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:
May. 10, 1983
Filed:
Jun. 02, 1981
Shigenori Andoh, Narashino, JP;
Toshiharu Kogure, Narashino, JP;
Seiko Seiki Kabushiki Kaisha, , JP;
Abstract
A spindle device comprises a spindle housing having rotatably mounted therein a hollow tubular spindle and a rotary motor for rotationally driving the spindle. One end of the spindle projects outwardly of the housing, and the other end of the spindle is disposed within the housing. A lubricating oil system flows oil through the hollow spindle to the work tool and the system includes an oil conduit which extends a predetermined extent into the interior of the hollow spindle at the spindle other end with a small clearance between the conduit and the spindle. A helical recess is formed on the outer periphery of the oil conduit, or the inner periphery of the spindle, or both, in the region where the oil conduit extends into the spindle so that during high speed rotation of the spindle, a helical airflow is created in the region where the lubricating oil enters the spindle to prevent the outflow of oil from the spindle other end.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile