Tools – Wrench – screwdriver – or driver therefor – Responsive to torque on work
Reexamination Certificate
2011-05-17
2011-05-17
Thomas, David B (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Responsive to torque on work
C081S477000
Reexamination Certificate
active
07942085
ABSTRACT:
A double-fulcrum torque wrench including a tubular body, a head section for fitting with a socket or a screwing member and a flexible mechanism including a flexible section. The flexible mechanism is connected with a rear end of the head section and disposed in the tubular body. The head section protrudes from a front end of the tubular body. When a wrenching force is applied to the wrench, the flexible section of the flexible mechanism is flexible. The head section and the flexible mechanism are connected with the tubular body via two fulcrums and the flexible section is positioned between the two fulcrums. By means of the double-fulcrum design, the action force at the force application end of the wrench is equal to the action force at the resistance end. In addition, the flexure of the wrench and the actual wrenching torque applied to the wrench can be more accurately and sensitively measured.
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Guice Patents PLLC
Thomas David B
LandOfFree
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