GB1332716A - Self centring screw - Google Patents
Self centring screwInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2131114A (en) * | 1982-11-25 | 1984-06-13 | Chang Chung Hsing | Screw and screwdriver |
-
1971
- 1971-08-26 GB GB1332716D patent/GB1332716A/en not_active Expired
Cited By (1)
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 |