GB813848A - Improvements in and relating to hollow-section (hexagonal) inner pit prop member - Google Patents

Improvements in and relating to hollow-section (hexagonal) inner pit prop member

Info

Publication number
GB813848A
GB813848A GB12320/56A GB1232056A GB813848A GB 813848 A GB813848 A GB 813848A GB 12320/56 A GB12320/56 A GB 12320/56A GB 1232056 A GB1232056 A GB 1232056A GB 813848 A GB813848 A GB 813848A
Authority
GB
United Kingdom
Prior art keywords
section
hollow
hexagonal
relating
pit prop
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
GB12320/56A
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.)
Gutehoffnungshutte Sterkrade AG
Original Assignee
Gutehoffnungshutte Sterkrade AG
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 Gutehoffnungshutte Sterkrade AG filed Critical Gutehoffnungshutte Sterkrade AG
Publication of GB813848A publication Critical patent/GB813848A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D15/502—Prop bodies characterised by their shape, e.g. of specified cross-section

Abstract

813,848. Pitprops. GUTEHOFFNUNGSHUTTE STERKRADE, A. G. April 23, 1956 [June 27, 1955], No. 12320/56. Class 20(2) The inner member of a pit prop comprises a hollow hexagonal sectioned member having three alternate sides 1 which are internally of trough shape and adapted to provide pressure faces on their outer surfaces for the gripping forces of the clamp, the three intermediate sides 2 being externally of trough shape. The section may be integral as in Fig. 1 or may be formed from two longitudinal members I, II welded together at 4 as shown in Fig. 2.
GB12320/56A 1955-06-27 1956-04-23 Improvements in and relating to hollow-section (hexagonal) inner pit prop member Expired GB813848A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE813848X 1955-06-27

Publications (1)

Publication Number Publication Date
GB813848A true GB813848A (en) 1959-05-27

Family

ID=6734373

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12320/56A Expired GB813848A (en) 1955-06-27 1956-04-23 Improvements in and relating to hollow-section (hexagonal) inner pit prop member

Country Status (1)

Country Link
GB (1) GB813848A (en)

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