GB1078834A - Improvements in ram cylinders - Google Patents

Improvements in ram cylinders

Info

Publication number
GB1078834A
GB1078834A GB3195365A GB3195365A GB1078834A GB 1078834 A GB1078834 A GB 1078834A GB 3195365 A GB3195365 A GB 3195365A GB 3195365 A GB3195365 A GB 3195365A GB 1078834 A GB1078834 A GB 1078834A
Authority
GB
United Kingdom
Prior art keywords
seal
pressure
chamber
piston
face
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
GB3195365A
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.)
Kloeckner Werke AG
Original Assignee
Kloeckner Werke 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 Kloeckner Werke AG filed Critical Kloeckner Werke AG
Publication of GB1078834A publication Critical patent/GB1078834A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00—Transport specially adapted to underground conditions
    • E21F13/08—Shifting conveyors or other transport devices from one location at the working face to another
    • E21F13/086—Armoured conveyors shifting devices
    • 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
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/17—Characterised by the construction of the motor unit of the straight-cylinder type of differential-piston type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)
  • Sealing Devices (AREA)

Abstract

1,078,834. Fluid pressure jacks. KLOCKNER-WERKE A.G. July 27, 1965 [July 28, 1964], No. 31953/65. Heading B8J. [Also in Division F1] A double acting ram unit comprises a pressurizable expanding seal 8 mounted in the body of a piston with an annular face 2a and a full face 2b. A piston rod 3 includes a pressure supply duct 1 communicating with the interior of the seal 8 and a by-pass duct 9 with a non- return valve 10 communicating with the interior of the seal 8 and with the chamber on the side of the annular face 2a. When pressure is applied to the annular face 2a through a pipe (not shown) the valve 10 is closed and isolates the interior of the seal 8 so that pressure can be transmitted through the clearance between the seal 8 and the inside of the cylinder, the pressures in the chambers on both sides of the piston becoming the same with consequent extension of the ram. Admission of pressure through the duct 1 seals the seal 8 against the inside of the cylinder insolating the chamber of the full face 2b from the chamber of the annular face 2a so that the ram is retracted, pressure medium trapped in the full face piston chamber escaping through an exhaust (not shown).
GB3195365A 1964-07-28 1965-07-27 Improvements in ram cylinders Expired GB1078834A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK53583A DE1288545B (en) 1964-07-28 1964-07-28 Back cylinder with a piston that can be acted upon by a working medium on both sides

Publications (1)

Publication Number Publication Date
GB1078834A true GB1078834A (en) 1967-08-09

Family

ID=7226775

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3195365A Expired GB1078834A (en) 1964-07-28 1965-07-27 Improvements in ram cylinders

Country Status (4)

Country Link
BE (1) BE667424A (en)
DE (1) DE1288545B (en)
GB (1) GB1078834A (en)
NL (1) NL6509389A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113217502A (en) * 2021-06-01 2021-08-06 中国矿业大学(北京) Piston rod pressure maintaining pushing device of pseudo-triaxial pressure maintaining loading device
CN113680425A (en) * 2021-09-14 2021-11-23 洛阳大华智能科技有限公司 Hydraulic locking type cone crusher and locking method
CN114215821A (en) * 2021-12-30 2022-03-22 徐州徐工液压件有限公司 Hydraulic cylinder with built-in oil circuit supporting legs

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE918204C (en) * 1952-04-30 1954-09-20 Fritz Bothe Back device, especially for laying face conveyors
DE1864707U (en) * 1962-01-26 1963-01-03 Glueck Auf Guenther Klerner Ma CHANGEABLE, DOUBLE-ACTING, HYDRAULIC ADVANCING CYLINDER UNIT, IN PARTICULAR FOR EQUIPMENT CONVEYORS IN MINING.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113217502A (en) * 2021-06-01 2021-08-06 中国矿业大学(北京) Piston rod pressure maintaining pushing device of pseudo-triaxial pressure maintaining loading device
CN113217502B (en) * 2021-06-01 2022-03-22 中国矿业大学(北京) Piston rod pressure maintaining pushing device of pseudo-triaxial pressure maintaining loading device
CN113680425A (en) * 2021-09-14 2021-11-23 洛阳大华智能科技有限公司 Hydraulic locking type cone crusher and locking method
CN113680425B (en) * 2021-09-14 2023-01-20 洛阳大华智能科技有限公司 Hydraulic locking type cone crusher and locking method
CN114215821A (en) * 2021-12-30 2022-03-22 徐州徐工液压件有限公司 Hydraulic cylinder with built-in oil circuit supporting legs

Also Published As

Publication number Publication date
NL6509389A (en) 1966-01-31
DE1288545B (en) 1969-02-06
BE667424A (en) 1965-11-16

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