Abstract: A compressor has flat cylinder heads in which circular valves are disposed. The valves are of the type having a slotted valve seat and a slotted valve guard, with elongated valve elements disposed between the seat and the guard to open and close the slots of the valve seat. The flat circular valves are perpendicular to the piston axis and extend substantially farther from the piston axis than does the piston and so directly overlie only a portion of the piston. Therefore, the slots are provided only on the radially inner portion of the valve, the radially outer portion being imperforate. This enables the valve to be used with pistons of different diameters and under various conditions of operating pressure. Also, the cylinder liner is provided with a port at the intersection of its cylindrical inner side wall and its end wall that confronts the valve, whereby part of the clearance volume extends radially outwardly under those slots which would otherwise be masked by the liner.

Abstract: A bottom hole well pump comprising a pump housing supported by a control cable for raising and lowering the housing within tubing in a well, a linear motor within the housing causing reciprocation of a plunger extending into a pumping chamber formed by the housing with inlet and outlet check valves for controlling flow of oil or other liquid into the pumping chamber and from the pumping chamber into the tubing above the pump housing. In one embodiment, Belleville-type springs are employed for storing energy as the plunger approaches its opposite limits of travel in order to initiate movement of the plunger in the opposite direction. In this embodiment, a single pumping chamber is formed above the linear motor with a single-valve block arranged above the pumping chamber and including inlet check valve means for controlling liquid flow into the pumping chamber and outlet check valve means for controlling liquid flow from the pumping chamber into the tubing interior above the pump housing.

Abstract: A high pressure fluid pump for use such as a fuel injection pump. The pump utilizes a diaphragm for cooperation with valve controlled passage structure leading to the pump chamber to provide the desired high pressure output. The diaphragm is defined by one portion of a diaphragm element, which portion is sealingly bonded peripherally to the wall of the valve body defining the valve chamber. A second portion of the diaphragm element formed unitarily integrally with the diaphragm portion is free to move in the valve chamber and includes a portion extending into a plunger bore for transmitting forces from a reciprocating plunger having an inner end extending into the bore to the diaphragm. The plunger further is provided with a synthetic resin tip. The plunger and tip are arranged to be lubricated during reciprocation of the plunger.

Abstract: A multi-cylinder pump for delivering fluids under high pressure which includes a multi-lobed camshaft having bearing supported yoke elements disposed in an oil-filled crankcase for coupling the camshaft to plural piston elements such that displacement of the plural piston elements occur in a desired phase relationship and improved sealing arrangements disposed between the piston and the cylinders, between the suction inlet port and the high pressure outlet port and between the cylinders and the oil-filled crankcase to prevent cross-contamination of the oil lubricant and the fluid being pumped and to prevent any substantial leakage between the high pressure outlet port and low pressure inlet port during the suction and pressure strokes of the pistons.

Abstract: A reciprocating adjustable stroke positive displacement fluid pump is provided with an expandable chamber driven in the displacement or feed direction by an eccentric drive acting through a driven member. The eccentric drive moves the expandable chamber to its limit of excursion in the displacement or feed direction. Adjustment means cooperating with stop means limits the excursion of the driven member and the expansion of the expandable chamber in the suction or intake direction so that the amount of fluid pumped is continuously adjustable from no volume to the capacity of the expandable chamber by positioning the stop means. The pump is further provided with means for driving a plurality of individually adjustable pumps from the same drive motor and with means for equalizing the load on the pump motor.

Abstract: A pump for moving a fluid, as blood, having a body and end members forming a cylindrical chamber. A free floating piston located in the chamber is moved along the length of the chamber with a solenoid to pump blood into and out of opposite ends of the chamber. The end members containing inlet and outlet valves and sleeves are adapted to attach to veins or tubes to carry the blood to and from the pump. When electrical power is applied to the solenoid, a magnetic force operates to move the piston in the chamber, thereby pumping blood into and out of the chamber through the valves in the opposite end members.

Abstract: A unitary packing especially suitable for use in pumps which transport liquids such as water-based solutions or suspensions includes a generally concave working face having an outer cylindrical annular flange, a generally convex opposed face preshaped for complementary overlying engagement with the working side of a pump piston. The packing, during use, is characterized by substantially reduced stresses and an extended life when compared with conventional packings. The packing may also be structured for occasional axial rotation with respect to the cylinder wall of the pump, which rotation may be enhanced by providing a force-directing element on the concave working face of the packing, this occasional rotation serving to circumferentially reorient the outer cylindrical annular flange of the packing with respect to the inner wall of the pump cylinder to thereby uniformly distribute wear caused by imperfections such as occlusions in the cylinder lining.

