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:
Dec. 30, 2025
Filed:
Dec. 19, 2024
Kubota Corporation, Osaka, JP;
Ryunosuke Tanaka, Amagasaki, JP;
Keita Oda, Amagasaki, JP;
KUBOTA CORPORATION, Osaka, JP;
Abstract
A seal member includes a heel fitted into a setting groove of a socket and a bulb-shaped portion to be compressed between the socket and a spigot. The bulb-shaped portion includes a first and a second projecting portion respectively formed on the outer side and the inner circumferential side thereof. A first radius of a first circle of the first projecting portion is smaller than a second radius of a second circle including a circular arc-shaped outline of the second projecting portion. The center of the first circle is located within the second circle. The distance between the center of the first circle and the center of the second circle in the axial direction of the seal member is smaller than the difference between the second radius and the first radius.