US Patent: 2,734,411
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| Predetermined Torque Release Socket Wrench
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Patentee:
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| Robert Glen Woods (exact or similar names) - Huntington Park, CA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 15, 1954 |
| Granted: |
Feb. 14, 1956 |
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Stan Schulz
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Description: |
| Francis A. Utecht Jr. - patent attorney
A very large number of adjustable torque wrenches are undergoing daily use in many industries. Generally, these adjustable torque wrenches include a load-engaging member and a spring, which resists the movement of the load-engaging member until a desired amount of torque is applied thereby. The imposition of such torque upon the load-engaging member overcomes the force of the spring and the latter is deformed, thereby permitting a limited movement of the load-engaging member to occur. Such movement provides an indication that a desired amount of torque has been applied to the load. After a certain amount of usage, it becomes necessary to replace the original spring with a new one. This involves a major difficulty, because of the wide variation in spring rates encountered with commercially available springs. While all springs of a similar commercial classification ostensibly have identical characteristics, as a practical matter this is not true. The spring rates of such springs actually vary widely from one another. Because of such spring rate variation, it is often impossible to satisfactorily effect calibration of the wrench by adjustment of the spring alone. A major object of the present Invention is to provide a new and improved torque wrench of the adjustable type. Another object is to provide an adjustable torque wrench having novel means to compensate for the wide variation in the spring rates of commercially available springs. An important object of the present invention is to provide an adjustable torque wrench of compact size and light weight which is economical of construction. This object is accomplished in part by the provision of a wrench capable of utilizing a spring of minimum size and strength for a maximum load-applying rating of the wrench. An additional object of the invention is to provide an adjustable torque wrench, which is simple of design and tugged of construction whereby it may provide a long and useful service life.
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