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2 142 867

(13)

(51)

IPC

(21) (22)

Application

98104245/02, 1998-02-23

(24)

Start date

1998-02-23

(22)

Actual filing date

1998-02-23

(45)

Published

1999-12-20

(72)

Inventor

Suslov A.G.Ushakov I.A.Prokof'Ev A.N.

(73)

Holder

Suslov Anatolij Grigor'EvichUshakov Igor' Anatol'EvichProkof'Ev Aleksandr Nikolaevich

COMBINATION TYPE (CUTTING-DEFORMING) SCREW TAP Russian patent published in 1999 - IPC

Abstract RU 2142867 C1

FIELD: high accuracy and high quality threading. SUBSTANCE: chip grooves form on threading portion of screw tap cutting and deforming teeth provided with full-profile thread. EFFECT: enhanced efficiency due to use of cutting teeth, enhanced operational properties due to surface plastic deformation of thread. 3 dwg

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RU 2 142 867 C1

Authors

Suslov A.G.

Ushakov I.A.

Prokof'Ev A.N.

Dates

1999-12-20—Published

1998-02-23—Filed