Abstract: In a valve where a port is opened and closed by movement of a lamina away from or towards the port, the lamina is held between two adjacent parts of the valve. To ensure that the lamina is held rigidly in place, it is provided with resiliently deformable projections on its side facing away from the port which it is to close.

Abstract: A downhole pump has spaced upper and lower pistons connected together by a common rod so that the pistons reciprocate within a cylinder. The cylinder is separated into an upper and lower engine chamber by a frame supported from the cylinder wall and arranged laterally with respect to the longitudinal axial centerline of the connecting rod. A bushing is positioned centrally of the frame and sealingly engages a reciprocating marginal length of the connecting rod. An exhaust port is formed through the frame in spaced relationship to the bushing. A resilient exhaust valve element surrounds the bushing and includes a lower, circumferentially extending edge affixed to the frame outwardly of the exhaust port and further includes an upper seal end which sealingly engages a marginal external surface of the bushing.

Abstract: A reciprocating pump wherein the plunger is surrounded by a sleeve which has limited freedom of axial movement in the pump body and has a conical end portion adjacent to the lightweight washer-like or hollow frustoconical valving element of a suction valve. When the plunger performs a suction stroke, pressure in the sleeve drops below the pressure at the inlet of the pump body whereby the suction valve opens and allows fluid to flow into the sleeve. The plunger thereupon performs a forward stroke to pressurize the fluid in the sleeve, whereby the suction valve closes, and to expel pressurized fluid through the central opening of the valving element and through a delivery valve which admits pressurized fluid into a plenum chamber.

Abstract: A fuel pump comprises an outer casing, which is made by drawing a steel sheet, caulkedly fitted to a diecast lower body. The outer casing is constricted in three stages. The second stage contains a seal-receiving flange at the open-side end of a cup-shaped inlet chamber shell, so that the inlet chamber shell contacts the inside surface of the outer casing. Also, the inlet chamber shell is brazed to the inside of the top of the outer casing for the purpose of rust prevention. Ribs are projected on the top of the outer casing to decrease its vibration and noise.

Abstract: An annular valve stop insert for a compressor body is shown which has the function of establishing the positional relationship of the valve plate, valve and compressor body.

Abstract: A diaphragm pump is described having a pump chamber fitted with an insert. The insert defines a concave end face positioned closely adjacent the diaphragm of the pump. The concave face of the insert and the diaphragm together define an effective portion of the pump chamber which is swept by the diaphragm when the pump is in use. The insert is formed with inlet and outlet passageways through which fluid flows to and from said effective portion of the pump chamber.

Abstract: Improved valve apparatus for expansible chamber devices, such as reciprocating piston compressors, includes in a preferred embodiment, a chamber having two chamber intake ports, each normally closed by a respective valve member. A first valve member is biased to close a first port, and a second member is more forcefully biased to close a second port which is larger in cross-sectional area than the first port. The first valve member opens the first port in response to an intake pressure differential less than that which will open the second port. Subsequently, and upon increased intake pressure differential, the second valve member opens the second port and reduces the working pressure affecting the first valve. This permits the first valve to positively close its port at or near the end of the suction stroke of the piston, the second valve also closing its port due to the more forceful bias.

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: An integrally cast compressor head includes an air inlet port communicating with a first configurated channel having filter means therein, which channel communicates with a one-way valve coupled to the surface of the head forming the top of the compressor chamber when the head is positioned on a cylinder. The integral head construction further includes a one-way outlet valve communicating with a second channel including a filter element, and an outlet port permitting pressurized air in the compressor chamber to exit therethrough. The improved compressor head construction includes a removable cover plate in sealed engagement with one side of the channels and filter means to permit ready access to the filter elements and the valves without removing the head from the compressor cylinder.

Abstract: A compressor intake valve and control means in the form of an unloader by which the intake valve may be controlled to prevent compression of air and in which the intake valve and unloader means is disposed within the thickness of a flat compressor head. The various movable parts of the unloader and the valve are maintained in guided relationship relative to each other by the surfaces of the head itself and access to the valve portion and to the unloader portion of the assembly are independent of each other.