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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4121670 B1

PDFFull Text
Date of Patent:
Oct. 24, 1978

Filed:

Feb. 25, 1977

Impact wrench

Applicant:
Inventors:

Georgy Afanasievich Antipov, Moscow, SU;

Vitaly Alexandrovich Berezhnoi, Rostov-na-Donu, SU;

Mikhail Lvovich Gelfand, Moscow, SU;

Boris Grigorievich Goldshtein, Moscow, SU;

Leonid Avrumovich Gornik, Moscow, SU;

Nikolai Stanislavovich Lavnikov, Rostov-na-Donu, SU;

Leonid Nikolaevich Teres, Rostov-na-Donu, SU;

Ivan Ivanovich Urazhdin, Rostov-na-Donu, SU;

Yakov Isaakovich Tsipenjuk, Solntsevo Moskovskoi oblasti, SU;

Petr Stepanovich Yakubovsky, Rostov-na-Donu, SU;

Assignee:

Vsesojuzny Nauchno-Issledova-Telsky I Proektno-Konstruktorsky Institut, , US;

Attorneys:

Burns; Robert E.

Lobato; Emmanuel J.

Adams; Bruce L.

Primary Examiner:

Robert A Hafer

Int. Cl.
CPC ...
B21J / ;
U.S. Cl.
CPC ...
173 20 ; 173-1 ; 91 35 ;
Abstract

The invention relates to impact wrenches for tightening threaded joints comprising an impact clutch accommodated in a housing and having a hammer which is axially movable for imparting each blow, and a device for automatically limiting the number of blows to a pre-set number of blows. The device for automatically limiting the number of blows comprises a blow number setter, a movable member directly co-operating with the hammer and axially movable upon each axial displacement of the hammer so as to enable the axial displacement of the hammer until a pre-set number of blows are delivered, and a locking device for locking the movable member against displacement in the position preventing further axial movement of the hammer after the ultimate blow of the pre-set number of blows is delivered. Thus the possibility of imparting blows in excess is eliminated without deenergization of the impact wrench drive, and the construction of the impact wrench is simplified.

Find Patent Forward Citations

Antipov, Georgy. (1978). Impact wrench (U.S. Patent No. 4121670). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4121670

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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