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.:
Date of Patent:
Jan. 03, 1995
Filed:
Dec. 02, 1993
Aichi Toyota Jidosha Kabushikikaisha, Nagoya, JP;
Abstract
An impact wrench having an improved air regulator comprises a cylindrical pipe provided on a handle, an air supply valve movably inserted in a back section of the cylindrical pipe, and a changeover valve movably inserted in a front section of the cylindrical pipe. The cylindrical pipe has a first air supply inlet and a second air supply inlet. The air supply valve has several air supply regulating slots of different diameters. The changeover valve has an an air supply reversing slot. The desired one of the air supply regulating slots is adapted to communicate with the first air supply inlet, so that the air flow to the air motor is regulated in the cylindrical pipe, thus obtaing a desired torque. The air supply reversing slot is adapted to communicate with the second air supply inlet only when the air motor is rotated counterclockwise. A compressed air is introduced into the air motor via the second air supply inlet, as well as the first air supply inlet communicating with the desired one of the air supply regulating slots. A more compressed air is supplied to the air motor when the air motor is rotated counterclockwise to produce an unfastening torque than when the air motor is rotated clockwise to produce a fasteing torgue.