Rectilinearly Reciprocating Cylinder And Piston-type Pump Patents (Class 417/399)
  • Patent number: 4339233
    Abstract: A power-assisted valve is provided which is particularly effective for systems handling viscous materials, such as certain metering systems. The check valve operates effectively even with highly-filled viscous resins used in such systems. The valve includes a valve seat and a valve ball which can be urged toward the valve seat to a closed position by a fluid-powered cylinder and piston. The piston rod is separate from the valve ball so that the ball can rotate relative to the valve seat.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: July 13, 1982
    Inventor: Wallace F. Krueger
  • Patent number: 4309152
    Abstract: The invention is an efficient hydraulic motor/pump whose mechanical advantage can be varied while it is operating. Preferred embodiments described include a multi-cylinder reciprocation motor/pump, a variable level power extraction system used with a wave generator, a hydraulic transformer and a hydraulic autotransformer.
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: January 5, 1982
    Assignee: Sea Energy Corporation
    Inventor: Glenn E. Hagen
  • Patent number: 4260107
    Abstract: A hydrostatic spraying system with multiple spray booms for use with vehicles is especially suited for spraying agricultural treatment liquids such as fertilizers, herbicides, insecticides, trace minerals, etc. The system includes an operator-controllable variable displacement hydraulic pump driven by the vehicle, e.g., via its transfer case. A linear hydraulic motor is powered by the pump, being operated at a speed dependent upon a preselected output of the variable displacement pump and the rate of ground travel. Solenoid-controlled valving alternately supplies the hydraulic fluid to opposite ends of the linear motor for oscillating stroking operation of the motor.
    Type: Grant
    Filed: November 27, 1978
    Date of Patent: April 7, 1981
    Inventor: Clarence L. Jackson
  • Patent number: 4167373
    Abstract: A fuel injection pumping apparatus comprises a displacement piston which is located within the cylinder, an outlet from one end of the cylinder and a fluid pressure operable member mounted within a further cylinder for actuating the piston and causing fuel to be delivered through the outlet. Means is operable upon movement of the displacement piston to a predetermined position to terminate delivery of fuel through the outlet and valve means is provided to control the application of fluid under pressure to the fluid pressure operable member.
    Type: Grant
    Filed: April 30, 1974
    Date of Patent: September 11, 1979
    Assignee: C.A.V. Limited
    Inventors: Boaz A. Jarrett, Paul Lakra
  • Patent number: 4163632
    Abstract: A hydraulic pump assembly having a motor actuated by a source of fluid under pressure and in turn actuating a fluid pump under the control of a valve responsive to operation of the motor. The diameter of a piston of the pump is smaller than the corresponding diameter of a piston of the motor in order to permit the pump to obtain higher output pressures than are required to actuate the motor. The valve includes a valve element connected directly to the piston of the motor and slidably disposed in a pair of axially spaced, cylindrical housing parts so as to sequentially place ports provided in spaced ends of the valve element in communication with passages provided in the cylindrical housing parts.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: August 7, 1979
    Assignee: Bessie L. Caldwell
    Inventors: Leslie R. Hinchman, Robert B. Hinchman, Sr.
  • Patent number: 4141675
    Abstract: A fuel pump for providing fuel at relatively high pressure is activated by gas pressure, created during the compression stroke of an internal combustion engine. The pump includes a piston and a hollow plunger which are biased by a single spring in opposite directions. The piston, which is exposed to gases in the engine's cylinder, is urged, by the gas pressure in the cylinder during the compression stroke, to move upwardly. A limit is placed on the piston's upward stroke. When reaching the upward limit the pressure which is applied to fuel in a fuel chamber is only a function of the force applied by the spring to the plunger. When fuel ejection is enabled, the spring pushes the plunger toward the fuel chamber to eject the fuel therefrom. Toward the end of the exhaust stroke the piston moves toward the engine cylinder, forcing the plunger to move in the same direction until the latter's travel is limited by limiting means. Fuel is then injectable into the fuel chamber for subsequent ejection.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: February 27, 1979
    Assignee: Physics International Company
    Inventor: Cormac G. O'Neill
  • Patent number: 4140440
    Abstract: This invention relates to internal combustion engines, the energy output of which is produced as hydraulic pressure, and in one embodiment comprises two, two-cycle internal combustion engines which face each other, the piston rods of each of which are axially aligned and are linked to both of the axially aligned drive pistons of two hydraulic pumps which also face each other by means of four connecting rods of equal length, the axis of the pump rods being at right angles to that of the engine rods, and associated hydraulic circuitry which includes means for selectively initiating the compression phase of the engines when their respective pistons have thrust outward toward each other to such an extent that the angle between the axis of each of said piston rods and its associated connecting rods has passed through a right angle and said rods would otherwise be retained in said extended position through force exerted on said connecting rods by the pistons of the hydraulic pumps.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: February 20, 1979
    Assignee: Hydraulic Engine Development Group
    Inventor: James J. Ferris
  • Patent number: 4138931
    Abstract: A hydraulic pump is provided which includes a plurality of housings, each of which has an upright cylindrical cavity formed therein, and a plurality of plungers, one for each cavity. The housings are removably mounted on a common support and the plungers are removably mounted on a common actuating member which is adapted to move in a linear path relative to the support and simultaneously move the plungers relative to the housing cavities.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: February 13, 1979
    Assignee: G. D. Searle & Co.
