With Feedback Passage(s) Between Devices Of Cascade Patents (Class 137/820)
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Patent number: 8418725Abstract: A well tool can comprise a fluid input, a fluid output and a fluidic oscillator which produces oscillations in a fluid which flows from the input to the output. The fluidic oscillator can include a vortex chamber with inlets, whereby fluid enters the vortex chamber alternately via the inlets, the inlets being configured so that the fluid enters the vortex chamber in different directions via the respective inlets, and a fluid switch which directs the fluid alternately toward different flow paths in response to pressure differentials between feedback fluid paths. The feedback fluid paths may be connected to the vortex chamber. The flow paths may cross each other between the fluid switch and the outlet.Type: GrantFiled: December 31, 2010Date of Patent: April 16, 2013Assignee: Halliburton Energy Services, Inc.Inventors: Roger L. Schultz, Robert Pipkin, Travis Cavender
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Patent number: 6053207Abstract: The invention relates to a valve cover system in which the valve cover has a distinctive shape of a regular octagon and indicia identifying its function and relationship to the system it controls. In addition, the invention relates to a valve cover system which has a set of extensions on a valve cover socket so that the valve cover can follow ground movement and remain relatively level with the ground. Other improvements include a locking mechanism that inhibits removal of the valve cover thereby discouraging vandalism and a low friction telescopic extension to allow movement of the valve cover without damaging the conduit between the valve and the valve cover.Type: GrantFiled: November 2, 1998Date of Patent: April 25, 2000Inventor: George W. Benedetti
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Patent number: 5861685Abstract: A circuit isolator apparatus for use with pump or master valve circuits having a plurality of controllers connected thereto. One isolator apparatus is used in association with each controller. The isolator apparatus includes a pair of relays which allow only one controller to access the pump or valve circuit at a time to prevent feedback between controllers and damage to controllers due to incorrect phasing.Type: GrantFiled: July 24, 1997Date of Patent: January 19, 1999Inventor: James E. Geiger
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Patent number: 4955547Abstract: A fluidic oscillating nozzle that oscillates a fluid jet at high frequency by the use of fluidic amplification technology with no moving parts. The jet that issues from the nozzle is a zero-degree jet of fluid that maintains a very high energy density; however, due to its oscillation, its appearance is that of a fan-type jet that disperses at a fan angle from the nozzle. At a nominal distance from the nozzle, the jet covers the surface with a relatively broad area of flow while maintaining high energy impact density due to the impact effects of the non-expanding zero-degree jet.Type: GrantFiled: August 24, 1989Date of Patent: September 11, 1990Assignee: Spectra Technologies, Inc.Inventor: Robert L. Woods
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Patent number: 4905909Abstract: A fluidic oscillating nozzle that oscillates a fluid jet at high frequency by the use of fluidic amplification technology with no moving parts. The jet that issues from the nozzle is a zero-degree jet of fluid that maintains a very high energy density; however, due to its oscillation, its appearance is that of a fan-type jet that disperses at a fan angle from the nozzle. At a nominal distance from the nozzle, the jet covers the surface with a relatively broad area of flow while maintaining high energy impact density due to the impact effects of the non-expanding zero-degree jet.Type: GrantFiled: September 2, 1987Date of Patent: March 6, 1990Assignee: Spectra Technologies, Inc.Inventor: Robert L. Woods
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Patent number: 4874016Abstract: A fluidic circuit (10) having two oscillators (22,24) which separately vent to a common volume (78) and receive pressurized fluid inputs along separate flow paths (54,56) is provided with filters (80) positioned both upstream and downstream from each oscillator. Each of the filters (80) is adapted to attenuate oscillator-induced noise and comprises a series combination of an inductive element (82), a capacitive element (84), and an inductive element (86).Type: GrantFiled: February 28, 1989Date of Patent: October 17, 1989Assignee: Allied-Signal Inc.Inventor: Raymond R. Tseng
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Patent number: 4852613Abstract: A control system for a single acting or double acting fluidic pump comprising a detector stage (1), a power amplifiction stage (2) and a primary element stage (3). The detector stage comprises bistable fluidic amplifiers for detecting pressure changes in a gas pressure line (10) to a displacement vessel of the pump. The power amplification stage comprises at least one unvented bistable fluidic amplifier to amplify and direct signals from the detector stage to the primary element. The primary element can be a jet pump (12) and vortex amplifier (13) to provide high pressures in the gas pressure line (10).Type: GrantFiled: July 11, 1988Date of Patent: August 1, 1989Assignee: United Kingdon Atomic Energy AuthorityInventors: John R. Tippetts, Geoffrey H. Priestman
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Patent number: 4833880Abstract: A fluidic set point amplifier provides an output signal which is strongly linear with respect to pressure of fluid supply, free of hysteresis, and has a zero crossing (set point) at a determined value of supply pressure. Uses of the set point amplifier include an all-fluidic pressure regulator, and a turbine engine fuel control having only a single moving part.Type: GrantFiled: October 26, 1988Date of Patent: May 30, 1989Assignee: Allied-Signal Inc.Inventor: Donald W. Chapin
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Patent number: 4644781Abstract: Presented is a fluid property measuring device which can be used to measure he viscosity, the density, the volumetric flow rate, and the mass flow rate, of a fluid without using moving parts. The fluid property measuring device comprises a linear fluid resistor, a nonlinear resistor, and a linear, fluid property independent, volumetric flowmeter, Two nonlinear resistors, or two linear resistors, may be used instead of a linear and nonlinear resistor. The linear, fluid property independent, volumetric flowmeter comprises a fluidic negative feedback oscillator in fluid connection with a fluidic buffer laminar proportional amplifier.Type: GrantFiled: December 7, 1984Date of Patent: February 24, 1987Assignee: The United States of America as represented by the Secretary of the ArmyInventor: George Mon
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Patent number: 4276895Abstract: A temperature compensation device for a fluidic circuit is disclosed. The vice comprises a high gain fluid amplifier having input and feedback resistors. The resistance to fluid flow through the input resistor is dependent upon fluid density, while the resistance to flow through the feedback resistor is dependent upon fluid viscosity.Type: GrantFiled: September 20, 1979Date of Patent: July 7, 1981Assignee: The United States of America as represented by the Secretary of the ArmyInventor: Tadeusz M. Drzewiecki
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Patent number: 4265116Abstract: A fluidic analog temperature sensor which compensates for variations in the supply pressure to the temperature sensor.Type: GrantFiled: October 1, 1979Date of Patent: May 5, 1981Assignee: The Garrett CorporationInventor: Paul S. Evans