GB875923A - Improvements in clamping collars for gripping cylindrical members - Google Patents
Improvements in clamping collars for gripping cylindrical membersInfo
- Publication number
- GB875923A GB875923A GB5392/58A GB539258A GB875923A GB 875923 A GB875923 A GB 875923A GB 5392/58 A GB5392/58 A GB 5392/58A GB 539258 A GB539258 A GB 539258A GB 875923 A GB875923 A GB 875923A
- Authority
- GB
- United Kingdom
- Prior art keywords
- collar
- prop
- parts
- block
- yoke
- 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
- 210000002105 tongue Anatomy 0.000 abstract 3
- 210000001331 nose Anatomy 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
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
- E21D15/325—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring by a clamping ring
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)
- Clamps And Clips (AREA)
Abstract
875,923. Telescopic pit props. EGGEMANN, W., and CAMPENHAUSEN, VON E., [trading as SCHWARZ KOMM. GES., HERMANN]. Feb. 19, 1958 [March 13, 1957], No. 5392/58. Class 20(2) [Also in Group XXV] A clamping collar, for example for adjustably securing an upper part 1 of a tubular pit prop in a lower part 2 of the prop, is formed in two parts 3, 4, each having a cross-section such that the collar has the characteristics of a uniformly stressed beam, the internal surface of each collar part extending in a circular arc having a radius which is greater than that of the cylindrical surface of the part 1 by an amount which will enable the two parts 3, 4, when the collar is tightened, to exert on the cylindrical surface of the part 1 a pressure which is substantially uniform along the circumferential length of the surface engaged by the collar. The collar is tightened by means of a yoke 9 and a co-operating pressure block 11, tongues 8 on the two collar parts 3, 4 being gripped between noses 10 on the yoke 9 and the block 11 and the latter being moved in the gripping direction by a wedge 12. The adjacent tongues 8 diverge outwardly, so that when the collar is tightened the facing surfaces of the adjacent tongues 8 are parallel. The collar parts 3, 4 are fixed to the prop part 2 by means of a welded-on bridge strap 5 and welded-on straps 6 and 7, respectively, the collar part 4 being thereby permitted a limited movement relative to the prop part 2. The block 11 is provided with lugs 13 which engage in recesses in the yoke 9 for guiding the movement of the block. Specifications 686,675 and 732,251 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE875923X | 1957-03-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB875923A true GB875923A (en) | 1961-08-23 |
Family
ID=6817483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5392/58A Expired GB875923A (en) | 1957-03-13 | 1958-02-19 | Improvements in clamping collars for gripping cylindrical members |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB875923A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6448172B1 (en) | 1999-02-25 | 2002-09-10 | Nec Corporation | Manufacturing method of forming interconnection in semiconductor device |
-
1958
- 1958-02-19 GB GB5392/58A patent/GB875923A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6448172B1 (en) | 1999-02-25 | 2002-09-10 | Nec Corporation | Manufacturing method of forming interconnection in semiconductor device |
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