    Inventors: William G. Hermann, Manuel I. Martin, Rolf Meyer
  • Patent number: 4102609
    Abstract: A source of fluid, regulated as to pressure intensity before entry into a control valve assembly, drives a fluid biased piston motor. A mechanically actuated and fluid held valve in the control valve assembly controls pressurization of a pressure chamber in the piston motor displacing the motor piston through its return stroke. Pressure differential on opposite sides of a fluid operated valve actuator insures rapid opening of the valve and holding thereof in its open position during the motor piston return stroke. At the end of the return stroke, the pressure differential is eliminated to allow spring-biased closing of the valve and venting of the pressure chamber.
    Type: Grant
    Filed: December 28, 1976
    Date of Patent: July 25, 1978
    Assignee: Wood's Powr-Grip Co., Inc.
    Inventor: Howard L. Wood
  • Patent number: 4098560
    Abstract: A fuel injection system for an internal combustion engine is described, which provides for independent, flexible control of timing as well as quantity of fuel injected. The system is programmable for torque shaping and adaptable to a wide range of engine sizes. It uses piezoelectric valves for controlling injection timing, a shuttle, fuel meter and a gas driven high pressure pump for injecting the fuel into the cylinders.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: July 4, 1978
    Assignee: Physics International Company
    Inventor: Cormac G. O'Neill
  • Patent number: 4025124
    Abstract: A piston pump with a controllable stroke is described. It is a positive displacement type pump with several stages and also a continuous variable stroke. The pump piston is only effectively connected with the drive during the working stroke. For example, the pump serves particularly for controlling the braking force in an anti-locking system for vehicles. In every pump cycle it can vary the volume in the braking system, and thus the brake force, without letting fluid out of the brake system. It makes possible the amplitude control of brake pressure pulsations and a desirable brake pressure course. In addition, an anti-locking system with a special two-stage pump device is described. Furthermore, a hydraulic circuit of great utility for anti-locking systems is shown.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: May 24, 1977
    Inventor: Werner Karl Heinz Fuchs
  • Patent number: 3995974
    Abstract: This hydraulic engine utilizes two sets of hydraulic cylinders connected to a shaft so as to be alternately pressurized as the shaft is reciprocally driven by a pair of conventional internal combustion chambers. The outlets of all hydraulic cylinders are connected to a common output line via valves. During each power stroke certain of the hydraulic cylinders being pressurized are selectively disconnected (depressurized) from the output line. This effectively decreases the load on the driving chamber, and insures a relatively constant, high pressure hydraulic fluid output level despite changes in supplied force during each power stroke. The selective cylinder disconnection may be implemented programmatically in response to changes in engine parameters such as combustion chamber pressure. The engine also includes a pump for supplying input hydraulic fluid to each set of cylinders while that set is not being pressurized. The input fluid force is additive to the power supplied by the operative combustion chamber.
    Type: Grant
    Filed: September 18, 1974
    Date of Patent: December 7, 1976
    Inventor: Allen R. Herron
  • Patent number: 3932065
    Abstract: A pneumatically controlled liquid transfer system for delivering a liquid from a source to a delivery location, said liquid source being provided with a pneumatic cylinder for driving the liquid from said source, a pneumatically operated pinch valve of the make-before-break type and flexible conduit paths leading through the valve to the delivery location. The make-before-break pinch valve comprises a valve shell having two pistons movable laterally therein. The shell has a window. One piston has a yoke, each arm thereof having a passageway, one aligned with the other. A stop extends between the arms of the yoke. One of the flexible conduits is arranged through the window between the first piston and the yoke and the other flexible conduit is arranged also through the window but within the aligned passageways and between the piston and post. The second piston is spring biased to bear against the second conduit to place same in a normally closed condition. The first conduit is normally open.
    Type: Grant
    Filed: November 8, 1974
    Date of Patent: January 13, 1976
    Assignee: Coulter Electronics, Inc.
    Inventors: Guenter Ginsberg, Thomas John Godin, Ronald Olin Simpson