GB731205A - Improvements in stanchions, pit-props and the like supports - Google Patents
Improvements in stanchions, pit-props and the like supportsInfo
- Publication number
- GB731205A GB731205A GB8333/53A GB833353A GB731205A GB 731205 A GB731205 A GB 731205A GB 8333/53 A GB8333/53 A GB 8333/53A GB 833353 A GB833353 A GB 833353A GB 731205 A GB731205 A GB 731205A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- granular material
- pit
- space
- members
- 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
- 239000008187 granular material Substances 0.000 abstract 5
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000011796 hollow space material Substances 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure
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)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
731,205. Pit props. KRAUT, H., and DOELL, W. March 26, 1953 [March 27, 1952], No. 8333/53. Class 20 (2). A stanchion, pit prop or like load carrying element consists of a pair of telescopic members in which the force acting to close the members one into the other is applied as an upthrust to a settled mass of granular material which fills only partially a hollow space within one of the members. A pit prop consists of an upper prop member a having an annular space d which slidably receives an abutment f formed on the upper edge of the lower prop member e. The granular material g, such as sand or steel shot, is supported on the abutment f and partly fills the space d. The prop is initially set by a wedge h being passed through slots in the lower member e, this assembly operation causing the granular material to be shaken down into a settled state. Thereafter the wedge h is removed, and load on the prop is taken by the granular material. In order to collapse the prop, air is injected through the pipe i into the space d, which disperses or unsettles the granular material to break down its holding effect.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE731205X | 1952-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB731205A true GB731205A (en) | 1955-06-01 |
Family
ID=6637747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8333/53A Expired GB731205A (en) | 1952-03-27 | 1953-03-26 | Improvements in stanchions, pit-props and the like supports |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB731205A (en) |
-
1953
- 1953-03-26 GB GB8333/53A patent/GB731205A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE59401321D1 (en) | Process for obtaining pharmacologically active compounds from complex mixtures | |
| GB731205A (en) | Improvements in stanchions, pit-props and the like supports | |
| GB876872A (en) | Improvements in or relating to face supports for mines | |
| FR1288878A (en) | Tubular reinforcement with removable expander device, for the execution of beams or other similar materials in prestressed concrete | |
| GB844137A (en) | Improvements relating to telescopic props or supports | |
| BE608420A (en) | Retractable support stand for semi-trailer. | |
| FR1201210A (en) | hydraulic mine prop and similar support device | |
| GB854978A (en) | Improvements in supporting elements for mines | |
| FR1508141A (en) | Process for the extraction of metals, in particular from fissile nuclear material, by means of an organic extraction mixture | |
| FR80157E (en) | Process and installation for extracting air from an inert gas mixture | |
| DK103610C (en) | Process for the preparation of 7-chloro-4,6,2'-trimethoxy-6'-methyl-pig-2'-en-4'-ol-3-one or esters thereof. | |
| FR1200691A (en) | Hydraulic support, such as a mine prop | |
| GB770305A (en) | Improvements in and relating to underground roof supports | |
| GB851283A (en) | Improvements in pit props | |
| GB876797A (en) | Improvements in hydraulic pit props | |
| GB814350A (en) | Improvements in roof supports for mine workings | |
| GB818859A (en) | Shaft lining | |
| Pehlke | Metallurgical process engineering | |
| GB897905A (en) | A device for the haulage of timber | |
| DK100997C (en) | Process for the preparation of 17α, 21-dihydroxy-6,16-dimethyl-11-oxygenated-4,6-pregnadiene- or -1,4,6-pregnatrien-3,20-diones or esters thereof. | |
| BE600118A (en) | Method and device for shearing bast fiber stems, as well as the fiber material thus obtained | |
| BE600287A (en) | Method and installation for the continuous extraction of a material from a liquid by means of an extractor liquid. | |
| Bruning | Germany and the Spanish Civil War 1936-1939 | |
| YEE | A TOUCH OF DE STIJL | |
| FR1265761A (en) | Method of adjusting the weight of compressed fibrous material bales |