Tools – Wrench – screwdriver – or driver therefor – Responsive to torque on work
Patent
1989-03-01
1990-02-06
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Responsive to torque on work
81478, B25B 23142
Patent
active
048980684
ABSTRACT:
A torque wrench comprises an elongate outer housing, an elongate inner part extending in and beyond the outer housing and pivotally connected thereto proximate an end in common of the torque wrench, the extending portion of the inner part providing a handle for the wrench at the end thereof opposite the end in common, the outer housing being adapted to hold a tool at the end in common preferably free of the inner part, and a spring-loaded toggle lever mechanism acting between the handle portion of the inner part and the outer housing and arranged to release when a predetermined torque, that is transmitted to the tool through the handle portion, the toggle lever mechanism, and the outer housing, is exceeded, thereby causing pivotal movement between the outer housing and the inner part. Mechanism is provided, preferably internally of the wrench, whereby spring tension of the toggle lever mechanism can be adjustably set manually from the exterior of the wrench, and a scale is associated with the toggle lever mechanism so that it can be read by the user of the wrench.
REFERENCES:
patent: 3202021 (1965-08-01), Livermont
patent: 4655104 (1987-04-01), Blattner
Eduard Wille GmbH u. Co.
Smith James G.
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