GB715018A - Improvements in or relating to hydraulically operated pit props and like supports - Google Patents

Improvements in or relating to hydraulically operated pit props and like supports

Info

Publication number
GB715018A
GB715018A GB2866650A GB2866650A GB715018A GB 715018 A GB715018 A GB 715018A GB 2866650 A GB2866650 A GB 2866650A GB 2866650 A GB2866650 A GB 2866650A GB 715018 A GB715018 A GB 715018A
Authority
GB
United Kingdom
Prior art keywords
pit prop
plungers
hose
valves
nose
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
GB2866650A
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.)
Lake and Elliot Ltd
Original Assignee
Lake and Elliot 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 Lake and Elliot Ltd filed Critical Lake and Elliot Ltd
Priority to GB2866650A priority Critical patent/GB715018A/en
Publication of GB715018A publication Critical patent/GB715018A/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
    • E21D15/50—Component parts or details of props
    • E21D15/52—Extensible units located above or below standard props
    • E21D15/523—Extensible units located above or below standard props with hydraulic or pneumatic control
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Reciprocating Pumps (AREA)

Abstract

715,018. Reciprocating pumps; pipe joints; pipe supports. LAKE & ELLIOTT, Ltd., GILBERT, G., and NEWMAN, J. Nov. 23, 1951 [Nov. 23, 1950], No. 28666/50. Classes 99 (1), 99 (2) and 102 (1). [Also in Groups X and XXX] A hydraulic unit for actuating a pit prop (see Group.X) comprises a pump A bolted by a flange 11 in a reservoir B and connected by a flexible hose 3 to the pit prop D. The pump comprises a manually operable rocker arm 15 adapted to operate two plungers 21 to which it is connected by links 20, or slots in the plungers or by springs pressing the plungers against the rocker arms. Inlet valves 26 communicate with the reservoir and a delivery valve 31 with the hose 3. The hose 3 is connected to the pit prop by a coupling comprising a grip 42 having a nose 44, Fig. 12, adapted to seat on a rubber seat 54 in an extension 47 of the pit prop. The nose 44 and extension, when separate are closed by valves 43, 46 respectively. These valves engage and open one another when connection is made. A cam 60 on the grip 42 engages a cam 56 on the pit prop and assists the making of the connection which is finally locked by a pin passing through holes 67, 61.
GB2866650A 1950-11-23 1950-11-23 Improvements in or relating to hydraulically operated pit props and like supports Expired GB715018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2866650A GB715018A (en) 1950-11-23 1950-11-23 Improvements in or relating to hydraulically operated pit props and like supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2866650A GB715018A (en) 1950-11-23 1950-11-23 Improvements in or relating to hydraulically operated pit props and like supports

Publications (1)

Publication Number Publication Date
GB715018A true GB715018A (en) 1954-09-08

Family

ID=10279210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2866650A Expired GB715018A (en) 1950-11-23 1950-11-23 Improvements in or relating to hydraulically operated pit props and like supports

Country Status (1)

Country Link
GB (1) GB715018A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075074B (en) *
DE1074532B (en) * 1956-05-30 1960-02-04 BWG Bergwerk- und Walzwerk Maschinenbau GmbH Duisburg Hydraulic pit ram
DE1082211B (en) * 1958-08-14 1960-05-25 Bwg Bergwerk Walzwerk System for operating hydraulic equipment of different types for mining operations
DE1103270B (en) * 1957-04-09 1961-03-30 Kloeckner Werke Ag Pressure gauge for hydraulic pit rams

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075074B (en) *
DE1074532B (en) * 1956-05-30 1960-02-04 BWG Bergwerk- und Walzwerk Maschinenbau GmbH Duisburg Hydraulic pit ram
DE1103270B (en) * 1957-04-09 1961-03-30 Kloeckner Werke Ag Pressure gauge for hydraulic pit rams
DE1082211B (en) * 1958-08-14 1960-05-25 Bwg Bergwerk Walzwerk System for operating hydraulic equipment of different types for mining operations

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