GB2243394B - Mine roof supports - Google Patents

Mine roof supports

Info

Publication number: GB2243394B
Authority: GB; United Kingdom
Prior art keywords: mine roof; roof supports; supports; mine; roof
Prior art date: 1990-04-28
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 - Fee Related

Application number

GB9108582A

Other versions

GB9108582D0 (en

GB2243394A (en

Inventor

Peter Elliott-Moore

Valence Cedric Lloyd Freeman

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.)

Meco Mining Equipment Ltd

Original Assignee

Meco 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.)

1990-04-28

Filing date

1991-04-22

Publication date

1993-11-10

1991-04-22 Application filed by Meco Mining Equipment Ltd filed Critical Meco Mining Equipment Ltd

1991-06-05 Publication of GB9108582D0 publication Critical patent/GB9108582D0/en

1991-10-30 Publication of GB2243394A publication Critical patent/GB2243394A/en

1993-11-10 Application granted granted Critical

1993-11-10 Publication of GB2243394B publication Critical patent/GB2243394B/en

2011-04-22 Anticipated expiration legal-status Critical

Status Expired - Fee Related 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control

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)
Safety Valves (AREA)

GB9108582A 1990-04-28 1991-04-22 Mine roof supports Expired - Fee Related GB2243394B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB909009584A GB9009584D0 (en)	1990-04-28	1990-04-28	Mine roof supports

Publications (3)

Publication Number	Publication Date
GB9108582D0 GB9108582D0 (en)	1991-06-05
GB2243394A GB2243394A (en)	1991-10-30
GB2243394B true GB2243394B (en)	1993-11-10

Family

ID=10675159

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
GB909009584A Pending GB9009584D0 (en)	1990-04-28	1990-04-28	Mine roof supports
GB9108582A Expired - Fee Related GB2243394B (en)	1990-04-28	1991-04-22	Mine roof supports

Family Applications Before (1)

Application Number	Title	Priority Date	Filing Date
GB909009584A Pending GB9009584D0 (en)	1990-04-28	1990-04-28	Mine roof supports

Country Status (1)

Country	Link
GB (2)	GB9009584D0 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2116618A (en) *	1982-03-06	1983-09-28	Dowty Mining Equipment Ltd	Mine roof supports

1990
- 1990-04-28 GB GB909009584A patent/GB9009584D0/en active Pending
1991
- 1991-04-22 GB GB9108582A patent/GB2243394B/en not_active Expired - Fee Related

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2116618A (en) *	1982-03-06	1983-09-28	Dowty Mining Equipment Ltd	Mine roof supports

Also Published As

Publication number	Publication date
GB9108582D0 (en)	1991-06-05
GB2243394A (en)	1991-10-30
GB9009584D0 (en)	1990-06-20

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Legal Events

Date	Code	Title	Description
1995-12-20	PCNP	Patent ceased through non-payment of renewal fee	Effective date: 19950422