GB1005014A - Improvements in or relating to piston and cylinder assemblies for use in mine working machines - Google Patents

Improvements in or relating to piston and cylinder assemblies for use in mine working machines

Info

Publication number
GB1005014A
GB1005014A GB1899262A GB1899262A GB1005014A GB 1005014 A GB1005014 A GB 1005014A GB 1899262 A GB1899262 A GB 1899262A GB 1899262 A GB1899262 A GB 1899262A GB 1005014 A GB1005014 A GB 1005014A
Authority
GB
United Kingdom
Prior art keywords
conduit
piston
fluid
ram
area
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
GB1899262A
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.)
HANS BEUKENBERG
HEDWIG BEUKENBERG
KLAUS BEUKENBERG
Original Assignee
HANS BEUKENBERG
HEDWIG BEUKENBERG
KLAUS BEUKENBERG
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 HANS BEUKENBERG, HEDWIG BEUKENBERG, KLAUS BEUKENBERG filed Critical HANS BEUKENBERG
Publication of GB1005014A publication Critical patent/GB1005014A/en
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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/036—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/08—Guiding the machine
    • E21C35/12—Guiding the machine along a conveyor for the cut material
    • E21C35/14—Equipment for pressing the conveyor towards the working face
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7055—Linear output members having more than two chambers

Abstract

1,005,014. Rams for advancing mine face conveyers. H. BEUKENBERG, H. BEUKENBERG and K. BEUKENBERG, [trading as MASCHINENFABRIK GLUCK AUF GUNTHER KLERNER]. May 17, 1962 [Jan. 26, 1962], No. 18992/62. Heading B8J. [Also in Division F1] A double-acting hydraulic ram for advancing a conveyer or other machine towards a mine face is provided with alternative fluid conduits whereby at least two alternative effective piston pressure surfaces for extending the ram are provided. In the embodiment shown in Fig. 1, the cylinder 1 is provided with detachable end covers 2, 3 and contains a piston 4 having a tubular piston rod 5. The piston 4 has a central axial bore 6 lined with a guide sleeve in which a fluid pressure conduit 7, detachably screwed into a bore 8 in the end cover 3, is guided. The cover 3 accommodates control means for manually controlling the flow of fluid to the cylinder chambers through conduits 10, 12. To extend the ram, fluid under pressure is fed through the conduit 10 and the chamber 15 communicates through a bore 9 in the piston rod 5 and the conduit 7 to the return conduit 12 so that the effective pressure surface area is x<SP>1</SP>. If the available fluid pressure is increased, the fluid may be fed to both chambers 11, 15 so that the effective pressure area for extending the ram is x<SP>1</SP>-V. If the ram is to be used with considerably higher fluid pressure, a second fluid conduit 16, Fig. 3, is connected between a supply conduit 18 and a conduit 17, conduit 7 is connected to a return conduit and the bore 9 is plugged. To extend the ram pressure fluid is fed through conduit 10 to the chamber 11 and the effective piston area is x<SP>3</SP>. The effective piston area may be further reduced to the cross-sectional area of the conduit 7 by feeding fluid pressure to the chambers 11, 15 and the interior of the piston rod 5, Fig. 4 (not shown). In a further modification, Fig. 5 (not shown), the conduit 7 is removed, the bore 6 in the piston and the bore 9 in the piston rod are plugged so that the effective piston area for extending the ram is the total piston area. This area may be reduced by V by applying fluid pressure to the chamber 15. The conduits 7 may be changed for conduits of different cross-sectional areas.
GB1899262A 1962-01-26 1962-05-17 Improvements in or relating to piston and cylinder assemblies for use in mine working machines Expired GB1005014A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0051581 1962-01-26

Publications (1)

Publication Number Publication Date
GB1005014A true GB1005014A (en) 1965-09-22

Family

ID=7307171

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1899262A Expired GB1005014A (en) 1962-01-26 1962-05-17 Improvements in or relating to piston and cylinder assemblies for use in mine working machines

Country Status (1)

Country Link
GB (1) GB1005014A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199618A (en) * 1987-01-08 1988-07-13 Gen Motors Corp Hydraulic actuator
FR2753751A1 (en) * 1996-09-23 1998-03-27 Chabas & Besson Hydraulique Ma Single acting hydraulic lifting jack
GB2325455A (en) * 1998-01-10 1998-11-25 Anthony Robson Commercial Sale Lifting device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199618A (en) * 1987-01-08 1988-07-13 Gen Motors Corp Hydraulic actuator
GB2199618B (en) * 1987-01-08 1991-01-02 Gen Motors Corp Hydraulic actuator system
FR2753751A1 (en) * 1996-09-23 1998-03-27 Chabas & Besson Hydraulique Ma Single acting hydraulic lifting jack
GB2325455A (en) * 1998-01-10 1998-11-25 Anthony Robson Commercial Sale Lifting device
GB2325455B (en) * 1998-01-10 1999-05-19 Anthony Robson Commercial Sale Lifting device

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