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. 18, 2023
Filed:
Dec. 31, 2019
Yanfeng International Seating Systems Co., Ltd., Shanghai, CN;
Qingwei Feng, Shanghai, CN;
YANFENG INTERNATIONAL SEATING SYSTEMS CO., LTD., Shanghai, CN;
Abstract
The present invention discloses a rotation device for a vehicle seat. The device includes a fixed disc, a lower ball assembly, a movable disc, an upper ball assembly, and a platen successively arranged from bottom to top. A first lower circular track is formed on the fixed disc. A first upper circular track and a second lower circular track are formed on the movable disc. A second upper circular track is formed on the platen. A diameter of a first arcuate envelope line of the first lower circular track that is in contact with a lower ball and a diameter of a second arcuate envelope line of the first upper circular track that is in contact with the lower ball are both equal to a diameter of the lower ball, and a height of the first arcuate envelope line and a height of the second arcuate envelope line are 0.8 times the diameter of the lower ball. A diameter of a third arcuate envelope line of the second lower circular track that is in contact with an upper ball and a diameter of a fourth arcuate envelope line of the second upper circular track that is in contact with the upper ball are both equal to a diameter of the upper ball, and a height of the third arcuate envelope line and a height of the fourth arcuate envelope line are both 0.8 times the diameter of the upper ball. By means of the present invention, a smooth rotary operating force can be achieved, and a service life of the rotation device can be properly prolonged.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile