GB638743A - Improved telescopic tubular prop - Google Patents

Improved telescopic tubular prop

Info

Publication number
GB638743A
GB638743A GB20282/46A GB2028246A GB638743A GB 638743 A GB638743 A GB 638743A GB 20282/46 A GB20282/46 A GB 20282/46A GB 2028246 A GB2028246 A GB 2028246A GB 638743 A GB638743 A GB 638743A
Authority
GB
United Kingdom
Prior art keywords
wedge
key
slot
plunger
extension
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
GB20282/46A
Inventor
Eugene-Charles Gillet
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.)
TUBES DE VALENCIENNES ET DENAI
Original Assignee
TUBES DE VALENCIENNES ET DENAI
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 TUBES DE VALENCIENNES ET DENAI filed Critical TUBES DE VALENCIENNES ET DENAI
Publication of GB638743A publication Critical patent/GB638743A/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
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/43—Details of wedges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/066—Shores or struts; Chocks telescopic with parts held together by positive means by a wedge
    • 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
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
    • 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
    • E21D15/581—Devices for setting props or chocks in which the props are 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)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

638,743. Pit props. SOC. ANON. DES TUBES DE VALENCIENNES ET DENAIN. July 8, 1946, No. 20282. Convention date, June 8, 1945. [Class 20 (ii)] [Also in Group XXX] A telescopic pit prop comprises a tubular hood supporting plunger 4, Figs. 2, 3 slotted longitudinally and normally freely sliding in a cylindrical inner bearing means 9, 10 at the upper end of a tubular standard 1, the. plunger 4 being expanded radially into locking engagement with the bearing means 9, 10 by a wedge 11 forced into the slot 5 by a key 12, the slot and wedge being tapered upwardly. Hoop rings 9 and a tubular spacer member 10 form the inner bearing means which is provided with an extension 3 to house the wedge I and key 12, the latter having a pair of flanges one of which engages a slot in the back of the wedge 11 and the other a slot in the extension 3. Accidental withdrawal of the key 12 is prevented by means of a removable cap 13 and a spring-urged cotter pin inserted in a hole in the key. A pin 21, Fig. 3, freely slidable in a boss 20 on the extension 3 has its upper end in contact with the lower edge of an annular flange 8, Fig. 2, of a pivotal cap 6 and serves to measure the penetration of the plunger. In operation the plunger 4 is first brought into engagement with a roof cross-bar by means of a pair of keys 25, Fig. 5 (not shown), which are alternately engaged in staggered slots 26, Fig. 2, in the standard or alternatively a hoisting device, Fig. 6 (not shown), (see Group XXX), may be used.
GB20282/46A 1945-06-08 1946-07-08 Improved telescopic tubular prop Expired GB638743A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR918863T 1945-06-08

Publications (1)

Publication Number Publication Date
GB638743A true GB638743A (en) 1950-06-14

Family

ID=9424733

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20282/46A Expired GB638743A (en) 1945-06-08 1946-07-08 Improved telescopic tubular prop

Country Status (5)

Country Link
US (1) US2450374A (en)
BE (1) BE467589A (en)
ES (1) ES176294A1 (en)
FR (1) FR918863A (en)
GB (1) GB638743A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989159A (en) * 1956-02-14 1961-06-20 Andre Rene Marie Emile Ri Foug Connection between tubular members

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522336A (en) * 1946-10-05 1950-09-12 Anderson Nils Erland Stepladder
US2747828A (en) * 1950-04-18 1956-05-29 Becorit Grubenausbau Gmbh Mine post
US6655877B2 (en) * 2002-04-16 2003-12-02 W. David Calhoun Yielding column

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189728648A (en) * 1897-12-04 1898-10-29 William Radford Improvements for Making Cycle and other Frame Joints without Brazing.
US2363752A (en) * 1943-05-20 1944-11-28 Dale C Scott Jack shore

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989159A (en) * 1956-02-14 1961-06-20 Andre Rene Marie Emile Ri Foug Connection between tubular members

Also Published As

Publication number Publication date
BE467589A (en) 1946-09-30
US2450374A (en) 1948-09-28
FR918863A (en) 1947-02-20
ES176294A1 (en) 1947-02-16

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