GB1331994A - Tensioning devices - Google Patents

Tensioning devices

Info

Publication number
GB1331994A
GB1331994A GB4586970A GB4586970A GB1331994A GB 1331994 A GB1331994 A GB 1331994A GB 4586970 A GB4586970 A GB 4586970A GB 4586970 A GB4586970 A GB 4586970A GB 1331994 A GB1331994 A GB 1331994A
Authority
GB
United Kingdom
Prior art keywords
tendon
chuck
spacer
release
jaws
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
GB4586970A
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.)
Simms J S
Original Assignee
Simms J S
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 Simms J S filed Critical Simms J S
Publication of GB1331994A publication Critical patent/GB1331994A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/121—Construction of stressing jacks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49815—Disassembling
    • Y10T29/49822—Disassembling by applying force
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/49874—Prestressing rod, filament or strand
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/5383—Puller or pusher means, contained force multiplying operator having fluid operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

1331994 Prestressed concrete J S SIMMS 25 Sept 1970 [26 Sept 1969] 45869/70 Heading E1W [Also in Division F2] To facilitate the cutting of prestressing tendons in a pre-tensioned or post-tensioned concrete construction, a slotted spacer e.g. 202, is employed inside a jacking chair, e.g. 221, between a chuck e.g. 225 with gripping jaws and either an end wall 211 of a prestressing bed or an end plate 315 of the concrete construction. In the. former embodiment (Fig. 12), a release plunger 203 is mounted on the tendon to release the jaws of the chuck after the tendon is further stretched by a fluid-actuated jack after the concrete is set, and the slotted spacer has been removed from the tendon. In the latter embodiment (Fig. 13), the release plunger is not required, the tendon 305 being grouted in its sheath 317 before de-tensioning, and thereafter welded at 322 to plate 315. The chuck 310 and spacer 302 are rewound before this welding by re-tensioning the tendon to a small degree, allowing the spacer to be removed, there being enough room for the chuck to be moved towards the plate 315 to release the jaws thereof.
GB4586970A 1969-09-26 1970-09-25 Tensioning devices Expired GB1331994A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86136469A 1969-09-26 1969-09-26

Publications (1)

Publication Number Publication Date
GB1331994A true GB1331994A (en) 1973-09-26

Family

ID=25335591

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4586970A Expired GB1331994A (en) 1969-09-26 1970-09-25 Tensioning devices

Country Status (3)

Country Link
US (1) US3703030A (en)
CA (1) CA982790A (en)
GB (1) GB1331994A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4646410A (en) * 1985-01-28 1987-03-03 Good Leland F Anchor removing assembly
US6224036B1 (en) 1997-01-17 2001-05-01 Applied Power Inc. Concrete reinforcement cable tensioner
FR2818676B1 (en) * 2000-12-27 2003-03-07 Freyssinet Int Stup METHOD FOR DISASSEMBLING A PRE-STRESS CABLE AND DEVICE FOR IMPLEMENTING THE SAME
US9381602B2 (en) * 2014-05-14 2016-07-05 General Electric Company Turbomachine bucket displacement apparatus and method of use
MX2018013598A (en) 2016-05-12 2019-08-05 Fdh Infrastructure Services Llc Rod de-tensioning device and methods of operating the same.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194536A (en) * 1963-03-06 1965-07-13 James S Simms Pre-stressed concrete reinforced strand tensioning device
US3184219A (en) * 1963-06-11 1965-05-18 James S Simms Tensioning units
US3491431A (en) * 1967-08-25 1970-01-27 Bernard B Pewitt Method and devices for post-tensioning concrete and structural materials

Also Published As

Publication number Publication date
US3703030A (en) 1972-11-21
CA982790A (en) 1976-02-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee