GB1277156A - Prop on which a roof support bar is secured - Google Patents
Prop on which a roof support bar is securedInfo
- Publication number
- GB1277156A GB1277156A GB3290170A GB3290170A GB1277156A GB 1277156 A GB1277156 A GB 1277156A GB 3290170 A GB3290170 A GB 3290170A GB 3290170 A GB3290170 A GB 3290170A GB 1277156 A GB1277156 A GB 1277156A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- secured
- support bar
- roof support
- july
- 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
- 238000005452 bending Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/10—Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
1277156 Securing roof girders to pit props KLOCKNER-WERKE AG 7 July 1970 [23 July 1969] 32901/70 Heading E1E A roof bar is secured to a prop for relative movement by a bolt 6 which is pretensioned i.e. put under a tensile stress greater than 15 kg/mm<SP>2</SP> over that portion subject to bending moments upon relative loading or movement of the prop and its support bar.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691937318 DE1937318A1 (en) | 1969-07-23 | 1969-07-23 | Stamp to which an expansion cap is attached |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1277156A true GB1277156A (en) | 1972-06-07 |
Family
ID=5740585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3290170A Expired GB1277156A (en) | 1969-07-23 | 1970-07-07 | Prop on which a roof support bar is secured |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE752931A (en) |
DE (1) | DE1937318A1 (en) |
FR (1) | FR2056203A5 (en) |
GB (1) | GB1277156A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2142299A5 (en) * | 1971-06-17 | 1973-01-26 | Bennes Marrel | |
US4004771A (en) * | 1972-09-09 | 1977-01-25 | Gewerkschaft Eisenhutte Westfalia | Ball-and-socket type connections for use with mining apparatus |
FR2505925A1 (en) * | 1981-05-12 | 1982-11-19 | Alsace Mines Potasse | MECHANICAL DEVICE FOR CONNECTING HEAD BETWEEN HEAD OR PEDESTAL HEAD AND PACKAGE OR HAT FOR HOLDING BATTERIES |
-
1969
- 1969-07-23 DE DE19691937318 patent/DE1937318A1/en active Pending
-
1970
- 1970-05-22 FR FR7018794A patent/FR2056203A5/fr not_active Expired
- 1970-07-03 BE BE752931D patent/BE752931A/en unknown
- 1970-07-07 GB GB3290170A patent/GB1277156A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE752931A (en) | 1970-12-16 |
FR2056203A5 (en) | 1971-05-14 |
DE1937318A1 (en) | 1971-02-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |