NL7707804A - Screw with penetrating tip - has narrow cutting edge at free end with grooves on opposite sides - Google Patents

Screw with penetrating tip - has narrow cutting edge at free end with grooves on opposite sides

Info

Publication number
NL7707804A
NL7707804A NL7707804A NL7707804A NL7707804A NL 7707804 A NL7707804 A NL 7707804A NL 7707804 A NL7707804 A NL 7707804A NL 7707804 A NL7707804 A NL 7707804A NL 7707804 A NL7707804 A NL 7707804A
Authority
NL
Netherlands
Prior art keywords
grooves
tip
screw
free end
opposite sides
Prior art date
Application number
NL7707804A
Other languages
Dutch (nl)
Other versions
NL169916C (en
NL169916B (en
Original Assignee
Illinois Tool Works
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
Priority claimed from NL6703231A external-priority patent/NL6703231A/xx
Application filed by Illinois Tool Works filed Critical Illinois Tool Works
Publication of NL7707804A publication Critical patent/NL7707804A/en
Publication of NL169916B publication Critical patent/NL169916B/en
Application granted granted Critical
Publication of NL169916C publication Critical patent/NL169916C/en

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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/56—Making machine elements screw-threaded elements
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Dental Prosthetics (AREA)

Abstract

The screw has an integral portion accommodating a screwdriver and a forged penetrating tip whose dia. is = that of the threaded portion and >= that of the core. The tip has a narrow cutting edge (70) as its free end, and a set of cutting grooves in quadrants opposite each other and on opposite sides of this edge (48, 50) which is on the shank centre line. Guide end surfaces (60, 62) extending outwards and to the rear are provided between the grooves, which intersect them along cutting edges (44, 46). These edges run in a curve rearwards from the tip to the periphery of the tip body. The guide surfaces are forged and extend in a convex curve behind the edges with a varying radius greater than that of the body.
NLAANVRAGE7707804,A 1966-05-10 1977-07-13 SELF-DRILLING SCREW. NL169916C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54889266A 1966-05-10 1966-05-10
NL6703231A NL6703231A (en) 1966-05-10 1967-02-28

Publications (3)

Publication Number Publication Date
NL7707804A true NL7707804A (en) 1977-10-31
NL169916B NL169916B (en) 1982-04-01
NL169916C NL169916C (en) 1982-09-01

Family

ID=26644161

Family Applications (1)

Application Number Title Priority Date Filing Date
NLAANVRAGE7707804,A NL169916C (en) 1966-05-10 1977-07-13 SELF-DRILLING SCREW.

Country Status (1)

Country Link
NL (1) NL169916C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4586862A (en) * 1981-01-12 1986-05-06 Katsuhisa Yamasaki Drilling screw

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4586862A (en) * 1981-01-12 1986-05-06 Katsuhisa Yamasaki Drilling screw
US4677703A (en) * 1981-01-12 1987-07-07 Topura Co., Ltd. Dies for forming drilling screws

Also Published As

Publication number Publication date
NL169916C (en) 1982-09-01
NL169916B (en) 1982-04-01

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Legal Events

Date Code Title Description
V4 Lapsed because of reaching the maximum lifetime of a patent