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:
Jun. 28, 2022
Filed:
Apr. 09, 2018
Bridgestone Corporation, Tokyo, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
In a vibration dampening device () in an embodiment, a restriction passage () includes a first communication portion () that is open to a main liquid chamber (), a second communication portion () that is open to an auxiliary liquid chamber (), and a main body flow path () that causes the communication portions to communicate with each other, the first communication portion () includes a plurality of pores () penetrating a first barrier () having a surface () facing the main liquid chamber (), and a protrusion () which protrudes toward the main liquid chamber () or the auxiliary liquid chamber () is formed over an entire circumference of an opening circumferential edge portion of the pore () in the surface ().