GB875923A - Improvements in clamping collars for gripping cylindrical members - Google Patents

Improvements in clamping collars for gripping cylindrical members

Info

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
Application number
GB5392/58A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
Original Assignee
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EBERHARD VON CAMPENHAUSEN, WILLY EGGEMANN filed Critical EBERHARD VON CAMPENHAUSEN
Publication of GB875923A publication Critical patent/GB875923A/en
Expired legal-status Critical Current

Links

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.
GB5392/58A 1957-03-13 1958-02-19 Improvements in clamping collars for gripping cylindrical members Expired GB875923A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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