GB1331805A – Jacking devices
– Google Patents
GB1331805A – Jacking devices
– Google Patents
Jacking devices
Info
Publication number
GB1331805A
GB1331805A
GB1443571*[A
GB1443571A
GB1331805A
GB 1331805 A
GB1331805 A
GB 1331805A
GB 1443571 A
GB1443571 A
GB 1443571A
GB 1331805 A
GB1331805 A
GB 1331805A
Authority
GB
United Kingdom
Prior art keywords
jack
bolt
stirrup
conical
plunger
Prior art date
1970-05-22
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
GB1443571*[A
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.)
Individual
Original Assignee
Individual
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.)
1970-05-22
Filing date
1971-05-12
Publication date
1973-09-26
1971-05-12
Application filed by Individual
filed
Critical
Individual
1973-09-26
Publication of GB1331805A
publication
Critical
patent/GB1331805A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
E—FIXED CONSTRUCTIONS
E21—EARTH DRILLING; MINING
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
E21D21/008—Anchoring or tensioning means
E—FIXED CONSTRUCTIONS
E04—BUILDING
E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
E04G25/00—Shores or struts; Chocks
E04G25/04—Shores or struts; Chocks telescopic
E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
E04G25/066—Shores or struts; Chocks telescopic with parts held together by positive means by a wedge
E—FIXED CONSTRUCTIONS
E21—EARTH 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
E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
E21D15/26—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism with screw, worm, or the like, not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure
Abstract
1331805 Jacks D N FORBES 12 May 1971 [22 May 1970] 14435/71 Heading B8J [Also in Division E1] A jack, Fig. 2, comprises a plunger 13 formed with opposed conical recesses 24 formed at the ends of a pilot bore 22. The plunger 13 is surrounded by a stirrup 26 having a crossmember 28 with a central threaded bore 30 receiving a bolt 32 having a conical point complemental to and engaging one recess 24. Opposite the bolt 32 a conical anvil 36 is fixed in the stirrup 26 engaging the other recess 24. In use the jack is positioned between opposed surfaces 11, 12 with the bolt 32 and anvil 36 partially engaged in the recesses 24. Turning the bolt 32 to bring its point nearer the anvil 36 causes a wedge action resulting in the stirrup 26 sliding to the right on the surface 11 as the plunger 13 moves upwards. Fig. 7 shows, in section, a modification wherein the wedging action is produced by a wedge 50 acting between a cross-piece 45 on a stirrup 40 and a rod 48 sliding in a cross-member 44 and having a conical point similar to that of the bolt 32. The jack may be used in conjunction with a pit-prop 10, Fig. 5, which may incorporate friction yielding mechanism 17. As shown the prop may be struck by a long spanner 15 (for the jack shown in Fig. 1) or by a long-handled hammer (for the jack shown in Fig. 7). The jack may also be used to tension roof bolts (90), Fig. 10 (not shown).
