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:
Oct. 13, 2026
Filed:
Sep. 13, 2024
Western Digital Technologies, Inc., San Jose, CA (US);
Toan Le, San Jose, CA (US);
Kia Moh Teo, San Jose, CA (US);
Haruhide Takahashi, Yokohama, JP;
Yanning Liu, San Jose, CA (US);
Toshihisa Okazaki, Bangkok, TH;
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
A head stack assembly (HSA) for a hard disk drive includes a carriage from which multiple arms extend, where the arms include an outer arm at each end of the carriage and inner arms between the outer arms, such that each inner arm carries two suspension assemblies and each outer arm carries only one suspension assembly coupled with an inner side of the outer arm, with each suspension assembly including a corresponding fine actuator. The HSA further includes a counter-suspension assembly coupled to an outer side of each outer arm, where each counter-suspension assembly includes a structurally flexible dummy load beam having a mass distribution and a stiffness distribution configured to mitigate multiple structural dynamics modes of the operating suspension assembly coupled to the inner side of the outer arm.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile