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GB876781A - Improvements in screw-drivers - Google Patents

Improvements in screw-drivers

Info

Publication number
GB876781A
GB876781A GB3620559A GB3620559A GB876781A GB 876781 A GB876781 A GB 876781A GB 3620559 A GB3620559 A GB 3620559A GB 3620559 A GB3620559 A GB 3620559A GB 876781 A GB876781 A GB 876781A
Authority
GB
United Kingdom
Prior art keywords
screwdriver
head
shank
drivers
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
GB3620559A
Inventor
Aart Gijsbertus Nijhuis
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.)
ALKONO AG
Original Assignee
ALKONO AG
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 ALKONO AG filed Critical ALKONO AG
Priority to GB3620559A priority Critical patent/GB876781A/en
Publication of GB876781A publication Critical patent/GB876781A/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
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/008—Allen-type keys

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

876,781. Screwdrivers. ALKOMO A. G. Oct. 26, 1959, No. 36205/59. Class 61. A screwdriver for tightening bolts, screws, &c. having hexagonal socket heads, is provided at its free end with an hexagonal ball shaped head 3 having six faces with one way curvature extending in the longitudinal direction of the shank 1, the construction being such that the cross-sections of the head in a direction perpendicular to the axis of the screwdriver are regular hexagons. The longitudinally curved surfaces are continued over the intermediate part between the shank and head of the screwdriver.
GB3620559A 1959-10-26 1959-10-26 Improvements in screw-drivers Expired GB876781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3620559A GB876781A (en) 1959-10-26 1959-10-26 Improvements in screw-drivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3620559A GB876781A (en) 1959-10-26 1959-10-26 Improvements in screw-drivers

Publications (1)

Publication Number Publication Date
GB876781A true GB876781A (en) 1961-09-06

Family

ID=10385947

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3620559A Expired GB876781A (en) 1959-10-26 1959-10-26 Improvements in screw-drivers

Country Status (1)

Country Link
GB (1) GB876781A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213719A (en) * 1962-11-01 1965-10-26 Robert C Kloack Rotary driving tool with universal action
JPS528294U (en) * 1975-07-07 1977-01-20
US4098152A (en) * 1975-12-09 1978-07-04 Ake Lennart Jonsson Chuck key
JPS54147897U (en) * 1978-04-07 1979-10-15
US4246811A (en) * 1979-09-24 1981-01-27 Bondhus Corporation Ball head polygonal wrench
WO1990001399A1 (en) * 1987-05-06 1990-02-22 Ingvar Sundberg Inclinable polygonal wrench

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213719A (en) * 1962-11-01 1965-10-26 Robert C Kloack Rotary driving tool with universal action
JPS528294U (en) * 1975-07-07 1977-01-20
US4098152A (en) * 1975-12-09 1978-07-04 Ake Lennart Jonsson Chuck key
JPS54147897U (en) * 1978-04-07 1979-10-15
US4246811A (en) * 1979-09-24 1981-01-27 Bondhus Corporation Ball head polygonal wrench
WO1990001399A1 (en) * 1987-05-06 1990-02-22 Ingvar Sundberg Inclinable polygonal wrench

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