GB413474A - Improvements in or relating to mine chocks - Google Patents

Improvements in or relating to mine chocks

Info

Publication number
GB413474A
GB413474A GB1402433A GB1402433A GB413474A GB 413474 A GB413474 A GB 413474A GB 1402433 A GB1402433 A GB 1402433A GB 1402433 A GB1402433 A GB 1402433A GB 413474 A GB413474 A GB 413474A
Authority
GB
United Kingdom
Prior art keywords
locking device
main body
pivoted
body portion
relating
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
GB1402433A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1402433A priority Critical patent/GB413474A/en
Publication of GB413474A publication Critical patent/GB413474A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • 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
    • E21D15/60—Devices for withdrawing props or chocks

Abstract

413,474. Wedges. TEALE, J. W., Costhorpe, Carlton, Nottinghamshire. May 15, 1933, No. 14024. [Class 89 (ii).] A chock for use in mines comprises a main body portion 1 with an open end and having multiple wedge portions 2 inclined in a similar direction, a movable portion 5 having coacting wedge portions 6, and a locking device 4 movably secured to the main body portion. The locking device may be pivoted at 3 to the main portion and is provided with an extension 7 to receive hammer blows for releasing the lock. The locking porton may be apertured to receive the hook of a "Sylvester" for removal or a shackle 8 may be provided for this purpose pivoted to the locking device and adapted to act as a strut to the locking device in the expanded chock position.
GB1402433A 1933-05-15 1933-05-15 Improvements in or relating to mine chocks Expired GB413474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1402433A GB413474A (en) 1933-05-15 1933-05-15 Improvements in or relating to mine chocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1402433A GB413474A (en) 1933-05-15 1933-05-15 Improvements in or relating to mine chocks

Publications (1)

Publication Number Publication Date
GB413474A true GB413474A (en) 1934-07-19

Family

ID=10033597

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1402433A Expired GB413474A (en) 1933-05-15 1933-05-15 Improvements in or relating to mine chocks

Country Status (1)

Country Link
GB (1) GB413474A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740953C (en) * 1941-03-29 1943-11-01 Eduard Pieper Wall-like support member movable by traction means, for fracture construction
DE741415C (en) * 1939-04-15 1943-11-15 Karl Brieden Hiking pillar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741415C (en) * 1939-04-15 1943-11-15 Karl Brieden Hiking pillar
DE740953C (en) * 1941-03-29 1943-11-01 Eduard Pieper Wall-like support member movable by traction means, for fracture construction

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