US Patent: 1,489,458
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| Wrench
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Patent Dates:
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| Applied: |
Jan. 25, 1923 |
| Granted: |
Apr. 08, 1924 |
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Patent Pictures:
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1 | 2 | 3
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William Petersen Pat. April 28, 1924 |
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Petersen Mfg. Co. (Nebraska State Historical Society)
75th Anniversary of the Vise-Grip (tooltalk)
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Description: |
| A major reworking of Petersen's Oct. 4, 1921 Pat. (no. 1,392,443), the "2nd Model" vise-grip has the adjusting bolt and locking lever. Early production at DeWitt, Nebraska assembled tools from forgings produced at Buffalo, NY. Some of the oldest surviving examples are stamped "S.P.W.Co." reflecting the short-lived Sire-Petersen business partnership. The frame and lever handle forgings were eventually replaced by stamped pieces fabricated at DeWitt. A few of the earliest stamped steel body Vise-Grip® pliers using the 1924 design (see 3rd picture) have survived. Petersen's May 21, 1940 patent (no. 2,201,918) and April 14, 1942 patent (no. 2,280,005) show the parts made of stampings.
This patent is cited in pat. no 3,192,804 used for the Vise-Grip® 20R chain wrench in the 1960s.
Other locking plier patents citing this patent include nos. 2,299,454, 2,478,696, and 2,574,676. |
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