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:
Jul. 08, 1997
Filed:
Dec. 16, 1994
Applicant:
Inventors:
Kazunari Kawabata, Kanagawa, JP;
Hisayoshi Chino, Kanagawa, JP;
Assignee:
Sony Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360109 ; 360 7716 ;
Abstract
A rotary magnetic head device in which the amount of protrusion of a magnetic head with changes in temperature is comprised within a pre-set range for assuring stable contact between the magnetic head and the recording medium. The head base (1) and the electromechanical transducer element (2) are formed of materials having the linear expansion coefficient in substantially the same range.