FR1183778A - Piezoelectric crystal transducer for controlling hydraulic valves - Google Patents

Piezoelectric crystal transducer for controlling hydraulic valves

Info

Publication number
FR1183778A
FR1183778A FR1183778DA FR1183778A FR 1183778 A FR1183778 A FR 1183778A FR 1183778D A FR1183778D A FR 1183778DA FR 1183778 A FR1183778 A FR 1183778A
Authority
FR
France
Prior art keywords
piezoelectric crystal
hydraulic valves
controlling hydraulic
crystal transducer
transducer
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
Application number
Other languages
French (fr)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR1183778A publication Critical patent/FR1183778A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/60—Automatic controllers hydraulic only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
    • F15B13/0438—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the pilot valves being of the nozzle-flapper type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/16—Systems essentially having two or more interacting servomotors, e.g. multi-stage
    • F15B9/17—Systems essentially having two or more interacting servomotors, e.g. multi-stage with electrical control means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
FR1183778D 1956-09-28 1957-09-27 Piezoelectric crystal transducer for controlling hydraulic valves Expired FR1183778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1183778XA 1956-09-28 1956-09-28

Publications (1)

Publication Number Publication Date
FR1183778A true FR1183778A (en) 1959-07-13

Family

ID=22378197

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1183778D Expired FR1183778A (en) 1956-09-28 1957-09-27 Piezoelectric crystal transducer for controlling hydraulic valves

Country Status (1)

Country Link
FR (1) FR1183778A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001826A1 (en) * 1979-03-01 1980-09-04 Saab Scania Ab A signal converting unit intended to be incorporated in a pneumatic control system
EP0405854A2 (en) * 1989-06-26 1991-01-02 Seiko Instruments Inc. Ultrasonic motor
EP3418586A1 (en) * 2017-06-24 2018-12-26 Hamilton Sundstrand Corporation Servovalve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001826A1 (en) * 1979-03-01 1980-09-04 Saab Scania Ab A signal converting unit intended to be incorporated in a pneumatic control system
EP0405854A2 (en) * 1989-06-26 1991-01-02 Seiko Instruments Inc. Ultrasonic motor
EP0405854A3 (en) * 1989-06-26 1991-02-27 Seiko Instruments Inc. Ultrasonic motor
EP3418586A1 (en) * 2017-06-24 2018-12-26 Hamilton Sundstrand Corporation Servovalve
US10954971B2 (en) 2017-06-24 2021-03-23 Hamilton Sunstrand Corporation Servovalve

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