GB575978A - Screws - Google Patents

Screws

Info

Publication number
GB575978A
GB575978A GB758144A GB758144A GB575978A GB 575978 A GB575978 A GB 575978A GB 758144 A GB758144 A GB 758144A GB 758144 A GB758144 A GB 758144A GB 575978 A GB575978 A GB 575978A
Authority
GB
United Kingdom
Prior art keywords
screw
driver
grooves
ribs
shape
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
GB758144A
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.)
Phillips Screw Co
Original Assignee
Phillips Screw Co
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 Phillips Screw Co filed Critical Phillips Screw Co
Priority to GB758144A priority Critical patent/GB575978A/en
Publication of GB575978A publication Critical patent/GB575978A/en
Priority to AT172380D priority patent/AT172380B/en
Priority to DE1950G0003294 priority patent/DE966580C/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
    • F16B23/0076—Specially shaped nuts or heads of bolts or screws for rotations by a tool causing slipping of the tool in loosening rotation, i.e. disabling unscrewing unless another tool is used

Landscapes

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

Abstract

575,978. Screw-drivers. DEHN, F. B., (Phillips Screw Co.). April 24, 1944, No. 7581. , [Class 61 (iii)] [Also in Groups XXII and XXV] A driver, for engaging recesses in screw heads of the type comprising alternate ribs 4 and grooves 6, the side walls 9 and the faces of' the ribs and the bottoms of the grooves tapering uniformly towards the screwaxis, is identical in shape with the punch that has sharp edges 11. The shape enables the driver to be wedged more securely in the screw.
GB758144A 1943-01-19 1944-04-24 Screws Expired GB575978A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB758144A GB575978A (en) 1943-01-19 1944-04-24 Screws
AT172380D AT172380B (en) 1943-01-19 1950-07-03 screwdriver
DE1950G0003294 DE966580C (en) 1943-01-19 1950-08-15 Phillips screw

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US172380XA 1943-01-19 1943-01-19
GB758144A GB575978A (en) 1943-01-19 1944-04-24 Screws

Publications (1)

Publication Number Publication Date
GB575978A true GB575978A (en) 1946-03-13

Family

ID=21781505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB758144A Expired GB575978A (en) 1943-01-19 1944-04-24 Screws

Country Status (3)

Country Link
AT (1) AT172380B (en)
DE (1) DE966580C (en)
GB (1) GB575978A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9763754B2 (en) 2011-07-06 2017-09-19 Nobel Biocare Services Ag Screw and driver tool
US10912572B2 (en) 2013-01-11 2021-02-09 Nobel Biocare Services Ag Dental drill bit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB427892A (en) * 1933-05-09 1935-04-29 Fitzpatrick Corp Improvements in screw drivers
US2046343A (en) * 1934-07-03 1936-07-07 Phillips Screw Co Screw
NL42923C (en) * 1934-07-03
US2046839A (en) * 1935-01-15 1936-07-07 Phillips Screw Co Screw
US2066484A (en) * 1935-01-15 1937-01-05 Philips Screw Company Screw

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9763754B2 (en) 2011-07-06 2017-09-19 Nobel Biocare Services Ag Screw and driver tool
US11382725B2 (en) 2011-07-06 2022-07-12 Nobel Biocare Services, Ag Screw and driver tool
US10912572B2 (en) 2013-01-11 2021-02-09 Nobel Biocare Services Ag Dental drill bit

Also Published As

Publication number Publication date
DE966580C (en) 1957-08-22
AT172380B (en) 1952-09-10

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