump with mechanically driven diaphragm coupler, including combination of adjustable pressure control means and priming valve for handling abrasive liquids such as paint, and texture.

Abstract: A self-priming centrifugal pump including a priming piston disposed in a priming chamber which communicates with the pumping chamber to receive fluid therefrom. During priming, the priming piston is driven by the impeller shaft through an eccentric to discharge such fluid from the priming chamber. During normal operation of the pump, that is after the pump has been successfully primed, the priming piston is retained out of driven relationship with the eccentric by fluid supplied from the pumping chamber, thereby preventing the priming piston from taking power from the pump during such normal operation.

Abstract: A hydraulic control device for protecting a drive from excess loading conditions includes at least one pump having adjustable members for controlling the quantity of fluid transported by the pump. A pressure-responsive control slide is mounted for movement relative to a housing and is moved towards respective positions, each of which corresponds to a normally loaded condition of the drive by a control pump which generates a pressure force which is indicative of the rpm of the drive at normally loaded conditions. The device further includes an arrangement for securing the control slide when the drive is subjected to loads in excess of the respective normally loaded conditions so that a valve member is permitted to move in response to excess loads relative to the control slide after the latter has been secured in said respective positions by the securing arrangement between switching positions in which the adjustable members are operative to adjust the quantity of fluid being transported by the pump.

Abstract: A valve device for controlling fluid flow into and out of the working chamber of a reciprocating pump. A valve body axially receives the pump connecting rod and includes circumferentially extending, alternately arranged, intake ports and exhaust passageways. Seats are formed on opposed sides of the main body, and a spring-loaded plate abuttingly engages the seats.An outwardly directed annulus circumferentially extends about a central,, marginal portion of the main body and communicates with the inlet port by means of an outwardly directed cavity which is formed by milling a crescent-shaped portion of a cylinder having an outer peripheral edge portion which intersects the centerline of a vertically disposed, constant diameter port, while the centerline of the axial passageway, port, and cylinder lie along a common line drawn normally to the longitudinal central axis of the valve body.

Abstract: A pressure intensifying apparatus to deliver a very high pressure stream of water through a nozzle. There is a single working piston having two pressure surfaces of a relatively large area, the working piston being connected to two high pressure pistons each having a pressure surface of a relatively small area. A control valve delivers a high pressure working fluid alternately to opposite sides of the working piston to cause it to reciprocate so that the pressure pistons alternately deliver water at high pressure to the nozzle.

Abstract: A control system for preventing over-pumping of wells using submersible pumps. When the pump lowers the level of the water in the well, the control automatically diverts some or all of the water pumped back into the well to assure that sufficient water is available in the well for pumping. In this way, pump cavitation is eliminated and water is pumped from the well either at a rate equal to the capacity of the pump or, if the flow of water into the well is less than the capacity of the pump, at a rate equal to the flow of water into the well.

Abstract: A portable air compressor unit includes a sound attenuating enclosure formed to have a first compartment through which cooling air flows before passing through side-by-side mounted heat exchangers for engine coolant and compressor injection liquid. Engine and compressor inlet air filters are disposed in the first compartment. An engine driven fan draws cooling air from the first compartment into a second compartment containing the engine and compressor. An engine inlet air silencer and exhaust gas muffler are also disposed in the second compartment. Heated cooling air is discharged from the second compartment into three side-by-side ducts at the end of the enclosure opposite the first compartment. Exhaust openings in the end and side walls of the enclosure provide for final exit of the cooling air from the enclosure above the level at which cooling air enters the first compartment.

Abstract: A servomechanism for pump capacity control includes an adjustable throttle of the "nozzle-gate" type formed with two operating slots communicating through two fixed throttles with duct, a source of supply feeding the duct, an input signal converter whose movable element is connected to the gate of the nozzle-gate throttle and a four-slot, five-line distributor whose control spaces are in communication through two fixed throttles with the duct of the source of supply, two operating slots being formed in the adjustable throttle, whereas its operating spaces communicate with the corresponding spaces of an actuating hydraulic cylinder. The latter is connected to the control element and, by a mechanical position feedback, to the gate. The mechanical position feedback is constituted by a bar which is linked to the movable element of the hydraulic cylinder and has a slanted surface. The slanted surface interacts with a spring-loaded pusher, whose springs act on the gate.

