GB808509A - Improvements in and relating to strata bolts - Google Patents

Improvements in and relating to strata bolts

Info

Publication number
GB808509A
GB808509A GB325456A GB325456A GB808509A GB 808509 A GB808509 A GB 808509A GB 325456 A GB325456 A GB 325456A GB 325456 A GB325456 A GB 325456A GB 808509 A GB808509 A GB 808509A
Authority
GB
United Kingdom
Prior art keywords
head
wedge
bore
feb
anchor
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
GB325456A
Inventor
Harry Stevenson
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.)
Hadfields Ltd
Original Assignee
Hadfields 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 Hadfields Ltd filed Critical Hadfields Ltd
Priority to GB325456A priority Critical patent/GB808509A/en
Publication of GB808509A publication Critical patent/GB808509A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/008—Anchoring or tensioning means

Abstract

808,509. Anchor-bolts. HADFIELDS Ltd. Feb. 1, 1957 [Feb. 1, 1956], No. 3254/56. Class 89(1) An anchor-bolt for holding rock-strata &c., comprises a bolt-member 10, e.g. of forged-steel, with a head 14, and a wedge 18, e.g. of cast-steel, of substantially the same length as the head and assembled therewith to form a composite-head of circular or rectangular cross-section. The head has a surface sloping toward the axis of member 10 and may be formed with a part 12 bent back against the member. In use, the wedge is carried into a bore by a lug 16 on the head, and when a nut is tightened on a screwed-part of the member, the head and wedge move relatively to enlarge the composite-head to grip the bore-wall. To facilitate this relative movement, the wedge may carry a rubberdisc 26 to grip the bore-wall frictionally.
GB325456A 1956-02-01 1956-02-01 Improvements in and relating to strata bolts Expired GB808509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB325456A GB808509A (en) 1956-02-01 1956-02-01 Improvements in and relating to strata bolts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB325456A GB808509A (en) 1956-02-01 1956-02-01 Improvements in and relating to strata bolts

Publications (1)

Publication Number Publication Date
GB808509A true GB808509A (en) 1959-02-04

Family

ID=9754858

Family Applications (1)

Application Number Title Priority Date Filing Date
GB325456A Expired GB808509A (en) 1956-02-01 1956-02-01 Improvements in and relating to strata bolts

Country Status (1)

Country Link
GB (1) GB808509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103711507A (en) * 2013-12-05 2014-04-09 中国矿业大学 Method for controlling deformation of large broken rock zone roadway by using multi-steel stranded wire combined supporting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103711507A (en) * 2013-12-05 2014-04-09 中国矿业大学 Method for controlling deformation of large broken rock zone roadway by using multi-steel stranded wire combined supporting device

Similar Documents

Publication Publication Date Title
GB841751A (en) Improvements in or relating to herbicidal compositions of matter
GB813571A (en) Improvements relating to screw-threaded fasteners and drivers therefor
GB834787A (en) Improvements relating to bolts
GB854792A (en) Improvements relating to screw nuts
GB951322A (en) Improvements in and relating to shelf brackets
GB808509A (en) Improvements in and relating to strata bolts
GB904899A (en) Improvements relating to anchor bolts
GB859317A (en) Agricultural disc mounting
GB840759A (en) Improvements in the manufacture of studs, bolts, screws, and like components
GB769235A (en) Improvements in or relating to fastening devices or studs
GB844753A (en) Improvements in or relating to lathe and like tools and tips therefor
GB819406A (en) A nut unit
GB863044A (en) Pipe brackets
GB814686A (en) Improvements in pens for cattle
GB862160A (en) Improvements in or relating to anchor-nuts
USD184212S (en) Computing device
GB932123A (en) Improvements relating to furniture
GB778547A (en) A new or improved weld nut
GB568219A (en) Ploughs and other agricultural implements
GB879672A (en) A new or improved bush for use in conjunction with electrical equipment
GB825003A (en) A new or improved removable roof-or wall-supporting device for use in coal mining and like operations
GB890564A (en) Improvements in and relating to fastener devices
GB761581A (en) Improvements relating to diamond tools
GB919660A (en) An improved digging and loading device
USD186954S (en) Speed reducer or similar article