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:
Sep. 15, 2020
Filed:
Oct. 17, 2018
Tdw Delaware, Inc., Wilmington, DE (US);
Khanh Van Nguyen, Stavanger, NO;
Hallgeir Foss Alsvik, Stavanger, NO;
TDW Delaware, Inc., Wilmington, DE (US);
Abstract
A mechanical lock unit with a shaft lock assembly and method of achieving a self-lock mode for, e.g., hydraulically activated isolation plug module. The shaft lock assembly includes a teeth-form ring that surrounds a shaft. The teeth-form ring defines a plurality of teeth. A teeth-form split gripper assembly is positioned to surround the teeth-form ring. The teeth-form split gripper assembly has at least a first teeth-form split gripper and a second teeth-form split gripper with a spring therebetween for biasing the first teeth-form split gripper away from said second teeth-form split gripper. The first teeth-form split gripper and the second teeth form split gripper having an inner surface that defines a plurality of teeth for cooperative engagement with the plurality of teeth of the teeth-form ring.