GB1443571*[A
1970-05-22
1971-05-12
Jacking devices
Expired
GB1331805A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
ZA703468A
ZA703468B
(en)
1970-05-22
1970-05-22
Substituted jacking devices
Publications (1)
Publication Number
Publication Date
GB1331805A
true
GB1331805A
(en)
1973-09-26
Family
ID=25562003
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1443571*[A
Expired
GB1331805A
(en)
1970-05-22
1971-05-12
Jacking devices
Country Status (5)
Country
Link
US
(1)
US3706441A
(en)
CA
(1)
CA942283A
(en)
DE
(1)
DE2124675A1
(en)
GB
(1)
GB1331805A
(en)
ZA
(1)
ZA703468B
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2362871A
(en)
*
2000-01-26
2001-12-05
Thomas Finan
Quick release jack
GB2526794A
(en)
*
2014-06-02
2015-12-09
Ischebeck Titan Ltd
An assembly for the controlled release of a compression load
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2219902B1
(en)
*
1973-03-01
1979-04-06
Svenska Rotor Maskiner Ab
CA2416644C
(en)
*
2003-01-20
2010-07-20
Paul Gillespie
Concrete slab form system
EP2787165B1
(en)
*
2013-04-04
2016-11-16
Kern Tunneltechnik SA
Support cylinder and formwork assembly with support cylinder
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US1794798A
(en)
*
1927-05-02
1931-03-03
Hiram C Weitzman
Jack
US1850489A
(en)
*
1929-05-10
1932-03-22
Baguley Cyril
Prop for use in mines
1970
1970-05-22
ZA
ZA703468A
patent/ZA703468B/en
unknown
1971
1971-05-12
GB
GB1443571*[A
patent/GB1331805A/en
not_active
Expired
1971-05-18
DE
DE19712124675
patent/DE2124675A1/en
active
Pending
1971-05-21
CA
CA113,592A
patent/CA942283A/en
not_active
Expired
1971-05-24
US
US146104A
patent/US3706441A/en
not_active
Expired – Lifetime
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2362871A
(en)
*
2000-01-26
2001-12-05
Thomas Finan
Quick release jack
GB2362871B
(en)
*
2000-01-26
2002-08-14
Thomas Finan
Quick release jack
GB2526794A
(en)
*
2014-06-02
2015-12-09
Ischebeck Titan Ltd
An assembly for the controlled release of a compression load
GB2526794B
(en)
*
2014-06-02
2018-12-05
Ischebeck Titan Ltd
An assembly for the controlled release of a compression load
Also Published As
Publication number
Publication date
DE2124675A1
(en)
1971-12-23
US3706441A
(en)
1972-12-19
CA942283A
(en)
1974-02-19
ZA703468B
(en)
1971-11-24
Similar Documents
Publication
Publication Date
Title
GB1318726A
(en)
1973-05-31
Anchor nuts
GB1004562A
(en)
1965-09-15
Improvements in fasteners or bushes for anchoring in sheet material or the like
GB1197139A
(en)
1970-07-01
Improvements in Socket Retaining Means for Splined Drive Shafts
GB613923A
(en)
1948-12-07
Improvements in or relating to mine props
ES313042A1
(en)
1966-03-01
Construction bars and joints therefor
GB1534840A
(en)
1978-12-06
Expansible dowel
GB1331805A
(en)
1973-09-26
Jacking devices
GB1369907A
(en)
1974-10-09
Rock splitting apparatus
GB1193673A
(en)
1970-06-03
Apparatus for Splitting Rock
GB1037734A
(en)
1966-08-03
Improvements in mine roof bars
GB825190A
(en)
1959-12-09
Improvements relating to expansion bolt elements
GB1290897A
(en)
1972-09-27
GB840741A
(en)
1960-07-13
Improvements relating to anchor bolts
GB1329125A
(en)
1973-09-05
Mine roof supports
GB1089510A
(en)
1967-11-01
Anchor device for use with a hollow bolt rod
GB912987A
(en)
1962-12-12
Improvements in or relating to rock bolts
GB865922A
(en)
1961-04-26
Mine roof supports
GB1020865A
(en)
1966-02-23
Improvements in anchor bolts
GB1380683A
(en)
1975-01-15
Pallet tiering frame
GB769790A
(en)
1957-03-13
Improvements in and relating to expansion bolts
GB731217A
(en)
1955-06-01
Improvements relating to pit props
FR2330902A1
(en)
1977-06-03
Anchor bolt for use in concrete – has nut with inclined slots expanded by bearing on tapered shank portion
GB481260A
(en)
1938-03-08
Improvements in or relating to mine-roof supports
GB1202067A
(en)
1970-08-12
Breaker bolt
GB1251758A
(en)
1971-10-27
Legal Events
Date
Code
Title
Description
1974-02-06
PS
Patent sealed [section 19, patents act 1949]
1980-01-09
PCNP
Patent ceased through non-payment of renewal fee
