GB1332716A - Self centring screw - Google Patents

Self centring screw

Info

Publication number
GB1332716A
GB1332716A GB1332716DA GB1332716A GB 1332716 A GB1332716 A GB 1332716A GB 1332716D A GB1332716D A GB 1332716DA GB 1332716 A GB1332716 A GB 1332716A
Authority
GB
United Kingdom
Prior art keywords
slot
screw
self centring
lewis
centring screw
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
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.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB1332716A publication Critical patent/GB1332716A/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
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F16B23/0015—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially rectangular, e.g. one-slot head

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)

Abstract

1332716 Screwdrivers J E LEWIS and J E LEWIS 12 July 1972 [26 Aug 1971] 40016/71 Heading B3N [Also in Division F2] A screwdriver blade has its end shaped as shown in Fig. 3 to engage a correspondingly shaped diametrically cut slot in the head of a screw, Fig. 1, the central recessed portion of the slot serving to centrally locate the blade within the slot.
GB1332716D 1971-08-26 1971-08-26 Self centring screw Expired GB1332716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4001671 1971-08-26

Publications (1)

Publication Number Publication Date
GB1332716A true GB1332716A (en) 1973-10-03

Family

ID=10412742

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1332716D Expired GB1332716A (en) 1971-08-26 1971-08-26 Self centring screw

Country Status (1)

Country Link
GB (1) GB1332716A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131114A (en) * 1982-11-25 1984-06-13 Chang Chung Hsing Screw and screwdriver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131114A (en) * 1982-11-25 1984-06-13 Chang Chung Hsing Screw and screwdriver

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees