FR1424312A - Support kit intended for use in mines - Google Patents

Support kit intended for use in mines

Info

Publication number
FR1424312A
FR1424312A FR5123A FR5123A FR1424312A FR 1424312 A FR1424312 A FR 1424312A FR 5123 A FR5123 A FR 5123A FR 5123 A FR5123 A FR 5123A FR 1424312 A FR1424312 A FR 1424312A
Authority
FR
France
Prior art keywords
valve
line
roof
prop
lever
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
FR5123A
Other languages
French (fr)
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment 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 Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Application granted granted Critical
Publication of FR1424312A publication Critical patent/FR1424312A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/0065—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 driven, or automatically, e.g. electrically-hydraulically controlled

Abstract

1,022,469. Advancing mine roof supports. DOWTY MINING EQUIPMENT Ltd. Feb. 2, 1965 [Feb. 11, 1964], No. 5687/64. Heading F1P. An advanceable mine roof support 3, Fig. 2 (not shown) is released slowly by draining fluid through a line 19, an aperture 34 in a piston valve 26, a lever-actuated pilot valve 36 in parallel with valve 26 and through a line 22 leading to a main return line 23 and the prop is then released more quickly by the valve 26 being lifted from its seat 27 following the pressure drop across orifice 34 when the roof bar is clear of the mine roof the pressure drop across aperture 34 decreases which results in valve 26 closing and rate of release being slowed. If during advancement the roof bar re-engages the roof the resulting pressure build-up in valve chamber 29 lifts valve 26 to re-establish quick release of the prop. The pilot valve 36 is held open by a rod 39 when lifted by a lever 42 pivoted about its fulcrum by the rod 49 of a piston 47 subjected to main pressure supply from a line 12. The valve 36 is closed prior to resetting the prop by the lever being displaced by a record piston 52 when a valve 14 in a branch 13 of line 12 is opened by the conveyer advancing jack 5 at the end of its stroke.
FR5123A 1964-02-11 1965-02-11 Support kit intended for use in mines Expired FR1424312A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5687/64A GB1022469A (en) 1964-02-11 1964-02-11 Roof support assembly suitable for use in mines

Publications (1)

Publication Number Publication Date
FR1424312A true FR1424312A (en) 1966-01-07

Family

ID=9800755

Family Applications (1)

Application Number Title Priority Date Filing Date
FR5123A Expired FR1424312A (en) 1964-02-11 1965-02-11 Support kit intended for use in mines

Country Status (3)

Country Link
US (1) US3357313A (en)
FR (1) FR1424312A (en)
GB (1) GB1022469A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6600072A (en) * 1966-01-04 1967-07-05
GB1228381A (en) * 1967-11-08 1971-04-15

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267284A (en) * 1941-03-10 1941-12-23 Livers Carlos Benjamin By-pass valve
NL248713A (en) * 1959-02-23
GB962543A (en) * 1959-08-21 1964-07-01 Acrow Eng Ltd Improvements in and relating to hydraulic props
US3145734A (en) * 1961-10-06 1964-08-25 Borg Warner Pressure compensated flow control valve
GB991012A (en) * 1962-05-25 1965-05-05 Dowty Mining Equipment Ltd Roof support assembly

Also Published As

Publication number Publication date
US3357313A (en) 1967-12-12
GB1022469A (en) 1966-03-16

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