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. 12, 1999
Filed:
Dec. 20, 1996
Masaki Kameyama, Kawasaki, JP;
Seigo Igaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An apparatus for measuring a maximum static friction force is disclosed, in which the displacement of the relative positions of first and second objects due to the operation of a driving unit is suppressed for measuring an accurate static friction force characteristic. The static friction force measuring apparatus for measuring the static friction characteristic between a first object fixed on a mounting base and a second object in contact with the first object and held in a holder comprises an external force buffer interposed between the mounting base and the mounting base side fixed end of the apparatus, a speed controller arranged in the drive unit for controlling the relative speeds of the holder and the mounting base to a level sufficiently low as compared with the resonance frequency of a frictional force detector, and a device for suppressing the displacement of the relative positions of the first and second objects to such an extent that the external force exerted substantially in parallel with the contact surface between the two objects exceeds the maximum static friction force. The frictional force detector detects the maximum static friction force immediately before the displacement begins between the two objects.