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. 31, 1995
Filed:
Oct. 28, 1993
Shuichi Tooi, Tochigi, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
An object of this invention is to provide a track ball coordinate data inputting device in which means for holing supporting ball elements adapted to support the ball is simplified in structure, so that the supporting ball elements can be built in it with ease. In a track ball coordinate data inputting device, supporting ball element holding sections for holding supporting ball elements adapted to support a ball have inserting grooves which are each like a cut circle in section which is obtained by cutting a true circle equal in diameter to the supporting ball element with a chord shorter than the diameter. Each of the inserting grooves is engraved in the spherical inner wall surface of the accommodating section in such a manner that it is extended downwardly from the upper edge of the spherical inner wall surface and is wide enough to allow the passage of the supporting ball element. Each inserting grooves has a lower end portion formed into a lower surface receiving portion which has a spherical surface for receiving the supporting ball element, a lower wall portion formed into thin side surface receiving portions which are elastically flexible in a direction of groove width, and catching protrusions above the side surface receiving portions which are protruded inwardly of the inserting groove.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile