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Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 4109683 | Throttle valve A throttle valve formed from two jackets each having through bores. Each jacket includes two groups of bores, one group of bores being equally spaced from each other and the other group of bores having an intermediate bore unequally spaced from the outer ... | 08/29/1978 |
| 4106525 | Fluid pressure control A fluid flow restrictor is described having a long path length capable of sorbing energy with less noise generation than that normally encountered with conventional fluid flow restrictors of short path lengths. The restrictor is adapted for attachment bet... | 08/15/1978 |
| 4105162 | Regulated flow-reducing device particularly useful for drip irrigation A regulated flow-reducing device particularly useful for drip irrigation comprises a flow-retarding member disposed in a housing, the member being formed with a circuitous fluid flow pathway defined at least in part by recesses formed in both its opposed ... | 08/08/1978 |
| 4105048 | High energy loss device A more compact high energy loss device is provided having a series of uniquely formed multiturn labyrinth assemblies which reduce the pressure of a fluid flowing therethrough. The inlet of the labyrinth assemblies is formed according to a substantially ci... | 08/08/1978 |
| 4079750 | Vacuum delay valve A delay valve comprising a housing including a side wall and opposed end walls and a plug in the housing cooperating with the side wall to define a first and second chamber. A check valve is provided in the plug permitting flow of air in one direction suc... | 03/21/1978 |
| 4069843 | Clutch cylinder circuit and charging valve therefor Hydraulic mechanism in a transmission for engaging a clutch for forward or reverse before a clutch for first, second, or third speed. Flow of pressure fluid to the latter clutch is by way of a quick fill spool having a large orifice, a rate of rise spool,... | 01/24/1978 |
| 4060099 | Controlled pressure drop valve A valve having stacked disks with alternate circular grooves in the faces thereof to provide a high pressure drop surface in fluid flow transverse to said grooves and ridges. The disks are circular in shape with a circular center opening to provide a cent... | 11/29/1977 |
| 4044992 | High energy loss fluid flow control device A high energy loss fluid flow control device comprising a body defining a chamber in communication with a fluid inlet passage and fluid outlet passage at one end of the chamber; a hollow tubular member mounted in said chamber open at one end adjacent said... | 08/30/1977 |
| 4044991 | High energy loss fluid flow control device A high energy loss fluid flow control device comprises a housing having an annular wall with an inlet adjacent one end and an outlet adjacent the other end. The housing wall includes an inside surface formed with a continuous helical land and groove defin... | 08/30/1977 |
| 4041982 | Double wall plug control valve The control valve is provided with a double walled cage and a valve plug slidably mounted between the perforated walls of the cage. The control valve serves to reduce gas-generated noise when used for gas service and to control both cavitation and noise w... | 08/16/1977 |
| 4024891 | Control valve with noise abating features A noise abating plug for a fluid control valve includes a perforated sleeve that forms one end portion of the plug and a plurality of spaced apart perforated discs that extend between a hub portion of the plug and the inner wall of the sleeve portion. The... | 05/24/1977 |
| 4023594 | Throttle A throttle for use in hydraulic drives requiring low flow rate of liquid includes a stationary housing and a rotor located in said housing. In the housing on the side facing the rotor, provision is made for an insert which is mounted with a clearance with... | 05/17/1977 |
| 4011893 | Flow control valve A flow control valve having a valve chamber which is adapted to receive fluid under pressure and which comprises a valve member having a surface with a groove therein and an outlet passage terminating at one end in a port in the groove. A resilient elemen... | 03/15/1977 |
| 4003405 | Apparatus for regulating the flow rate of a fluid An apparatus for regulating the flow rate of a fluid, comprising a casing having an annular or cone-shaped fluid passage, for radial flow (inwardly or outwardly) between an inlet and outlet which are spaced radially and form unobstructed flow paths to the... | 01/18/1977 |
| 3998244 | Drip irrigation valve with helical flow path A drip irrigation valve comprising an outer member having a passageway and an inner member mounted in the passageway for axial movement. An axially and circumferentially extending rib is provided on a first of the members and cooperates with a confronting... | 12/21/1976 |
| 3995664 | Flow control device A fluid flow control device is disclosed for maintaining a substantially constant volumetric flow rate in either direction independent of the applied pressure above a predetermined pressure level. The device has a generally cylindrical shape, may be symme... | 12/07/1976 |
| 3991743 | Conception-preventing and variable filtering or flow control devices and methods Devices and methods for preventing conception as well as for general use in variable filtering. For preventing conception at least temporarily the devices and methods provide a selective flow for fluid in a vas deferens with sperm being acted upon at the ... | 11/16/1976 |
| 3990548 | Adjustable hydraulic dashpot A hydraulic dashpot having a pressure tube with a port defining a metering orifice through which fluid is metered upon application of impact forces to a piston assembly slidable in the pressure tube, and wherein the pressure tube is rotatable for adjustin... | 11/09/1976 |
| 3977435 | Controlled pressure drop valve A valve having stacked disks with alternate circular grooves in the faces thereof to provide a high pressure drop surface in fluid flow transverse to said grooves and ridges. The disks are circular in shape with a circular center opening to provide a cent... | 08/31/1976 |
| 3971411 | Variable resistance type throttling trim A variable resistance type control valve throttling trim having high resistance, fluid energy absorbing passages formed and controlled between the intersection of a cylindrical valve plug slidable co-operating with a cylindrical valve seatring and wherein... | 07/27/1976 |
| 3964372 | Clutch cylinder circuit and charging valve therefor Hydraulic mechanism in a transmission for engaging a clutch for forward or reverse before a clutch for first, second, or third speed. Flow of pressure fluid to the latter clutch is by way of a quick fill spool having a large orifice, a rate of rise spool,... | 06/22/1976 |
| 3958603 | Insert for movable diaphragm type flow control valve A movable diaphragm liquid flow control valve in which a retaining member is disposed in the housing upstream of the diaphragm so that when a back-flow occurs the diaphragm is prevented from blowing back along the pipework, within which the valve is dispo... | 05/25/1976 |
| 3957083 | Pressure sensitive regulating valve A pressure sensitive regulating valve formed of a spring mounted within a conduit in which fluid flow is to be regulated. The fluid flow is regulated by the pressure responsive expansion and contraction of the axially deformable spring whose successive co... | 05/18/1976 |
| 3954124 | High energy loss nested sleeve fluid control device Nested concentric sleeves or tubes subdivide flow of fluids through a fluid control valve into a myriad of streams between the valve inlet and outlet which flow through passages that create a high energy loss and pressure drop on the fluid to release the ... | 05/04/1976 |
| 3954223 | Trickle irrigator A trickle-flow irrigation valve of the type which is installable through the wall of a garden hose, and having a pressure chamber with an inlet passage from the hose and an outlet passage through a wall of the chamber in which are also formed a shallow ch... | 05/04/1976 |
| 3952776 | Fluid flow device A combustible mixture of air and minute fuel droplets is produced for supply to the cylinders of an internal combustion engine. This mixture is formed by accurately controlling both the atomization of fuel and the mass flow rate of air over substantially ... | 04/27/1976 |
| 3934812 | Valve construction and flow restrictor for use therewith A valve construction for controlling the flow of a fluid therethrough and including a restrictor member that is located in a control chamber and that communicates with the control pilot valve and an interior chamber having access to a pressure responsive ... | 01/27/1976 |
