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. 11, 1994
Filed:
Mar. 24, 1992
Takao Yokota, Fuchu, JP;
Yasuo Wada, Fuchu, JP;
Ryobi Limited, Tokyo, JP;
Abstract
A torque adjustment device is disclosed which enhances durability and in which it is easy to set a maximum torque and to perform fine adjustment while normally keeping constant a rotational force of a torque adjustment sleeve. A cylindrical clutch adjustment handle is rotatably mounted at an opening portion of a housing. A clutch case is received within the clutch adjustment handle. A plurality of slant surfaces which are different in height in the axial direction are formed in an inner circumferential portion of the clutch adjustment handle. A clutch plate is supported to the slant surfaces. Also, the clutch plate is displaceably mounted along an outer peripheral portion of the clutch case. Steel balls which are held by a clutch surface of an inwardly toothed gear are received in holes of the clutch case. A spring is interposed between an abutment plate in abutment with the steel balls and the clutch plate. A plurality of recesses are formed in a flanged portion of the clutch adjustment handle. A projection of a positioning plate is engaged with the associated recess.