GB779791A - Improvements relating to end caps for pit-props - Google Patents
Improvements relating to end caps for pit-propsInfo
- Publication number
- GB779791A GB779791A GB3633954A GB3633954A GB779791A GB 779791 A GB779791 A GB 779791A GB 3633954 A GB3633954 A GB 3633954A GB 3633954 A GB3633954 A GB 3633954A GB 779791 A GB779791 A GB 779791A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- pit
- props
- end caps
- improvements 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
Links
- 239000003245 coal Substances 0.000 abstract 1
- 238000005065 mining Methods 0.000 abstract 1
- 238000005096 rolling process Methods 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
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
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)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
779,791. Pit props. DOWTY MINING EQUIPMENT, Ltd. Dec. 15, 1955 [Dec. 15, 1954], No. 36339/54. Class 20(2) A pit prop has end caps 10 of large area having sockets 12 in which the end 28 of the prop has rolling contact and spring- pressed bolts 23 return the prop 20 into alignment with the cap after tilting of the prop. The cap is reinforced by fins 13 on four of which at right angles the sockets 14 for the spring bolts are mounted. A peg 29 on the prop engages a recess in the socket 12. A washer 32 prevents coal &c. en-. tering the socket.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3633954A GB779791A (en) | 1954-12-15 | 1954-12-15 | Improvements relating to end caps for pit-props |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3633954A GB779791A (en) | 1954-12-15 | 1954-12-15 | Improvements relating to end caps for pit-props |
Publications (1)
Publication Number | Publication Date |
---|---|
GB779791A true GB779791A (en) | 1957-07-24 |
Family
ID=10387240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3633954A Expired GB779791A (en) | 1954-12-15 | 1954-12-15 | Improvements relating to end caps for pit-props |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB779791A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3089680A (en) * | 1960-08-22 | 1963-05-14 | Deve Vagn | Shifting jack |
US3530678A (en) * | 1967-04-28 | 1970-09-29 | Karl Marie Groetschel | Position restoring devices for mine roof props |
US3832856A (en) * | 1971-12-14 | 1974-09-03 | Oesterr Alpine Montan | Device for vertically positioning the props of a mine roof supporting frame |
US4139324A (en) * | 1977-01-24 | 1979-02-13 | Josef Krings | Bracing system glide shoe for trench sheeting equipment |
US4962285A (en) * | 1988-11-04 | 1990-10-09 | Baker William H | Electrically groundable swimming pool deck anchor of plastic material |
-
1954
- 1954-12-15 GB GB3633954A patent/GB779791A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3089680A (en) * | 1960-08-22 | 1963-05-14 | Deve Vagn | Shifting jack |
US3530678A (en) * | 1967-04-28 | 1970-09-29 | Karl Marie Groetschel | Position restoring devices for mine roof props |
US3832856A (en) * | 1971-12-14 | 1974-09-03 | Oesterr Alpine Montan | Device for vertically positioning the props of a mine roof supporting frame |
US4139324A (en) * | 1977-01-24 | 1979-02-13 | Josef Krings | Bracing system glide shoe for trench sheeting equipment |
US4962285A (en) * | 1988-11-04 | 1990-10-09 | Baker William H | Electrically groundable swimming pool deck anchor of plastic material |
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