FI941752A - Screw with holes - Google Patents

Screw with holes Download PDF

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Publication number
FI941752A
FI941752A FI941752A FI941752A FI941752A FI 941752 A FI941752 A FI 941752A FI 941752 A FI941752 A FI 941752A FI 941752 A FI941752 A FI 941752A FI 941752 A FI941752 A FI 941752A
Authority
FI
Finland
Prior art keywords
screw
depression
drive partitions
tip
cross
Prior art date
Application number
FI941752A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI105056B (en
FI941752A0 (en
Inventor
Katsumi Shinjo
Original Assignee
Shinjo Seisakusho Yk
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 Shinjo Seisakusho Yk filed Critical Shinjo Seisakusho Yk
Priority to FI941752A priority Critical patent/FI105056B/en
Publication of FI941752A0 publication Critical patent/FI941752A0/en
Publication of FI941752A publication Critical patent/FI941752A/en
Application granted granted Critical
Publication of FI105056B publication Critical patent/FI105056B/en

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  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Manipulator (AREA)

Abstract

A cross-head screw has a depression 12 formed in the end of the screw, and the depression is formed by superimposing two holes 14 in the form of equilateral triangles, which both have curved angles 13, and are arranged coaxially with a 60-degree phase offset around the axis of the screw. The depression thus has six notches 15 alternating with six drive partitions 16 with side walls 16a, which extend parallel with the axis, and the inner ridge of the partition is a conically curved grip wall 18, which slopes inwards towards the bottom 17 of the depression 12. The cross-sectional area A of the notch 5 is greater than the cross-sectional area B of each partition. The tip 25 of a screw-driver has six drive partitions 27 conforming to the notches 15, and six valleys 28, which are each located between the adjoining drive partitions and correspond to the drive partitions 16 in the depression 12, so that a gripping action is produced between the depression and the tip, the drive partitions can be reinforced and any conventional torx screw tip can be used with the screw-driver. <IMAGE>
FI941752A 1994-04-15 1994-04-15 Slotted screw FI105056B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI941752A FI105056B (en) 1994-04-15 1994-04-15 Slotted screw

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI941752 1994-04-15
FI941752A FI105056B (en) 1994-04-15 1994-04-15 Slotted screw

Publications (3)

Publication Number Publication Date
FI941752A0 FI941752A0 (en) 1994-04-15
FI941752A true FI941752A (en) 1995-10-16
FI105056B FI105056B (en) 2000-05-31

Family

ID=8540527

Family Applications (1)

Application Number Title Priority Date Filing Date
FI941752A FI105056B (en) 1994-04-15 1994-04-15 Slotted screw

Country Status (1)

Country Link
FI (1) FI105056B (en)

Also Published As

Publication number Publication date
FI105056B (en) 2000-05-31
FI941752A0 (en) 1994-04-15

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Legal Events

Date Code Title Description
MA Patent expired