GB1189382A - A Reversible Double Acting Fluid Pressure Ram Apparatus - Google Patents

A Reversible Double Acting Fluid Pressure Ram Apparatus

Info

Publication number
GB1189382A
GB1189382A GB1303768A GB1303768A GB1189382A GB 1189382 A GB1189382 A GB 1189382A GB 1303768 A GB1303768 A GB 1303768A GB 1303768 A GB1303768 A GB 1303768A GB 1189382 A GB1189382 A GB 1189382A
Authority
GB
United Kingdom
Prior art keywords
fluid pressure
double acting
pressure ram
acting fluid
ram apparatus
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
GB1303768A
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.)
Salzgitter Maschinen AG
Original Assignee
Salzgitter Maschinen AG
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 Salzgitter Maschinen AG filed Critical Salzgitter Maschinen AG
Publication of GB1189382A publication Critical patent/GB1189382A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0073—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices with advancing shifting devices connected therewith
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Pens And Brushes (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

1,189,382. Valves. SALZGITTER MASCHINEN A.G. 18 March, 1968 [3 May, 1967], No. 13037/68. Heading F2V. A double-acting ram 1 of the kind used for shifting mining machinery is operated by applying a setting gun selectively to one of a pair of inlets 7, 9 which are connected via shuttle valve 16 to pairs of ducts 6, 12 and 5, 13 which communicate respectively with opposite ends of the ram cylinder. An exhaust duct 20 communicates via the reduced central portion of the valve shuttle with the duct 5 or 6 not being fed by the gun.
GB1303768A 1967-05-03 1968-03-18 A Reversible Double Acting Fluid Pressure Ram Apparatus Expired GB1189382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0109701 1967-05-03

Publications (1)

Publication Number Publication Date
GB1189382A true GB1189382A (en) 1970-04-22

Family

ID=7529727

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1303768A Expired GB1189382A (en) 1967-05-03 1968-03-18 A Reversible Double Acting Fluid Pressure Ram Apparatus

Country Status (2)

Country Link
FR (1) FR1564233A (en)
GB (1) GB1189382A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014008715A1 (en) * 2012-07-09 2014-01-16 中国矿业大学 Hinged-connection type suspended hydraulic stand column

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014008715A1 (en) * 2012-07-09 2014-01-16 中国矿业大学 Hinged-connection type suspended hydraulic stand column

Also Published As

Publication number Publication date
DE1533764B2 (en) 1973-01-04
FR1564233A (en) 1969-04-18
DE1533764A1 (en) 1970-03-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee