GB636376A - Improvements in and relating to collapsible props or chocks for mine roof supports and like purposes - Google Patents
Improvements in and relating to collapsible props or chocks for mine roof supports and like purposesInfo
- Publication number
- GB636376A GB636376A GB3225147A GB3225147A GB636376A GB 636376 A GB636376 A GB 636376A GB 3225147 A GB3225147 A GB 3225147A GB 3225147 A GB3225147 A GB 3225147A GB 636376 A GB636376 A GB 636376A
- Authority
- GB
- United Kingdom
- Prior art keywords
- upright
- support
- roof supports
- main
- chocks
- 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
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
- E21D15/60—Devices for withdrawing props or chocks
Abstract
636,376. Mine-roof supports. KAY, P. Dec. 6, 1947, No. 32251. [Class 20 (ii)] A support for mine-roofs &c. comprises a main upright 1 rigidly secured to a base 2 having a bent up front to facilitate transport, a load-supporting member 10 being pivoted at 15 to the main upright and having a swinging arm 17 adapted to bear on a second upright 3 rigidly secured to the main upright 1 and to the base 2. Arcuate bearing surfaces 5, 9 are provided on the main'upright and member 10 respectively. A wedge 7 mounted in guide 6 is driven transversely of the uprights 1, 3, to displace the arm 17 when it is desired to release the support. The arm 17 may also be pulled clear of the upright 3 to release the support. An eye 8 is provided for the attachment of a chain &c. to transfer the support to a different position. Specifications 356,284 and 383,340 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3225147A GB636376A (en) | 1947-12-06 | 1947-12-06 | Improvements in and relating to collapsible props or chocks for mine roof supports and like purposes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3225147A GB636376A (en) | 1947-12-06 | 1947-12-06 | Improvements in and relating to collapsible props or chocks for mine roof supports and like purposes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB636376A true GB636376A (en) | 1950-04-26 |
Family
ID=10335694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3225147A Expired GB636376A (en) | 1947-12-06 | 1947-12-06 | Improvements in and relating to collapsible props or chocks for mine roof supports and like purposes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB636376A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351864A (en) * | 2021-12-21 | 2022-04-15 | 中国建筑第八工程局有限公司 | Self-balancing pressure ring beam structure system of cable net roof structure |
-
1947
- 1947-12-06 GB GB3225147A patent/GB636376A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351864A (en) * | 2021-12-21 | 2022-04-15 | 中国建筑第八工程局有限公司 | Self-balancing pressure ring beam structure system of cable net roof structure |
| CN114351864B (en) * | 2021-12-21 | 2023-10-13 | 中国建筑第八工程局有限公司 | Self-balancing compression ring beam structure system of cable network roof structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB994663A (en) | Portable oil well drilling apparatus | |
| ES301967A1 (en) | Improvements in replacable hooks to suspend roof loads of trucks, trailers and similar. (Machine-translation by Google Translate, not legally binding) | |
| GB758080A (en) | Racks for supporting bottles or the like | |
| GB636376A (en) | Improvements in and relating to collapsible props or chocks for mine roof supports and like purposes | |
| GB1179970A (en) | A Device for Use with a Ladder. | |
| GB1145606A (en) | Lowerable a-frame assembly for mobile cranes and the like | |
| GB676138A (en) | Improvements in and relating to supporting struts for stanchions and the like | |
| GB1194788A (en) | An Excavating and/or Loading Device | |
| GB1504749A (en) | Coupler for scaffolding | |
| GB1245939A (en) | Portable collapsible work bench | |
| GB684198A (en) | Scaffold support | |
| GB694752A (en) | Improvements in and relating to collapsible supports or stands | |
| GB723692A (en) | An improved chock release for use in mines and the like | |
| GB838955A (en) | An improved leg or support for stabilising and levelling caravans and for like purposes | |
| GB697751A (en) | Improvements connected with scaffolding for chimney stacks and the like | |
| GB610177A (en) | Improvements in or relating to frames or stands for photographs, pictures or the like | |
| GB621540A (en) | An improvement in cable stoppers | |
| GB760727A (en) | Improvements in or relating to display stands or supports | |
| GB564212A (en) | Improvements relating to pit props and the like | |
| GB853041A (en) | Improvements in or relating to support elements for mine supporting systems | |
| GB1146329A (en) | Improvements in and relating to folding bottle-carriers | |
| GB716061A (en) | Supporting structure for shuttering for casting concrete structures | |
| GB622552A (en) | Improvements in clothes-line props | |
| GB622519A (en) | Improvements in or relating to gate and door supports | |
| GB1217466A (en) | Improvements in or relating to devices for the extension of pit props |