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. 01, 1991
Filed:
Mar. 30, 1990
Seitaro Go, Tsuruga, JP;
Gotech, Limited, Fukui, JP;
Abstract
An elongated wrench for fastener bolts, such as commonly used with nuclear fuel assemblies for a boiling water type nuclear reactor. The bolt wrench includes a socket wrench mounted to a control rod, an outer cover for supporting the control rod for axial as well as rotational movement therein, a plurality of releasable hooks pivotally mounted to the control rod around the socket wrench, and a control lever for moving the outer cover relative to the control rod to cause the releasable hooks to grip a fastener bolt. In a second embodiment, a pair of releasable hooks having guide rollers are pivotally mounted to a support sleeve which, in turn, is mounted on the outer cover for axial movement relative thereto. An actuator link having a pair of guide grooves adapted to receive the associated rollers is movable along the support sleeve in response to axial movement of the outer cover relative to the control rod. The guide grooves are configured to cause the releasable hooks to grip the bolt upon axial movement of the actuator link as caused by the axial movement of the outer cover.