FR875837A - Advanced hydraulic jack - Google Patents

Advanced hydraulic jack

Info

Publication number
FR875837A
FR875837A FR875837DA FR875837A FR 875837 A FR875837 A FR 875837A FR 875837D A FR875837D A FR 875837DA FR 875837 A FR875837 A FR 875837A
Authority
FR
France
Prior art keywords
hydraulic jack
advanced hydraulic
advanced
jack
hydraulic
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)
Inventor
Gustave Dumont
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 filed Critical
Application granted granted Critical
Publication of FR875837A publication Critical patent/FR875837A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
    • E21D15/587—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded by means of power accumulators to be pre-charged by rock pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
FR875837D 1941-05-29 1941-05-29 Advanced hydraulic jack Expired FR875837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR875837T 1941-05-29

Publications (1)

Publication Number Publication Date
FR875837A true FR875837A (en) 1942-10-06

Family

ID=9360334

Family Applications (1)

Application Number Title Priority Date Filing Date
FR875837D Expired FR875837A (en) 1941-05-29 1941-05-29 Advanced hydraulic jack

Country Status (1)

Country Link
FR (1) FR875837A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072288A (en) * 1975-06-10 1978-02-07 Stabilus Gmbh Chair with pneumatically adjustable seat height and back support inclination

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072288A (en) * 1975-06-10 1978-02-07 Stabilus Gmbh Chair with pneumatically adjustable seat height and back support inclination

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