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. 18, 2022
Filed:
Feb. 21, 2018
Mitsubishi Heavy Industries Machinery Systems, Ltd., Kobe, JP;
Bridgestone Corporation, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES MACHINERY SYSTEMS, LTD., Kobe, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
The present invention includes a shaft that protrudes further toward a lower spindle side than an upper rim and includes a plurality of engagement grooves arranged in an up-down direction at an outer periphery of a lower end accommodated in a hollow portion of the lower spindle; a shaft support part that rotatably supports an upper end of the shaft; an engagement part that is accommodated within the hollow portion and is engaged with any one engagement groove of the plurality of engagement grooves; a first elevating part that is configured to integrally move the upper spindle, the shaft, and the shaft support part in the up-down direction; and a second elevating part that adjusts the length of the shaft protruding below the upper rim by changing the distance between the shaft support part and the upper spindle.