US3613707A - Fluidic switching circuits - Google Patents

Fluidic switching circuits Download PDF

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Publication number
US3613707A
US3613707A US3613707DA US3613707A US 3613707 A US3613707 A US 3613707A US 3613707D A US3613707D A US 3613707DA US 3613707 A US3613707 A US 3613707A
Authority
US
United States
Prior art keywords
pressure
control
ports
port
bistable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
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English (en)
Inventor
Ronald Alfred Heath
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of US3613707A publication Critical patent/US3613707A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C1/00—Circuit elements having no moving parts
    • F15C1/08—Boundary-layer devices, e.g. wall-attachment amplifiers coanda effect
    • F15C1/10—Boundary-layer devices, e.g. wall-attachment amplifiers coanda effect for digital operation, e.g. to form a logical flip-flop, OR-gate, NOR-gate, AND-gate; Comparators; Pulse generators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/212—System comprising plural fluidic devices or stages
    • Y10T137/2125—Plural power inputs [e.g., parallel inputs]
    • Y10T137/2142—With variable or selectable source of control-input signal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/212—System comprising plural fluidic devices or stages
    • Y10T137/2125—Plural power inputs [e.g., parallel inputs]
    • Y10T137/2147—To cascaded plural devices

Definitions

  • the invention relates to a fluidic pressure-ratio switching system, which gives an output pressure signal when one control pressure is higher than another in which the output pressure is a high of an input pressure which is used to drive the system.
  • a fluidic bistable device performs the switching function and a fluidic proportional amplifier provides the pressure recovery, the outputs of the bistable device being used to provide control pressures for the proportional amplifier.
  • a flow restrictor is connected in one output of the bistable device and a further flow restrictor is connected between the proportional amplifier control connections. A predetermined pressure ratio therefore exists between these control connections.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Pressure (AREA)
US3613707D 1968-09-30 1969-09-17 Fluidic switching circuits Expired - Lifetime US3613707A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4626468A GB1273745A (en) 1968-09-30 1968-09-30 Fluidic switching circuits

Publications (1)

Publication Number Publication Date
US3613707A true US3613707A (en) 1971-10-19

Family

ID=10440518

Family Applications (1)

Application Number Title Priority Date Filing Date
US3613707D Expired - Lifetime US3613707A (en) 1968-09-30 1969-09-17 Fluidic switching circuits

Country Status (4)

Country Link
US (1) US3613707A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2022209B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1273745A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE348802B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727624A (en) * 1971-05-19 1973-04-17 Mess & Regelungst Veb K Fluidic circuit coupling arrangement
US20130284294A1 (en) * 2010-10-11 2013-10-31 Airbus Operations Gmbh Fluid actuator for influencing the flow along a flow surface, as well as blow-out device and flow body comprising a like fluid actuator

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338515A (en) * 1964-04-29 1967-08-29 Gen Electric Fluid control device
US3399829A (en) * 1965-05-04 1968-09-03 Martin Marietta Corp Fluid operated binary counter
US3409032A (en) * 1965-05-19 1968-11-05 Gen Electric Fluid-operated frequency sensing converter circuit
US3420255A (en) * 1965-09-01 1969-01-07 Gen Electric Fluid control devices
US3442279A (en) * 1966-10-19 1969-05-06 Us Army Self-biased pure fluid amplifier
US3443574A (en) * 1966-04-04 1969-05-13 Honeywell Inc Fluid apparatus
US3458129A (en) * 1967-11-29 1969-07-29 Gen Electric Fluidic frequency-to-analog circuit
US3457937A (en) * 1967-08-15 1969-07-29 Honeywell Inc Fluid circuit
US3457847A (en) * 1966-08-30 1969-07-29 Westland Aircraft Ltd Rate of change of pressure control

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1412048A (fr) * 1963-10-04 1965-09-24 Sperry Rand Corp Dispositif de triage et d'identification à fluide
US3248053A (en) * 1964-06-18 1966-04-26 Sperry Rand Corp Monostable fluid amplifier and shift register employing same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338515A (en) * 1964-04-29 1967-08-29 Gen Electric Fluid control device
US3399829A (en) * 1965-05-04 1968-09-03 Martin Marietta Corp Fluid operated binary counter
US3409032A (en) * 1965-05-19 1968-11-05 Gen Electric Fluid-operated frequency sensing converter circuit
US3420255A (en) * 1965-09-01 1969-01-07 Gen Electric Fluid control devices
US3443574A (en) * 1966-04-04 1969-05-13 Honeywell Inc Fluid apparatus
US3457847A (en) * 1966-08-30 1969-07-29 Westland Aircraft Ltd Rate of change of pressure control
US3442279A (en) * 1966-10-19 1969-05-06 Us Army Self-biased pure fluid amplifier
US3457937A (en) * 1967-08-15 1969-07-29 Honeywell Inc Fluid circuit
US3458129A (en) * 1967-11-29 1969-07-29 Gen Electric Fluidic frequency-to-analog circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727624A (en) * 1971-05-19 1973-04-17 Mess & Regelungst Veb K Fluidic circuit coupling arrangement
US20130284294A1 (en) * 2010-10-11 2013-10-31 Airbus Operations Gmbh Fluid actuator for influencing the flow along a flow surface, as well as blow-out device and flow body comprising a like fluid actuator
US9573679B2 (en) * 2010-10-11 2017-02-21 Airbus Operations Gmbh Fluid actuator for influencing the flow along a flow surface, as well as blow-out device and flow body comprising a like fluid actuator

Also Published As

Publication number Publication date
SE348802B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-09-11
GB1273745A (en) 1972-05-10
FR2022209B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-03-16
DE1949008A1 (de) 1970-04-09
DE1949008B2 (de) 1975-09-04
FR2022209A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-07-31

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