Sound base of torque wrench
AssigneeKabo Tool Company
InventorChih-Ching HSIEH
Life of this patent
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Abstract
The present invention provides a sound base of torque wrench comprising a base and an outer sleeve, a hardness of the outer sleeve is lower than a hardness of the base, the outer sleeve is hollow with a peripheral wall, and the peripheral wall is sleeved around the base; and at least one oil accommodating groove disposed on an outer peripheral surface of the peripheral wall. Thereby, the sound base uses the oil accommodating groove to accommodate lubricating oil, so that the sound base has a long-term lubricating effect, and long-term lubrication can be achieved when the sound base is operated in a wrench in order to have low frictional resistance, and thus the wrench can maintain a certain precision on a long-term basis.
Claims13
A sound base of torque wrench comprising:
- a base made of a metal material, and having two ends with one of the ends being an actuate end to form an actuating portion;
- an outer sleeve made of a metal material with a hardness softer than that of the base, and the outer sleeve being hollow with a peripheral wall sleeving around the base;
- and
- one or more than one oil accommodating groove disposed on an outer peripheral surface of the peripheral wall of the outer sleeve, and the oil accommodating groove being capable of accommodating lubricating oil.
Dependencies are inferred from the claim text.