GB1249979A - Improvements in tensioning devices - Google Patents

Improvements in tensioning devices

Info

Publication number
GB1249979A
GB1249979A GB5797067A GB5797067A GB1249979A GB 1249979 A GB1249979 A GB 1249979A GB 5797067 A GB5797067 A GB 5797067A GB 5797067 A GB5797067 A GB 5797067A GB 1249979 A GB1249979 A GB 1249979A
Authority
GB
United Kingdom
Prior art keywords
elongated member
shaft
tensioning
pistons
partitions
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
GB5797067A
Inventor
Ernest Albert Chadwick
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB5797067A priority Critical patent/GB1249979A/en
Publication of GB1249979A publication Critical patent/GB1249979A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B29/00—Accessories
    • B25B29/02—Bolt tensioners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/04—Screwed connections specially modified in view of tensile load; Break-bolts for maintaining a tensile load

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Abstract

1,249,979. Tensioning device; tensioning bolts. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 11 Feb., 1969, [20 Dec., 1967], No. 57970/67. Headings F2G and F2H. A tensioning device for an elongated member such as a threaded bolt 13, stud, rod on a rolled, drawn, extruded or forged metallic member comprises a housing 1 provided with a stepped bore there being seated on at least some of the shoulders 7 formed by the stepped bore housing partitions 6 sealed to the bore walls. The device is further provided with a stepped shaft 2 having at least a plurality of pistons 3 seated against some of the shoulders 4 formed by the stepping of the shaft. The partitions 6 and pistons 3 are in pairs such that they define therebetween fluid tight annular chambers 30 having pressure fluid inlets 22. The device further comprises a means for co-axially securing the shaft 2 to the elongated member. In the construction shown the other annular chambers 26 defined between the partitions 6 and pistons 3 are replied to atmosphere and the searing means consists of a coupling nut 12. The shaft 2 is formed with an axial bore 31 through which a rod 32 extends to engage the end of the elongated member. By measuring the distance travelled by the outer end of the rod 32 during tensioning the elongation of the elongated member is ascertained. When a bolt 13 is tensioned the nut 20 thereof is turned within the device by a nut turning collar 21 and a collar bar 27 which extends through an arcuate slot 28. The shaft 2 and housing 1 may comprise a plurality of easily disconnectible sections. The device for screwing the shaft to the elongated member may comprise shaped collets seated in grooves in the elongated member or wedges passing through preformed holes in the elongated member.
GB5797067A 1967-12-20 1967-12-20 Improvements in tensioning devices Expired GB1249979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5797067A GB1249979A (en) 1967-12-20 1967-12-20 Improvements in tensioning devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5797067A GB1249979A (en) 1967-12-20 1967-12-20 Improvements in tensioning devices

Publications (1)

Publication Number Publication Date
GB1249979A true GB1249979A (en) 1971-10-13

Family

ID=10480485

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5797067A Expired GB1249979A (en) 1967-12-20 1967-12-20 Improvements in tensioning devices

Country Status (1)

Country Link
GB (1) GB1249979A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733441A1 (en) * 1995-03-17 1996-09-25 John K. Junkers Hydraulic tensioner
EP3566815A1 (en) * 2018-04-23 2019-11-13 Schaaf GmbH & Co. KG Fastening arrangement for tensioning fixing means comprising at least one anti-twist device
EP3546116B1 (en) 2018-03-29 2020-10-14 Hohmann, Jörg Device for tightening screw joints

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733441A1 (en) * 1995-03-17 1996-09-25 John K. Junkers Hydraulic tensioner
CN1047549C (en) * 1995-03-17 1999-12-22 约翰·K·琼克斯 Hydraulic tensioner
EP3546116B1 (en) 2018-03-29 2020-10-14 Hohmann, Jörg Device for tightening screw joints
EP3566815A1 (en) * 2018-04-23 2019-11-13 Schaaf GmbH & Co. KG Fastening arrangement for tensioning fixing means comprising at least one anti-twist device

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