GB686297A - Screw thread inserts for moulded or cast material - Google Patents

Screw thread inserts for moulded or cast material

Info

Publication number
GB686297A
GB686297A GB1597051A GB1597051A GB686297A GB 686297 A GB686297 A GB 686297A GB 1597051 A GB1597051 A GB 1597051A GB 1597051 A GB1597051 A GB 1597051A GB 686297 A GB686297 A GB 686297A
Authority
GB
United Kingdom
Prior art keywords
hole
coil
notches
bolt
edge
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
GB1597051A
Inventor
John O Forster
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.)
Heli Coil Corp
Original Assignee
Heli Coil Corp
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 Heli Coil Corp filed Critical Heli Coil Corp
Priority to GB1597051A priority Critical patent/GB686297A/en
Publication of GB686297A publication Critical patent/GB686297A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Abstract

686,297. Bolt-hole bushes. HELI-COIL CORPORATION. July 5,1951, No. 15970/51. Class 89(i) A helical wire insert to form a screw head in a hole in a material of low tensile strength is shaped so that the exterior also forms a thread with one face 8 at an angle between fifteen and thirty degrees to the axis and the other substantially normal thereto. The coil is wound with the leading end 17 slightly smaller than the hole into which it is to be inserted, axial pressure then causing the larger diameter turns to contract. When the coil is in place it is expanded to embed the edge 9 into the wall 20 of the hole either by a tool or by the bolt. The edge 9 may be interrupted, to form teeth in one or more turns, by forming notches 20 with symmetrical flanks. Notches of other forms are illustrated, and the notches may be replaced by a pair of opposed plates. The wire may be of the section shown on Fig. 9 the double incline 34, 35 permitting assembly, in a through hole, from either side.
GB1597051A 1951-07-05 1951-07-05 Screw thread inserts for moulded or cast material Expired GB686297A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1597051A GB686297A (en) 1951-07-05 1951-07-05 Screw thread inserts for moulded or cast material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1597051A GB686297A (en) 1951-07-05 1951-07-05 Screw thread inserts for moulded or cast material

Publications (1)

Publication Number Publication Date
GB686297A true GB686297A (en) 1953-01-21

Family

ID=10068860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1597051A Expired GB686297A (en) 1951-07-05 1951-07-05 Screw thread inserts for moulded or cast material

Country Status (1)

Country Link
GB (1) GB686297A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073244B (en) * 1955-12-27 1960-01-14 Heli-Coil Corporation Danbury, Conn (V St A) Screw connection with a nut body made of relatively white building material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073244B (en) * 1955-12-27 1960-01-14 Heli-Coil Corporation Danbury, Conn (V St A) Screw connection with a nut body made of relatively white building material

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