GB562248A - Improvements in or relating to screws and nuts - Google Patents

Improvements in or relating to screws and nuts

Info

Publication number
GB562248A
GB562248A GB15792/42A GB1579242A GB562248A GB 562248 A GB562248 A GB 562248A GB 15792/42 A GB15792/42 A GB 15792/42A GB 1579242 A GB1579242 A GB 1579242A GB 562248 A GB562248 A GB 562248A
Authority
GB
United Kingdom
Prior art keywords
spanner
nuts
screws
nut
engagement
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
GB15792/42A
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.)
Sulzer AG
Original Assignee
Sulzer AG
Sulzer Freres SA
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 Sulzer AG, Sulzer Freres SA filed Critical Sulzer AG
Publication of GB562248A publication Critical patent/GB562248A/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)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

562,248. Screws and nuts. SULZER FRERES SOC. ANON. Nov. 9, 1942, No. 15792. Convention date, Dec. 9,1941. [Classes 89 (i) and 89 (ii)] Screws and nuts have heads so formed that a spanner can be employed to loosen but cannot be used to tighten them. A nut has a wavy edge 1 to permit screwing up by hand. Projections 6 rising from the nut have flats 7 for engagement by an open jawed spanner in the direction of the arrow 3. If the.spanner be turned in the reverse direction, cam surfaces 8 effect the disengagement of the spanner and nut A modified form is illustrated in which screw head has a recess for unscrewing engagement by a hexagonal wrench.
GB15792/42A 1941-12-09 1942-11-09 Improvements in or relating to screws and nuts Expired GB562248A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH562248X 1941-12-09

Publications (1)

Publication Number Publication Date
GB562248A true GB562248A (en) 1944-06-23

Family

ID=4520381

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15792/42A Expired GB562248A (en) 1941-12-09 1942-11-09 Improvements in or relating to screws and nuts

Country Status (3)

Country Link
CH (1) CH225018A (en)
FR (1) FR891717A (en)
GB (1) GB562248A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777353A (en) * 1952-10-30 1957-01-15 Robert W Willis Screw socket construction having tool guiding means formed therein
US4125051A (en) * 1977-06-09 1978-11-14 Illinois Tool Works Inc. Tamperproof fastener
GB2149872A (en) * 1983-11-17 1985-06-19 Peter John Gill Tamper resistant fasteners
ES2353182A1 (en) * 2010-09-10 2011-02-28 Ridelin S.L. Tightening element for electrical connector. (Machine-translation by Google Translate, not legally binding)
WO2015005478A1 (en) * 2013-07-12 2015-01-15 日東精工株式会社 Fastening tool with tamper-proof drive hole

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1057395B (en) * 1956-06-07 1959-05-14 Kellermann Fa Rudolf Over-rotation protection for head screws or nuts

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777353A (en) * 1952-10-30 1957-01-15 Robert W Willis Screw socket construction having tool guiding means formed therein
US4125051A (en) * 1977-06-09 1978-11-14 Illinois Tool Works Inc. Tamperproof fastener
GB2149872A (en) * 1983-11-17 1985-06-19 Peter John Gill Tamper resistant fasteners
ES2353182A1 (en) * 2010-09-10 2011-02-28 Ridelin S.L. Tightening element for electrical connector. (Machine-translation by Google Translate, not legally binding)
WO2015005478A1 (en) * 2013-07-12 2015-01-15 日東精工株式会社 Fastening tool with tamper-proof drive hole
JP2015017685A (en) * 2013-07-12 2015-01-29 日東精工株式会社 Fastener with tamper-proof drive hole

Also Published As

Publication number Publication date
CH225018A (en) 1942-12-31
FR891717A (en) 1944-03-17

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