FR2225640B1 - - Google Patents

Info

Publication number
FR2225640B1
FR2225640B1 FR7412858A FR7412858A FR2225640B1 FR 2225640 B1 FR2225640 B1 FR 2225640B1 FR 7412858 A FR7412858 A FR 7412858A FR 7412858 A FR7412858 A FR 7412858A FR 2225640 B1 FR2225640 B1 FR 2225640B1
Authority
FR
France
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
FR7412858A
Other versions
FR2225640A1 (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.)
Australian Iron and Steel Pty Ltd
Original Assignee
Australian Iron and Steel Pty 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 Australian Iron and Steel Pty Ltd filed Critical Australian Iron and Steel Pty Ltd
Publication of FR2225640A1 publication Critical patent/FR2225640A1/fr
Application granted granted Critical
Publication of FR2225640B1 publication Critical patent/FR2225640B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/15—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor with special provision for automatic return
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
    • B25D9/265—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof with arrangements for automatic stopping when the tool is lifted from the working face or suffers excessive bore resistance
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
FR7412858A 1973-04-12 1974-04-11 Expired FR2225640B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPB297673 1973-04-12

Publications (2)

Publication Number Publication Date
FR2225640A1 FR2225640A1 (fr) 1974-11-08
FR2225640B1 true FR2225640B1 (fr) 1977-10-14

Family

ID=3765670

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7412858A Expired FR2225640B1 (fr) 1973-04-12 1974-04-11

Country Status (4)

Country Link
DE (1) DE2417161A1 (fr)
FR (1) FR2225640B1 (fr)
GB (3) GB1468186A (fr)
ZA (1) ZA742081B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2425293A1 (fr) * 1978-05-10 1979-12-07 Hydraulique B G Dispositif hydraulique pour commander un verin de poussee
WO1983002483A1 (fr) * 1982-01-13 1983-07-21 Reeves, Jerry, L. Dispositif de manipulation de conteneur avec circuit de commande electrohydraulique programme
DE3203465A1 (de) * 1982-02-03 1983-08-11 Klöckner-Humboldt-Deutz AG, 5000 Köln Druckmittelkreislauf, insbesondere fuer ein maehwerk
FR2522626A1 (fr) * 1982-03-02 1983-09-09 Morillon Ets Dispositif d'assistance au demarrage d'extracteur a vis equipant des cellules de stockage de produits pulverulents ou granuleux
US4664017A (en) * 1984-03-19 1987-05-12 General Signal Corporation Hydraulic control system and valve
EP0221852A3 (fr) * 1985-11-07 1988-11-23 Fritz Haug AG Dispositif pour travailler des matériaux relativement durs
FR2714743B1 (fr) * 1993-12-31 1996-02-23 Jeantil Sa Dispositif de régulation hydraulique de la rotation de deux arbres d'entraînement, notamment d'un fond mobile et d'un dispositif démêleur d'une désileuse ou analogue.
CN102022394B (zh) * 2010-12-31 2013-04-17 济南液压泵有限责任公司 一种整体式手动多路换向阀
CN108086906B (zh) * 2018-01-29 2023-06-16 秦皇岛迪峰凿岩设备有限公司 一种全液压凿岩台车逐步加压装置及方法
CN110259747B (zh) * 2019-06-20 2024-02-13 苏州跃翔智能科技有限公司 一种多级控制阀
CN116624459B (zh) * 2023-07-19 2023-10-20 山河智能装备股份有限公司 一种自适应加压液压系统及施工设备

Also Published As

Publication number Publication date
GB1468185A (en) 1977-03-23
GB1468184A (en) 1977-03-23
GB1468186A (en) 1977-03-23
DE2417161A1 (de) 1974-10-31
FR2225640A1 (fr) 1974-11-08
ZA742081B (en) 1975-03-26

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Legal Events

Date Code Title Description
ST Notification of lapse