Abstract: Two hydraulic pressure intensifiers are coupled in parallel between a source of hydraulic fluid at relatively low pressure and an output path. Each intensifier provides a pressurizing stroke in only one direction of linear reciprocation. The intensifiers are so operated, under the control of a hydraulic circuit, as to create a tendency for an initial portion of the pressurizing stroke of each of the intensifiers to overlap a final portion of a preceding pressurizing stroke of the other intensifier, and thereby to deliver high pressure hydraulic fluid to the output path simultaneously with continuing delivery from such other intensifier. Such simultaneous delivery does not actually occur, however, since the hydraulic circuit is so arranged that the delivery of high pressure hydraulic fluid from each intensifier to the output line can begin only upon a falling off in the pressure provided by the other intensifier.

Abstract: A distributing valve for twin cylinder pumps for pumping viscous materials such as concrete, has an oscillating body with closing elements, for the suction orifices and pressure orifices for the pump cylinders mounted on a shaft disposed outside the part of the pump casing acted upon by the pump pressure. The closing elements are arranged on the same side of the rotating shaft and a pair of closing elements is provided either for the suction orifices or for the pressure orifices.

Abstract: In a hydraulic system having a plurality of variable displacement pumps driven by a prime mover, each pump has a variable ratio input device connected to a load sensing means. Each variable ratio input device automatically reduces the displacement of its respective pump by the same proportion when the prime mover is overloaded irrespective of the displacement setting of the pump and automatically increases the displacement of its pump by the same proportion up to the set displacement when the prime mover is not overloaded.

Abstract: A protection system to prevent the failure of a flywheel caused by an overspeed condition of a fluid pump. A positive displacement pump is coupled to, and driven by, the drive shaft of the fluid pump, and the positive displacement pump circulates a fluid into a discharge manifold. The fluid exits from the discharge manifold through an orifice, and returns to the positive displacement pump to be recirculated. Brake shoes are arrayed around the flywheel, and are connected to hydraulic cylinders, which in turn is connected by conduits to the discharge manifold. A pressure sensitive valve is installed in the conduit between the discharge manifold and the hydraulic cylinder. The pressure sensitive valve permits fluid to flow from the discharge manifold to the hydraulic cylinder whenever the pressure within the discharge manifold exceeds a predetermined level.

Abstract: A hydraulic power system having a plurality of variable displacement pumps for supplying pressurized fluid for manipulation of one or more implements includes control means operative to automatically adjust pump displacement to the output horsepower of a prime mover driving the pumps of the system. The control system includes an underspeed valve responsive to a deviation in the speed of the prime mover from any of a wide range of selected speeds to transmit a fluid pressure signal to servocontrol means for adjusting the displacement of the pumps. The underspeed control means includes an infinitely variable orifice connected by way of lost motion linkage to the engine throttle control for adjusting the underspeed valves to respond to a deviation of an infinite range of engine speeds.

Abstract: A hydraulic power system having a plurality of variable displacement pumps for supplying pressurized fluid for manipulation of one or more implements includes control means operative to automatically adjust pump displacement to the output horsepower of a prime mover driving the pumps of a system. The control means includes an underspeed valve responsive to a deviation in the speed of the prime mover from any one of a wide range of selected speeds to transmit a fluid pressure signal to servo control means for adjusting the displacement of the pumps in proportion to engine output. The control means includes an infinitely variable orifice adjustable with throttle movement for adjusting the underspeed valve to respond to a deviation from a wide range of selected engine speeds.

Abstract: An improved pump for pumping both low viscosity and high viscosity fluids, which contains therein a body with three cavities, a hollow cylinder fitting in the first cavity and attached at its lower end, a hollow cylinder head containing therein a first valve means; having in the second cavity of said body of said pump a second valve means with a shaft positioned at the top end of said hollow cylinder such that said first valve means and said second valve means are positioned to ride freely on said shaft. Finally, a kick plate means positioned at the end of said shaft and located such that it can move freely within said third cavity means. When the pump is pumping high viscosity fluids it is the function of the kick plate means to push or force the high viscosity fluid up from said third cavity into the second cavity and then through the hollow cylinder head into the first cavity means and out through the outlet means in said pump.

Abstract: The pressure acting on a pressure loaded cheek plate in a pump is selectively vented by a servo valve actuated by the buildup of pressure in the pump outlet caused by normal parasitic losses in a downstream hydraulic flow circuit. Since it may be desirable to actuate the servo valve by the pressure drop across an orifice in the outlet line or by a suitable orifice in the pump return to pump, both embodiments are disclosed as exemplary means for achieving the premises of this design.