Tools – Wrench – screwdriver – or driver therefor – Handle or shank
Reexamination Certificate
2006-06-27
2006-06-27
Thomas, David B. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Handle or shank
C081S177600, C081S177800
Reexamination Certificate
active
07066059
ABSTRACT:
A bendable spanner comprises a driving head having a driving portion at a front end thereof for engaging with a screw means; a length of the driving head being L3; a pivotal unit; the driving head being pivotally installed to the pivotal unit; a length of the pivotal unit being L2; and a holding portion; one end of the holding portion being pivotally installed to the pivotal unit; a length of the holding portion being L1. The length of L1is greater than or equal to 1.5 times of the L2, and the length of L1is greater than or equal to 1.15 times of L3. Moreover in the present invention, another end of the holding portion is connected to a pivotal unit and then the pivotal unit is further connected to a driving head.
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patent: 6877404 (2005-04-01), Chen
patent: 2004/0083861 (2004-05-01), Hu
patent: 2004/0261586 (2004-12-01), Chen
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