FR2344741A1 - Tap with taper section - has continuous cutting edge and is operable with constant torque - Google Patents

Tap with taper section - has continuous cutting edge and is operable with constant torque

Info

Publication number
FR2344741A1
FR2344741A1 FR7608567A FR7608567A FR2344741A1 FR 2344741 A1 FR2344741 A1 FR 2344741A1 FR 7608567 A FR7608567 A FR 7608567A FR 7608567 A FR7608567 A FR 7608567A FR 2344741 A1 FR2344741 A1 FR 2344741A1
Authority
FR
France
Prior art keywords
tap
operable
constant torque
cutting edge
continuous cutting
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.)
Granted
Application number
FR7608567A
Other languages
French (fr)
Other versions
FR2344741B1 (en
Inventor
Claude Perret
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.)
Cefilac SA
Original Assignee
Cefilac 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 Cefilac SA filed Critical Cefilac SA
Priority to FR7608567A priority Critical patent/FR2344741A1/en
Publication of FR2344741A1 publication Critical patent/FR2344741A1/en
Application granted granted Critical
Publication of FR2344741B1 publication Critical patent/FR2344741B1/fr
Granted 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
    • 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
    • F16B25/0042—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 the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0047—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 the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Jars (AREA)

Abstract

The pitch of the thread is constant and has a number of turns which have a smaller major and minor diameter and having the same difference in diameters. The nominal diameter threads are adjacent to the reduced diameter threads. The nominal diameter threads are also at the end of the top. The cap can be operated by a constant torque. The thread profile is constant for any tap and may be to any recognised standard. The depth of tooth is even along the length of the thread.
FR7608567A 1976-03-15 1976-03-15 Tap with taper section - has continuous cutting edge and is operable with constant torque Granted FR2344741A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7608567A FR2344741A1 (en) 1976-03-15 1976-03-15 Tap with taper section - has continuous cutting edge and is operable with constant torque

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7608567A FR2344741A1 (en) 1976-03-15 1976-03-15 Tap with taper section - has continuous cutting edge and is operable with constant torque

Publications (2)

Publication Number Publication Date
FR2344741A1 true FR2344741A1 (en) 1977-10-14
FR2344741B1 FR2344741B1 (en) 1979-10-05

Family

ID=9170883

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7608567A Granted FR2344741A1 (en) 1976-03-15 1976-03-15 Tap with taper section - has continuous cutting edge and is operable with constant torque

Country Status (1)

Country Link
FR (1) FR2344741A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3207975A1 (en) * 1982-03-05 1983-09-15 Richard Bergner GmbH & Co, 8540 Schwabach THREAD SELF-FORMING SCREW

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3207975A1 (en) * 1982-03-05 1983-09-15 Richard Bergner GmbH & Co, 8540 Schwabach THREAD SELF-FORMING SCREW
US4527932A (en) * 1982-03-05 1985-07-09 Richard Bergner Gmbh & Co. Self-tapping screw

Also Published As

Publication number Publication date
FR2344741B1 (en) 1979-10-05

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse